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Dissertations / Theses on the topic 'Hollow heart'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Jivanuwong, Solos. "Nondestructive Detection of Hollow Heart in Potatoes Using Ultrasonics." Thesis, Virginia Tech, 1998. http://hdl.handle.net/10919/36671.

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Ultrasonic techniques were used to detect hollow heart in potatoes nondestructively. Fifty Russet Burbank potatoes were evaluated physically and sonically. A pair of dry-coupling 50-kHz ultrasonic transducers were used to generate an ultrasonic pulse with a power level of 0.22 W for the test of acoustic transmission through whole potato tuber in a transverse direction at different locations along the longitudinal axis with a certain interval distance. It was found that the waveform analyses in time domain for a series of transmitted signals along the longitudinal axis of potato tuber, yielded

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2

Cook, Corina K. "Hollow at the core apocalyptic visions in Joseph Conrad's Heart of darkness and T.S. Eliot's The waste land /." Instructions for remote access. Click here to access this electronic resource. Access available to Kutztown University faculty, staff, and students only, 2002. http://www.kutztown.edu/library/services/remote_access.asp.

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Thesis (M.A.)--Kutztown University of Pennsylvania, 2002.<br>Source: Masters Abstracts International, Volume: 45-06, page: 2842. Typescript. Abstract precedes thesis as preliminary leaves 1-2. Includes bibliographical references (leaves 81-86).

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3

Astrouski, Ilya. "Polymeric Hollow Fiber Heat Exchanger Design." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-240499.

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This Ph.D. thesis is focused on theory and experimental investigations developing of new knowledge about polymeric hollow fiber heat exchanger (PHFHE). The state-of-the-art study of plastic heat exchangers shows that their usage is limited by several niches where their advantages significantly dominates, or where the use of non-plastic competitors is not impossible. On the other hand, plastic heat exchangers (and PHFHEs in particular) are devices of increasing interest. It is shown that use of small tubes (fibers) allows PHFHEs to be more competitive than conventional plastic heat exchangers.

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4

Ford, Theodore Robert. "Thermal conductivity of bonded hollow-sphere monoliths." Thesis, Georgia Institute of Technology, 1991. http://hdl.handle.net/1853/20045.

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5

Gonzalez, Ralph P. "Hollow sphere radiant thermal conductivity reduction using infrared pore opacification." Thesis, Georgia Institute of Technology, 1993. http://hdl.handle.net/1853/20495.

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6

Bartuli, Erik. "Optimization of Heat Transfer Surfaces of Heat Exchangers." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-401602.

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Disertační práce je zaměřena na kovové a polymerní výměníky tepla. Hlavním předmětem zkoumání je optimalizace teplosměnných ploch za účelem zvýšení účinnosti výměníku tepla. Tyto cíle byly dosaženy experimentálně a numericky pomocí modelování v ANSYS. Na základě dosažených výsledků byla rozpracována technologie křížového navíjení polymerních výměníků z dutých vláken. Experimentální zařízení původně určené pro navíjení tlakových nádrží bylo modifikované pro automatizovanou výrobu polymerních výměníků z dutých vláken, ježto může být použita při jejich masové výrobě. Tato práce se také zabývala v

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7

Anh, Viet Bui, of Western Sydney Hawkesbury University, of Science Technology and Environment College, and of Science Food and Horticulture School. "A study of osmotic distillation in hollow fibre modul." THESIS_CSTE_SFH_Anh_V.xml, 2002. http://handle.uws.edu.au:8081/1959.7/4.

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Osmotic distillation is a process of removing water from an aqueous solution, driven by water vapour pressure gradient across a hydrophobic membrane. The process occurs at or below ambient temperature and under atmospheric pressure. This research project investigates the osmotic distillation process in hollow fibre modules using hollow fibres PP375, PV375 and PV660 supplied by Memcor Australia. Operating conditions such as temperature, feed concentration and brine cross flow velocity, but not the feed cross flow velocity, were found to have significant effect on the flux. Models for heat and m

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8

Shapiro, Michael Jay. "An experimental investigation of the thermal conductivity of thin-wall hollow ceramic spheres." Thesis, Georgia Institute of Technology, 1987. http://hdl.handle.net/1853/8667.

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9

Bokišová, Lenka. "Konstrukční řešení teplosměnné plochy a její zanášení u výměníků z dutých plastových vláken." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-230426.

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This thesis studies a possibility of using hollow fibres for construction of innovative heat exchangers. The first part introduces to the field of heat exchangers and polymers as materials suitable for formation of heat transfer surfaces. Further, the potential of hollow fibres of small diameters is outlined, including the merits, limits and proposals for improving. The significant part of the work is dedicated to the review of methods of fibres fixation and separation and review of fouling and cleaning of heat exchangers. Overviews of design possibilities which prevent fibres clustering have

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Ondrejka, Filip. "Nekonvenční chladicí systémy pro Formuli Student." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-444964.

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This master’s thesis deals with the design and manufacture of a heat exchanger with polymeric hollow fibers for a Formula Student vehicle. The work can be divided into three parts. The first part contains a review of heat transfer and heat exchangers, the second part deals with polymeric fiber heat exchangers design and manufacture of of polymeric hollow fibers heat exchanger with a heat exchanger for a Formula Student vehicle. The last part deals with the comparison of polymeric hollow fibers heat exchanger with the original aluminum heat exchanger and the evaluation of the measurement result

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11

Kůdelová, Tereza. "Fázové změny na povrchu tepelných výměníků s dutými vlákny." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-375535.

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The thesis focuses on the polymer hollow fibres heat exchangers. The main object of the research is the formation and process of condensation on the outer surface of fibres and the effect of phase change on the heat transfer. The study deals with the influence of the geometry of the heat exchnager on the heat transfer and the condensation process. Fatigue tests of polymeric hollow fibres exchangers are also part of the work. The work provides an overview of the possible use of such heat exchangers in industrial applications associated with condensation.

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12

Holle, Ann-Kathrin [Verfasser], and Stefan [Akademischer Betreuer] Blankenberg. "Klinische Evaluation des Heart Type Fatty Acid Binding Protein in der Diagnostik der frühen Phase des akuten Koronarsyndroms / Ann-Kathrin Holle. Betreuer: Stefan Blankenberg." Hamburg : Staats- und Universitätsbibliothek Hamburg, 2014. http://d-nb.info/1049281543/34.

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13

Sridi, Ahmed. "Modélisations thermomécanique et numérique du comportement de maçonneries en briques alvéolées en terre cuite sous chargements mécanique et thermique sévères." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLC047/document.

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Un des enjeux majeurs de la filière de construction en briques alvéolées est l’amélioration de la tenue au feu de hauts et ambitieux bâtiments, réalisés avec ces briques. L’objet de nos travaux est de développer des modèles thermo-mécaniques et des outils numériques suffisamment prédictifs pour orienter la recherche, par la simulation numérique, de produits améliorés vis-à-vis de la tenue au feu, permettant de diminuer le nombre de coûteux essais expérimentaux. Les contributions principales sont d’ordre méthodologique. Nous avons ainsi établi un dialogue entre les observations, les mesures et

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14

Hvožďa, Jiří. "Matematický model membránové destilace." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-445459.

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Diplomová práce se zabývá membránovou destilací, především z matematické perspektivy. Jedná se o tepelně poháněný separační proces, ve kterém se pro rozdělení kapalné a plynné fáze používá porézní membrána. Kapalina se vypařuje a její plynná fáze prochází přes póry v membráně. Během tohoto procesu dochází k tepelné i látkové výměně, které jsou popsány systémem parciálních diferenciálnich rovnic. Další model je založen na analogii s elektrickými obvody, zákonu zachování energie, hmotnostní bilanci a empirických vztazích. Je ověřen s experimentálně naměřenými daty z nové alternativní destilační

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15

Reynolds, Rema Ella. "Holla if you hear me giving voice to those we have missed : a qualitative examination of black middle class parents' involvement and engagement activities and relationships in public secondary schools /." Diss., Restricted to subscribing institutions, 2009. http://proquest.umi.com/pqdweb?did=1835603611&sid=1&Fmt=2&clientId=1564&RQT=309&VName=PQD.

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16

Jelínek, Roman. "Bytový dům ve Zlíně." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2013. http://www.nusl.cz/ntk/nusl-225804.

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The aim of this thesis is to elaborate project documentation for new construction of low-energy residential building with 16 luxury apartments, apartment without barriers and with pharmacy of basic type. It is a four-storey detached building without basement, with flat roof, roof terraces and with balconies. Residential building is located in one of the most enjoyable parts of the city of Zlín – Jižní Svahy II in the vicinity of Central park with bicycle path and with beautiful view of the Zlín. The building will be located on land plot No. 2144/46, where is still situated unfinished building

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17

Balasubramanian, Holly Ann. "Heat-mass-momentum transfer in hollow fiber spinning." Thesis, 2004. http://hdl.handle.net/2152/1477.

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18

Balasubramanian, Holly Ann Lloyd Douglas R. "Heat-mass-momentum transfer in hollow fiber spinning." 2004. http://repositories.lib.utexas.edu/bitstream/handle/2152/1477/balasubramanianh94421.pdf.

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19

Weinberg, Alon David. "Dialogue, displacement and return - contexts of a journey on a two-way road: Anishinaabek responses to all-weather roads through Waabanong Nakaygum: memory and continuity on the eastern shores of Lake Winnipeg and beyond." 2014. http://hdl.handle.net/1993/23243.

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East of Lake Winnipeg is what conservationists call the ‘east shore wilderness’ / ‘heart of the boreal.’ The largest contiguous tract of unindustrialized boreal forest on Earth, this area has been the focus of 15 years of discussion and planning in Manitoba. The area is also designated Waabanong Nakaygum, a homeland to the Anishinaabek of this bush-meets-lake region. Waabanong has seen limited access during the industrial period of personal mechanized mobility due to a lack of constructed all-weather roads. However, an older pattern of travel and mobility does exist across the land, for centu

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20

Chih-ChengHuang and 黃志誠. "Heat Conduction of Hollow Cylinders with Time-Dependent Boundary Conditions and Heat Convection Coefficients." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/71527168018617045126.

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博士<br>國立成功大學<br>機械工程學系碩博士班<br>101<br>The analytic solutions for the transient heat conduction by extending the method of shifting function in (I) functionally graded circular hollow cylinders with general time-dependent boundary conditions, and (II) uniform circular hollow cylinders with time-dependent boundary condition and heat convection coefficient are developed. The proposed solution method is free of integral transforms. Limiting studies and numerical analysis are given to illustrate the efficiency and the accuracy of the analysis. The influences of physical properties on the heat conduc

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21

Hsu, Hsiung-Chun, and 徐熊群. "Heat Transfer Measurements of Perforated Hollow Cylindrical Fins in Staggered Alignment." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/c83e6u.

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碩士<br>國立虎尾科技大學<br>機械與機電工程研究所<br>99<br>In this study, heat transfers of perforated hollow cylindrical fins in staggered alignment are experimentally measured. Both of the natural convections and impingement flows of four cases of fin structure are investigated. The fin structures are designed with 8 pins, 14 pins, 23 pins, and 33 pins, respectively; and the corresponding spacing ratio Sx is ranging from 1.7 to 0.9, respectively. As to the natural convection experiments, input powers are varied from 10W to 30W and its corresponding Rayleigh numbers are varied from 1 x 106to 5 x 106. Considering

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22

Wang, Meng-Ping, and 王孟平. "FORCED CONVECTIVE HEAT TRANSFER IN A RECTANGULAR HOLLOW OR POROUS CHANNEL." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/81558176442663752036.

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碩士<br>國立清華大學<br>動力機械工程學系<br>88<br>ABSTRACT A series of experimental investigations with a stringent liquid crystal transient method on the studies related to the convective heat transfer in hollow and porous channels have been successfully performed. For the study on the heat transfer in a rectangular hollow channel, the local spanwise-averaged Nusselt number decreases along the streamwise direction. A symmetric distribution of heat transfer coefficients in the spanwise direction has been verified; and a maximum Nusselt number exists at the center location of the test channel inle

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23

Wu, Yueh-Chan, and 吳岳展. "Two-Dimensional inverse problem in estimating heat sources of a hollow cylinder." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/74349280166561454988.

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碩士<br>國立中興大學<br>應用數學系所<br>102<br>This study is to pretict the heat sources of hollow cylinders inversely by a hybrid numerical method. First, the r and z domains are divided into equally small elements Δr and Δz, respectively. Next, one discretizes the governing equation through the second-order finite difference method. The Savitzky-Golay digital filter is then used to smoothen the measurement error. Then, substituting the thermal conductivity, boundary into the finite difference equations, and using MATLAB software to calculate inversely difference equations for heat sources. The results are

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24

Ma, Zhengyuan. "Mechanical properties of heat-treated and hot-dip galvanized rectangular hollow section material." Thesis, 2018. https://dspace.library.uvic.ca//handle/1828/10411.

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Hot-dip galvanizing is widely used for corrosion protection of steel structures. However, there has been a plethora of recent reports on premature cracking in galvanized steel structures, which have resulted in some early decommissions or even hazardous collapses. This research focuses on cold-formed Rectangular Hollow Sections (RHS). A total of 108 tensile coupons were tested to investigate the effects of galvanizing as well as different pre-galvanizing treatments on the material properties around the cross sections of the specimens. For the first time, this thesis reports a comprehensive mea

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Ciou, Yong-Sheng, and 邱永勝. "Effect of heat treatment on the pervaporation performances of PAN hollow fiber membrane." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/p7ah7a.

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碩士<br>中原大學<br>化學工程研究所<br>92<br>In this study, Heat-treated polyacrylonitrile (PAN) hollow fiber membranes were prepared by heat-treating the PAN precursor hollow fiber membrane with different heat-treatment conditions. The influence of heat-treatment conditions on the pervaporation performances of aqueous isopropanol (IPA) solution through heat-treated PAN hollow fiber membranes were investigated. It shows that the permeation rate decreases and the water content in permeate increases with increasing heat-treatment temperature in the range of 60-180 OC. Nevertheless, the permeation rate increa

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MIN-LANG, YANG, and 楊敏郎. "Study on lightweight concrete hollow bricks used in buildings for improve heat insulation and waterproofing." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/01932276467463568538.

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碩士<br>建國科技大學<br>土木與防災研究所<br>100<br>An increase in global temperature causes glaciers to melt and the sea levels to rise. The rainfall is not regular, either drought or heavy rain,which caused tremendous disaster. Taiwan is located in East Asia, where is in the sub-tropical climate zone.The land is affected by the continental and marine climate patterns In Taiwan from April to May are the plum rain seasons while June and July for the afternoon rainstorm, then in July, August and September are typhoon season. With the increasing rainfall, the roof of the building would withstand a direct impact.

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27

YE, RONG-PENG, and 葉榮鵬. "Temperature distribution and thermal stress analysis of a hollow cylinder subject to a moving heat source." Thesis, 1986. http://ndltd.ncl.edu.tw/handle/80701483816786263802.

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28

Li, Shi-Wei, and 李世偉. "Effect of spinning condition on membrane morphology and pervaporation performance of heat-treatment PAN hollow fiber membranes." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/29804328127254273185.

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碩士<br>中原大學<br>化學工程研究所<br>99<br>In this study, stabilized polyacrylonitrile(PAN) hollow fiber membranes were fabricated by heat-treating dry/wet spun asymmetric PAN hollow fiber membrane. The effects of spinning conditions(such as Dope solution concentration, air gap, bore liquid composition)as well as heat-treatment process(temperature and time)on the morphology of PAN hollow fiber membrane and pervaporation performances of 90 wt.% aqueous ethanol solution through hollow fiber membrane were investigated. The results showed that the pure water flux decreased but the permeation rate increased

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29

Chen, Bo-Syun, and 陳柏勛. "The study of heat-treatment on the morphology and pervaporation performances of PI/PAN hollow fiber membranes." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/11588959275810605511.

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碩士<br>桃園創新技術學院<br>材料應用科技研究所<br>100<br>In this study, the effect of spinning and heat-treatment on the morphology and aqueous alcohol solution pervaporation performances of Polyimide (PI)/ Polyacrylonitrile (PAN) hollow fiber membranes were investigated. Three kinds of hollow fiber membranes were fabricated in this study such as PI/PAN dual-layer hollow fiber membranes, PI/PAN blend hollow fiber membranes and PI/PAN hollow fiber membranes with various solvent systems. The results show that the PI/PAN dual-layer hollow fiber membranes were delaminated after heat-treatment. The pervaporation perf

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30

Wu, Jin-Rong, and 吳進榮. "Conjugated Heat Transfer Analysis of Wall Conduction and Mixed Convection for Non-Newtonian Fluids over Vertical Slender Hollow Cylinders." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/19517362403370081710.

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碩士<br>明志科技大學<br>機電工程研究所<br>101<br>In this thesis, the steady laminar convective heat transfer of non-Newtonian fluids flowing over a vertical slender hollow cylinder has been investigated. By considering the interaction between wall conduction and mixed convection, an analysis is presented to study the conjugate heat transfer characteristics. In addition, the power-law model is used for non-Newtonian fluids with exponent n < 1 for pseudoplastics fluids, n = 1 for Newtonian fluids, n > 1 for dilatant fluids. A conjugate heat transfer parameter is proposed as control indicators to show the impac

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31

Dai, Xianghe, and Dennis Lam. "Shape effect on the behaviour of axially loaded concrete filled steel tubular stub columns at elevated temperature." 2012. http://hdl.handle.net/10454/5883.

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Concrete filled steel tubular columns have been extensively used in modern construction owing to that they utilise the most favourable properties of both constituent materials. It has been recognized that concrete filled tubular columns provide excellent structural properties such as high load bearing capacity, ductility, large energy-absorption capacity and good structural fire behaviour. This paper presents the structural fire behaviour of a series of concrete filled steel tubular stub columns with four typical column sectional shapes in standard fire. The selected concrete filled steel tube

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32

Wang, Yu-Liang, and 王友良. "Holler If You Hear Me: Taiwanese Hip Hop Music under the Transnational Cultural Flow in East Asia." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/44gyb8.

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碩士<br>國立臺灣師範大學<br>英語學系<br>103<br>Abstract The thesis focuses on the transnational collaborations of Taiwanese hip hop music in East Asia. Over the past twenty years, Taiwanese hip hop music has transformed from the stages of initial imitation and appropriation of the music form, the domestication of local culture to the present transnational crossover collaborations among East Asian countries. Transnational Taiwanese hip hop music brings abundant cultural diversity and flow and also presents the possibility of “trans-Asian” hip hop. The thesis consists of three chapters. The first chapter pro

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Cooper, Theressa N. "“Holla if you hear me”: A Conversation with Black, inner-city youth on career preparedness programs." 2010. http://trace.tennessee.edu/utk_graddiss/874.

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This research study specifically addressed; how vocational preparedness programs effect the career aspirations of Black youth, within the context of the Middle Tennessee Council Boy Scouts of America’s Exploring program. The goal of this research is to represent Black youth participating in a vocational preparedness program. Interviews, journals, and rich, thick descriptions are utilized in this work. Using the lens of narrative inquiry and cultural studies, I hoped to further the field of career development through the experiences of some of its key players, African American youth. Within t

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