196,023 research outputs found
Tallinna Tehnikakõrgkooli toimetised nr 22
No full textKogumik sisaldab TTK õppejõudude artikleid ja annab ülevaate uurimistööderühmade rakendusuuringutest. Ehitusalaste uuringute valdkonnas on kirjeldatudmerekonteineri klaasfiibriga tugevdatud põrandalaudade arendustööd (M. Kiisa,K. Lellep). Logistikavaldkonnas on käsitletud ülevaateuurimusena ohtlike kaupadeveoahela riskide tuvastamist ja uurimist vedaja vaatenurgast (J. Janno). Rõiva- jatekstiiliala tehnoloogia uutest arendustest räägib artikkel tarkadesthobusetekkidest (A. Traumann). Nutikaid elektritehnilisi insenerilahendusi käsitletudartiklis on võrreldud toroidmähise tehnilisi näitajaid püsimagnet-sünkroonmasinateslevinumate kahekihilise kontsentreeritud mähise vähendatud mudelinäitajatega (R. Nukki).Innovaatilisi lahendusi on käsitletud energiasalvestussüsteemide arengus eri massigaõhusõidukitel (T. Kangro) ning pinnete ja materjalide tehnoloogias (T. Pihl).Planeerimisala valdkonda on analüüsinud T. Tammik artiklis „Planeering kuiühiskondlik kokkulepe”
Dr. Duane M. Jackson, Morehouse College, July 2011
No full textThis video is a conversation with Dr. Duane M. Jackson. Dr. Jackson talks about his paper, "Recall and the Serial Position Effect: The Role of Primacy and Recency on Accounting Students' Performance." Jackie Daniel, AUC Woodruff Library, is the interviewer
"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States" By M. Carey.
No full text"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States: containing bried sketches of the moral and political character of those states.
By M. Carey, member of the American philosophical, and of the American Antiquarian Society, and author of The Olive Branch, Cindiciae Hibernicae, essays on banking, on political economy, and on internal improvement.
To which are now added the English editor's comments on the subject; together with Important Advice to Emigrants, and Cautions Against Impositions Practiced in the Outports
Body mass index does not predict prostate-specific antigen or percent free prostate-specific antigen in men undergoing prostate cancer screening
No full textObjectives: Body mass index (BMI) may alter serum prostate specific antigen (PSA) and percent free PSA (%fPSA) and may mask the risk of prostate cancer. We investigated the relationship between BMI and PSA or %fPSA. Materials and methods: Height, weight, PSA and %fPSA were assessed in 616 consecutive screened men without prostate cancer. Continuously coded and categorised BMI was studied. Statistical analyses consisted of ANOVA, linear regression, bivariate and partial correlations. Results: Median age was 57 years. Median PSA was 1.0 and median %fPSA was 26. Median BMI was 25.8 kg/m(2). Neither continuously coded nor categorised BMI correlated with either PSA or %fPSA in unadjusted or age-adjusted analyses (all p values >= 0.3). Conclusions: Body mass index does not affect PSA or %fPSA in men without known prostate cancer, who undergo prostate cancer screening. Therefore, PSA or %fPSA-based screening or early detection efforts do not require an adjustment for BMI. (c) 2007 Elsevier Ltd. All rights reserved
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Dr. Glendon Swarthout
No full textHosted by Roger M. Busfield, MSU Assistant Professor of Speech and Theater, Meet the Author is designed to introduce a general audience to a contemporary author and their work through in-depth interviews. This episode features a conversation between Dr. Glendon Swarthout, prolific author and English professor at MSU, and assistant professors Sam S. Baskett and Theodore B. Strandness
Improving Quality of Sample Production Process with Particular Reference to AS M
No full textKäesolevas lõputöös käsitletakse AS M.A.S.I Company näidiste valmistamise protsessi ning selle kvaliteedi parendamist läbi väärtust lisamise analüüsi. Lõputöö eesmärk sai täidetud ning ettevõtte juhtkonnale on loodud ettepanekud antud protsessi parendamiseks. Töö teoreetilises osas andis autor ülevaate kvaliteedist ning selle juhtimisest, mis on kvaliteedijuhtimise põhielemendid ja miks on kvaliteedijuhtimine ettevõttele vajalik. Samuti andis töö autor ülevaate kulusäästlikust tootmisest ehk Lean tootmisest – miks oleks vaja seda ettevõttes juurutada ning kuidas see aitaks tõsta kvaliteeti tervikult. Autor andis ülevaate ka protsesside olemusest, tuvastamisest ja avastamisest ning protsesside analüüsist ja ümberkavandamisest. Autor on arvamusel, et kui hakata ettevõttes kvaliteeti parandama peaks alustama ettevõtte sisekultuuri parendamisest. Pika ajalooga ettevõttel on oluline välja tulla oma mugavustsoonist ning sisse viia uuendused. Tihti jäädakse peatuma varem toiminud võtetele, kuid kuna maailm on pidevas muutumisest, siis varem toiminud protsessid ei pruugi aastaid hiljem olla kuigi produktiivsed. Järgmiseks oluliseks etapiks on protsesside tuvastamine ning avastamine. Oluline on ära kaardistada kõik ettevõtte põhiprotsessid ning läbi tuleks viia põhjalik analüüs. Protsessidest tuleks eemaldada kõik klientidele väärtust mitte loovad tegevused, olgu need siis sise- või väliskliendid. Kui protsessidest on eemaldatud kõik ressurssi raiskavad tegurid, siis on väiksem tõenäosus ka defektide esinemine toodetes. Selleks, et rakendada käsitletud teooriat töö praktilises osas, tutvus autor AS M.A.S.I Company näidiste valmistamise protsessiga. Eesmärgi täitmiseks viis autor läbi vaatluse ning kaardistas protsessi BPMN vooskeemi abil. Lisaks viis autor läbi ka intervjuu tootearendusmeistriga selleks, et välja selgitada protsessi probleemsed etapid. Teoorast selgus, et oluline on väärtust lisava analüüsi puhul kaasata ka igapäevaselt protsessis osalevaid inimesi. Analüüsist lähtuvalt on tehtud ettepanekud ettevõtte juhtkonnale protsessi parenduseks. Analüüsist selgus, et AS M.A.S.I Company suurimaks ressursiraiskajaks töö ebaefektiivne jaotus ning osakondade vahelised ootamised. Ootamist tingib näidiste valmistamise etappide osakondade vaheline jaotus. Lisaks veel tootmishoone mitmetasandilisusest tingitud transportimised ning töötajate ülekoormus. Analüüsist tulid välja ka ettevõtte üldised probleemid mis mõjutavad kogu ettevõtte tegevust. Nendeks on töötajate mittepiisav koolitamine, tootmise masinapargi vananemine ning keelebarjäärist tingitud infosulg. Infosulgu tekitab ettevõttes ka hierarhiline struktuur ning ühtse meeskonna tunde puudumine. Autor tegi ettepanekud viia juurdelõikus ja materjalide ladu, mis asuvad tootmishoone esimesel korrusel, tootearendusosakonda. Tootearendusosakonnas on kõik vajalikud seadmed juurdelõikuse teostamiseks olemas, seega selles osas ettevõtte lisakulutusi ei kaasneks. Selleks, et tootearendusosakonnas juurdelõikust teostada oleks vaja ühte lisa inimest. Lisa inimese vajadust kinnitab ka tootearendusmeister ning see, et tihti võetakse tootmisliinist lisa inimesi näidiste õmblemiseks juurde. Autor on arvamusel, et juurdelõikuse ja materjalide lao tootearenduseosakonda viimine vähendaks oluliselt transpordile ning ootamisele kuluvat aega ning protsess muutuks efektiivsemaks. Kangaste ja tarvikute tellimise osas tegi autor ettepaneku kaasata ostja näidiste disainimese etappi algusest peale. See on vajalik selleks, et kangaste ja tarvikute tellimisel oleks ostjal kohe kogu vajalik info olemas ning ära jääks ostja ja disaineri vaheline pidev e-kirjade saatmine. Samuti oleks sellisel juhul võimalik kõik kangad ning tarvikud vastavalt näidiste valmistamise plaanile kohe tellida. Protsessist tuleks eemaldada ka korduvtegevused. Lisaks tegi autor ettepaneku ettevõttes kulusäästliku tootmise ehk Lean tootmise ning Demingi ringi kasutusele võtmise. Vajalik oleks ka töötajate pidev koolitamine ning inglise keele kasutusele võtmine kogu ettevõttes. Inglise keel on vajalik, kuna emaettevõte ja tütaretevõte asuvad erinevates riikides. Antud töö raames viis autor läbi protsesside elutsükkli kolm esimest etappi, mis hõlmasid endas protsessi avastamist, protsessi analüüsi ning protsessi ümberkavandamist. Selleks et protsessi ümberkavandamine ettevõttesse juurutada oleks vaja läbi viia ka protsesside elutsükkli kaks viimast etappi, mis on seotud uue protsessi rakendamise ja kontrollimisega. Selleks, et parendada kogu ettevõtte toimivust ning kvaliteeti tuleks kaardisatada ja analüüsida kõiki ettevõtte protsesse ning seejärel juurutada kvaliteedijuhtimissüsteem.In this graduation thesis, the sample production process and improving its quality through a value added analysis at AS M.A.S.I Company are investigated. The aim of the thesis was achieved and the company’s management has been presented with proposals for improving the process. In the theoretical part of the thesis, the author provided an overview of quality and quality management, the key elements of quality management, and highlighted reasons why quality management is necessary for a company. The author also gave an overview of cost-effective or lean production – why it would be necessary to introduce it in a company and how it would fully help to ensure quality. The author also gave an overview of the nature, identification and discovery of processes, as well as an overview of process analysis and process redesign. The author believes that improving quality in a company should start with improving the company’s internal culture. It is important for a company with a long history to come out of its comfort zone and introduce innovations. Often, companies hold on to the ways that have been effective, but as the world is constantly changing, the processes that worked before may not be as productive years later. The next important step is identifying and detecting processes. It is important to map all company’s key processes and carry out a thorough analysis. All non-value-adding activities for customers should be removed from processes, be they internal or external customers. When all factors that waste resources are removed from the processes, there is less probability of defects, as far as production is concerned. In order to apply the above described theory in the practical part of the work, the author investigated the sample producing process at AS M.A.S.I Company. To achieve the aim, the author performed an observation and mapped the process, using the Business Process Modelling Notation (BPMN) flowchart. In addition, the author interviewed the product development engineer in order to identify the problematic stages of the process. The theory revealed that when carrying out a value-added analysis, it is important to include people involved in the day-to-day process. Based on the analysis, proposals have been made to the company’s management to improve the process. The analysis revealed that at AS M.A.S.I Company, the main waste of resources are the ineffective division of labour and too much waiting in the units. Waiting is caused by the fact that the phases of sample preparation are divided between the units; in addition, there are transport-related activities due to the multi-level production building and work overload. The analysis also revealed the company’s general problems that affect all activities in the company. They include inadequate training of staff, old production machinery and lack of information because of the language barrier. The lack of information is also caused by the company’s hierarchical structure and absence of unified teamwork. The author proposed that the cutting unit and materials store, located on the ground floor of the production building, should be transferred to the product development department. The latter has all the necessary equipment for carrying out cutting, so there will be no additional costs for the company in this area. In order to carry out the cutting in the product development department, only one extra person would be needed. The need for an extra person is also confirmed by the product development expert and the fact that often people from the production line are displaced, to sew samples. The author believes that moving the cutting unit and material store to the product development department would significantly reduce time for transport and avoid waiting, and the process would be more efficient. As regards ordering of fabrics and supplies, the author made a proposal that the buyer in the sample design phase should be involved right in the beginning. This is necessary, because upon ordering the fabrics and supplies, the buyer can immediately have all information needed, and there will be no continuous e-mails between the buyer and the designer. Then, it would also be possible to order all fabrics and supplies immediately according to the sample production plan. Besides, repetitive activities should be removed from the process. In addition, the author suggested lean production should be introduced in the company, as well as the Deming Circle. It would also be necessary to continuously train staff and start using English in the entire company. English is required because the parent company and subsidiary company are located in different countries. In the framework of this study, the author passed through the first three phases of the life cycle of the processes, which included process discovery, process analysis and process redesign. In order to introduce process redesign in the company, it would also be necessary to pass through the last two phases, associated with the implementation and control of a new process. In order to improve the overall performance and quality in the company, it should be necessary to map and analyse all processes in the company and then introduce a quality management system
Simulation of thermal plant optimization and hydraulic aspects of thermal distribution loops for large campuses
No full textFollowing an introduction, the author describes Texas A&M University and its utilities system. After that, the author presents how to construct simulation models for chilled water and heating hot water distribution systems. The simulation model was used in a $2.3 million Ross Street chilled water pipe replacement project at Texas A&M University. A second project conducted at the University of Texas at San Antonio was used as an example to demonstrate how to identify and design an optimal distribution system by using a simulation model. The author found that the minor losses of these closed loop thermal distribution systems are significantly higher than potable water distribution systems. In the second part of the report, the author presents the latest development of software called the Plant Optimization Program, which can simulate cogeneration plant operation, estimate its operation cost and provide optimized operation suggestions. The author also developed detailed simulation models for a gas turbine and heat recovery steam generator and identified significant potential savings. Finally, the author also used a steam turbine as an example to present a multi-regression method on constructing simulation models by using basic statistics and optimization algorithms. This report presents a survey of the author??s working experience at the Energy Systems Laboratory (ESL) at Texas A&M University during the period of January 2002 through March 2004. The purpose of the above work was to allow the author to become familiar with the practice of engineering. The result is that the author knows how to complete a project from start to finish and understands how both technical and nontechnical aspects of a project need to be considered in order to ensure a quality deliverable and bring a project to successful completion. This report concludes that the objectives of the internship were successfully accomplished and that the requirements for the degree of Degree of Engineering have been satisfied
Intern experience at CH���M Hill, Inc.: an internship report
No full textIncludes author's vita"Submitted to the College of Engineering of Texas A&M University in partial
fulfillment of the requirement for the degree of Doctor of Engineering."Includes bibliographical referencesA review of the author's internship experience with CH���M HILL, Inc.
during the period September 1975 through May 1976 is presented. During this nine month
internship the author worked as an Engineer II in the Industrial Processes discipline of this
large consulting engineering firm... The author's prime responsibility was as one of three
lead design engineers on the design of a large wastewater treatment facility for a pulp mill
in Hoquiam, Washington owned by ITT Rayonier Inc. The work generally consisted of the design
of individual treatment units and associated piping and pumping. The purpose of the project
was to provide wastewater treatment capabilities that would satisfy the effluent limitations
(standards) imposed upon the mill by the State of Washington Department of Ecology and the
U.S. Environmental Protection Agency. The author's assignment also entailed necessary
interaction with the project manager and other CH���M HILL design engineers and support staff
members, the client's representatives, and representatives of two other consulting engineering
firms working on the project. Thus, the internship position at CH���M HILL provided considerable
experience coordinating the author's work with the work of other engineers, guiding the design
and administrative efforts of a support staff, and interacting regularly with the client and
other consulting firms. This broad exposure to a variety of engineering and organizational
problems provided a valuable educational experience
Transition to turbulence in a qblique shock-wave/boundary-layer interaction at M=15
No full textDirect numerical simulations are carried out for different forcing techniques to trigger transition during the interaction between an oblique shock-wave and a laminar boundary-layer at M = 1.5. Three forcing methods are used: a) forcing of oblique unstable modes, whose shape and behaviour are determined by the local linear stability theory, b) broadband free-stream acoustic disturbances, and c) a cold plasma flow control device. While the oblique-mode breakdown is dominant for low-amplitude forcing, long streaky structures drive the transition process in a high-amplitude disturbance environment. LES are also performed on the experimental setup by the Institute of Theoretical and Applied Mechanics (ITAM) from Novosibirsk State University with cold plasma actuation. As well as the disturbance type, the effect of Reynolds number and forcing amplitude will be investigated
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