1,720,953 research outputs found
Optimizing Demand-Driven Material Flow in the Assembly Line on the Example of Hanza Mechanics Tartu AS
No full textEttevõtte koostetehases liiguvad materjalid koosteliinidele peamiselt läbi komplekteerimise ning tootmises olevate vaheladude kaudu. 76% teravilja niiskusanalüsaatori koosteliinis kasutatavatest materjalidest võetakse tootmise asukohtadest, mistõttu on sujuva materjalivoo tagamiseks oluline, et sellised materjalid oleksid alati vahelaos olemas õiges koguses, õigel ajal ning õiges asukohas. Puudulike vahelaoprotsesside tõttu ei ole need materjalid alati riiulitest leitavad ning seetõttu peavad täiendamisprotsessi sekkuma tootmistöötajad, tekitades sellega koosteliinis lühiajalisi tootmisseisakuid.
Lõputöö eesmärgiks oli kaardistada koosteliinis kasutatavate materjalide tehasesisene liikumisteekond, tuvastamaks vahelao kasutamisega tekkivad kitsaskohad ja nende juurpõhjused. Püstitatud eesmärk oli Hanza Mechanics Tartu AS jaoks vajalik seetõttu, et selgitada kahe kasutuses oleva täiendamismeetodi positiivseid ja negatiivseid külgi ning tuua välja vahelao kasutamisega tekkivad probleemid ning kriitilised aspektid, mille tõttu kulutatakse täna ressursse ja väärtusloovat aega. Tänu kitsaskohtade tuvastamisele on ettevõttes võimalik planeerida parendustegevusi, mille läbi hoida kokku kulusid ning parendada materjalide planeerimist.
Lõputöö empiirilises osas kaardistati koosteliini tootmisvoog ning vahelaoga seonduvad ülesanded ja kitsaskohad. Läbi struktureerimata intervjuude ja tööpäeva vaatluste koostati tänane koosteliini materjalide liikumisteekond. Samuti kaardistati vahelaos olevate laoartiklite hetkeolukord ning nende liikumine vahelao, põhilao ja töökohtade vahel.
Liikumiskannete analüüsimisel selgus, et täitmiskogused olid ebaregulaarsed ja riiulitesse ei viidud sellist kogust, mis sinna tegelikult mahuks. Madalad täitmiskogused tõid kaasa endaga tihedad täitmisvajadused. 2023. aastal teostati üle kuue tuhande vahelao täitmise, millest Perten tootmisala töötajad kulutasid kanban materjalide täiendamistellimuste edastamisele umbes 50 tundi väärtustloovat aega. Samuti selgitati lõputöös välja vahelao kasutamisega tekkivad kitsaskohad:
• Materjali tellimuspunktide määramisel ei ole võetud arvesse olulisi tegureid, mis mõjutavad laosaldo täpsust ja seetõttu võib toimuda ebatäpsete täiendtellimuste edastamine. Tellimuspunkt on määratud tehnoloogi enda soovi järgi.
• Kasutuses olevad täitmismeetodid ei võimalda täita vaheladusid maksimaalse tasemeni.
• Vahelao protsesside ohje on puudulik ning puudub teave hetkeolukorrast, mistõttu esineb puudusi nii laoartiklite haldamisel kui ka protsesside ülesehituses.
Tulevikus võiks ettevõte analüüsida ka teiste koosteliinide vaheladude kasutuspõhimõtteid ning rakendada tehtud ettepanekuid üle tehase ka teistesse koosteliinide vaheladudesse.In the assembly factory, the assembly line material feeding is primarily done through kitting and by production kanban shelves. 76% of the materials used in the assembly line are sourced from the production kanban location. To ensure a smooth material flow, it is essential that materials in the kanban location are always available in the correct quantity, at the right time, and in the right location. Unfortunately, in some cases, materials in the production shelves are not always available, requiring assembly line workers to intervene in the replenishment process, thereby causing temporary production downtime on the assembly line.
The aim of the graduation thesis was to map the internal movement pathway of assembly line materials in order to identify bottlenecks and root causes during the movement. The set objective was necessary for Hanza Mechanics Tartu AS to elucidate the positive and negative aspects of two replenishment methods in use, and to highlight the problems and critical aspects arising from the use of kanban shelves, which currently waste resources and value-added time. Thanks to the identification of the bottlenecks, the company can plan improvement activities to save costs and enhance material planning.
In the empirical part, the production flow of the assembly line and the tasks and issues related to the production kanban shelves were mapped out. Through unstructured interviews and process observations, the current flowchart of materials in the assembly line was compiled. Additionally, the current status of kanban materials, and their movement between the kanban shelves, warehouse, and assembly line was mapped out.
Upon analyzing the stock movement transactions, it was found that fill quantities were irregular, and shelves were not stocked with amounts that would actually fit. In 2023, over six thousand replenishments were performed, with Perten production area employees spending approximately 50 hours of value-added time on transmitting kanban material replenishment orders. The identified bottlenecks were:
• Essential factors affecting inventory accuracy were not taken into account when determining material reorder points, leading to inaccurate replenishment orders.
• Existing replenishment methods do not allow for filling the shelves to maximum levels.
• Kanban process design is inadequate, and there is a lack of information on the current situation.
In the future, the company could implement the proposals, what was made, across the factory
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
Author Under Sail The Imagination of Jack London, 1893-1902
No full textIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Intro -- Title Page -- Copyright Page -- Dedication -- Contents -- Acknowledgments -- Introduction -- 1. Spirit Truth -- 2. From Absorption to Theatricality and Back Again -- 3. "I Will Build a New Present" -- 4. Sons as Authors -- 5. Fathers as Publishers -- 6. The Daughter as Author -- 7. Lovers as Authors -- 8. At Sea with the Family -- 9. Yellow News, Yellow Stories -- 10. The Return Home -- Notes -- Bibliography -- Index -- About Jay WilliamsIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Description based on publisher supplied metadata and other sources.Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, YYYY. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries
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