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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
181

Validating Machine and Human Decision-Making in Forensic Fire Debris Analysis

Whitehead, Frances A 01 January 2024 (has links) (PDF)
This work presents a background on the chemical complexity of fire debris analysis, including an ever-present matrix of pyrolysis products as the catalyst that led to the creation of the National Center for Forensic Science's Fire Debris Database. A selection of these 1,000+ casework-relevant ground truth samples was used to create two newly proposed analyst workflows to connect the current method of categorical reporting with evaluative reporting practices reflective of the strength of the evidence. Both workflows use linear sequential unmasking to help mitigate bias, a discrete scoring system for quantification of the analysis, and receiver operating characteristic (ROC) curves to bridge together categorical and probabilistic reporting by indicating the optimum decision threshold the analysts are operating from when they make a decision. Both workflows also allow a machine-learning component to be included in evaluating the evidence and are practical methods for obtaining validated performances for human and machine decisions. The second workflow includes subjective logic, which provides a means of determining the uncertainty inherent to the opinion made by the analyst and the machine learning computational model. ‘Fuzzy categories' and an opinion triangle connect the opinion offered by the analyst given their perceived uncertainty to the ROC curve so a categorical decision can be made. For each workflow, three analysts independently assessed 20 randomly chosen samples from the Fire Debris Database and followed the ASTM E1618-19 standard fire debris analysis method. The resultant area under the ROC curve for each analyst for each workflow was 0.90 or higher, indicating that all were in the very good to excellent range for diagnostic classifiers, as was the machine learning model tested in the second workflow. Recommendations for implementing a performance validation workflow, how repetitive engagement can help the individual analyst and insights on using these for performance validation and training purposes are also included.
182

Hodnocení efektivity marketingových kampaní / Evaluation of the effectiveness of marketing campaigns

HOUŠKOVÁ, Šárka January 2017 (has links)
The goal of the dissertation called "Evaluation of the effectiveness of marketing cam-paigns" is to describe, analyze, and with usage of Data Envelopment Analyst (DEA) to evaluate certain campaigns. The dissertation describes political election campaigns of certain political party.
183

會計師忙碌程度與審計品質關聯性之研究──學習與互斥之效果 / The relationship between audit partner busyness and audit quality : learning effect or crowding-out effect

劉佳穎, Liu, Chia Ying Unknown Date (has links)
本研究以台灣上市櫃公司及分析師投資報告為研究對象,探討會計師忙碌程度與審計品質之關聯性,以及產生學習或互斥效果。審計品質以裁決性應計項目、財務報表重編及迎合或擊敗分析師預期三種特性進行分析。 研究結果發現,會計師忙碌程度與裁決性應計項目、財務報表重編及迎合或擊敗分析師預期皆呈現顯著負相關。此結果表示,會計師忙碌程度愈高,受查公司管理當局進行盈餘管理之可能性愈低。本研究藉此結果推論,會計師忙碌程度愈高,透過累積查核經驗,促進知識改善,產生正向的學習效果,進而提高審計品質。 / This thesis examines the association between the busyness of auditors at partner level and audit quality and whether the association stems from learning effect or crowding-out effect, by using the listed firms’ data and the analysts’ reports in Taiwan. I use the following three measures of audit quality to examine my hypotheses: discretionary accruals, financial restatement, and meet or beat analyst forecast. The empirical results indicate that firms experience lower discretionary accruals, are less likely to restate financial statements and have lower likelihood of meeting or beating analysts’ expectations when auditors are busier. The results are consistent with the notion that auditor busyness is positively related to audit quality. Taken together, the findings provide strong evidence in favor for learning effect rather than crowding-out effect of auditor busyness. Further analyses reveal that the results remain unchanged, regardless of lead auditor busyness or concurring auditor busyness.
184

Analogové elektronické emulátory obvodů neceločíselného řádu / Analogue emulators of fractional-order circuits

Kubát, Pavel January 2021 (has links)
Diploma thesis deals with circuits contain fractional-order elements. The first part of this paper deals with this problem, there were also described methods of design fractionalorder elements and types of circuits containing the fractiona-order elements which can be applied in practice. Used active elements for practical part can be found in the second chapter. Design of GIC circuits and implementation of fractional-order element inside the circuit are shown in the last chapture. Parasitic analysis and stability of frequency filter containing fractional-order element had been also described.
185

Effects of regulatory policies on bank-specific risk and financial stability

Ludolph, Melina 23 August 2021 (has links)
Diese Arbeit umfasst drei unabhängige Aufsätze, welche die Auswirkungen verschiedener regulatorischer Maßnahmen auf das Bankenrisiko und/oder die Finanzstabilität untersuchen. Zunächst wird der Einfluss von Eigenkapitalanforderungen auf den Zusammenhang zwischen Bankgröße und Volatilität analysiert. Unsere Panel-Datenanalyse zeigt, dass strengere Eigenkapitalanforderungen den Nexus zwischen Größe und Volatilität schwächt. Große Banken haben, ceteris paribus, einen weniger volatilen Kreditbestand, wenn sie strengerer Kapitalregulierung ausgesetzt sind. Gemäß dem Granularitätskonzept kann dies ebenfalls die makroökonomische Stabilität erhöhen. Als Nächstes untersuche ich, ob MiFID II die frühzeitige Informationsweitergabe über Änderungen von Analystenempfehlungen an einzelne Anleger, genannt Tipping, reduziert hat. Die Ergebnisse zeigen, dass die absoluten Renditen und Handelsvolumina einen Tag vor Veröffentlichung einer Hoch- oder Herabstufung vor und nach Inkrafttreten von MiFID II signifikant ansteigen. Da die Aktienkurse am Veröffentlichungstag weiter steigen bzw. fallen, profitieren ausgewählte Anleger trotz der regulatorischen Änderung weiterhin von einem Informationsvorteil. Dies hat vermutlich negative Auswirkungen auf den Finanzmarkt insgesamt. Zuletzt untersuche ich wie sich die Ausgabe von Contingent Convertible (CoCo) Anleihen, die als regulatorisches zusätzliches Kernkapital (AT1) geltend gemacht werden können, auf das Bankenrisiko auswirkt. Meine Analyse zeigt, dass AT1-CoCo-Anleihen ein bis drei Jahre nach Ausgabe zu einem signifikant höheren Bankenrisiko führen. Übereinstimmend mit theoretischen Studien deutet dies darauf hin, dass CoCo-Anleihen ihr Potenzial zur Stärkung der Eigenkapitalbasis der Banken durch die regulatorischen Anforderungen genommen wurde. / This thesis comprises three independent essays evaluating the impact of different regulatory policies on bank risk and/or financial stability. First, we examine the effects of capital regulation on the link between bank size and volatility. Our panel data analysis reveals that more stringent capital regulation weakens the size-volatility nexus. Hence, large banks show, ceteris paribus, lower loan portfolio volatility when facing more stringent capital regulation. According to the granularity concept, that can increase macroeconomic stability. Next, I evaluate if MiFID II reduced the early information disclosure on analyst recommendation changes to selected investors - so-called tipping. I find absolute returns and turnover rise significantly on the day preceding the up- or downgrade release before and after MiFID II became law. Given that stock prices move further in the revision direction on publication day, selected investors continue to profit from an informational advantage, notwithstanding the regulatory change. That is likely harmful to the financial market overall. Lastly, I examine the impact of issuing contingent convertible (CoCo) bonds that qualify as regulatory additional tier 1 (AT1) capital on bank risk. My treatment effects analysis reveals that issuing AT1 CoCo bonds results in significantly higher risk-taking one to three years after the issuance. That is in line with previous theoretical studies suggesting that regulators have stripped CoCo bonds of their potential to strengthen the banks’ capital bases.
186

Controllerns roll : Från generalisering till nyansering / The controller role : From generalization to nuance

Samuelsson, Louise, Bergström, Mikael January 2019 (has links)
Examensarbete, civilekonomprogrammet inriktning Controller, Ekonomihögskolan vid Linnéuniversitetet, Växjö.  Kurskod 4FE18E, 30hp, VT2019   Författare: Mikael Bergström och Louise Samuelsson Handledare: Elin Funck   Titel: Controllerns roll - från generalisering till nyansering   Bakgrund: I takt med att företagen och dess ekonomistyrning utvecklats sägs controllerrollen gått från att vara en beancounter till en affärsinriktad business partner. Det finns dock en oenighet i hur, och hur långt, utvecklingen skett och argument har förts fram att det fullständiga skiftet inte materialiserats utan att det istället är en hybridiserad roll som syns. Trots att det öppnats upp för att det är en heterogen roll har det linjära tänket kring rollens utveckling lett till generaliseringar och otydligheter i hur rollen beskrivs.   Syfte: Syftet med denna studie är att identifiera olika faktorer som påverkar rollen för controllers samt förklara hur dessa faktorer påverkar controllers i olika riktningar och mot olika roller. Ambitionen och det övergripande syftet är därmed att generera en djupgående kunskap och förståelse samt att nyansera bilden av controllerrollen.   Metod: Studien centrerar kring en kvalitativ intervjustudie av studieobjektet controllers. Semistrukturerade intervjuer har genomförts med controllers på tre stora företag inom den tillverkande sektorn för att ge en relevant bredd till det empiriska materialet.   Slutsatser: Ett bidrag ges till teorin dels genom resultatet som visar att det är en hybridiserad roll som återfinns men också genom att olika faktorer som påverkar rollen har identifierats samt diskuterats och använts för att nyansera och urskilja olika inriktningar av rollen utifrån vilken nivå eller position controllern jobbar på. Förväntningar och uppfattningar ses påverka genom att möjliggöra och öppna upp för en bred och inkluderande roll och erfarenhet ses påverka arbets- och förhållningssättet till att bli mer aktivt och med ett förändrat analytiskt tillvägagångssätt. I och med att mönster har kunnat urskiljas vad gäller arbetsuppgifter och handlingar samt vad som är viktig kunskap, kompetens och egenskaper i förhållande till den organisatoriska positionen ses dessa i kombination påverka rollen i olika riktningar. Alla positioner och nivåer ses innehålla drag av rollbeskrivningen analytiker. Ledningsnivån samt positionen finance ses också påverkas åt coach, positionerna RnD, logistik och produktion påverkar åt pedagog och positionen redovisning åt kamrer. Sist ses arbete på den operativa nivån påverka rollen åt såväl pedagog som kamrer. / Degree Project in Controlling, The Business Administration and Economics Programme. School of Business and Economics at Linnaeus university, Växjö. Course code 4FE18E, 30 credits. Spring semester 2019   Authors: Mikael Bergström and Louise Samuelsson Supervisor: Elin Funck   Title: The controller role - from generalization to nuance   Background: As the companies and their management accounting has developed, the controller role is said to have gone from that of a beancounter towards a business oriented business partner. However, there is a disagreement in how, and how far, the development has gone and arguments has been made that the complete transition has not materialized, and that the role can rather be seen as a hybrid. Despite the fact that the theoretical framework has opened up for a heterogenous role, the linear thinking in regards to the development of the role has led to generalisations and ambiguity in how the role is described.   Purpose: The purpose of this study is to identify different factors that affect the roles for controllers, as well as explaining how these factors affect controllers in various directions and towards various roles. The ambition along with the general purpose is therefore to generate a deeper knowledge and understanding as well as painting a more nuanced picture of controllers and their different roles in a company.   Method: The thesis is centered around a qualitative interview study of controllers as a professional group. Semi-structured interviews have been performed with controllers from three large manufacturing companies in order to provide a relevant depth and width for the empirical material.      Conclusions: A contribution is made to the theoretical framework, in part through the result of the thesis that conclude a hybridization of the role. The second contribution is that various factors that affect the role have been identified as well as discussed and utilized in order to distinguish different directions of the role pending on what level or in which position the controller is active. Expectations and opinions are seen to affect and open up for a broad and including role, while experience affect how controllers work as well as their analytical approach in different assignments. Patterns have emerged in regard to assignments, actions, important attributes and competencies that, combined with the organizational aspect, is seen to push the role in different directions. In accordance with this, all positions and levels include the role of analyst to some degree. Additionally, the managerial level as well as the position of finance show signs that point to a coach-role, the positions of RnD, logistics and production include an educator-perspective, and the position of accounting connect to the role of a chamberlain. Lastly, the operational level show signs of pushing the role towards that of both an educator and a chamberlain.
187

Rastrová analýza pro GIS nástroj ArcGIS / A Set of Raster Analysis Tools for ArcGIS

Hupšil, Radim January 2008 (has links)
This project is about studying geographic information system ArcGIS. It focuses on possibilities of extending ArcGIS by custom extensions and method of their programming. Furthermore some basic tools of raster analysis are ilustrated. This project's main objective is to design and implement custom implementation of ArcGIS extension, which provides a set of tools for raster analysis. Design is inspired by an existing extension - Spatial Analyst developed by ESRI.

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