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  • Costa, Carolina
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Chemical Engineering.
    Medronho, Bruno
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Chemical Engineering. University of Algarve, Faro, Portugal.
    Filipe, Alexandra
    University of Algarve, Faro, Portugal.
    Mira, Isabel
    RISE, Stockholm.
    Lindman, Björn
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Chemical Engineering.
    Edlund, Håkan
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Chemical Engineering.
    Norgren, Magnus
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Chemical Engineering.
    Emulsion formation and stabilization by biomolecules: The leading role of cellulose2019In: Polymers, ISSN 2073-4360, E-ISSN 2073-4360, Vol. 11, no 10, article id 1570Article in journal (Refereed)
    Abstract [en]

    Emulsion stabilization by native cellulose has been mainly hampered because of its insolubility in water. Chemical modification is normally needed to obtain water-soluble cellulose derivatives. These modified celluloses have been widely used for a range of applications by the food, cosmetic, pharmaceutic, paint and construction industries. In most cases, the modified celluloses are used as rheology modifiers (thickeners) or as emulsifying agents. In the last decade, the structural features of cellulose have been revisited, with particular focus on its structural anisotropy (amphiphilicity) and the molecular interactions leading to its resistance to dissolution. The amphiphilic behavior of native cellulose is evidenced by its capacity to adsorb at the interface between oil and aqueous solvent solutions, thus being capable of stabilizing emulsions. In this overview, the fundamentals of emulsion formation and stabilization by biomolecules are briefly revisited before different aspects around the emerging role of cellulose as emulsion stabilizer are addressed in detail. Particular focus is given to systems stabilized by native cellulose, either molecularly-dissolved or not (Pickering-like effect). 

  • Chudinova, E.
    et al.
    National Research Tomsk Polytechnic University, Tomsk, Russian Federation.
    Surmeneva, M.
    National Research Tomsk Polytechnic University, Tomsk, Russian Federation.
    Koptioug, Andrei
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Quality Management and Mechanical Engineering.
    Sokolova, V.
    University of Duisburg-Essen, Essen, Germany.
    Prymak, O.
    University of Duisburg-Essen, Essen, Germany.
    Bouckercha, S.
    University of Duisburg-Essen, Essen, Germany.
    Epple, M.
    University of Duisburg-Essen, Essen, Germany.
    Surmenev, R.
    National Research Tomsk Polytechnic University, Tomsk, Russian Federation.
    Determination of the properties and loading efficiency of encapsulated BSA-FITC and dexamethasone for drug delivery systems2019In: IOP Conference Series: Materials Science and Engineering, Institute of Physics Publishing (IOPP), 2019, Vol. 597, no 1, article id 012056Conference paper (Refereed)
    Abstract [en]

    In this work porous microparticles of calcium carbonate were synthesized with bovine serum albumin - fluorescein isothiocyanate conjugate (BSA-FITC) and dexamethasone, and then used for encapsulation in polymer microcapsules by means of layer-by-layer assembly (LbL). The properties of the obtained microcapsules were characterized by scanning electron microscopy, dynamic light scattering, infrared-, ultraviolet- and visible spectroscopy. According to the performed DLS measurements, an average hydrodynamic diameter ranged from 4 to 8 m and zeta-potential for all types of capsules was determined as -18 and -21 mV. BSA-FITC was encapsulated using this approach yielded a loading efficiency of 49 % protein. This value calculated for dexamethasone was of 38%. The microcapsules filled with an encapsulated drug may find applications in the field of biotechnology, biochemistry, and medicine. 

  • Lendin, Emma
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Systems and Technology.
    Information som bevis inom arkiv- och informationsvetenskap och e-Discovery2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This essay presents a qualitative research undertaken with the purpose of showing similarities and differences in the views on preservation of records as evidence within archival and information sciences compared to the ones within e-Discovery. Further, the goal with the research was also to increase the understanding for how the demands are viewed, that are put on preserved information for it to be usable as evidence, both short and long term. The data which have been gathered are mainly academic articles and other texts, where a qualitative content analysis has been used to interpret the latent information in these texts. The theory used to conduct this analysis is the Records Continuum theory, where the Evidentiality axle has been of the most use. The result shows that the views on preservation pf records as evidence differ between the archival sciences and e-Discovery, but that there are also similarities. It also shows that the period of time in which information is considered worth preserving differs between the two and that this is due to the fact that their areas of focus are different. This ultimately affects in what contexts information is preserved, and also its value as evidence.

     

     

  • Aguirre Plasencia, Gessica
    Mid Sweden University, Faculty of Human Sciences, Department of Economics, Geography, Law and Tourism.
    The Green Marketing Mix and its influence on organic (green) food consumption: A study from the food retailer perspective2019Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This thesis seeks to address the topic of how the leading Swedish food retailers applied the 4 Ps of the green marketing mix (product, price, promotion, place) when offering organic food. Firstly, the food retailers segment all the consumers in different categories, but the green consumer is not one of them. Subsequently, they target the whole market with varying strategies for positioning. For short-term positioning works the announcements of discounts in the shops. Launching promotional campaigns online and advertising on TV has given favourable outcomes of long-term and allowed the recognition of the people of the green food brand.However, there is a lack of effective use of the elements of green marketing, especially in green product and the green promotion. Regarding green price, they strive to reduce overprices to attract more consumers. About the green place, all have a lot to improve. In sum, the strategies of green marketing mix of supermarkets could be slowing down the organic food consumption.

  • Sanden, Erlend
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design.
    RF Energy Harversting: Design and implementation of an RF energy harvesting system for SoC2019Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    This assignment was given by Nordic Semiconductor. In this project a radio frequency energy harvesting system able to harvest ambient power at 900 MHz (GSM) was simulated and designed. A Villard voltage multiplier, boost converter and power management circuit was implemented for the harvesting system. The intention was to implement a system which would give sufficient output power and voltage to supply a load (nRF52810) at all times. The nRF52810 is a power efficient multi protocol SoC made by Nordic Semiconductor. Since the power harvested by the antenna is of AC power, a recti er was needed. A Villard voltage multiplier was proposed as the most suitable application. It not only recti es the voltage, but the voltage doubles for every stage. A 2-stage Villard voltage multiplier was proposed with the advantage that in theory the output voltage should be four times higher in magnitude than the input voltage. There exists several other ways to boost a voltage, a voltage boost converter was combined with the Villard Voltage multiplier. According to calculations the boost converter should boost the voltage up to 2.3 V.

    Since the assumed power from the harvesting system may be lower than the power consumed by the load, a power managing circuit was also needed, which would avoid the load to drain the current from the storage element before the voltage level was sufficient. Different solutions for a power management circuit was proposed using different variations of MOSFETs. A real-life design was implemented, but the Villard voltage multiplier gave out a much lower e efficiency than expected from simulations. The output power of the VVM was too low to supply the load (nRF52810).

  • Bergkvist, Måns
    et al.
    Mid Sweden University, Faculty of Human Sciences, Department of Economics, Geography, Law and Tourism.
    Lemon, Björn
    Mid Sweden University, Faculty of Human Sciences, Department of Economics, Geography, Law and Tourism.
    Mörka moln på himmeln?: Myndigheters anlitande av nationella molntjänstleverantörer för behandling och lagring av sekretessreglerade personuppgifter2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • Basir, Rabeea
    et al.
    School of Electrical Engineering and Computer Science, National University of Sciences and Technology, Islamabad 44000, Pakistan.
    Qaisar, Saad
    School of Electrical Engineering and Computer Science, National University of Sciences and Technology, Islamabad 44000, Pakistan.
    Ali, Mudassar
    School of Electrical Engineering and Computer Science, National University of Sciences and Technology, Islamabad 44000, Pakistan.
    Aldwairi, Monther
    College of Technological Innovation, Zayed University, Abu Dhabi 144534, UAE.
    Ashraf, Muhammad Ikram
    Centre for Wireless Communication, University of Oulu, 90014 Oulu, Finland.
    Mahmood, Aamir
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Systems and Technology.
    Gidlund, Mikael
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Systems and Technology.
    Fog Computing Enabling Industrial Internet of Things: State-of-the-Art and Research Challenges2019In: Sensors, ISSN 1424-8220, E-ISSN 1424-8220, Vol. 19, no 21, article id 4807Article in journal (Refereed)
    Abstract [en]

    Industry is going through a transformation phase, enabling automation and data exchange in manufacturing technologies and processes, and this transformation is called Industry 4.0. Industrial Internet-of-Things (IIoT) applications require real-time processing, near-by storage, ultra-low latency, reliability and high data rate, all of which can be satisfied by fog computing architecture. With smart devices expected to grow exponentially, the need for an optimized fog computing architecture and protocols is crucial. Therein, efficient, intelligent and decentralized solutions are required to ensure real-time connectivity, reliability and green communication. In this paper, we provide a comprehensive review of methods and techniques in fog computing. Our focus is on fog infrastructure and protocols in the context of IIoT applications. This article has two main research areas: In the first half, we discuss the history of industrial revolution, application areas of IIoT followed by key enabling technologies that act as building blocks for industrial transformation. In the second half, we focus on fog computing, providing solutions to critical challenges and as an enabler for IIoT application domains. Finally, open research challenges are discussed to enlighten fog computing aspects in different fields and technologies.

  • Humble, Niklas
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Computer and System Science.
    Mozelius, Peter
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Computer and System Science.
    Sällvin, Lisa
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Systems and Technology.
    On the Role of Unplugged Programming in K-12 Education2019In: Proceedings of the 18th European Conference on e-Learning, Aalborg University Copenhagen, Denmark, 7-8 November 2019 / [ed] Rikke Ørngreen, Mie Buhl and Bente Meyer, Reading, UK: Academic Conferences and Publishing International Limited, 2019, p. 224-230Conference paper (Refereed)
    Abstract [en]

    The integration of programming in K-12 setting is a global phenomenon with different implementations in different countries. In Sweden this is a rapid process where programming should be a part of K-12 mathematic and technology with an implementation during 2018 and 2019. The time frame has been narrowly defined, but there are few directives considering which types of programming that should be used. Three main programming types are textual programming, block programming and unplugged programming, this study has a focus on unplugged programming. The research question to answer was: Which are K-12 teachers attitudes on the role of unplugged programming in education? 

    The research study has been a qualitative cross-sectional study with the aim to collect teachers' attitudes towards unplugged programming halfway through their introductory programming course. Cross-sectional study is an approach to capture snapshots of an ongoing process at a given point in time. Data were collected from discussions and online postings during a workshop in the above-mentioned programming course. Participants postings have been grouped into categories in a content analysis based on the frequency of occurrence and relevance for answering the research question. 

    Findings show that most teachers see a benefit of unplugged programming as a means to learn the fundamental programming concepts in their teaching and learning activities. However, there are different opinions on when this unplugged introduction should occur. Some teachers also pointed out that unplugged programming could be used as an alternative to block programming and textual programming when the digital environment lacks or fails. Conclusions are that unplugged activities are a valuable complement to block programming and textual programming, but teachers have different opinions on the optimum age group for unplugged programming activities. The recommendations for K-12 teachers is to seriously consider the unplugged complement, both for pedagogical reasons and as a never-failing analogue backup. 

  • Jonsson, Amanda
    Mid Sweden University, Faculty of Human Sciences, Department of Economics, Geography, Law and Tourism.
    The Challenges Experienced by Females in Leading Positions within a Male-dominated organisation: A feministic study2019Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The study is conducted in cooperation with a gender research group, at Mid Sweden University as a part of their larger study of gender equality within the organisation SCA. The purpose is to identify the challenges that females experience as leaders within male-dominated industries. The research approach is based on social constructivism philosophy and with an abductive reasoning approach. The empirical data were gathered with a qualitative method, usinginterviews as a research tool. The analysis was conducted with temple analysis method. The research’s findings showed that the organisation had a stereotype of a leader that connects the ideal leader to the male stereotype, that creates challenges for females in leading positions. It also indicated that the organisation had masculine structures and that it values employee’s that are being decisive, competitive, result-focused, etc. The research result also indicated that thestereotypes in the organisation are creating challenges for females in both operating abilities and challenges with advancing/get employment as a leader.

  • Khadoor, Nadim Kvernes
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design.
    Audio classification with Neural Networks for IoT implementation2019Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    This project is based upon two previous projects handed to the author by the Norwegian University of Science and Technology in co-operation with Disruptive Technologies.

     

    The report discusses sound sensing and Neural Networks, and their application in IoT. The goal was to determine what type of Neural Networks or classification methods was most suited for audio classification. This was done by applying various classification methods and Neural Networks on a data set consisting of 8732 sound samples. These methods where logistic regression, Feed-Forward Neural Network, Convolutional Neural Network, Gated Recurrent Unit, and Long Short-term Memory network. To compare the Neural Networks the accuracy of the training data set and the validation data set were evaluated. Out of these methods the feed-forward network yielded the highest validation accuracy and is the preferable classification method. However, with more work and refinement the Long Short-term memory may prove to be the better solution.

     

    Future work with a Vesper V1010 piezoelectric microphone and IoT implementation is discussed, as well as the social and ethical difficulties proposed by what is essentially a data gathering system.

  • Public defence: 2019-11-22 13:15 L111, Sundsvall
    Nukala, Madhuri
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Mathematics and Science Education.
    Light scattering in two-dimensional inhomogeneous paper: Analysis using general radiative transfer theory2019Licentiate thesis, comprehensive summary (Other academic)
    Abstract [en]

    Modeling light scattering is important in diverse reasearch fields such as paper and print, optical tomography, remote sensing and also in computer rendering of im­ages. Particularly in paper and printing industry light scattering simulations play a significant role in understanding the optical response of paper in relation to its properties. Light scattering models are used in paper and print for improving the paper making process, designing new paper qualities, and evaluating printing tech­niques. The models most widely used for light scattering calculations in the paper and printing industry are based on the Kubelka-Munk theory. The theory proposed by Kubelka and Munk, a special case of radiative transfer theory, has several limi­tations and it can only be applied to homogeneous media with isotropic scattering and diffuse illumination. Real paper and print in particular do not satisfy these as­sumptions. These limitations of the Kubelka-Munk model encouraged scientists to develop models based on angle-resolved geometry to account for anisotropic scat­tering of light in paper and print, but in a single spatial dimension. To correctly represent spatial inhomogeneities like ink dots which spread as a function of depth, length and width of the paper, one-dimensional (lD) models are insufficient. In addi­tion to angle-resolved geometry, multi-dimensional models are necessary to analyze light scattering effects in a printed paper.

    The method used in this thesis, unlike the Kubelka-Munk method employs gen­eral radiative transfer formulation to obtain the reflectances of paper with inhomo­geneities like ink dots. These ink dots printed on plain sheet of paper are consid­ered to spread not only as a function of depth but also as a function of length or width of the paper. First, a numerical solution method comprising of a combination of discrete ordinates and finite differences is developed to solve the general two­dimensional (2D) radiative transfer equation (RTE) with the two dimensions repre­senting the depth and length of the paper. The solver is validated by comparing the results obtained with Monte Carlo simulations adapted to suit paper optics and DORT2002. For isotropic scattering, and for angles close to the normal direction, good agreement is observed among all the three solvers. As the anisotropy factor increases, the present solver needs higher number of radiation streams for conver­gence.

    The 2D radiative transfer (RT) solver is then applied to printed paper and re­flectances obtained are analyzed. The ink distribution is considered to be non-uniform such that the density of ink decreases linearly with depth. The dots are separated by a distance to study the interference pattern of the intensity distribution which is use­ful in understanding defects like print mottle, print density and optical dot gain. The reflectances obtained are analyzed based on medium parameters such as thickness of the paper sample, its optical parameters and assymetry factor. The illuminating and viewing angles and the depth of ink penetration also influence the optical response and appearance of print. It is observed that the reflectance of dots largely depends on the illuminating and viewing angles with an apparent increase in the size of the dots seen more prominently when viewed across the line.

    A 2D RT solver is superior in understanding the interference pattern of radiation as observed in the results presented in this thesis, when compared to a lD RT solver. A lD RT solver uses independent columns to approximate the radiation in the lateral direction. It also assumes that the layers in the lateral direction are homogeneous and the radiation from the columns do not interfere with each other. The independent column approximation pays little attention to the lateral variations in intensity.

  • Humble, Niklas
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Computer and System Science.
    Mozelius, Peter
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Computer and System Science.
    Teacher-supported AI or AI-supported teachers?2019In: Proceedings of the European Conference on the Impact of Artificial Intelligence and Robotics, EM-Normandie Business School Oxford, UK, 31 October-1 November 2019 / [ed] Paul Griffiths and Mitt Nowshade Kabir, England: Academic Conferences and Publishing International Limited, 2019, Vol. 1, p. 157-164, article id ECIAIR.19.007Conference paper (Refereed)
    Abstract [en]

    Today, AI has a rapid dissemination and is becoming involved in many new areas. One of these areas is education, with AI in education (AIED) as an emerging research topic. When AIED will be applied in educational settings, would AI be implemented as a teacher support, or will the teachers support the AI systems? The aim of this study was to analyse contemporary research on AIED and discuss its possibilities and challenges. 

    This study was carried out as a literature review, where found themes and patterns have been categorised in a thematic analysis. Important main keywords in the search where: human-compatible AI, teachers, education, human-supported AI, AI-supported humans, AI in education. Keywords have been combined with Boolean operators to find articles containing information that was important to answer the research question. 

    In the deductive analysis found themes and patterns where grouped into the categories: teacher-supported AI, AI-supported teachers, teacher-compatible AI. Findings indicate that many studies lack a clear distinction between teacher-supported AI and AI-supported teachers. The recommendation is teacher-compatible AI, and that the combination of humans and AI is stronger than just one of them.

  • Humble, Niklas
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Computer and System Science.
    Mozelius, Peter
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Computer and System Science.
    Artificial Intelligence in Education - a Promise, a Threat or a Hype?2019In: Proceedings of the European Conference on the Impact of Artificial Intelligence and Robotics, EM-Normandie Business School Oxford, UK, 31 October-1 November 2019 / [ed] Paul Griffiths and Mitt Nowshade Kabir, England: Academic Conferences and Publishing International Limited, 2019, p. 149-156, article id ECIAIR.19.005Conference paper (Refereed)
    Abstract [en]

    The idea of creating intelligent machines and artificial intelligence (AI) have been around for centuries, and can be traced back to at least to the 14th century. Artificial Intelligence in Education (AIED) is a much younger discipline, but during the last 25 years there have been achievements in a number of fields which have made impact on education. Critical voices have been raised against the over-optimism in contemporary AI research. Less have been written about the high expectation of AIED and its potential impact on education. The aim of this study was to analyse and discuss AIED from the teacher perspective. 

    This study was carried out as a SWOT-analysis, with data gathered from a literature study. Main keywords in the literature search were: artificial intelligence, artificial intelligence in education, AIED, teacher perspective, education and teacher. Themes and patterns in the four main categories where further processed as a deductive-inductive thematic analysis. 

    Findings indicates that there are both promises and threats for the teacher in the contemporary AIED. In several aspects the field seems to be in a state of hype but as other hype areas there is a potential for maturing and with concrete applications in daily teaching and learning activities. Recommendations is to learn from traditional AI and to open up for an informative and nuanced discussion concerning the role of AI in education. Otherwise there is a risk for artificial education instead of artificial intelligence in education. 

  • Haugen, Petter
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design.
    Automotive Energy Harvesting2019Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Vibration measurements conducted in three vehicles windshields are used to determine frequency content in the windshield of moving vehicles. A piezoelectric energy harvester is modeled, and used in simulations to determine output voltage and power with measured acceleration signal as input. 

  • Etemad, Seyedeh Soma
    et al.
    Department of Forestry, Faculty of Natural Resources, University of Guilan, Sowmeh Sara, Iran.
    Mohammadi Limaei, Soleiman
    Mid Sweden University, Faculty of Human Sciences, Department of Economics, Geography, Law and Tourism. Department of Forestry, Faculty of Natural Resources, University of Guilan, Sowmeh Sara, Iran.
    Olsson, Leif
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Systems and Technology.
    Yousefpour, Rasoul
    Department of Forestry Economics and Forest Planning, University of Freiburg, Freiburg, Germany.
    Forest management decision-making using goal programming and fuzzy analytic hierarchy process approaches (case study: Hyrcanian forests of Iran): Forest management decision-making2019In: Journal of Forest Science, ISSN 1212-4834, E-ISSN 1805-935X, Vol. 65, no 9, p. 368-379Article in journal (Refereed)
    Abstract [en]

    The aim of this study is to determine the optimum stock level in the forest. In this research, a goal programming method was used to estimate the optimal stock level of different tree species considering environmental, economic and social issues. We consider multiple objectives in the process of decision-making to maximize carbon sequestration, net present value and labour. We used regression analysis to make a forest growth model and allometric functions for the quantification of carbon budget. Expected mean price is estimated using wood price and variable harvesting costs to determine the net present value of forest harvesting. The fuzzy analytic hierarchy process is applied to determine the weights of goals using questionnaires filled in by experts in order to generate the optimal stock level. According to the results of integrated goal programming approach and fuzzy analytic hierarchy processes, optimal volume for each species was calculated. The findings indicate that environmental, economic and social outcomes can be achieved in a multi-objective forestry program for the future forest management plans.

  • Pettersson, Stefan
    et al.
    University of Gothenburg; Swedish Olympic Committee, Stockholm.
    Edin, Fredrik
    University of Gothenburg.
    Bakkman, Linda
    Swedish Olympic Committee, Stockholm.
    McGawley, Kerry
    Mid Sweden University, Faculty of Human Sciences, Department of Health Sciences.
    Effects of supplementing with an 18% carbohydrate-hydrogel drink versus a placebo during whole-body exercise in -5 °C with elite cross-country ski athletes: a crossover study2019In: Journal of the International Society of Sports Nutrition, ISSN 1550-2783, E-ISSN 1550-2783, Vol. 16, no 1, article id 46Article in journal (Refereed)
    Abstract [en]

    BACKGROUND:

    Whilst the ergogenic effects of carbohydrate intake during prolonged exercise are well-documented, few investigations have studied the effects of carbohydrate ingestion during cross-country skiing, a mode of exercise that presents unique metabolic demands on athletes due to the combined use of large upper- and lower-body muscle masses. Moreover, no previous studies have investigated exogenous carbohydrate oxidation rates during cross-country skiing. The current study investigated the effects of a 13C-enriched 18% multiple-transportable carbohydrate solution (1:0.8 maltodextrin:fructose) with additional gelling polysaccharides (CHO-HG) on substrate utilization and gastrointestinal symptoms during prolonged cross-country skiing exercise in the cold, and subsequent double-poling time-trial performance in ~ 20 °C.

    METHODS:

    Twelve elite cross-country ski athletes (6 females, 6 males) performed 120-min of submaximal roller-skiing (69.3 ± 2.9% of [Formula: see text]O2peak) in -5 °C while receiving either 2.2 g CHO-HG·min- 1 or a non-caloric placebo administered in a double-blind, randomized manner. Whole-body substrate utilization and exogenous carbohydrate oxidation was calculated for the last 60 min of the submaximal exercise. The maximal time-trial (2000 m for females, 2400 m for males) immediately followed the 120-min submaximal bout. Repeated-measures ANOVAs with univariate follow-ups were conducted, as well as independent and paired t-tests, and significance was set at P < 0.05. Data are presented as mean ± SD.

    RESULTS:

    Exogenous carbohydrate oxidation contributed 27.6 ± 6.6% to the total energy yield with CHO-HG and the peak exogenous carbohydrate oxidation rate reached 1.33 ± 0.27 g·min- 1. Compared to placebo, fat oxidation decreased by 9.5 ± 4.8% with CHO-HG, total carbohydrate oxidation increased by 9.5 ± 4.8% and endogenous carbohydrate utilization decreased by 18.1 ± 6.4% (all P < 0.05). No severe gastrointestinal symptoms were reported in either trial and euhydration was maintained in both trials. Time-trial performance (8.4 ± 0.4 min) was not improved following CHO-HG compared to placebo (- 0.8 ± 3.5 s; 95% confidence interval - 3.0 to 1.5 s; P = 0.46). No sex differences were identified in substrate utilization or relative performance.

    CONCLUSIONS:

    Ingestion of an 18% multiple-transportable carbohydrate solution with gelling polysaccharides was found to be well-tolerated during 120 min of submaximal whole-body exercise, but did not improve subsequent maximal double-poling performance.

  • Sundberg, Leif
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Systems and Technology.
    If Digitalization is the Solution, What is the Problem?2019Conference paper (Refereed)
    Abstract [en]

    A range of policies on different levels of government (including EU, national, regional and local) concerns the use of digital technology. Drawing upon prior research that suggests that many e-Government policies contain myths and visionary images about technology, the purpose of this paper is to investigate the discourse on digitalization through an analysis of a Swedish digitalization policy. The research utilized a theoretical framework which describes four views on technology. The methodology used was interpretative, based on a "What’s the problem represented to be?" (WPR) approach. The findings suggest that the discourse on digitalization in the policy shifts between describing a serving, and a dictating technology. Digitalization is presented as a solution to external problems, based on the condition that we adapt to a future, data-driven society. The policy remains silent about groups and individuals that do not want take part in the digital society, since the proposed solution is that everyone should embrace the technology. The paper concludes with suggestions of alternative perspectives on technology. As such, this paper contributes to the current literature with critical reflections of how technology is represented in a digitalization policy.

  • Sörgård Svenning, Jörgen
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design.
    Using radar for monitoring lab rats: Data analysis and radar parameter tuning for rats2019Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    I April 2018 an experiment was conducted at the university of Bergen in collaboration with Novelda using the XeThru range-doppler radar. The goal of the experiment was to record data on rats using XeThru radar and by using traditional medical sensors, to see if a XeThru radar can be used instead of the traditional sensors. The data from the experiment consisted of data saved as EDF (European Data Format) from the traditional sensors, radar data and video. The rest goal of this thesis was to analyze the different data types. Then to look at the radar data with the goal of seeing if respiration detection on rats was possible and try to create a radar pro le for use on rats. This report focuses on only one of the rats from the experiment, because this rat was recorded using a video camera. In a preliminary project a python program had been written to use on the EDF data. The program was expanded upon in this thesis to optimize the performance. The python program took the EDF data and extracted the desired signal, data from a muscle sensor, and plotted it, making it possible to analyze. For the radar data Matlab was used, since Novelda already had the tools to process the data using that program. This worked using parameter les to set all the necessary settings to do a playback and change the radar and processing settings. The work then consisted of changing the parameters to get the best results on the data from the rats. A parameter le was created for use on rats that was based on the parameter le for respiration detection on adult humans. The conclusion on the EDF data was that it was not possible to nd a pattern for respiration using the muscle sensor. The radar data fortunately yielded better results. After much testing and optimization it was possible to get good respiration detection on rat 7. Some of the e ndings was possible noise problems and sources. The radar was mounted to the rack holding the cages. This meant it was susceptible to vibration noise form the other rats in the same rack and to the construction work being done at the university. Another problem with mounting of the radar was that is was to close to the cage, because the rat slept close to the wall of the cage closest to the radar. Then the problem of directly coupled energy interfered with the actual signal form the radar. It is still unclear if a radar sensor can replace the traditional sensors, but it is very possible to detect respiration on rats. With some more work, and possible a new experiment xing the noise sources, can make it possible.

  • Bergström, Robin
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Chemical Engineering.
    Reducering av utsläpp till luft: Optimering av SCA Ortvikens drift och underhållsarbete2019Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    SCA Ortvikens energiavdelning har fem stycken fastbränslepannor som försörjer interna förbrukare med processånga. Bränslet är i huvudsak bark, biologiskt slam och pelletspulver. SCA är ålagda att registrera utsläpp till luft och redovisa detta enligt de i verksamhetstillståndet villkorsbelagda utsläppen samt för kväveoxid-deklaration och för handel om utsläppsrätter för CO2. Förutom verksamhetstillståndet innefattas SCA Ortviken dessutom av förordningen 2013:252 Stora förbränningsanläggningar. För att redovisa detta används miljöredovisningssystemet ”MRS” från Entric AB. Drift-och underhåll saknar i nulägen en övergripande bild över MRS vilket skulle underlätta deras arbete för att säkerställa funktion på ingående signaler och därmed minska risken för mätbortfall vilket kan förebygga höga utsläpp under produktionen i framtiden. I detta arbete har, genom flödesscheman för de mest relevanta signaler och mätvärden vad gäller utsläpp som är kopplade till MRS, kunna underlätta för processoperatörer och underhållsorganisationen att säkerställa mätfunktionen. Arbetet har dessutom, genom analys av historiska data över driften, lett till förslag på åtgärder för att minska bildandet av olika utsläpp. Arbetet har visat att det finns många enkla åtgärder som kan göras för att minska utsläppen på redan befintligt installerad teknik på pannorna, men även gett förslag på annat teknik, och hur denna kan appliceras. Arbetet har också visat på brister i den nuvarande dokumentation-och signalhanteringen i avseende att göra mätvärden synliga i processystem andra än MRS.

  • Mauritzon, Albin
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Chemical Engineering.
    Lönsamhet för elvägar: Beräkningsmodell för lönsamheten samt optimal andel elväg på en sträcka2019Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Elvägar kan vara en lösning för att ställa om till ett hållbarare transportsystem. Med elvägar kan elfordon laddas med el medan de åker på vägen. Det finns flera olika tekniker för elvägar som är under utveckling, och det finns flera demonstrationsanläggningar i Sverige. Elways AB har utvecklat en teknik som fungerar för både lastbilar och personbilar.

    I denna rapport har en beräkningsmodell för återbetalningstiden utarbetats, och förslag har getts på hur stor andel elväg som ska täcka en sträcka. En stor andel elväg på en sträcka innebär en större investeringskostnad för elvägen medan batterierna i fordonen kan vara små. Motsatt förhållande gäller vid liten andel elväg. Syftet med denna rapport är främst att ge underlag för att avgöra optimal andel elväg på en sträcka, baserat på lönsamhetsberäkningarna.

    Relevanta ekvationer har tagits fram genom litteraturstudier, resonemang och härledningar. En viktig parameter är batteriernas livslängd, och en modell har använts som beräknar det beroende på användning. Beräkningarna innehåller ett antal osäkra parametrar, varför resultatet för flera olika scenarier presenteras. Fler känslighetsanalyser visas dessutom i bilaga.

    4 huvudsakliga slutsatser kan dras utifrån resultatet:

    • Det kan räcka att täcka cirka 30–35% av utvalda sträckor med elväg, med jämna intervall. Lönsamheten blir god, och investeringskostnaden blir förhållandevis låg, vilket underlättar i ett tidigt utbyggnadsskede när osäkerheterna kring tekniker och lönsamheten är stora.
    • När sedan erfarenheterna och antalet användare ökar och osäkerheterna minskar, kan elvägarna byggas ut, både med fler sträckor och större andel på de befintliga sträckorna.
    • Med en lägre hastighetsbegränsning på sträckan räcker det med ännu mindre andel elväg och återbetalningstiden förkortas.
    • Med personbilar medräknade blir lönsamheten signifikant bättre än när endast lastbilar räknas med. Detta gäller åtminstone vid högre andel elväg.
  • Michailoff, John
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Systems and Technology.
    Email Classification: An evaluation of Deep Neural Networks with Naive Bayes2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Machine learning (ML) is an area of computer science that gives computers the ability to learn data patterns without prior programming for those patterns. Using neural networks in this area is based on simulating the biological functions of neurons in brains to learn patterns in data, giving computers a predictive ability to comprehend how data can be clustered. This research investigates the possibilities of using neural networks for classifying email, i.e. working as an email case manager. A Deep Neural Network (DNN) are multiple layers of neurons connected to each other by trainable weights. The main objective of this thesis was to evaluate how the three input arguments - data size, training time and neural network structure – affects the accuracy of Deep Neural Networks pattern recognition; also an evaluation of how the DNN performs compared to the statistical ML method, Naïve Bayes, in the form of prediction accuracy and complexity; and finally the viability of the resulting DNN as a case manager. Results show an improvement of accuracy on our networks with the increase of training time and data size respectively. By testing increasingly complex network structures (larger networks of neurons with more layers) it is observed that overfitting becomes a problem with increased training time, i.e. how accuracy decrease after a certain threshold of training time. Naïve Bayes classifiers performs worse than DNN in terms of accuracy, but better in reduced complexity; making NB viable on mobile platforms. We conclude that our developed prototype may work well in tangent with existing case management systems, tested by future research.

  • Johansson, Marcus
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Systems and Technology.
    Dashboard: Ett program som ska underlätta felsökning2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The goal of this investigation has been to answer the questions “Which graphs should be used to display a special type of information?”, “What information does a company need to know that a server has gone down?” and “How should the layout of the developed program look to be called easy to understand and nice to use?”. The investigation was helped by the use of user-interviews and information that was collected during meetings. Part of the work was also the development of a prototype of a so called “dashboard” where functions where tested. These tests were then used to find out if the information was showed in a suitable manner. The information gained from these earlier tests has then been compiled into a result which shows that it is important to use y-over time graphs to show information over time. Fraction based information such as pro- cents are best showed with a filling graph, such as the speedometer graph. The second question was easily answered with a simple questionnaire. The result of this questionnaire showed that it was important for companies to know how much of the servers resources was used and how much data that was sent and received. Regarding the last question, the only notable result was the fact that the UI of the prototype was to light. This resulted in a color change for the UI to the darker spectrum.

  • Turunen, Maria
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Chemical Engineering.
    Hållbar uppvärmning: Vilket är det mest hållbara alternativet för uppvärmning av en nybyggd villa i Östersunds tätort?2019Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The purpose of this report is to compare different types of heatingsystems for newly built houses in Östersund. The heatingsystems of the report is exhuast air heatpump, air/water heatpump, ground source heatpump, exhaust air heatpump in combination with district heating and pellet boiler. The comparison is based upon sustainibility and its three dimensions, economy, ecological and social sustanibility. The foundation that the comparison rely on is five different future scenarios with varying mixes of sources for electricity and includes electricity prices as well. The enviromental impact is based on the different sources of energy that is used in each scenario and is measured in carbondioxide equivalents CO2eq.

    The results are based on the three components of sustainability, economic, ecological and social sustainability. The economic part includes installation costs, purchase price, interest, operation costs and for the pellet boiler it includes the cost of building a pellet storage and for the ground source heat pump the cost of drilling is included.

    The conclusion of this report is that the ground source heat pump has the lowest environmental impact, the lowest operating cost regardless of the scenario and lifestyle and the second lowest total cost, which means that it meets the criteria for sustainability of the report

  • Forsström, Stefan
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Systems and Technology.
    Blockchain Research Report2019Report (Other academic)
    Abstract [en]

    This research report outlines the current research into blockchain technologies as of December 2018. Starting with an overview of the blockchain technology to introduce the theory. To then follow with deep looks into the different aspects of blockchain technologies, investigating the research articles and current state of work in these area, including the forefront of the research frontier. As well as existing blockchain products, an outlook on the future, conclusions that can be drawn from this study. With the intent to both create understand of the technologies, as well as inspire further research work and identifying potential knowledge gaps.

  • Phadatare, Manisha R.
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences. Deemed Univ, Maharashtra, India.
    Patil, Rohan
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Blomquist, Nicklas
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Forsberg, Sven
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Örtegren, Jonas
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Hummelgård, Magnus
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Meshram, Jagruti
    Deemed Univ, Maharashtra, India.
    Hernández, Guiomar
    Uppsala Univ, Uppsala.
    Brandell, Daniel
    Uppsala Univ, Uppsala.
    Leifer, Klaus
    Uppsala Univ, Uppsala.
    Sathyanath, Sharath Kumar Manjeshwar
    Uppsala Univ, Uppsala.
    Olin, Håkan
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Silicon-Nanographite Aerogel-Based Anodes for High Performance Lithium Ion Batteries2019In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 9, article id 14621Article in journal (Refereed)
    Abstract [en]

    To increase the energy storage density of lithium-ion batteries, silicon anodes have been explored due to their high capacity. One of the main challenges for silicon anodes are large volume variations during the lithiation processes. Recently, several high-performance schemes have been demonstrated with increased life cycles utilizing nanomaterials such as nanoparticles, nanowires, and thin films. However, a method that allows the large-scale production of silicon anodes remains to be demonstrated. Herein, we address this question by suggesting new scalable nanomaterial-based anodes. Si nanoparticles were grown on nanographite flakes by aerogel fabrication route from Si powder and nanographite mixture using polyvinyl alcohol (PVA). This silicon-nanographite aerogel electrode has stable specific capacity even at high current rates and exhibit good cyclic stability. The specific capacity is 455 mAh g−1 for 200th cycles with a coulombic efficiency of 97% at a current density 100 mA g−1.

  • Beganovic, Nejra
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design.
    Moulik, Bedatri
    Amity University.
    Ali M., Ahmed
    University of Duisburg-Essen.
    Söffker, Dirk
    University of Duisburg-Essen.
    Lifetime Model Development for Integration in Power Management of HEVs By Terms of Minimizing Fuel Consumption and Battery Degradation2019In: Proceedings of the Annual Conference of the PHM Society 2019, PHM Society , 2019, Vol. 11, p. 1-8, article id 784Conference paper (Refereed)
    Abstract [en]

    Along with increasingly frequent use of electric and hybrid electric vehicles, the constraints and demands placed on them become stricter. The most noticeable challenge considering Hybrid Electric Vehicles (HEVs) is to provide an optimal power flow between multiple electric sources alongside provided as less as possible aging of energy storage components. To provide efficient battery usage with respect to battery life, it becomes unavoidable to develop battery lifetime models, which not only reflect the State-of-Heath (SoH) but also allow battery lifetime prediction. The lifetime-oriented battery models have to be integrated into power management. To be used efficiently and to provide optimal power split ensuring mitigation of battery degradation without sacrificing desired power consumption, accurate modeling of battery degradation is of utmost importance. This implies that gradual battery degradation, which is directly affected by applied loading profiles, has to be monitored and used as additional control input. Moreover, the lifetime model developed in this case has to provide model outputs also in the timeframe of power management. In this contribution, a machine state-based lifetime model for electric battery source was developed. In this particular case, different degradation states as well as machine state transitions are identified in accordance with current operating conditions. Here, the change in charge / discharge rate (C-rate), overcharging / undercharging of the battery (depth-of-discharge), and the temperature are taken into consideration to define machine model states. The End-of-Lifetime (EoL) is defined as the deviation between nominal and current ampere-hour (Ah) throughput. The proposed machine state-based lifetime model is verified based on existing battery lifetime models using simulation setup. The developed lifetime model in this way serves as a prerequisite for its integration into power management with an aim to provide the trade-off between aforementioned conflicting objectives; fuel consumption and battery degradation.

  • Ali M., Ahmed
    et al.
    University of Duisburg-Essen.
    Moulik, Bedatri
    Amity University.
    Beganovic, Nejra
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design.
    Söffker, Dirk
    University of Duisburg-Essen.
    A State-of-Health-Oriented Power Management Strategy for Multi-Source Electric Vehicles Considering Situation-Based Optimized Solutions in Real-Time2019In: Proceedings of the Annual Conference of the PHM Society 11 (1), Scottsdale, Arizona, USA: PHM Society , 2019, Vol. 11, p. 1-10, article id 783Conference paper (Refereed)
    Abstract [en]

    This paper presents a novel situation-based power and battery health management strategy for fuel cell vehicles. In such hybrid powertrains, the synergy role of batteries is essential to minimize overall power consumption and maintain higher electrical efficiency of the fuel cell. On the other hand, lifetime degradation of the battery is associated with the recurrent charging / discharging cycles. The proposed power management strategy addresses the trade-off between these contradictory objectives. Vehicle states in each situation are defined in terms of driver-related identification parameters (power demand and speed) corporately with powertrain related ones (on-board battery's state of charge). Optimal power handling solution for each situation is searched offline considering different optimization criteria: range extension, lifetime maximization, or power consumption minimization. A weighted fusion of these optimized solutions can be implemented online based on desired driving strategy, leading to situation-based optimized solution. This contribution aims to provide flexible power handling options meeting performance requirements (energy efficiency and driveability) without scarifying battery life. Simulation tests using different driving cycles are conducted for evaluation purpose.

  • Norgren, Robert
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Ecotechnology and Suistainable Building Engineering. Ragn-Sells AB, Timrå, Sweden.
    Jonsson, Anders
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Ecotechnology and Suistainable Building Engineering.
    Björkqvist, Olof
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Chemical Engineering.
    Bio-sludge from the pulp and paper industry as feed for black soldier fly larvae: A study of critical factors for growth and survival2019In: Waste and Biomass Valorization, ISSN 1877-2641, E-ISSN 1877-265XArticle in journal (Refereed)
    Abstract [en]

    Pulp and paper bio-sludge (PPBS) has low economic value and is therefore often composted or incinerated. The purpose of this work is to evaluate the feasibility of using PPBS to breed black soldier fly (Hermetia illucens) larvae (BSFL), so improving resource efficiency and supplying protein and fat to the animal feed market. BSFL were reared on PPBS in a climate chamber on a laboratory scale in order to assess nutrient deficiency, inhibition and whether the BSFL recycle the PPBS well or not. The PPBS used came from a chemi-thermomechanical pulp/groundwood pulp mill. The effect of supplementing nutrient solution added either into the PPBS or as a free liquid surface were studied. Prepupae dry weight, survival rate until prepupae stage and residual dry PPBS were measured. The addition of reference diet leachate into the PPBS did not have a significant impact on the weight of the prepupae (2.0 mg) but the survival rate was significantly higher (16.0 %). On the other hand, the addition of reference diet leachate as a free liquid surface had a significant impact on both the weight of the prepupae (4.8 mg) and the survival rate (25.7 %). The bio – conversion and PPBS – reduction was as best 0.4 % and 3.2 % respectively. This study has proven that the nutrients in PPBS are not readily available to the larvae. Addition of reference diet leachate increase the survival rate which opens up for possibilities of co-digestion. However, it is clear that under the tested conditions, BSFL is not recycling PPBS well and BSFL as a method for recycling of PPBS need further research.

  • Bäckström, Ingela
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Quality Management and Mechanical Engineering.
    Ingelsson, Pernilla
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Quality Management and Mechanical Engineering.
    Mårtensson, Anna
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Quality Management and Mechanical Engineering.
    Slutrapport ”Resultatstyrning för medborgarnytta”: Ett samverkansprojekt mellan Sundsvalls kommun och Kvalitetsteknik vid Mittuniversitetet2019Report (Other (popular science, discussion, etc.))
  • Perstadius, Carina
    Mid Sweden University, Faculty of Human Sciences, Department of Humanities and Social Sciences.
    The overturn of the resurrection – a new reading of The treatise on the resurrection.: The Valentinian rejection of realised eschatology in Nag Hammadi codex 1,42019Independent thesis Advanced level (degree of Master (One Year)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    “The Treatise on the resurrection” is a Coptic translation of a Greek source text that not is preserved. The text belongs to the Nag Hammadi codices. The text is probably produced during the second century. In this thesis, the text will be placed in the Valentinian context, and then as the Valentinianism is presented in codices 1 and XI.1. The research object for the thesis is an examination of the concept “resurrection”, ἀνάστασις. The method is the author-intentional theory of meaning; the thesis focuses on the intents of the author and not the reader´s perspective. The analysis is based on the Coptic source text. A new translation with comments will also be presented. Scholars have unanimity presumed that the text proclaims a realised eschatology. However, from a Valentinian point of view, there is no sustainable evidence for this postulation. The text can also refer to a future “resurrection” with an intermediate state in the spiritual body of the Saviour. The author redefines the sense and meaning of “resurrection”.

  • Johansson, Helena
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Mathematics and Science Education.
    Oskarsson, Magnus
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Mathematics and Science Education.
    Nyström, Peter
    NCM, Göteborgs Universitet.
    Fysikbegreppets flyktighet: En konsekvens av kursplaneförändringar?2019In: Från forskning till fysikundervisning: Bidrag från konferensen 10-11 april 2018 i Lund arrangerad av Nationellt Resurscentrum för Fysik / [ed] K. Stolpe, G. Höst, & A. Larsson, Linköping, Sverige: Linköping University Electronic Press, 2019, p. 33-46Conference paper (Refereed)
    Abstract [sv]

    TIMSS Advanced är en internationell studie om gymnasieelevers kunskaperi avancerad matematik och fysik. Studien har genomförts tregånger, 1995, 2008 och 2015, och Sverige har deltagit alla tre gångerna.Resultaten från senaste studien visade att svenska gymnasieeleverpresterade bättre i matematik men sämre i fysik jämfört med resultatenfrån 2008. Normalt brukar prestationerna i matematik och fysikföljas åt och det är därför intressant att undersöka tänkbara orsakertill de försämrade fysikresultaten. Resultatet visar för det första på försämraderesultat på uppgifter som tidigarelagts i undervisningen närde nya ämnesplanerna i fysik infördes 2011 och för det andra på försämraderesultat på uppgifter som mäter begreppsbildning i fysik.Detta kan tyda på att eleverna hade glömt områden som behandlades iundervisningen året innan provet gick, men kan också tyda på att elevernaskunskaper var alltför ytliga. Slutsatsen blir att man tydligarebör studera vad som händer när kurser och kursinnehåll förändras.

  • Johannesson, Anita
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Design.
    Två arbetsbeskrivningar av hur man stoppar om en nyrokoko soffa: Traditionella och moderna stoppningstekniker2018Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Denna uppsats är en processbeskrivning i hur man stoppar om en möbel som i sitt ursprung var stoppad på traditionellt vis. Uppsatsen visar med hjälp av beskrivningar och bildar i genomförande delen, processen av hur man stoppar om en rokokosoffa med både traditionell och modern stoppningsteknik. Vilka material som är typiska för dom olika stoppningsmetoderna och vilka materialval jag har gjord går jag närmare inpå i denna del. Efter genomförande delen med processbeskrivningarna ser jag närmare på skillnaderna mellan de två stoppningsmetoderna i form av materialkostnader, arbetstid och hållbarhet. Sist kommer et avsnitt med resultat av det föregående och avslutningsvis en reflektion av processbeskrivningen och resultatet.

  • Lundqvist, Robin
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Design.
    Parkettläggning: En studie i dekorativ parkettläggning2018Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

    Den här uppsatsen handlar om tillverkningsprocessen av vad författaren har valt att kalla för ludvigkuber till delar i en gesällmöbel. Ludvigkuber är ett illusionsmönster av fanerbitar som bildar tredimensionella kuber. Mönstret har sitt ursprung från bland annat antikens Grekland men blev populärt under Ludvig XIV:s regeringstid.

    Syftet med uppsatsen är att undersöka tillverkningsprocessen av en traditionell metod och jämföra denna med en modern metod för att fastställa vilken av dessa som lämpar sig bäst vid tillverkningen av delar till en gesällmöbel.

    I uppsatsen beskrivs tillverkningen och användandet av två olika jiggar samt för-och nackdelar med dessa.

    Resultatet visar på fördelar med att använda sig av den moderna metoden just i det här fallet, men att den klassiska metoden med lite mer efterforskning och justeringar skulle lämpa sig att använda även till detta ändamål.

  • Zander, Niklas
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Design.
    Rokokorummet2018Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

    Detta arbete består av två delar, en teoretisk och en praktisk.

    I det teoretiska arbete så studeras ursprunget och idén bakom rokokorummets gestalt, samt när i tiden denna gestalt uppenbarade sig.

    I det praktiska arbetet så undersöks i vilken utsträckning kopparstick och mönsterböcker kan användas som förlagor vid tillverkning av rokokoornamentik.

    Genom det undersökande arbetet så har följande resultat framkommit: Rokokorummet tar sitt mest karaktäristiska utryck mellan perioden år 1730 till 1750. Dess ursprung står att finna i de antika stilideal vi kan se ta plats inom inredningsarkitekturen under renässansen. Idén bakom rokokorummets gestalt är en total motsättning till de antika tektoniska strukturerna samt till barockens scenografiska karaktär. Denna unika scenografiska gestaltningsidé präglas av en naturromantiks karaktär, i en värld fjärran från krav och förpliktelser.

    Resultatet från undersökningen kring hur vida det går att tillverka rokokoornamentik utifrån kopparstick och mönsterböcker pekar på att det i allra högsta grad är möjligt. I den studie av befintlig rokokoornamentik som gjorts i detta arbete så har ingen gemensam nämnare för hur rokokoornamentiken i detalj skurits stått att finna. Däremot så är mångfalden i utförandet av rokokoornamentiken så pass stor, så oavsett hur den individuella bildhuggaren i detalj har skurit ornamentiken som avbildas i kopparsticket/mönsterboken så har detta resultat fallit innanför ramarna för vad som, åtminstone idag, anses vara rokoko.

  • Sundberg, Jenny
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Design.
    Nykonstruktion 1700-tals möbel: Hörnskåp2018Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Uppsatsen beskriver nytillverkning av ett 17/1800-tals hörnskåp i gustaviansk stil. Den beskriver tillverkningsprocessen, problem som uppstått på vägen och hur de löstes. Det ursprungliga utseendet har bevarats så långt som möjligt. Konstruktionen har anpassats efter träets rörelser, bland annat genom spår för bakstycket istället för sammanfogning med naror och gradspår för hyllbärarlister istället för spik. En dold låda i skåpets nedre del har byggts för att ta till vara ett oanvänt utrymme.

  • Storvik, Matilda
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Design.
    Att tillverka jalusi med parkettläggning: och faktorer som styr jalusins förmåga att svänga snävt2018Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Den här rapporten behandlar de frågor som uppkommit i samband med tillverkningen av jalusierna till min examensmöbel. Den beskriver olika sätt att tillverka jalusier med focus på jalusier med parkettläggning. Även vilka faktorer som påverkar jalusins förmåga att svänga snävt beskrivs. För att komma fram till ett väl fungerande tillvägagångssätt har olika tester genomförts. Resultaten visar att konstruktionen på jalusin till stor del baseras på de olika krav som den specifika jalusin måste ha, när det kommer till utseende i kombination med funktionalitet. Lamellernas profil och storlek men även dragkraftens placering i jalusin är faktorer som påverkar jalusins svängbarhet. Olika metoder att skära isär lamellerna efter att faneren applicerats prövades och det som slutligen visade sig fungera bäst var att skära med ritsmått.

  • Persson, Myra
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Design.
    Dokumentskåp: Processen bakom2018Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Denna uppsats beskriver tankearbetet bakom formgivningen av en möbel ägnad till pappersförvaring. Den går igenom historiskt, standarder och estetiska uttryck vilket ger grund till möbeln.

    Jag beskriven varifrån jag hämtat inspiration och avslutar med att utvärdera det faktiska resultatet av examensprojektet.

  • Brännström, Victoria
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Design.
    Rekonstruktion Regnaholm: En hantverkssmedja där tre väggfält står värd för tradering av hantverk, tradition och tankekraft2018Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    I den här uppsatsen beskriver jag hur ett byggnadsvårdsuppdrag kan fungera som plattform för förmedling och kunskapsutbyte av kulturhistoria, materialkunskap och metod. Uppsatsen baseras på det praktiska arbetet med att rekonstruera tre väggpartier till stora sovkammaren i det brandhärjade Regnaholms herrgråd. Jag har genomfört projektet i samarbete med Marwa Hussei och Rola Hamza.

    Uppsatsen beskriver det metodiska arbete som väggarnas uppbyggnad innebar, att bygga spännramar, spänna linneväv, limma lumppapp, kredera ytan, måla ytskiktet och slutligen måla dekor och utifrån det redogöra jag för den kunskap som vi delat, om våra olika kulturer, den samtida och dess historia, om material och metoder som används och har använts samt hur besluten kring material och metod som väggpartierna slutligen utfördes med. Den redogör även för de likheter vi fått syn på och som härigenom fått en konkret förankring, till exempel hur begrepp, former, metoder har inspirerat och gett avtryck i svenska formuttryck och om kulturella likheter och olikheter som vi erfarit under projektets gång. Uppsatsen baseras på det dagliga arbetet dokumenterat genom foto, dagboksanteckningar samt diskussioner och egna reflektioner. Avslutningsvis summeras de resultat projektet medför som plattform för integration samt en diskussion om dessa värden.

  • Dahl, Annika
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Design.
    Tillverkning av pardörr i ramverksteknik: Efter äldre förlaga och anpassning för ny plats2018Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Entrén till en före detta bagarstuga är otät och står inte emot väder och vind. Syllstocken under dörrkarmen har en pågående fuktskada på grund av att vattenavrinningen inte fungerar som den ska. Fuktskadans omfattning har

    undersökts på platsen och åtgärd i form av halvsulning föreslås samt att ny karm med droppnäsa ska installeras.

    I rapporten beskrivs hur en ny utåtgående pardörr tillverkas utifrån en förlaga. Tre pardörrar har valts ut som förlagor och jämförs stil-, konstruktion- och funktionsmässigt. En av dörrarna valdes bort på grund av sämre konstruktion. På den dörr som valdes som huvudsaklig förlaga stämde höjdmåtten med den nya dörren och fyllningarnas indelning behövde inte ändras. Oavsett vilken förlaga som valdes fick bredden justeras. Tillverkningen av dörrbladen genomfördes huvudsakligen med snickerimaskiner. För vissa moment användes handverktyg. Den största svårigheten i tillverkningen var att få bra passform vid profilernas möten i

    ramverket. Dörren ytbehandlas med linoljefärg i en kromgrön kulör. Kulören har valts för att stämma in med övriga dörrar på fastigheten. Med nya utåtgående dörrblad med stänglist och överljus gör entrén mer vädertät och farstun får ett dagsljusinsläpp. På detta sätt kan de gamla

    inåtgående dörrbladen sitta kvar och därmed bevaras utan att ändras. Vill man återfå det ursprungliga utseendet är det förhållandevis enkelt att montera ner de nya dörrbladen.

    Ur ett mer strikt byggnadsvårdstänk hade byggnadens ålder haft större betydelse med avseende på val av förlaga. Eftersom jag inte fick fram uppgifter om detta har dörrens konstruktion och funktion fått större betydelse.

  • Thornström, Magnus
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Design.
    Spiktillverkning: En studie i spiktillverkning och dess historia2018Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Denna uppsats handlar om framställning av smidd spik, dess olika sorter och spikens historia.

    Arbetet är uppdelat i en praktisk del och en teoretisk del.

    Den praktiska undersökningen handlar om hur den smidda spiken fram-ställs samt hur dess verktyg och dess funktioner används i ett praktiskt arbete.

    Spiken i ett byggnadsvårdsarbete bör vara historiskt korrekt i förhållande till byggnaden, det vill säga vanligtvis handsmidd. Därför måste spik tas fram enligt gammal metod med hjälp av hammare, städ och ässja.

    I den teoretiska delen undersöks fakta om smidd spik i historien och i byggnadsvården, samt tidigare och senare alternativ. Det finns mycket att hämta i litteratur och genom folkmun från smeder.

  • Gajicki, Sakarja
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Design.
    Handhyvling av fönsterkarm, ramverkspaneler och foder: Till Regnaholms herrgård2018Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Denna uppsats handlar om att utföra byggnadshantverk med handverktyg. Syftet är att få erfarenhet av en arbetsprocess som har varit, men idag inte längre är en självklarhet för snickare. Hantverket som utförs är delar av ett fönster till Regnaholms herrgård i Östergötland och innefattar karm, ramverkspaneler i nischen samt foder. I uppsatsens genomförandekapitel, vilket är den mest omfattande delen av uppsatsen, beskrivs tillverkningsprocessen. Ämnen som i övrigt är intressanta för fönsterhantverk kommer inte behandlas, som exempelvis fönsterbågar, glasning, kittning, ytbehandling och beslag.

    I resultatkapitlet redogörs för den litteratur som funnits att tillgå och vilka eventuella svårigheter som uppstått i användandet av den. Litteratur har funnits till alla moment förutom två. Detta gällde sammansättningen av fönsterkarmen vilken istället gjordes efter egna erfarenheter och ramverkspanelen vilken kunde göras efter en beskrivning av en ramverksdörr; här bedömdes principen för dessa två densamma.