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Title: Analysis of running technique and efficiency when using Nike Air Zoom Alphafly shoes. Objectives: The main goal is to identify possible changes in selected physiological parameters and biomechanics of running when using Nike Air Zoom Alphafly shoes compared to standard running shoes. Methods: A 3D treadmill (H/P Cosmos Gaitway II S, Germany) was used in the analysis of running biomechanics. For the analysis of physiological parameters, the Metalyzer device was used within the spiroergometric examination of the run. The Borg scale was used to analyze the subjective assessment of the load. A paired T-test of Excel software was used to process the results. Results: The results of the work partially show a change in the biomechanics of running. A statistically significant difference was recorded at all speeds (15 km/h, 18 km/h, 21 km/h) in loading rate (p15 = 0,003; p18 = 0,000; p21 = 0,001) and time to impact peak (p15 = 0,017; p18 = 0,022; p21 = 0,003). At a speed of 15 km/h, an additional difference in running cadence (p = 0,044) was noted. The results show a statistically significant change in the economics of running all measured parameters, in oxygen intake converted to kilograms of weight (p = 0,003), minute ventilation (p = 0,000), respiratory rate (p = 0,000), respiratory coefficient (p...

The wastewater- and sewage distribution network is a critical aspect for maintaining a socialandenvironmental well-being. However, in the latest time, many failures (such as leakages) haveoccurred due to poor conditions in the wastewater-infrastructure, causing several consequencessuch as damage to the environment or pose health hazards to the public. This study is dividedinto three parts. Part one compares five different sewage inspection technologies: Closed-CircuitTelevision (CCTV), Zoom Cameras, Digital Scanning, SONAR and Electro Scanning with thepurpose of identifying a new system that Stockholm Vatten & Avfall (SVOA) should considerimplementing. Part two goes through the inspection procedure that SVOA applies, andrecommendations are concluded as to how the process can be optimized. Part three coversessential aspects that should be taken into account before investing in a new technology. Theresearch methodology involves collecting data from literature, internal reports from SVOA, andconducting interviews with supervisors and field workers. The main finding is that SVOA shouldcontinue with the current approach that the utility is using because the current data found in thecurrent literature is too insufficient and not too strong which makes it not convincing to investinto a new technology. On the other hand, the collected data about the technologies can beconsidered whenever the approach is moving towards a proactive approach.

When circumstances for university libraries changed drastically due to the covid-19 pandemic in 2020, video mediated reference service was used to maintain availability for library users. Many libraries used Zoom for this service. This thesis aims to investigate librarians' reference work via video calls, through a case study of a university library in Sweden. The study gathers librarians' experiences of communicating with users via Zoom, to gain knowledge about the work's characteristics and to discover possible strategies for managing video call services, and their inherent strengths and weaknesses, in a university library context. The study is based on six semi-structured interviews with university librarians who work at the Zoom desk. All respondents have many years of experience of working at a traditional reference desk, which enables valuable comparisons between the two working methods. The results reveal several advantages of Zoom, one of the biggest being the separate and undisturbed space that the Zoom desk represents. As a result of that, the respondents point out that Zoom has come to be used for in-depth reference service. By analyzing the interviews through the sociologist Erving Goffman’s theoretical framework of social interaction, and theories of social presence, we also hope to increase the understanding of the dynamics in video mediated communication.

In response to the global Covid-19 pandemic, universities across the world moved coursework online andfrequently used Zoom videotelephony software to replicate the experience of learning in a classroom. While this platform supported certain aspects of the traditional classroom, such as immediacy of responses and the facilitation of social interactions, learning via Zoom also differed in various ways from the familiar classroom experience. Although there has been considerable research on online learning, most studies focused on an asynchronous design and interaction. Thus, the understanding of learning within synchronous, video-mediatedplatforms, such as Zoom, is nascent. In this study, the data was derivedfrom a focus group with eight university students from the United States that was conducted over Zoom. Using content analysis, the transcripts of the focus group's interaction yielded four themes: Zoom Challenges, Zoom Benefits, Faculty Proficiency, and Student Learning Experiences. Cameras, a distinguishing feature of Zoom, could strengthen engagement, yet they also heighten anxiety for some andfatigue for most users. However, when those challenges were mitigated and the benefits harnessed by faculty informed about how to support student learning, students experienced a deepened sense of connection to their peers, the faculty, and their learning. Family science educators who recognize the strengths and limitations of this platform have the opportunity to teach more effectively and support their students' socio-emotional learning and well-being.

Jag har beskrivit och diskuterat de möjligheter och utmaningar som fjärrundervisning har inneburit för mig och mina sångstudenter under Coronapandemin. Mitt syfte var att fånga studenternas uppfattningar om huruvida traditionellt platsbunden, gehörstraderad sångundervisning var utbytbar mot nätbaserad synkron undervisning. Jag ville veta hur och om undervisningsformen har påverkat studenternas motivation – lust att lära. Undersökningen bygger på studenternas egna reflektioner efter två fjärrbaserade kurser i folksång på plattformarna Zoom och Aloha. Resultatet visar att variation och musikaliskt fokus, flexibelt lärande, enskild handledning och feedback bidrog både till lust att lära och motiverade till självstudier. / Högskolepedagogisk kurs 2 på KMH.

In educational settings, gender equality can be a measure of quality and lay the foundation of a more equal society. Due to the Covid- 19 pandemic, many universities have moved their education online and interaction between students have been limited to platforms for video meetings. Previous research has shown differences in how the listener perceives the apportionment of talk dependent on the speaker’s sex. It was shown that both genders overestimated women. This study examines whether the overestimation still persists and how perceptions of speech distribution are perceived in a virtual environment. The study was conducted on the platform Zoom with several discussion groups, consisting of male and female undergraduate students. Without knowing the purpose of the study, the participants discussed study-related questions in a recorded video meeting. After the discussion, the subjects filled out a questionnaire to estimate the apportionment of talk within the group. Their answers were then compared with the data from the recordings. Overall, the participants’ perceptions of the apportionment of talk were close to the actual distribution. The results only showed small indications that men and women perceive the apportionment of talk differently. This is because men overestimated both themselves and other men slightly more than women did. Women did not tend to over- or underestimate one gender more than the other. However, something that seemed to have a greater impact on the perception is the role the speaker took in the group dynamics. / I utbildningssammanhang kan jämställdhet vara ett kvalitetsmått samt lägga grunden till ett mer jämlikt samhälle. Till följd av pandemin Covid-19 har många universitetsutbildningar tvingats flytta sin undervisning online och interaktionen mellan studenter har begränsats till plattformar för videomöten. Tidigare forskning har visat på att det finns skillnader i hur lyssnaren uppfattar talfördelning beroende på talarens kön. Det påvisades att båda könen överskattade kvinnor. Denna studie undersöker om överskattningen fortfarande kvarstår samt hur man uppfattar talfördelning i en virtuell miljö. Studien genomfördes på plattformen Zoom med flera diskussionsgrupper, bestående av manliga och kvinnliga studenter. Deltagarna visste inte på förhand vad som skulle undersökas utan blev tilldelade studierelaterade diskussionsfrågor i ett inspelat videomöte. Efter diskussionens slut fick de uppskatta hur mycket var och en i gruppen hade talat. Svaren jämfördes sedan med data från inspelningarna. Sammantaget låg deltagarnas uppfattning om talfördelningen nära den faktiska fördelningen. Resultatet visade endast på små tendenser till att män och kvinnor uppfattar talfördelning olika. Detta då män överskattade både sig själva och andra mäns talfördelning något mer än vad som gick att utläsa för kvinnor. Kvinnor tenderade inte att över- eller underskatta det ena könet mer än det andra. Något som däremot verkade väga in tyngre i uppfattningen var vilken roll talaren tog i sammanhanget.

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Under 2019 uppkom en pandemi som fick en stor påverkan på mediebolag och deras anställda. Denna studie studerar hur mediebolag använder kommunikationsverktygen Zoom och Teams vid digitala förändringar inom verksamheten under Covid-19. Studien innehåller digital transformation, beteendeteori samt hur medarbetares arbetssituation påverkas av att arbeta på distans. Med hjälp av kvalitativa intervjuer med ledare och medarbetare gav det en inblick inom ämnet. Studiens slutsats visar på hur mediebolags ledare och medarbetare påverkas av distansarbete samt vilken påverkan kommunikationsverktygen Zoom och Teams har. Teknisk förmåga, en fungerande kommunikation för samtliga parter och en positiv inställning till förändring är avgörande för en lyckad digital implementering. Valet av kommunikationsverktyg beror främst på en strävan efter kundnöjdheten, kommunikationsverktygets funktioner och säkerhet.

The task of thermal management in electrical systems has never been simple and has only become more difficult in recent years as the power electronics industry pushes towards devices with higher power densities. At the Center for Power Electronic Systems (CPES), a new approach to power electronic design is being implemented with the Integrated Power Electronic Module (IPEM). It is believed that an IPEM-based design approach will significantly enhance the competitiveness of the U.S. electronics industry, revolutionize the power electronics industry, and overcome many of the technology limits in today's industry by driving down the cost of manufacturing and design turnaround time. But with increased component integration comes the increased risk of component failure due to overheating. This thesis addresses the issues associated with the thermal management of integrated power electronic devices. Two studies are presented in this thesis. The focus of these studies is on the thermal design of a DC-DC front-end power converter developed at CPES with an IPEM-based approach. The first study investigates how the system would respond when the fan location and heat sink fin arrangement are varied in order to optimize the effects of conduction and forced-convection heat transfer to cool the system. The set-up of an experimental test is presented, and the results are compared to the thermal model. The second study presents an improved methodology for the thermal modeling of large-scale electrical systems and their many subsystems. A zoom-in/zoom-out approach is used to overcome the computational limitations associated with modeling large systems. The analysis performed in this paper was completed using I-DEAS©,, a three-dimensional finite element analysis (FEA) program which allows the thermal designer to simulate the affects of conduction and convection heat transfer in a forced-air cooling environment. / Master of Science