In this dissertation, we consider timeliness and energy optimization in battery-powered, mobile embedded real-time systems. We focus on real-time systems that operate in environments with dynamically uncertain properties, including context-dependent activity execution times and arbitrary activity arrival patterns. We consider an application model where activities are subject to time/utility function (or TUF) time constraints, mutual exclusion constraints on concurrent sharing of non-CPU resources, timeliness requirements including assurances on individual activity timeliness behavior, and system-level energy consumption requirements including a non-exhaustable energy budget. To account for uncertainties in activity properties in dynamic systems, we stochastically describe activity execution demands, and describe activity arrival behaviors using the unimodal arbitrary arrival model, which allows unbounded arrival frequencies. We consider the scheduling optimality criteria of: (1) probabilistically satisfying lower bounds on individual activities' maximal timeliness utilities, and (2) maximizing system-level energy efficiency, while ensuring that the system's energy consumption never exhausts the energy budget and resource mutual exclusion constraints are satisfied. For this multi-criteria scheduling problem, we present a DVS (dynamic voltage scaling)-based, real-time scheduling algorithm called the Energy-Bounded Utility Accrual Algorithm (or EBUA). Since the scheduling problem is NP-hard, EBUA heuristically (and dynamically) allocates CPU cycles to activities, computes activity schedules, and scales CPU voltage and frequency with a polynomial-time cost. If activities' cumulative execution demands exceed the available CPU time or may exhaust the system's energy budget, the algorithm defers and rejects jobs in a controlled fashion, minimizing system-level energy consumption and maximizing total accrued utility. We analytically establish several properties of EBUA. We prove that the algorithm never exhausts the specified energy budget. Further, we establish EBUA's timeliness optimality during under-loads, freedom from deadlocks, and correctness in mutually exclusive resource sharing. In particular, we prove that the algorithm's timeliness behavior subsumes the optimal timeliness behavior of deadline scheduling as a special case, and identify the conditions under which lower bounds on individual activity utilities are satisfied. In addition, we upper bound the time needed for mutually exclusively accessing shared resources under EBUA. We conduct experimental studies by simulating the algorithm on the DVS-enabled AMD k6 processor model, and by implementing it on QNX Neutrino 6.2.1 RTOS. Our experimental results validate our analytical results. Further, they confirm EBUA's superiority over other energy-efficient real-time scheduling algorithms on timeliness and energy consumption behaviors. / Ph. D.

Fair value accounting of biological assets in the public sector was introduced with the adoption of the public sector specific accounting standard, Generally Recognised Accounting Practice (GRAP) 101. The public sector currently uses different bases of accounting: public entities and municipalities must use accrual accounting and apply the principles of GRAP, while government departments report on the modified cash basis. Furthermore, public entities do not consistently apply the requirements of GRAP 101. This lack of a uniform basis of accounting has a negative effect on the comparability of financial information. This study identified the challenges facing the public sector in the application of GRAP 101, specifically regarding the fair value accounting of biological assets. The successful implementation of GRAP 101 by a public entity, AsgiSA-EC, was used as a case study to clarify the fair value accounting challenges in the reporting of biological assets in the sector. / Business Management / M. Accounting Science

Fair value accounting of biological assets in the public sector was introduced with the adoption of the public sector specific accounting standard, Generally Recognised Accounting Practice (GRAP) 101. The public sector currently uses different bases of accounting: public entities and municipalities must use accrual accounting and apply the principles of GRAP, while government departments report on the modified cash basis. Furthermore, public entities do not consistently apply the requirements of GRAP 101. This lack of a uniform basis of accounting has a negative effect on the comparability of financial information. This study identified the challenges facing the public sector in the application of GRAP 101, specifically regarding the fair value accounting of biological assets. The successful implementation of GRAP 101 by a public entity, AsgiSA-EC, was used as a case study to clarify the fair value accounting challenges in the reporting of biological assets in the sector. / Business Management / M. Accounting Science

美國在2001年10月爆發了安達信(Anderson)-安隆（Enron）案，對整個企業界造成極大的衝擊，提供非審計服務究竟是否會影響財務報表品質引起廣泛討論。 因證期會於民國九十二年一月三十日新修正「證券發行人財務報告編製準則」第二十二條，使得資訊相對過往較易取得，雖因研究限制使得樣本不具良好代表性，但在某種程度上仍能提供一定的參考價值，故本研究擬仿效Frankel et al. (2002)之研究，探討在台灣會計師提供非審計服務及審計服務是否會對財務報表品質造成影響；本研究以Threshold（公司實際每股盈餘-分析師預測每股盈餘）及裁量性應計(discretionary accrual)做為財務報表品質之代理變數。 本研究發現上市公司並未因審計公費及非審計公費較高而有進行盈餘管理，但上櫃公司卻會因審計公費及非審計公費較高而進行盈餘管理。 / The collapse of Enron and the conflict of interest surrounding their auditors Arthur Anderson, particularly the effect non-audit fees on the quality of the audited financial statements, have resulted in numerous changes to the regulations effectively limiting the level of non-audit service accounting firms can offer to their clients. The Taiwan SEC enacted new regulations forcing public companies that meet certain criteria, to disclose the level of audit and non-audit fees paid to accounting firms. This resulted in the availability of information that was previously unobtainable. However, concerns still remain, as research is restricted because the number of companies reporting represents a small percentage of the companies in Taiwan. Nonetheless, this research hopes to use the data from the reporting companies to examine the relationship between the quality of the financial statement and the level of fees paid to accounting firms. We intent to use an adaptation of the Frankel et al. (2002) model to study the companies in Taiwan. Using data provided by the companies we intend to demonstrate a causal relationship between the level of non-audit fees and the quality of the accounting statement. We used Threshold and discretionary accrual to represent the quality of the financial statement. We found that for the companies listed on the TAIEX there was no relationship between the quality of the financial statements and the level of audit and non-audit fees; however for companies trading on the OTC market we found there was a causal relationship.

由於會計資訊與企業存有緊密之關聯性，再加上企業外部的報表使用者屬於相對資訊弱勢者，企業之管理當局因此存有許多不同動機及機會進行盈餘管理。會計師受託查核公司財務報表並對報表表示意見，在健全資本市場的任務中擔任極為重要的角色，社會大眾對會計師之職責賦予相當大的期待。但繼美國安隆案後，各國財務報導相關弊案連續爆發卻使會計師的專業遭受嚴重質疑，因此，弊案爆發或會計師受主管機關懲處後，先前被懲處會計師所簽證之其他受查公司，不論有無類似弊病，都會被人以放大鏡來觀察。然而，究竟會計師對於實質盈餘管理之抑制效果是否得以發揮？會計師懲戒制度實施結果是否合乎立法初衷而得以督促提升報表之盈餘品質？則尚無一致結論，亦為本研究欲探討的議題。 / Grahem et al.（2005），Roychowdhury（2006）及Cohen et al.（2008）等文獻均認為沙氏法頒布後，公司管理階層用以操縱盈餘之行為，從過去進行應計項目盈餘管理，改為偵察度較困難、法律上可非難性較低之實質盈餘管理。本研究即參考Roychowdhury之研究，以異常裁決性費用、異常生產成本、異常營運活動現金流量之絕對值捕捉實質盈餘管理程度，依據欲探討之問題設定兩大研究假說，以獨立樣本觀察懲戒會計師事件發生前後期實質盈餘管理之變化，探討懲戒會計師制度對於實質盈餘管理之影響。研究結果發現，以異常裁決性費用與異常生產成本衡量實質盈餘管理之程度時，受懲戒會計師之客戶在經查核後之財務報表中，報導實質盈餘管理之程度更為嚴重；以異常營運活動現金流量為實質盈餘管理之代理變數，則因受干擾影響而無法在各假說下得出顯著之結果。 / 因會計師之查核關卡對於實質盈餘管理之抑制效果有限，目前企業報表中所報導數據之解讀，有賴報表使用者多予比較各科目前、後期波動，考量各數值之間之關連性，並推敲公司可能使用之盈餘管理行為以及相關企業風險。懲戒制度之目的在於避免專業人士怠忽其職、違規行事而侵害大眾利益，其不僅處分已違法之會計師，對於其他會計師亦有警惕之意味，因此實有其存在之必要，本研究結果建議主管機關參考相關研究，制訂更為完善的制度以增進大眾利益，符合社會期待。 / Since accounting information is instrumental to many decisions that a company and its stakeholders make, management has plenty of motives to manage earnings reported on the financial statements. The users will probably as a result misinterpret the data, and thus, sustain direct or indirect losses. Accountants are asked to express their opinions toward the financial reports, and have played an important role in the capital market. Investors rely on what accountants assure in their audit to make decisions. However, after the Enron scandal broke out, so many frauds erupted that accountants’ professionalism and assurance quality were being questioned. Sanctions may be due to the profession’s self-regulation system or based on judgment of the regulators. Nevertheless, does the CPA sanction system actually restrain the real earnings management behavior of auditee companies? Can the system really enhance the earnings quality of client accounting information? The answers to these questions are unknown, and they are the subject of this study. / Managers have altered their application to manage earnings from accruals to real activities since the issuance of Sarbanes-Oxley Act. Based upon the research model developed by Roychowdhury (2006), this study uses abnormal discretionary expenses, abnormal production, and abnormal operating cash flow as proxies for earnings management. I classify samples into two periods, i.e., before and after changing accountants to analyze whether the sanction has affected the application of real earnings management. The results do not support that the auditor sanction system in Taiwan is effective in reducing the real earnings management behavior of auditee firms. / In short, one purpose of CPA sanction is to enforce professional conduct on all members of the profession. It not only punishes the accountants that break laws, but also alerts other fellow auditors. Therefore, the sanction system is necessary. The regulators should refer to research findings and examine the effect of the sanction system on real earnings management. In the mean time, it is advisable that statements users put more emphasis on analyzing and comparing the fluctuations of the figures and ratios between periods. After all, reading carefully through financial statements and numbers is the ultimate way to stop real earnings management.

Made available in DSpace on 2016-04-25T18:39:47Z (GMT). No. of bitstreams: 1 Armando Cesar Oka.pdf: 906064 bytes, checksum: be230dec20e823ef7d6c3f6d173ade7b (MD5) Previous issue date: 2012-06-11 / This study, entitled Cash Flow Management by the Double Entry Bookkeeping System and Accrual Basis Accounting and conducted by Armando César Oka, aims at filling the existing gap on Cash Flow exposing the issue of its construction by applying the Double Entry Bookkeeping System and Accrual Basis Accounting under the hypothesis of a single electronic database for building Cash Flow, Balance Sheet and Income Statement for the year. It shows the accountants the Cash Flow as an object of study due to the importance given to this instrument by public and private entities as well as rescuing liquidity of the leading for profit accounting. Carrying on the academic work and the exploratory researches conducted by the researcher of this study, it exposes the reason for the application of the Double Entry Bookkeeping System and Accrual Basis Accounting to the Cash Flow and for its experiment in a legal entity, getting result by using the Cash Flow Statement. The experiment led the researcher to look for clarification, in the existing literature, regarding the results obtained in the Cash Flow Statement. It also led him to make a structural comparison to the Balance Sheet and Income Statement for the year due to the application of the Double Entry Bookkeeping System and Accrual Basis Accounting in the last two instruments. The conclusion of this study is that it is possible to apply the Double Entry Bookkeeping System and Accrual Basis Accounting in Cash Flow by getting an evidence with liquidity characteristics / Este estudo, efetuado por Armando César Oka, intitulado Fluxo de Caixa Gerencial pelo Método das Partidas Dobradas e Regime de Competência , tem como objetivo a pretensão de preencher a lacuna existente sobre o Fluxo de Caixa, expondo a questão de sua construção mediante a aplicação do Método das Partidas Dobradas e Regime de Competência, sob a hipótese de utilização de um só banco de dados eletrônico para a construção do Fluxo de Caixa, do Balanço Patrimonial e da Demonstração de Resultado do Exercício (DRE). Vem mostrar aos contadores o Fluxo de Caixa como objeto de estudo em virtude da importância dada para este instrumental pelas entidades públicas e privadas, resgatando a liquidez da preponderante contabilidade voltada ao lucro. Em continuidade ao trabalho de formação acadêmica e pesquisas exploratórias efetuadas por este pesquisador, expõe a razão da aplicação do Método das Partidas Dobradas e Regime de Competência ao Fluxo de Caixa e de seu experimento em uma entidade jurídica, obtendo o resultado mediante a Demonstração de Fluxo de Caixa. O experimento levou este pesquisador a buscar na literatura existente esclarecimentos dos resultados obtidos na Demonstração de Fluxo de Caixa e uma comparação estrutural ao Balanço Patrimonial e Demonstração do Resultado do Exercício em virtude da aplicação, nestes dois últimos instrumentais, do Método das Partidas Dobradas e Regime de Competência. A conclusão alcançada é que é possível aplicar o Método das Partidas Dobradas e Regime de Competência no Fluxo de Caixa, obtendo-se uma evidenciação com características voltadas à liquidez

Conceitos e técnicas são ensinados em ambientes educacionais e deveriam ser aprendidos; porém, os exames nacionais de larga escala têm mostrado resultados indesejados, evidenciando uma lacuna na aprendizagem dos nossos alunos. Segundo Sanchez (2013), nos cursos de graduação em Ciências Contábeis, os principais erros conceituais cometidos pelos estudantes são: uso equivocado dos conceitos de caixa e competência e erros matemáticos. A definição de erro conceitual é referida na literatura sobre misconceptions (Chi, 1992) em que existe uma apresentação padrão na forma em que o erro desponta e um relacionamento incompatível entre os conceitos novos, a serem aprendidos pelos alunos, e os conceitos prévios, já existentes. Os erros conceituais têm seis características: são robustos, consistentes, persistentes, homogêneos, recapitulados e sistemáticos. Por isso, são difíceis de serem corrigidos. Chi et al (1994) utilizam da teoria da estruturação do conhecimento, em que definem que os conceitos são classificados em categorias ao serem aprendidos. Porém, conceitos que são classificados erroneamente transformam-se em erros conceituais robustos: são difíceis de serem aprendidos, pela dificuldade em transpor o conceito para a categoria adequada. Com base na definição de misconception e da estruturação dos conceitos em categorias, buscou-se entender como os estudantes formam os erros conceituais e, com base nestes tipos de erro encontrados e nas seis características dos padrões de erros, coletamos evidências da formação e superação dos erros por parte dos alunos. Estas evidências nos auxiliaram na criação de uma estratégia de ensino, construída com base na estruturação do conhecimento e, que seja diferente da estratégia \"comum\" de aula de Contabilidade Introdutória, que é o primeiro contato dos estudantes da área de negócios com contabilidade, com intuito de responder a nossa questão de pesquisa: \"Qual o impacto (proporção e sentido) da adoção desta estratégia de ensino baseada em erros conceituais no aprendizado dos estudantes?\" O impacto da estratégia foi motivacional, pois fez os alunos refletirem sobre os erros conceituais, mas insuficiente para aumentar a proporção de acertos nas avaliações realizadas. / Concepts and techniques are taught in educational settings and should be learned; however, large-scale national exams have shown undesirable results, evidencing a learning gap in our students. According to Sanchez (2013), in the undergraduate courses in Accounting, the main misconception made by students are: misuse of concepts of cash and accrual and mathematical errors. The definition of misconception is referred to in the literature (Chi, 1992) in which there is a standard presentation in the form in which the error emerges and an incompatible relationship between the new concepts to be learned by the students and the prior knowledge already existing. Misconception have six characteristics: they are robust, consistent, persistent, homogeneous, recapitulated and systematic. Therefore, they are difficult to correct. Chi et al. (1994) use the theory of knowledge structuring, where they define that concepts are classified into categories when they are learned. However, concepts that are misclassified become robust conceptual errors: they are difficult to learn because of the difficulty in transposing the concept into the appropriate category. Based on the definition of misconception and the structuring of concepts into categories, we sought to understand how students form misconception and, based on these types of errors found and on the six characteristics, we collect evidence of the formation and overcoming of errors on the part of the students. These evidences helped us in creating a teaching strategy, based on the structuring of knowledge and that is different from the \"common\" strategy of First Accounting Class, which is the first contact of the students of the business area with accounting, with In order to answer our research question: \"What is the impact (proportion and signal) of adopting this teaching strategy based on conceptual errors in learning?\" The impact of the strategy was motivational, as it made the students reflect on the conceptual errors, but insufficient to increase the proportion of correctness in the realized evaluations.

會計盈餘的產生係根據應計基礎，應計會計程序預期會緩和時間性及配合性的問題，而繼美國財務會計準則公報第九十五號公布二年後，國內於民國七十八年十二月發布財務會計準則公報第十七號『現金流量表』，故本研究探討盈餘與現金流量究竟何者較能解釋股票報酬，應計會計程序所扮演的角色為何？本研究首先分析不同累計期間下盈餘與現金流量和股票報酬的關聯性，以及，在不同運用資金的變異性及營業循環期間下，盈餘與現金流量對股票報酬的解釋力，俾瞭解盈餘與現金流量基本財務資料，在投資人決策制定過程中所扮演的角色，以及何者為解釋股票報酬的良好指標。 　　本研究係由探討國內外相關文獻，並參酌國內環境，加以延伸，蒐集民國七十五年至八十二年的資料，以Pooling方法分析，比較盈餘與現金流量和股票報酬的關聯性，進一步使用Vuong Z-statistic從事測試工作。 　　經由實證結果，本研究獲致如下的結論： 　　1、在短的報導期間下，盈餘和股票報酬的關聯性並未較現金流量強，而淨現金流量對股票報酬的解釋力隨著期間的增加而增加。 　　2、在不同的報導期間下，當公司有重大應計數時，盈餘對股票報酬的解釋力並未較現金流量佳。 　　3、當公司及產業的營業循環期間愈長，非現金流量的運用資金變異性愈大，達顯著水準，惟其並不影響盈餘與現金流量對股票報酬的解釋力。

Problembakgrund: Finansiella rapporter är ett sätt för företagen att kommunicera med investerare och intressenter. Samtidigt som det finns lagar och förordningar som styr redovisning och rapporterns utseende finns det goda möjligheter för företagsledningen att påverka de siffror som presenteras i de publika rapporterna genom periodiseringar. Denna studie tar konceptet kring att investera baserat på graden av periodiseringar till den svenska aktiemarknaden. Problemformulering: Är det möjligt att generera riskjusterad överavkastning på den svenska aktiemarknaden med periodiseringsbaserade investeringsstrategier? Syfte: Huvudsyftet med studien är att undersöka investerares möjlighet till riskjusterad överavkastning på den svenska aktiemarknaden utifrån investeringsstrategier baserade på graden av periodiseringar. Ett delsyfte är att jämföra två delperioder för att undersöka om periodiseringsanomalins förekomst förändrats över den totala undersökningsperioden. Ett annat delsyfte är att undersöka om den svenska aktiemarknaden effektivt värderar offentlig redovisningsinformation. Teori: Studien baseras huvudsakligen på tidigare periodiseringsbaserad forskning utförd på den amerikanska aktiemarknaden där Sloan (1996) anses vara den som introducerade teorin kring periodiseringsanomalier så som den ter sig idag. Metod: En kvantitativ studie med en deduktiv ansats. Den empiriska undersökningen baseras på redovisnings- och aktiedata under tidsperioden 1996-12-31 till 2013-06-30 som kommer från Thomson Reuters Datastream och Worldscope. Empiri & analys: Resultatet av studien tyder på att det finns en negativ korrelation mellan periodiseringar och avkastning samt visar stöd för att periodiseringsanomalin existerar på den svenska aktiemarknaden. Av de periodiseringsmått som testats visade det sig att ΔNOA och ΔWC gav högst överavkastning. Slutsats: Studien indikerar att felprissättningar förekommer och att periodiseringsanomalin existerar på den svenska aktiemarknaden. Den höga exponeringen mot riskfyllda småbolag innebär att vinstmöjligheterna minskar något på grund av höga implementeringskostnader samtidigt som det gör strategierna mindre attraktiva för institutionella investerare. Det är därför upp till privata investerare att utnyttja dessa felprissättningar.

Denna studie behandlar förekomsten av resultatstyrning i svenska kommuner. Tidigare forskning visar på att styrning främst tar form av periodiseringar samt att de främsta förklarande faktorerna för förekomsten är ekonomi, politik och tjänstemän. Existerande teori menar på att övergången från kassabaserad redovisning till bokföringsmässiga grunder underlättade resultatstyrning och att det förekommer både i kommuner och företag i Sverige.Undersökningen syftar till att förklara förekomsten av resultatstyrning i kommuner med hjälp av posten “bidrag till statlig infrastruktur”. I analysen ifrågasätts användandet av resultatstyrning, vilka incitament som finns samt hur dess incitament påverkar beslutprocessen.Studien är en dokumentstudie och har genomförts som en kvantitativ analys. Det empiriska materialet har främst samlats in från kommuners årsredovisningar. Flera statistiska analyser genomförs och leder fram till studiens resultat. Resultaten visar på att resultatstyrning förekommer i kommuner och att det främst är kortsiktiga incitament som styr besluten. Tiden som kommuner väljer att periodisera bidragen på beror främst på hur stora beloppen på bidragen som lämnas är samt om kommunen har mottagit stora engångsbelopp i form av till exempel AFA-försäkringar, AFA-premier eller konjunkturstöd från staten de åren eller inte. / This thesis is an analysis of the occurrence of earnings management in Swedish municipalities. Previous theory claims that the change from cash accounting to accrual accounting has made it easier to involve in earnings management actions and that these actions are broadly used in both municipalities and corporate companies. Similar studies proves economy, politics and civil servants to be explanatory for why earnings management takes place in municipalities.We seek to explain this occurrence by using the accounting record contribution to national infrastructure. The aim is to answer what the main incentives are for manipulating the results in municipalities and how these incentives affect the decision making progress.This is mainly a documentary study that focuses on the public financial reports of municipalities. A statistical analysis is performed and conclusions are drawn. We find evidence that earnings management exist in municipalities and that the biggest explaining factor of how the contribution is accounted for depend on the size of the contribution to infrastructure and if the municipality has received any big amounts from the government in form of AFA-insurances, AFA-premier or cyclical support that year or not. This indicates a short-term thinking with high focus on net income. This study is hereafter written in Swedish.