Dissertations / Theses on the topic 'DIFFERENT ANGLES'
To see the other types of publications on this topic, follow the link: DIFFERENT ANGLES.
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 dissertations / theses for your research on the topic 'DIFFERENT ANGLES.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
1
Noll, Steven. "From far more different angles institutions for the mentally retarded in the South, 1900-1940 /." Gainesville, FL, 1991. http://www.archive.org/details/fromfarmorediffe00noll.
Full text
2
Yan, Zhishan. "Shear and Compression Strength of Cold-formed Steel Clip Angles Subjected to Different Screw Patterns." Thesis, University of North Texas, 2017. https://digital.library.unt.edu/ark:/67531/metadc1062892/.
Full textAbstract:
This thesis presents experiments and numerical analysis of the cold-formed steel clip angle in three different limit states which are shear, compression, and combination of the screw connection. A previous cold-formed steel clip angle test program (which is Phase 1) developed design methods for clip angle. Therefore, the object of this thesis is to further investigate the behavior and design methods of loading-bearing cold-formed steel clip angles under different screw pattern. For each limit state, a test program was conducted to investigate the behavior, strength, and deflection of the clip angle. The test result were compared with previous CFS clip angle design method. Amending existing CFS clip angle method were developed by each of the four limit states studied in this project.
3
Shu, Wesley Szu-Way. "From different angles to solve the puzzle: Macroeconomic and microeconomic analyses of information technology productivity." Diss., The University of Arizona, 1998. http://hdl.handle.net/10150/282679.
Full textAbstract:
This dissertation addresses one of the most academically intriguing issues in MIS, so-called "IT productivity paradox" which describes the failure of detecting positive contribution in productivity statistics by Information Technology investment while our economy has voraciously and restlessly spent money on them for the last few decades. Recent studies are showing startling contrast with the previous ones and there seems big discrepancy between firm level and national economy analyses. In order to unravel the paradox and the discrepancy observed. The author provides theoretical and methodological discussion and the empirical investigation on the methodologies used by previous research and conducted both firm-level and macro-economic analysis. The background investigation above shows that the recent studies defying the decades-old IT paradox do not pass rigorous methodological test based microeconomic production theories. The firm level analysis confirms our conjectures that the highly positive contributions reported by the recent studies are not reliable and thus shall not be read without caution. Our claim is supplemented by simulation studies as well. In addition to the microeconomic analysis, macroeconomic level study on major developed countries has been conducted. An emphasis is placed at the impact of information technology on the structural change of employment, and at the impact of the structural change on productivity. The potential contribution of this dissertation includes: (i) Using the same data set the prior studies used, we contrasts findings and methodologies with those in the previous studies. It calls for very careful attention to the methodology before we applaud for "positive" findings. (ii) It also provides a rare study in MIS on economic value of IT investment in macroeconomics and international contexts.
4
Hardman, Kristi Dawn. "Hearing meter from different angles : interactive vocal meter and hypermeter in selected songs and their covers." Thesis, University of British Columbia, 2016. http://hdl.handle.net/2429/57460.
Full textAbstract:
A vocal melody is a setting of poetry to musical rhythms and pitches. The poetry and the musical melody have distinct accentuation patterns, yet as musicians we too often only analyse the musical events of a vocal melody in order to determine its rhythmic structure and meter, while ignoring the meter of the poetic text. This thesis examines how the meter of the poetic text interacts with the meter of the musical melody to inform our overall perception of the vocal melody’s meter. Through comparison of popular songs with cover versions that adopt a different meter, it investigates how the same poetic meter interacts with different musical meters, and studies the resulting effects on vocal meter and hypermeter. The methodology can be applied to a wide range of popular music genres, so each chapter examines an original song and cover versions representing different genres.
The first chapter establishes the new methodology developed in this thesis. The concepts of poetic meter, melodic meter, and the resulting “interactive vocal meter” are introduced and applied in the analysis of three versions of Hank Williams’s “I’m So Lonesome I Could Cry.” This chapter also explores some novel ways in which we can interpret syncopations and hypermeter. Interactive vocal meter is further explored in chapter 2 through the analysis of two versions of the Beatles’ “I’ll Be Back.” The change in meter, from the 6/8 of the demo to the 4/4 of the single, offers a fascinating opportunity to study the rhetorical and musical impact of subtle changes in accentuation. The complex phrase structure of “I’ll Be Back” also introduces interesting issues and questions regarding our perception of hypermeter.
The third chapter focuses on Billie Holiday’s “Strange Fruit.” Holiday’s transformations of the poem’s unusual metric contours provide a vivid demonstration of her uniquely eloquent idiom. The vocal metric interpretation of “Strange Fruit” challenges the view that beats 1 and 3 are always strongly accentuated beats in 4/4 measures. This chapter also explores issues of rhythmic and metric transcription in connection with Lori Burn’s recent study of Tori Amos’s cover of the song.Arts, Faculty of
Music, School of
Graduate
5
Jönsson, Emil. "Pressure distributions on a valve disk at different opening angles and their impacts on the shaft." Thesis, Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-44367.
Full textAbstract:
Valves are used in the most pipe systems today. There are a lot of different valves used depending on the system. They all do have in common to withstand all possible kind of failure that might occur. Common issues are cavitation, water hammer and friction torque. Friction torque is dependent on the deflection of the valve due to the high load on the valve body, for a butterfly valve this will be the disk. The pressure distributed on the disk differ depending on the opening angle of the butterfly valve. Opening angles of 3, 15 and 30 degrees are investigated. The further the valve is opened the lower the pressure will be on the downstream side and also the total pressure on the disk is decreased. This investigation shows that the impact in terms of deflection angle is constant for the lower opening degrees but for 30 degrees of opening there is a drop in deflection angle on the shaft. This means that the shaft will absorb less force due to loading on the disk and lead to reduced friction torque. With use of the same inlet pressure the angle causing the deflection increased linearly.
6
Thipakorn, Bundit. "Defining the cross section of the fluorescence-filled capillaries from intensity profiles viewed at different angles /." free to MU campus, to others for purchase, 1996. http://wwwlib.umi.com/cr/mo/fullcit?p9720547.
Full text
7
Kombo, Rainah. "Qualitative analysis of flow patterns : two-phase flow condensation at low mass fluxes and different inclination angles." Diss., University of Pretoria, 2016. http://hdl.handle.net/2263/61303.
Full textAbstract:
A great deal of work has been conducted on in-tube condensation in horizontal and vertical smooth tubes. The available literature points to mechanisms governing two-phase condensation heat transfer coefficients and pressure drops, which are directly linked to the local flow pattern for both horizontal and inclined configurations. However, the work has been limited to flow pattern observations, heat transfer, pressure drops and void fractions for both horizontal and inclined tubes at high mass fluxes. No work has been conducted on the analysis of the observed flow patterns and the effect of temperature difference between the average wall temperature and average saturation temperature for different inclination angles at mass fluxes of 100 kg/m2.s and below. The purpose of this study is to carry out a qualitative analysis of flow patterns, and show the effect of temperature difference on the heat transfer coefficient for inclination angles from +90° (upward flow) to -90° (downward flow) at mass fluxes below 100 kg/m2.s. An experimental set-up provided the measurements for the two-phase condensation of R-143a in a smooth tube with an inside diameter of 8.38 mm and a length of 1.5 m. The mass fluxes were 25 kg/m2.s to 100 kg/m2.s, the saturation temperature was 40 °C and the mean qualities were 0.1 to 0.9. A high-speed camera was used to visually analyse and determine the flow patterns for both the inlet and the outlet of the test section. Through the results, eight flow patterns were observed: stratified-wavy, stratified, wavy, wavy-churn, intermittent, churn, annular and wavy-annular. The maximum heat transfer was observed for downward flow between inclination angles of -15° and -30°. The Thome-Hajal flow pattern map correctly predicted horizontal flow patterns, but failed to predict most of the inclined flow patterns. Various flow pattern transitions were identified and proposed for all the investigated inclination angles in this study. Finally, the heat transfer coefficient was found to be dependent on quality, mass flux, temperature difference and inclination angle.Dissertation (MSc)--University of Pretoria, 2016.
Mechanical and Aeronautical Engineering
MSc
Unrestricted
8
Bovenizer, Todd S. "An in-vitro investigation of frictional resistance of self-ligating and ceramic brackets when subjected to different ligation methods and tipping angles." Morgantown, W. Va. : [West Virginia University Libraries], 2006. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=4467.
Full textAbstract:
Thesis (M.S.)--West Virginia University, 2006.Title from document title page. Document formatted into pages; contains x, 97 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 69-76).
9
Krüger, Claudia [Verfasser], Jens [Akademischer Betreuer] Rowold, and Hartmut H. [Gutachter] Holzmüller. "Different angles on transformational leadership: its antecedents, relatives, and consequences in self and other perception / Claudia Krüger. Betreuer: Jens Rowold. Gutachter: Hartmut H. Holzmüller." Dortmund : Universitätsbibliothek Dortmund, 2013. http://d-nb.info/1112267069/34.
Full text
10
Khan, Kevin Jamil Hiroshi. "Wide Area Power System Monitoring Device Design and Data Analysis." Thesis, Virginia Tech, 2006. http://hdl.handle.net/10919/34052.
Full textAbstract:
The frequency disturbance recorder (FDR) is a cost effective data acquisition device used to measure power system frequency at the distribution level. FDRs are time synchronized via the global positioning system (GPS) timing and data recorded by FDRs are time stamped to allow for comparative analysis between FDRs. The data is transmitted over the internet to a central server where the data is collected and stored for post mortem analysis. Currently, most of the analysis is done with power system frequency.
The purpose of this study is to take a first in depth look at the angle data collected by FDRs. Different data conditioning techniques are proposed and tested before one is chosen. The chosen technique is then used to extract useable angle data for angle analysis on eight generation trip events. The angle differences are then used to create surface plot angle difference movies for further analysis.
A new event detection algorithm, the k-means algorithm, is also presented in this paper. The algorithm is proposed as a simple and fast alternative to the current detection method. Next, this thesis examines several GPS modules and recommends one for a replacement of the current GPS chip, which is no longer in production. Finally, the manufacturing process for creating an FDR is documented.
This thesis may have raised more questions than it answers and it is hoped that this work will lay the foundation for further analysis of angles from FDR data.
Master of Science
11
Morin, Gabrielle. "The Present Perfect in since-clauses : the interaction with different types of predicates." Master's thesis, Université Laval, 2020. http://hdl.handle.net/20.500.11794/66867.
Full textAbstract:
Ce mémoire est une étude sémantique ayant comme sujet l’utilisation du Present Perfect dans les constructions temporelles introduites par la conjonction since en anglais. Le Simple Past étant la forme verbale la plus fréquente dans ce type de constructions syntaxiques telles que « She has been my friend since we were at school together », le Present Perfect est tout de même parfois utilisé par les interlocuteurs de l’anglais, comme dans « I have known you since I have lived in Quebec City ». Le but de la présente étude est donc de démontrer qu’il existe une certaine corrélation entre l’utilisation du Present Perfect et les différents types d’évènements/prédicats dans ce type de construction. Pour ce faire, la catégorisation des évènements en accomplissements, achèvements, activités, et états décrite par Vendler (1957) sert de base pour classer les 527 contextes de corpus utilisés. Dans ce sens, la signification intrinsèque de chaque type de prédicat, en combinaison avec l’influence d’éléments de durée présents dans la phrase principale tels que « It’s been twenty years since… », a une influence sur quelle forme verbale entre le Present Perfect et le Simple Past est la plus fréquente dans ce type de construction pour chaque type de prédicat. Il deviendra aussi clair que l’utilisation du Present Perfect dans les since-clauses n’est pas si rare qu’on peut le croire. Cependant, il est souvent possible de le remplacer par le Simple Past, ce qui nous amène à nous questionner sur le rôle et l’utilité du Present Perfect dans les propositions introduites par since.This thesis is a semantic study of the behaviour of the Present Perfect in temporal sinceclauses. The Simple Past being the most commonly found verb form in temporal sinceclauses of the kind She has been my friend since we were at school together, there are times when speakers of English use the Present Perfect instead, such as in I have known you since I have lived in Quebec City. The purpose of this study is therefore to show a correlation between the use of the Present Perfect and the different types of events/predicates in this type of construction. To do so, Vendler’s (1957) categorization of events into accomplishments, achievements, activities, and states is used as a basis for the classification of the 527 corpus results examined in this study. In this sense, the intrinsic meaning of each type of predicate, combined with the influence of durational elements in the main clause such as It’s been twenty years since…, has an influence on whether the Present Perfect or the Simple Past is the most frequent verbal form used for each type of predicate. It will also become apparent that the presence of the Present Perfect in since-clauses is not as rare a phenomenon as one might think. However, in some cases, the Present Perfect can be replaced by its counterpart, the Simple Past, leading one to seek the reason for the choice of the Present Perfect in sinceclauses.
12
Jakobi, Tobias [Verfasser], Michael [Akademischer Betreuer] Baake, and Friedrich [Akademischer Betreuer] Götze. "Radial projection statistics: a different angle on tilings / Tobias Jakobi ; Michael Baake, Friedrich Götze." Bielefeld : Universitätsbibliothek Bielefeld, 2017. http://d-nb.info/1137624329/34.
Full text
13
Alsulaiman, Mohamad, and Najmeh Mohammadi. "Optimal Pitch Distance and Tilt Angleof PV Power Plant for Different Climate." Thesis, Högskolan Dalarna, Energiteknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:du-35528.
Full textAbstract:
Finding the optimum inter-row spacing and installation tilt for tilted or ground mounted PV systems is a big issue in designing the large-scale PV systems. Increasing the array spacing leads to higher annual generated energy because of the reduced impact of row-shading, but on the other hand, it increases costs of land purchase/lease and wiring costs. Many compromises between performance and cost should be done to design an optimum large-scaled solar plant. One of the criteria in designing of solar power plants is reducing of LCOE, which reflects the cost of every unit of generated energy. Site locations have large impacts on the optimal design of pitch distance and title angles, but such impacts have not been studied extensively in the existing studies, so it is going to bridge this research gap in this thesis. The main purpose of this research is to investigate the impact of climate conditions on the pitch distance and tilt angle for large-scale PV plant and finding the optimal pitch distance and tilt according to the least cost of production. The impact of climate and meteorological data on the self-shading loss and yield of energy are investigated through a simulation tool, which is PVsyst software here, in different tilt angles and distances between rows. The different climates can be considered by choosing site locations in different latitudes to cover all climate zones. Six cities in temperate climate, three cities in tropic climate and one city in polar climate have been selected. LCOE minimizing is a measure in finding the optimum tilt and pitch distance for a 1 MW solar system installed in different latitudes. In this study the type, size and cost of components have been assumed constant in different climate conditions. There is a wide range of variability in some economic indicators like interest rate and discount rate as well as the cost of land in different climates or even countries in the same climate; then to highlight the impacts of climate conditions on the optimal tilt and pitch distance, these parameters were assumed to be constant in this study. The results show the optimal tilt of angles increases with getting far of equator in a range between 0° and 40° to capture more direct sunlight, and the optimal raw spacing grows in further locations to equator in a range between 4 m to 11 m to reduce self- shading loss. Moreover, the best module configuration for PV arrays (portrait or landscape) can be different in different climates.
14
Kemzūra, Paulius. "Žemės dirbimo įtaka dirvožemio organinės anglies ir mikroorganizmų biomasės sankaupoms." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2014. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2014~D_20140616_130929-96499.
Full textAbstract:
Magistrantūros studijų baigiamajame darbe pateikiami dirvožemio organinės anglies, humuso, C/N santykio, mikroorganizmų biomasės anglies, dirvožemio kvėpavimo tyrimų duomenys, įvertinant skirtingus žemės dirbimo būdus skirtingais dirvožemio gylio sluoksniais. Lyginami 2009 ir 2013 metų atliktų tyrimų duomenys.
Darbo objektas – giliau karbonatingas giliau glėjiškas rudžemis, kuriame 2009 ir 2013 metais buvo žirnių (Pisum sativum L.) pasėlis, kur tirta skirtingo žemės dirbimo įtaka dirvožemio organinės anglies ir mikroorganizmų biomasės anglies sankaupoms.
Darbo metodai: eksperimentai įrengti keturiais pakartojimais. Pradinių laukelių plotas – 126 m2, apskaitinių – 84 m2. Variantai pakartojimų blokuose išdėstyti rendomizuotai. Dirvožemio kvėpavimas ir mikroorganizmų biomasės sankaupos įvertintos 2009 ir 2013 m. birželio mėn. žirnių pasėliuose. Dirvožemio organinės anglies ir mikroorganizmų biomasės sankaupoms vertinti viršutinio ariamojo Ap (0-10 cm) horizonto jungtiniai ėminiai 3 pakartojimais buvo surinkti su 2-4 cm skersmens dirvožemio grąžtu. Eksperimento variantai: tradicinis žemės dirbimas, supaprastintas žemės dirbimas, tiesioginė sėja, ekologinė žemdirbystės sistema, kur taikytas tradicinis žemės dirbimas.
Darbo rezultatai. Skirtingi žemės dirbimo būdai ir ekologinės žemdirbystės sistema, taikant tradicinį žemės dirbimo būdą, turėjo įtakos dirvožemio organinės anglies, humuso, C/N santykio, kvėpavimo ir mikroorganizmų biomasės anglies sankaupoms. Didžiausios org. C... [toliau žr. visą tekstą]The master work presents the results on soil organic carbon, humus, C/N ration, microbial biomass carbon, soil respiration in soil with different soil tillage systems in two soil depths (0-10; 10-20 cm). Results were obtained in 2009 and 2013 and presented. Object of the research – The Endocalcari-Endohypogleyic Cambisol, where in 2009 and 2013 pea crops (Pisum sativum L.) have been growing. Soil tillage impact on soil organic carbon and microbial biomass carbon pools has been investigated. Method of the research – experiments was installed in four replications. Research area – 126 m2, research plot – 84 m2. Variants in blocks were rendomized. Soil respiration and microbial biomass pools were investigated in 2009 and 2013 in June in pea crops. Experiment variants were as followed: conventional tillage, reduced tillage, no tillage and ecological soil management with conventional tillage. Research results. Different soil tillage systems and ecological soil management system with conventional tillage had impact on soil organic carbon, humus, C/N ration, soil respiration and microbial biomass carbon pools. The highest org. C, humus, microbial biomass carbon concentrations and soil respiration intensity have been found in ecological soil management system. The fertilization with siderate crop may effect it mainly. The lower soil tillage intensity influenced the increase in org. C, humus concentration in 0-10 cm soil depth. In other hand, also along with lower tillage intensity... [to full text]
15
O'Neill, Maria. "Many Strands from Different Looms: Eclecticism and Contradiction in the Works of Richard Mulcaster." Doctoral thesis, Universitat de Lleida, 2000. http://hdl.handle.net/10803/8114.
Full text
16
Pawinski, Lori. "Small School Reform in a Large Urban High School: Does it Make a Difference in Student Outcomes?" Digital Commons at Loyola Marymount University and Loyola Law School, 2007. https://digitalcommons.lmu.edu/etd/561.
Full textAbstract:
Since A Nation at Risk (1983), high schools across the United States have searched for answers to address increasing drop out rates and low student achievement. In urban areas, the large comprehensive high school is no longer addressing the diverse needs of the students it serves. The high school reform movement, beginning in 1984, set out to find solutions to solve the problems that these large urban high schools face each day. One reform is the creation of small learning communities within a large secondary school. Small learning communities are groups of teachers sharing and serving small numbers of students centered on a common theme, curriculum, and vision. These small learning communities create personalized learning environments among teachers, students, and parents to mitigate the effects of the large school on student outcomes.
The purpose of this research was to investigate one of these small learning communities in a large urban high school in Los Angeles. The study explored how this small learning community set out to implement five identified factors of small schools including: personalization, leadership, authentic curriculum, innovative pedagogy, and accountability. The results show the impact of the small learning community model on student outcomes. Through the examination of quantitative data, the study correlated improved student outcomes with the level of implementation of these five identified factors. Additionally, the study used qualitative date to reinforce the quantitative findings. This research presents a model of an alternative for large urban secondary schools' dilemma in addressing low student academic performance and success.
17
Zarate, Lizette. "“We’re Different because We’re Scholars”: A Case Study of a College Access Program in South Los Angeles." Digital Commons at Loyola Marymount University and Loyola Law School, 2013. https://digitalcommons.lmu.edu/etd/209.
Full textAbstract:
This work is a case study focused on the practices of a comprehensive college access program that serves students in south Los Angeles that has maintained a high school graduation rate of 100% and a college matriculation rate of 98% since 1997. This study sought to utilize the voice and experience of students of color to discern the factors that are most effective in helping urban students of color and in turn, inform the future work of the college access community. The study was driven by the following research questions: a) which practices of a south Los Angeles college access program most impact a student's ability to matriculate to college? and b) How can the epistemology of urban students inform the work of college access programs? Through observations, interviews, journal exercises and document review, this study ranked the practices in order of importance according to the participants, and identified that structure and accountability are essential to the success of this college access program. In addition, the study revealed that the students of this program succeed academically because the program, provides students with structure, access and guidance; because it immerses its students in a college-going culture; because it offers access to academic and cultural resources; because it sets high academic expectations; because it engages the family of origin and creates a family within the program; and because it enhances the self-concept of its students: college access programs see students as scholars.
Using funds of knowledge as a framework, this study also introduced the original term, “masked epistemologies” which refers to the shared experiences of college access students once they enter college. The concept of masked epistemologies refers to the experience of students who enter college via a college access program, who go on to feel like her ways of knowing, shaped by the unique experience of being a high achieving student participant of a college access program from an urban setting, are disregarded in the new, unknown terrain of college, and must be masked or concealed, only to be revealed in environments considered safe. The students’ epistemologies go from being highly praised and admired, to being ignored to the point of invisibility. This study found that students of this college access program struggle with adapting to the social realm of college because they have not been exposed to class differences throughout their tenure in the program.
18
Zarate, Lizette. "We're Different because We're Scholars"| A Case Study of a College Access Program in South Los Angeles." Thesis, Loyola Marymount University, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=3610446.
Full textAbstract:
This work is a case study focused on the practices of a comprehensive college access program that serves students in south Los Angeles that has maintained a high school graduation rate of 100% and a college matriculation rate of 98% since 1997. This study sought to utilize the voice and experience of students of color to discern the factors that are most effective in helping urban students of color and in turn, inform the future work of the college access community. The study was driven by the following research questions: a) which practices of a south Los Angeles college access program most impact a student's ability to matriculate to college? and b) How can the epistemology of urban students inform the work of college access programs? Through observations, interviews, journal exercises and document review, this study ranked the practices in order of importance according to the participants, and identified that structure and accountability are essential to the success of this college access program. In addition, the study revealed that the students of this program succeed academically because the program, provides students with structure, access and guidance; because it immerses its students in a college-going culture; because it offers access to academic and cultural resources; because it sets high academic expectations; because it engages the family of origin and creates a family within the program; and because it enhances the self-concept of its students: college access programs see students as scholars.
Using funds of knowledge as a framework, this study also introduced the original term, "masked epistemologies" which refers to the shared experiences of college access students once they enter college. The concept of masked epistemologies refers to the experience of students who enter college via a college access program, who go on to feel like her ways of knowing, shaped by the unique experience of being a high achieving student participant of a college access program from an urban setting, are disregarded in the new, unknown terrain of college, and must be masked or concealed, only to be revealed in environments considered safe. The students' epistemologies go from being highly praised and admired, to being ignored to the point of invisibility. This study found that students of this college access program struggle with adapting to the social realm of college because they have not been exposed to class differences throughout their tenure in the program.
19
GUPTA, AKHIL. "RIVER TRAINING WORKS WITH SUBMERGED VANES AT DIFFERENT ANGLES." Thesis, 2014. http://dspace.dtu.ac.in:8080/jspui/handle/repository/15416.
Full textAbstract:
Scour is the main damage cause of abutments, piers, spur dykes and the hydraulic structure in the river bed .Change in flow characteristics lead to changes in sediment transport capacity, and hence to a local disequilibrium between actual sediment load and the capacity of the flow to transport sediment. At times it is required to provide greater channel depth for the purposes of Navigation as the depth available is less than the required depth.
The technique of Submerged Vanes helps in performing both the works simultaneously. The technique of submerged vanes is a new, cost-effective and efficient sediment management method in rivers. This method has positive environmental effects. The performance and efficiency of a submerged vane is related to its shape.
In this dissertation, Submerged Vanes performance analysis is done with different attacking angle in order to study the effect of scouring and deposition occurring due to different attacking angles and thus developing their Bed Profile and Developing their Speed Profile in the flume at various points.
20
Li, wan-yu, and 酈婉玉. "The Effect of Different Attack Angles on Karate Competition." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/38590241816838773195.
Full textAbstract:
碩士國立體育學院
教練研究所
89
Modern Karate is a transformation from traditional martial arts to a competitive sport. The way to win is to get points, winning the point depends on attack reaction, action time, attack power, degree, distance and speed. The styles of Karate are divided into the traditional way and the European way; the rules are continuously changing. The biggest difference between the two styles is the attack angle; the European way of attack uses a bigger angle than the traditional way. Therefore, this research tried to find out the effect of the different attacking angles in getting point. There were twenty-four subjects tested by reaction equipment, Accelerometer, Bio Pak system, Acknowledge software in these experiments. In experiment one the subjects were defenders. Tested by reaction equipment at different angles to get the data of the reactions. These data were analyzed and compared by one way ANOVA in SPSS for windows 8.0 software, and the significant level is p<.05. Experiment two had five attackers and one defender in one group while experiment three had one attacker and one defender in one group. In Experiment two and three, the percentage of successful attack were determined by a judge under the situation which the defender was attacked without warning by random attack movements and angles. The results showed that when the attack angle increased, the ability of defense will decrease significantly, and the percentage of successful attack will increase. Therefore, it could be suggested that the coach should increase more footwork training to enhance the athletes techniques with large attacking angles. The coach can also train the player to focus on large attack angles other than straight forward attacking while training.
21
詹文良. "To analyze slrategies of building brands from different angles." Thesis, 1992. http://ndltd.ncl.edu.tw/handle/41918896307482158769.
Full text
22
Tsai, Cheng-Chung, and 蔡正中. "The Comparison of Balance ability in Different Standing Angles." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/w3w8tg.
Full textAbstract:
碩士國立體育學院
教練研究所
90
The ability of keeping balance is not only important for general public, but also essential for the athletes. In the present shoes market, people emphasize that the functions of shoes include maintaining the stability of feet, cushioning and prevention; however, none of research has investigated the effect of different thicknesses of heels and ankle angles on balance ability. This research attempts to determine the influence of balance ability in different ankle angles, and expects to find out the best ankle angle in balance ability. The subjects in this study were thirty male (24.3±3.7 years). In the experiment, we interferenced people’s balance ability by a medicine ball, and measured the balance ability in different ankle angles with Kistler force plate system. The results of this study were summarized as followed: Static balance: he radius of COVGRF was minimum, when the ankle angle was 5 degrees of plantarflextion；Dynamic balance: (1) when the ankle angle was in 5 degrees of plantarflextion, the time of returning to balance was shortest. (2) As far as absolute degree is considered, the bigger the ankle angle is, the longer the time for people to recover balance required.
23
Liu, Hung-Chun, and 劉宏俊. "Action analysis of squat jump at different knee angles." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/wh6b5m.
Full textAbstract:
碩士正修科技大學
休閒與運動管理所
107
Abstract Research Motivation: In recent years, high school students have not only HBL (high school basketball league), but HVL (high school volleyball league) has gradually made high school students pay attention. The reason for the rise of volleyball is that volleyball has small amount personal skills than basketball. However, it is more important to ask the team to work together and make up for each other's deficiencies. The most important thing is to let the high school students have more stage to play. Research purposes: The purpose of the study is to analyze the height performance and motion analysis of vertical jumps at different knee flexion angles. Research method: A total of 12 students participated in the experiment. After completing the physical fitness analysis, the personnel were divided into three groups according to the BMI value after completing the physical fitness analysis, so that the knee joints were respectively 150. Degree, 120 degrees and 90 degrees of knee flexion angle, Squat Jump was performed three times, the average value of height and stagnation performance was measured, and the data was recorded. After the action analysis, the analysis was performed by single factor variability. The performance of the height, speed and acceleration of the vertical jump of the three groups of personnel. Experimental results: When the knee flexion angle was 120 degrees and 90 degrees, the performance of the flexion jump was performed, and the motion benefit of the exercise was explored.
24
Shen, Jin-Yi, and 沈進益. "Biomechanical Analysis of Soccer Place Kicking From Different Approach Angles." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/18711438257356792234.
Full textAbstract:
碩士國立臺灣師範大學
體育學系
91
ABSTRACT The purpose of this study was to compare the performance of four different approach(0°,45°,90°and regular angle)for ground kicking by eight collegiate soccer players. Everyone were required to take a three-step run-up to kick the ball from four different angle of approach. Two high-speed camera(Redlake, 250 Hz)were synchronized to collect the 3-D data. The 3-D kinematics data was calculated by Kwon3D analysis system. And a repeated one-way ANOVA and the Pearson product moment correlation were used to test the selected variables at .05 significant level. The results shown as follows. The regular approach angle was averaged 34.3±3.5°, the flight distance of soccer ball distance was averaged 47.90 m, the initial velocity of soccer ball was 27.32±1.18 ms-1, maximum linear velocity of the toe was 18.03±0.74 ms-1 and the velocity of toe at impact was 16.90±0.67 ms-1. There were found significant differences at the regular approach angle that ball velocity and linear velocity of the toe compared with 0° and 90°. In the results we found not easy for kicking far at approach angle of 0° and 90°. Although there were no significant differences between 45° and the regular angle, however, the mean values at the regular approach angle was more than 45°. In correlation test, several variables had significant relations with ball volecity. The variables were: the last approach stride, the time from right toe-off to ball impact, the velocity of center of mass(C. M.) at ball impact, the linear velocity of hip, knee, toe. But we had not found significant relations the absolute angular velocity with ball velocity. We conclude that the regular approach angle is better to perform the place kicking, and the suggest the angle range was 30~38°. Further study should focus on the kinetics of place kicking and compare the difference between instep kicking and place kicking.
25
Lun, Chen Wei, and 陳韋倫. "The establishment of 3D imaging technology research under different angles." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/39237063566248731994.
Full textAbstract:
碩士中華科技大學
機電光工程研究所碩士班
101
Due to the progress of technology, the current trends of products are the lightness, artfulness, and multifunction. Basic holographic zone plate is basically equivalent to plano-convex lenses of the traditional optical elements. It can focus light at a point. However, it is inevitable that it features with aberrations and dispersions, same as the traditional optical elements. The traditional optical elements reduce aberrations and dispersions to minimum with complex calculations with computers. Holographic optical elements have changed various interference methods and arrangements and assemblies to reduce the generations of aberrations and dispersions. However, it is possible for reduction but elimination. Thus, this research was conducted with semiconductor green light laser to change the exposure time of film and developing time of chemical etching to figure out the developing quality of holography and verify if the relationship curves of the exposure time and penetrative rate, the exposure time and diffraction efficiency, the developing time and penetrative rate, and the developing time and diffraction efficiency are correct. It is inspected with the principle of polarized light if Polaroid can be used to eliminate the noise generated during developments of holography to make the images clearer. Eventually, the relationships of holographic optics under laser irradiation between different wavelengths and developed images are explored to measure the diffraction efficiency of holographic optical elements and recreate the images of holographic optical elements. The features of focus, imaging, aberration, and diffraction of holographic optical elements are explored. In the future, it can be applied to various optical and photoelectric products.
26
Lee, Ping-Ruei, and 李秉叡. "Effects of Moye Rear Blocks with Different Angles onSprint Starting." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/dwh6ax.
Full textAbstract:
碩士臺北市立大學
運動器材科技研究所
105
Purpose: the purpose of this research is to discuss how the different angles of the rear starting blocks influence the first two steps of the starts. Methods: 8 male high school short distance athletes were recruited to be participant as Moye Starts samples, and changed the angles of the rear starting blocks to , ,and to start the race.Three-dimensional motion analysis system was used to record the movements of first two steps, meanwhile, the displacement of center of gravity (COG), strike length, strike pace and the kinematics of lower limbs were calculated as parameters. Using a one-way ANOVA with repeated measure to estimate how the different angles influence the parameters, and significant level is set at . Results: At the block angle of , the height of COG at the front leg touching down on land was significantly lowest, but the moving velocities of COG during the first two steps at the different blocks angles were not different. Moreover, there were better performance of the strike lengths and pace of two steps at . The kinematics data were shown that the hip angle of rear leg at the hand off land and the knee angle of both legs at rear leg touching down on land with were significant difference with . When short-distance teen athletes use Moye starts to race, they could have better performance of first two steps with the lowest COM height at the rear block which could be effectively affected the lower limb motion.
27
WANG, DING CHIEH, and 王鼎傑. "Push and pull force of different shoulder and elbow angles." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/e3y9t9.
Full textAbstract:
碩士國立雲林科技大學
工業設計系
107
A good working environment can reduce injuries and help users improve operational efficiency and reduce the effort and time spent on work. Current research indicates that workers have a high proportion of musculoskeletal injuries due to work, especially on the hands and shoulders. The literature also points out that posture and exertion are the most common hazard factors. The posture of push-pull force has a high prevalence in work, and there are few studies related to human factors. The posture of push-pull force has a high prevalence in work, and there are few studies related to human factors. This study recruited 40 adult and healthy subjects (20 males, 20 females) to conduct hand measurements and force studies. The experiment is divided into three parts; (1) Measurement of adult hand size. (2) When the upper arm is perpendicular to the forearm, the force applied in the push-pull direction of the five angles of the shoulder joint (45°, 22.5°, 0°, -22.5°, -45°). (3) When the upper arm is perpendicular to the forearm, the force applied in the push-pull direction of the seven angles of the elbow joint (90°, 60°, 30°, 0°, -30°, -60°, -90°). The results of the study showed that under the shoulder joint posture: (1) The average force applied by men is 8.25 kg, the average force of women is 5.62 kg, and that of women is 0.68 times that of men. (2) The average applied force in the pushing direction is 6.61 kg, the average applied force in the pulling direction is 7.27 kg, and push is 0.91 times that of the pull. (3) Men's exertion in both directions and five angles is significantly greater than that of women, and the advantage of exerting force is more obvious in the direction and angle at which greater force can be applied. (4) In the five-angle force, the force of 0 degree is the largest, and it is significantly different from each angle. Based on this, the larger the angle of rotation, the smaller the force applied.In the elbow position: (1) The average force of men is 8.59 kg, the average force of women is 5.86 kg, and that of women is 0.68 times that of men. (2) The average applied force in the pushing direction is 6.80 kg, the average applied force in the pulling direction is 7.65kg, and push is 0.89 times that of the pull. (3) In the seven-angle force application, the force of 0 degree is the largest, and it is significantly different from each angle. Based on this, the larger the angle of rotation, the smaller the force applied, and the force is slightly increased when the supination is 90 degrees.The results of this study provide a reference for workstation and hand tool design.
28
Yen, Ming-Cheng, and 顏名成. "Simulation on Performance of Small-scale VAWT with Different Pitch Angles." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/00732256241637498370.
Full text
29
Wu, Li-Yi, and 吳俐儀. "Video Reconstruction from Different Viewing Angles Based on Image-Based Rendering." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/22917188074556643706.
Full textAbstract:
碩士淡江大學
資訊工程學系碩士班
99
Using some images to generate the 3D images is a research that receives the attention in multimedia area. Image-Based Rendering (IBR) is one kind of the technique. The main idea is to compute the geometric parameters of the scene from one or more images. After getting the parameters, it can model the scene and paste the suitable textures to generate the 3D effect. In this thesis, we use the concept of IBR to achieve the scene rotation. We shot several videos in the same scene, and we can compute the angle of each frame by our method. We compose all the videos and let user can change the angle when the video is playing. The result is very similarity to Google Map, it is an interactive video technique, and it will be the main stream in 2D-3D video processing area.
30
Lin, Ming-Jen, and 林明仁. "Generated power of solar cell Module at different sunshine incident angles." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/e5emx6.
Full textAbstract:
碩士國立虎尾科技大學
光電與材料科技研究所在職專班
98
Because the Earth detours path of the solar to result in the transformation along with the season to differ from, performs of geographical position difference the north and south hemisphere, will have time and the angle throughout the year the different sunshine in the different position. Therefore establishment of angle and the direction the solar energy board will affect the whole electricity generation potency. Therefore this research is according to the related meteorological data, then the use program in various positions and outside the angle computation simulation''s way, strengthens the mobile in addition north Taiwan the Namhkok different latitude and different (elevation 1000 meter, 2000 meter, 3000 meters) gauges on the spot highly meets the card gross data and the measured data accuracy. But substitutes for the artificial empirical rule judgment way, discovers position and the angle the best solar energy board installment by the time, provides the manufacturer installment to establish the material effectively to raise the economic efficiency.
31
Sun, Yao-Fu, and 孫堯福. "Generation Performance Analysis of Solar Systems with Different Installation Orientation and Tilt Angles." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/54314264241507967043.
Full textAbstract:
碩士國立勤益科技大學
電機工程系
101
Pediment framework steel structure metal roofing house is a common building in Taiwan. Most of plants are built in this way currently. In the traditional custom, the best building is located north and faced south. Therefore the slope of roof is east-west oriented. We attempt to find the more efficient way of utilizing this kind of buildings for photovoltaic (PV) system. This article studies 7 PV systems installed on 5 steel structure metal roofing houses at the same site. The total capacity of PV systems is 230kWp. After 2 years long-term of system running, the generation performances of these 7 PV systems are analyzed. These results can provide useful information for similar system built-up in the future. With the higher elevation tilt of the PV modules, the amount of sunlight will be affected more by the azimuth angle; on the contrary, with lower azimuth angle, it will have less affection. According to the article, with the power generation performance of east-west elevation angle of 16ﾟ, the result shows that the affection in the central region is less than 10%. It deserves our attention and promotion if the iron roof follows the current recommendation with the drowning slope range of 2/12 to 4/12 (9.46ﾟ ~ 18.43ﾟ). The PV modules under long terms of outdoor power generation and the dirt surface cleaned by the natural and pure power. The elevation angle has less affection to the RA value, which can be known from the statistical result of DC power generation and the RA value; On the contrary, it has more direct reasons to the surrounding environment. Therefore, we do not encourage you to install the function of auto-cleaning in each system, as it will increase the cost of overall power generation. It is quite stable after the relating systems installed which belongs to our study. In this period, all the main components relating to the solar power system function normally, except to the signal transmission and the relating conversion equipments, which will breakdown easily under the high temperature. This result corresponds to the system design and the installation anticipation, and therefore the solar power generation system is highly stable power generation equipment.
32
Shen, Chih-chung, and 沈志忠. "The Investigation of Different Groove Angles and Thickness Influenced of Steel Structure Welding." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/54643739912367517035.
Full textAbstract:
碩士國立屏東科技大學
土木工程系所
102
This investigation provided some welding test for real-sized BOX columns fabricated into small pieces with different groove angles. Eighteen SN490B steel plates as specimens consist of single-groove weld (30°), single-groove weld (45°) and double-grove weld (15°) are analyzed, welded with different thickness specimens, and applied respectively in the metallographic test, standard tensile test, and servo control test. This investigation used the above specimens to make metallographic, standard elongation, and tensile test to explored how different groove angles and thickness influenced the time consumption, quantities of weld, economic performance, and mechanical change after welding. The test result shows that when the thickness is more then 40 mm, the welding comprises double-grove weld (15°) provide the most economical efficiency. The specimens were ruptured in the base material and fused completely in the metallographic test.
33
Chang, Ling-Yun, and 張齡勻. "Numerical Study on the Flow Past Two Elliptic Cylinders With Different Attack Angles." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/60874137165907866861.
Full textAbstract:
碩士國立暨南國際大學
土木工程學系
98
Article, Cartesian Grid Method is adopted to investigate Flow Past Two Elliptic Cylinders With Different Attack Angles. In solving the Navier-Stokes and continuity equations, a finite volume method is used in conjunction with a two-step fractional-step procedure. The key aspect in developing a Cartesian grid method for flow with complex geometries is imposition of bluff bodies. In this study, a simple concept of Immersed Boundary method is adopted by using distributed body forces in the Navier-Stokes equations instead of the existence of bluff solid bodies. Similar procession has been applied by Ravoux et al. [1] and they referred it as Embedding method. The local grid refinement is also used in this study by applying the nested grid technique. Article, flows past two elliptic cylinders with different attack angles are studied systematically. Flows at different Reynolds numbers with Re=200 and Re=300, different ellipse aspect ratio with aspect ratio=2 and aspect ratio=3, various gape ratio of G=1.6~6.0, and various attack angles of =40 ~ -40 are computed and observed. Article, 29 flows past two elliptic cylinders are studied and 3 different kind of flow patterns are founded. They are In-phase flow, Out of phase flow, and Asymmetry flows, respectively.
34
Lin, Lien-Hua, and 林聯華. "The Effect of Different Knee Angles in Basketball Defense Position’s Balance and Moving Ability." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/15177148717142852156.
Full textAbstract:
碩士國立體育學院
教練研究所
93
Abstract In the basketball competitions, when players defense, they are always being defense position all the time. The purpose of this research is to determine the best knee angle of basketball defense position, whether in the static body balance ability or in the dynamic body moving time. The subjects in this study were 12 male（17±0.2 years）. In the experiment, we used AMTI force plate system to receive the static radius of body’s center of gravity and the dynamic moving time. The results of this study were summarized as followed: the static radiuses of body’s center of gravity at 120 degree were minimum. The radiuses were to be significantly lesser (p<.05) than the radiuses at other knee angles(t=2.850，p=.036); Dynamic moving time: it was the shortness moving time at 120 degree significantly to the other knee angles(t=3.909，p=.011). The conclusion was that when knee angles at120 degree had the best body balance ability and moved body quickly in doing basketball defense position.
35
L, C. H., and 林正祥. "Three Dimensional Simulations of Turbulent Flows Around a Square Prism with Different Impacting Angles." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/27325606920505257545.
Full textAbstract:
碩士國立屏東技術學院
土木工程技術研究所
84
or tall building were important in the fluids related engineering. In the present study, the personal computer , and the computational fluid dynamicspackage FIDAP were used to simulate the flow separation phenomenon for the turbulent flow around a square cross section prism of impacting angle 0, 15,30 and 45, respectively. The standard and its extended models were employedfor the governing equations. The investigated physical parameters includingvelocity vector, streamline, tubulent kinetic energy, turbulent dissipationand pressure. Part of velocity profiles were compared to available experimentaldata to check the ability of numerical models. Besides, the simulation were also performed for a three dimensional case for further describing the flow fields. From the results, it is found that the recirculation area behind the obstacle was increased rapidly, and the pressure drop was increased with the impactingangle. For the three dimensional case, the obtained basic flow behaviors were similar to those of two dimensional case, but the scales of physical parameters for the three dimensional case were larger than those of the two dimensional case. The three dimensional effect was significant,particularly under a non-symmetric geometrical flow domain. From this study. it might conclude that the impacting angle of 0 could induce the smallest turbulence, which provide usefuldata for arranging the structure in the related engineering.
36
Ger, Yuh-Hwan, and 葛玉環. "Theoretical study of GeH4 dissociative adsorption onto Ge(100) by using different incident angles." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/43690525271400900995.
Full textAbstract:
碩士淡江大學
化學學系碩士班
97
Using density functional theory (DFT) with ultrasoft pseudotentials and plane wave basis to calculate the reaction of GeH4 dissociative adsorption onto Ge(100). Through the analysis of structure, energy and density of state (DOS) to investigate the following three reaction path: single dimer mode (SDM), adjacent two dimers mode (ATDM) and nearest neighboring dimers in row mode (NNDIRM). In NNDIRM, choosing incident angles as 10˚, 20˚ and 30˚. To define the 0˚ angle that GeH4 impact the surface, choosing the direction from Ge-H bond within GeH4 to dangling bond to be 0˚. To define the incident angle, choosing the normal vector of the plane formed with the dangling bond of buckled-down Ge as the rotation axis, and the buckled-down Ge as rotation center. Using partial structural constrain path minimization (PSCPM) to find the reaction path and the information of transition state and to probe into the relation between activation energy, transition state structure and the different of incident angle and reaction path. Through DOS analysis to understand the variation of DOS of initial state (IS), transition state (TS) and final state (FS). After calculation, trend of activation energy: NNDIRM_10° > NNDIRM_20°> ATDM > NNDIRM_ 30° > SDM. The same result showed in the trend of bond length of Ge-H bond within precursor in transition state and buckled -up Ge with Ge in precursor. The better reactivity happened in SDM which has smaller incident angle. As Boltzmann distribution law, to increase the reaction probability in reaction path of higher activation energy, the more incident kinetic energy and higher substrate temperature is needed in experiment so that Ge-H bond within precursor could be distorted more and elongation of Ge=Ge dimmer could be larger, respectively. In the research, we found NNDIRM_10°, NNDIRM_20°and ATDM which have higher activation energy could make structure change more in transition state. As a result, the increasing of incident kinetic energy and substrate temperature will also increase reaction probability of those reaction paths.
37
CHUAN, LIN LIANG, and 林樑銓. "A Study of the Impact of Different Blinds Angles of Shades on Indoor Warmth." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/49259059628229329129.
Full textAbstract:
碩士中國科技大學
室內設計研究所
102
A Study of the Impact of Different Blinds Angles of Shades on Indoor Warmth Abstract The rapid depletion of the Earth’s energy has left us with the important task and mission of daily energy conservation. The use of “shades” for building windows is an important way to conserve energy in basic building design; it also has a profound influence on the power consumption of air conditioning and lighting equipment. Through a full-scale house-in-house experiment, leveled shades were installed above the outdoor openings facing west. During two equinox seasons, namely the autumnal equinox to the winter solstice and winter solstice to the spring equinox, two blinds angles for the leveled shades were used to measure and test the indoor temperatures and effects. Three conclusions were drawn from the empirical study: 1. From the autumnal equinox to the winter equinox, the blinds angles of 0 degree and 90 degrees showed no significance in terms of full-day temperature difference and cooling effect; from 10:00AM-02:00PM, the installed leveled shades with blinds angles of 0 degree and 90 degrees had the cooling effect of 0.9℃. 2. From the winter solstice to the spring equinox, the full-day temperature difference and cooling effect was not significant at the blinds angles of 0 degree and 90 degrees. On the other hand, from 10:00AM-02:00PM, the installed leveled shades with the blinds angle of 0 degree were superior to the blinds angles of 90 degrees. For the house-in-house laboratory, the indoor or temperature drops did not exceed 0.8℃ on average. 3. For two time periods, namely from the autumnal equinox to the winter solstice and from the winter solstice to the spring equinox, from 10:00AM-02:00PM, the installed leveled shades with blinds angles of 0 degree and 90 degrees, the indoor temperature drops did not exceed 1℃. This indicates the leveled shades installed above the openings facing west for the house-in-house in the laboratory showed no significant differences as far as the effect of indoor temperature drops is concerned. Keywords: shading, blinds angle, warm influence, power consumption
38
Lin, Yu-Chin, and 林育槿. "The Effect of Muscle Activation during Push-Ups with Different Methods and Angles Suspensions." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/3c8msw.
Full textAbstract:
碩士國立清華大學
體育學系所
105
Purpose: To compare the muscle activation during push-ups with different methods and angles suspensions. Methods: The participants were 19 healthy male adults (age: 21.05 ± 1.22 yrs, height: 174.12 ± 4.92 cm, weight: 70.71 ± 7.23 kg). Repeated-measures design was adopted, completed the non-suspension, hands suspension and foot suspension push-ups conducted by five different angles which are +30º, +15º, 0º, -15º and -30º, respectively. Each angle completed by five times and with at three to five minutes rest in between. Each test separated by at least 48 hours. Root mean square electromyography was collected for the pectoralis major, anterior deltoid, triceps, upper trapezius and serratus anterior during all repetitions. RMS-EMG values were normalized to a maximal voluntary isometric contraction (% MVIC). The differences of muscle activation between the three suspensions and five angles were analyzed by repeated measure two-way ANOVA. Significant level was set at α=.05. Result: The results of different suspension methods showed that the activation of the pectoralis major was significantly higher in hand and foot suspension than in non-suspension (p < .05); The activation of the upper trapezius was significantly higher in hand suspension than in foot suspension (p < .05); The activation of the serratus anterior was significantly higher in foot suspension than in hand suspension (p < .05); There were no significant differences in the anterior deltoid and triceps(p > .05). The results of different suspension angles showed that the activation of the pectoralis major was significantly lower in -30º suspension than in other four angles suspension (p < .05); The activation of the anterior deltoid was significantly higher in -15º and -30º suspension than in other three angles suspension (p < .05); The activation of the triceps, upper trapezius and serratus anterior was significantly higher in -30º suspension than in other four angles suspension (p < .05). Conclusion: In the hand and foot suspension push-ups, maximal activation of the pectoralis major occurred when the shoulder position is parallel and above the foot. Maximal activation of the anterior deltoid, triceps and serratus anterior occurred at -30º regardless of three kinds suspension methods in push-ups; In the hand and non-suspension push-ups, maximal activation of the upper trapezius occurred when the shoulder position lower than the foot. These results could be used as a supplemented training information.
39
HsiChen and 陳曦. "Theoretical analysis of a two-stage Stirling cooler with different phase angles between displacers." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/69yj87.
Full text
40
Kai-HsiangWu and 吳凱翔. "Analysis of Condensation Heat Transfer Enhancement on Hydrophobic-Hydrophilic Surfaces with Different Contact Angles." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/f79yk9.
Full textAbstract:
碩士國立成功大學
航空太空工程學系
107
This study investigates the effect of surface condensation heat transfer (CHT) gain with different contact angles, and confirms through theoretical analysis and experimental comparison that the larger the static contact angle in dropwise condensation is, the smaller the heat flux is. This study also combines the design of the hydrophilic-hydrophobic hybrid surface to enhance the CHT effect. Surface modification technology based on screen printing technique is used to fabricate CHT surfaces, including hydrophobic surfaces with 4 different static contact angles and hydrophilic-hydrophobic hybrid surfaces with 15 sets of different hydrophilic widths and hydrophobic widths of the matching. In terms of hydrophobic surface experiments, the results show that the surface with a static contact angle of 100° has best CHT effect. In terms of hydrophilic-hydrophobic hybrid surface experiments, the results show that the hydrophilic surface width of 200 μm with the hydrophobic surface width of 300 μm has the best gain ratio, compared with the hydrophobic surface can increase the heat flux by about 10%. In today's development environment focusing on energy efficiency, the results of this study are valuable and can be applied to CHT systems such as heat exchangers.
41
Sanwal, Shantanu. "Turbulent Natural Convection in an Enclosure With a Triangular Roof with Different Inclination Angles." Thesis, 2016. http://ethesis.nitrkl.ac.in/9283/1/2016_MT_SSanwal.pdf.
Full textAbstract:
The turbulent natural convection in a square enclosure with triangular roof is studied employing the standard k−ε model. The flow and thermal characteristics are presented in the form of streamline, isotherm contours, velocity vector, turbulent kinetic energy and dissipation of turbulent energy. Local and average values of Nusselt number and heat flux are also presented for top and side walls for Rayleigh numbers ranging between 5 ×109 and 1×1011. The finite volume method based SIMPLE algorithm is utilised for understanding the flow and thermal behavior arising due to buoyancy. The convective flux is discretised using the power law upwind scheme while the diffusive term is discretised using central difference scheme. The effect of roof inclination is also studied by varying the height. It has been observed that the cooling capacity, represented by the heat flux through cold vertical wall decreases with increase in height H, but after a certain value of H, heat flux is almost constant.
42
Tsai, Jui-An, and 蔡瑞安. "The Influence of Different Angles of Prism Reflector’s Alignment on Electronic Distance Measurement Using Baseline." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/28824482930617898136.
Full textAbstract:
碩士逢甲大學
環境資訊科技研究所
93
In the recent years, in order to get the high accurate data of distances conveniently and fast, Electronic Distance Measurement (EDM) has been generally used on Survey. But we often ignored the influence of different angles of prism reflector’s alignment. The major function of prism reflector is reflecting the light wave, and it must have three conditions: 1. well reflection, 2. well optics system, and 3. well target. And then, the paper is to analysis that the influence of different angles of prism reflector’s alignment on Electronic Distance Measurement (EDM) using base lines. According to my study, we can find that the max error is 13.3 mm. Therefore, it is proved that different angles of prism reflector’s alignment would influence the data of distances on Electronic Distance Measurement. The result of my study is higher than the theory; it may be due to the systematic error. And then, the data from reflective sheeting is instable as the result of atmospheric interference.
43
SHiu, Shiou-Jr, and 徐秀枝. "Transmission Rate Enhancement of Disk Drive System Subjected to Base Excitation at Different Inclined Angles." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/16913159168573670674.
Full textAbstract:
碩士大同大學
機械工程學系(所)
96
Due to the progress of information technology, multimedia information products need high performance promotion and improvement. The storage device of computer information product becomes a basic equipment nowadays. It brings convenience (e.g. ATM, Pronunciation service system, Easy card automated system, etc) to our life. Industry computer plays an important role in the business. The computer not only has simple function, but also controls the whole operation flows in the factory. Hence, it can not be interrupted or crashed during the operation. And the computer must have high storage system with security and stability. Therefore an anti-vibration mounting is needed unlike the personal computer. The mounting protect the data transmission to avoid date lost from interrupted or crashed by external power or vibration of machine operating. This thesis is to investigate the effect of the transmission efficiency when the disk system (hard disk) is reading at acclivitous angle. The performance of transmission efficiency has been noted when the disk system subjected by the vibration at different inclined angles. The method can be discussed into two parts. Firstly, compare with different angle, different vibration level, and different vibration rate, the transmission efficiency has good results when it is 160Hz, any angles, Isolator 20A. Secondly, the transmission efficiency has better effect when it is 160Hz , at any angle, complex Isolator 8A40A at different angle, different vibration level, different vibration rate comparability with different complex Isolator. At last, comparing with different angle, different vibration level different vibration rate, different Isolator VS different angle, different vibration level, different vibration rate, different complex Isolator, the best transmission efficiency is 160Hz, at any angle, complex Isolator 8A40A.
44
Tsai, Ming Chang, and 蔡明章. "Biomechanical Analysis of Different Trunk Tilting Angles on Joint Loading during Fall onan Outstretched Hand." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/26626556406965425220.
Full textAbstract:
碩士國立成功大學
醫學工程研究所
91
This study investigated the effects of different tilting angles on joint loading of the upper extremity during fall on an outstretched hand. The absorbed energy and joint loading at Ts, T1, T2 and Te were analyzed. Reviewing the past literatures, studies on the forward fall had focused on the relationship between the joint loading and position of the forearm and elbow. Previous studies also stressed the importance of energy absorption by the shoulder and elbow during the forward fall. However, the effects of different tilting angles on joint loading of the upper extremity had not been presented. Ten healthy young males volunteered for this study. With their outstretched hand 5 cm above the ground, subjects were adjusted to different trunk tilting angles of 0o, 10o, 20oand 30o with the help of a suspension system. The expert vision motion system with 6 CCD camera and one force plate were used to collect kinetics and kinematics data. Using Matlab to calculate kinematics and kinetics, then results can be analyzed by SPSS. With different trunk tilting angles, there were significant differences in the medial-lateral shearing force, adduction/abduction moment and flexion/extension moment. The trunk tilting angles did not affect the impact peak force(F1,F2) and increases with the lateral shearing force on the wrist , elbow and shoulder joints. Increase of trunk tilting angle resulted in increased lateral shearing force on the wrist , elbow , and shoulder joints. With increasing trunk tilting angle, there were greater abduction/adduction moment and flexion/extension moment at T2.Therefore, there is greater risk of shoulder injury.
45
Chen, Wen-Yi, and 陳文毅. "A Study Of The Influence From Different Running Slope On The Angles Of Limb Joints." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/35317312278719643186.
Full textAbstract:
碩士輔仁大學
體育學系碩士班
100
This researchmainly aims at analyzing how the examinees' hip joint, knee joint and ankle joint would differ when running upwards and downwards on the same slope and how the lower limb joint's angle would be influenced substantially while running on different slopes for the reference basis that the runners and the coach conduct slope running training. The research methodology adopts a "Mega Speed" "MS30K" "Video Recorder" for capturing each examinee running on different slopes for up to 10 seconds and then conducting comparison. The analysis are concluded as below: 1. The changes of decline angles influence substantially the hip joint declining angle during the supporting phase. When those declining angles are compared with 0%, the more upwards the slope is, the bigger the influence the hip joint would have. Among those 4 slopes, the upward slope at 5% demonstrate that the difference among each of the 3 joints would be the biggest. The other slope declining angle don't demonstrate significant differences. 2. During the swinging phase the changes of the declining slope angles pose significant influence on the changes of each of the joint's angles. The declining angles of the upward slope vary reversely with the angles of the hip, knee and ankle joints. The declining angles of downward slope vary positively both the hip and knee joints. 3. The declining angles of the knee and ankle joints were compared together for during running on horizontally and upwards and downwards. There demonstrates no significant difference. It indicates downward slope running involves with less muscle than during upward slope running and therefore the downward slope running could be easier than the upward slope running. 4. If the angles of each those joints are compared with that conducted on horizontal running, the upward slope running involves more muscle be use than the downward slope running. For the purpose of physical fat burning or muscle training, the upward slope would be better. Therefore, there can be concluded from the aforesaid discovery that among running on slope of various angles, for reaching the coordination and comfort to the same extent that can be done on the horizontal running, the hip joint shall adapt properly by changing its angles. The changes of upper limb joint can also indicate that the downward slope running could be easier than upward slope running. For the purpose of physical fat burning or muscle training, the upward slope running could be more efficient than the downward slope running.
46
Huang, Yu-Shan, and 黃鈺珊. "Study of the Influence of Different Draft Angles on Texture Glossiness of Injection Molded Parts." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/n66ct6.
Full text
47
Yuchang, Lee, and 李禹昌. "The Study of Different Cutting Parameters and Engagement Angles for Titanium alloy (Ti-Al6-V4)." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/3ks4kn.
Full textAbstract:
碩士國立勤益科技大學
機械工程系
106
Titanium alloys have been widely used in various industries. For example, 14% of AIRBUS A350 parts use titanium alloys. In order to save fuel costs, the use of titanium has gradually increased. The material removal rate of aerospace parts is often as high as 90% to 95%, so efficient mass cutting is the capability that Aerospace processing must possess. Since titanium alloys have characteristics such as low thermal conductivity, small elastic modulus, and high chemical activity, they are classified as difficult-to-cut materials. Therefore, the problem of tool wear and elongation is a problem often encountered in the processing of titanium alloys. In order to solve the problem of titanium alloy processing, many research methods have been proposed. In these studies, there is little research on the engagement angle. The engagement angle is determined by the tool diameter and the width of the tool cutting material. This condition is an indispensable parameter for setting cutting conditions. The purpose of this experiment is to investigate the effect of the engagement angle on the tool wear of the tool in cutting titanium alloys to provide the best tool life performance in addition to ensuring removal rates when setting up cutting conditions.
48
Wang, Wei-Guang, and 王尉光. "Cadets stand in different Visual angles study on stability -A case study of air force Academy." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/2ptfg4.
Full textAbstract:
碩士義守大學
電機工程學系
102
Balance is essential to human body. Obvious imbalance is always happened to the people with uneven leg length. This study discuss the relationship between visual balance and measurement center to the un even leg length by measuring cadet''s standing point and position during the military parade,the result was affected by the distance and angle when cadets gaze upon officers. This study utilized Labview and wii balance board to measure 12 cadets(the age around 20-22). Standing on the wii balance board and changing the object''s distance and angle for few minutes will not affect the center of gravity on the X-Y axis. So it is no relationship with uneven leg length. The result is limited by stan ding pose. The stability is better for the people with lighter weight.
49
王中錚. "Morphological changes of the dentin surface induced by Nd-YAG laser light delivered on different angles." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/63181329836617339848.
Full textAbstract:
碩士國立臺灣大學
臨床牙醫學研究所
88
Scanning electron microscopic studies have shown that Nd-YAG laser could causes melting of dentin, leading to closure of exposed dentinal tubules orifices. However, there are still many factors affecting the result during laser irradiation procedure, the most important factor that could be possible to ignore is the laser irradiation angles. The purpose of this study is to evaluate the morphological changes of the dentin surface irradiated by Nd-YAG laser under different angles. Thirty dentin specimens were used in this study. The samples were randomly divided into three groups. The Nd-YAG laser with optic fiber of 400 m and irradiation angles are 30, 60and 90 were divided into three groups ( group A, B and C). All the dentin specimens accepted the Nd-YAG laser energy are 100 mJ, 150 mJ with 10 pulses and 20 pulses for 4 seconds respectively. Under scanning electron microscope (SEM) observation, the irradiation angles of 30and the laser irradiation energy were up to 150 mJ and 10 pulses, the dentin surface were abraded into a well shaped crater with melted dentin structures. Thermal effects became more evident when irradiated at an angle of 90, as revealed by severe abraded crater and presence of some fracture lines. The results indicate that Nd-YAG laser irradiated at an angles of 30, the suggested irradiation energies should be 150mJ,10pps.
50
Wang, Kuen-Lin, and 王坤林. "Effects of Different Overburden and Angles of Slopes on the Deformation and Lining Stresses of Tunnels." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/20692783426934015795.
Full textAbstract:
碩士國立臺灣科技大學
營建工程系
88
Because of the special conditions on topography and geology in Taiwan, the tunnel under slope must consider of the safety of itself, and needs to pay more attention to the interaction between the tunnel and slope. This research adopts three dimensional finite difference program, FLAC3D, to analyze the effects of different overburden (2,4,6 times of radial of the tunnel ), angles of slopes(30°、45°、60°), K-value(0.7,1.0,1.5) and GSI-value(30,45,60) on the deformation and lining stresses of tunnels. The results of numerical analysis show are as follows: (1) Overburden of slope has significant influence on tunnels. (2) When the overburden is 2,4 times of the radial of the tunnel, lining stresses of tunnel have large change. The change mitigates while 6 times of the radial. (3) The deformation of the side near slope on tunnel turns upward externally when the angle of tunnel is 60° and K is 1.5. This phenomenon is more obvious while the overburden is double radial thickness. (4) The ratio of pre-support deformations of the sidewall of the tunnel is smaller than 1.0, but greater than 1.0 while the 60°-angle. When K-value is 1.5, the ration is about 3.5 to 3.8.