This study examines whether corporate transparency about a restatement influences the Securities and Exchange Commission's (SEC) decision to issue an enforcement action. I consider corporate transparency to be higher when firms initiate an independent investigation into the restatement, display the restatement in a more prominent press release location, and/or report the restatement in a more visible SEC filing (i.e., Form 8-K). My sample of restatement observations spans nine years, 1997-2005, and is taken from the databases compiled by the General Accounting Office. For each restatement observation, I hand-collect information on SEC enforcement actions from the SEC's website and information on corporate transparency from company press releases and SEC filings. In order to determine the influence of corporate transparency, I develop a model predicting which restatement firms will be sanctioned by the SEC that includes measures of restatement severity, restatement characteristics, firm characteristics, and all three measures of corporate transparency. I find that, on average, greater restatement transparency increases the likelihood of an SEC sanction. This result is strongest before the Sarbanes-Oxley Act of 2002 (SOX), where all three proxies for corporate transparency are positive and significant predictors of SEC enforcement actions. After SOX, however, more visible SEC filings decrease the likelihood of an SEC sanction, suggesting that the SEC rewards this type of transparent behavior. In addition, the SEC also rewards corporate transparency by reducing monetary penalties when an enforcement action is issued. These results extend prior research (Bowen et al. 2005; Files et al. 2008; Gordon et al. 2008; Myers et al. 2008) by providing the first evidence on how corporate transparency affects the SEC's decision to issue an enforcement action. The results may be useful to managers of restating firms and academics researching SEC enforcement actions.

Quantum coherence and interference(QCI) effects have been studied for decades and are widely exploited in many areas. For media with QCI effect, the optical properties can change drastically, which leads to many interesting effects, such as coherent population trapping, electromagnetically induced transparency(EIT), lasing without population inversion(LWI) and so on. We have theoretically studied the pulsed regime of EIT. In particular, simulations of propagation of gaussian and 0 - pi co-propagating laser pulses in a medium consisting of 3-level Lambda-atoms have been performed. It has been found that, even at the two-photon resonance, the length of propagation for the 0 - pi pulses is much smaller than that for the Gaussian probe pulses. We explained such a behavior using the dark and bright basis and the dressed state basis. Some possible applications are discussed. We also investigated the collision-induced coherence of two decay channels along two optical transitions. Quantum interference will suppress the spontaneous emission. The degree of this suppression is measured by the branch ratio of these two transitions. Our preliminary calculations show that a significant decrease of the branching ratio with increase of electron densities is reproduced in the theory. We have developed a new variant of Raman spectroscopy with shaped femtosecond pulses. It has several advantages to be applied in multiscatterd media. It is based on change of the spectra of femtopulses due to Raman scattering (stimulated or coherent). The technique can be used for a broad range of applications from atomic and molecular optical and IR spectroscopy to spore detection and tissue microscopy. Finally, we have shown that Fano interference in the decay channels of three levels system can lead to considerably different absorption and emission profiles. We found that a coherence can be built up in the ground state doublet whose strength depends on a coupling parameter that arises from Fano interference. This can in principle lead to breaking of the detail balance between the absorption and emission processes in atomic systems.

In this work, interference and coherence phenomena, appearing in atomic and molecular ensembles interacting with coherent light sources, as electromagnetically induced transparency (EIT), coherent population trapping (CPT), and slow group velocity of light are investigated. The goal of the project is to make the steps towards various applications of these phenomena, first, by studying them in solid media (which are the most advantageous for applications), second, by suggesting some novel applications such as CPT-based plasma diagnostics, and realization of new types of solid-state lasers (based on suppression of excited-state absorption via EIT). The third goal of the project is extension of coherence and interference effects well-known in optics to the gamma-ray range of frequencies and, correspondingly, from atomic to nuclear transitions. A particular technique of chirped pulse compression applied to M??ossbauer transitions is considered and the possibility of compression of M??ossbauer radiation into ultrashort gamma-ray pulses is analyzed. The theoretical treatment of the interference and coherence effects is based on the semiclassical description of atom-light interaction, which is sufficient for correct analysis of the phenomena considered here. Coherent media are considered in two-, three-, and four-level approximations while their interaction with light is studied both analytically and numerically using the Maxwell-Bloch set of equations.

This dissertation consists of two essays on the execution cost of financial markets. In the first essay, we study impacts of new block trading rules on two kinds of large trades, block trades (BTs) and splitting order trades (STs). We find some results with policy implications. First, targets traded in the block trading market are illiquid. The proportion of BTs (STs) is the decreasing (increasing) function of stock liquidity. Second, large orders are mainly executed by STs except for illiquid stocks, but investors prefer to trade in block trading market at times when trade size is large, probability of informed trading is lower and price volatility is mild. Third, under the new system, the conditional execution costs of BTs (STs) decline (do not decline) and the percentage of BTs (STs) increases (decreases).Fourth, BTs are uninformed with motivations of tax minimization, general trades and ownership transfer trades, while STs are information based. BTs for tax minimization (general trades) incur the lowest (highest) execution costs. Uninformed BTs incur higher execution costs than informed STs, reflecting ¡§premiums of trading with the specific counterparty¡¨ of BTs. Finally, simulation analyses confirm that the block trading market functions well especially for illiquid stocks. In the second essay, we attempt to provide evidence regarding the welfare effect of pre-trade transparency affected by investor and order types. In order to understand the effect of transparency on welfare, we need to explore investors¡¦ behavior adjustments (aggressiveness and order size adjustments) reacted to transparency. We find both individual and institutional investors are more willing to supply liquidity after transparency enhancement. Individual investors behave more aggressively and submit larger order as they supply and demand liquidity, while institutional investors are relatively conservative and submit smaller order in an open environment. We measure welfare of investors in terms of implementation shortfall, which is weighted average of price impacts and opportunity costs. Our main result is, on average, institutional and individual investors who demand immediacy benefit from pre-trade transparency, especially for institutional investors, while traders who supply liquidity are worse off except institutional investors. Intraday analysis further notices individual investors providing liquidity near the end of day lose most from transparency enhancement, while institutional and individual investors demanding liquidity win most in close interval.

<p>Deferred shading är en renderingsteknik som har blivit allt mer populär i och med att hårdvaraukraven för tekniken inte längre är ett hinder. Ett problem med deferred shading är fortfarande hur transparenta objekt ska hanteras. Rapporten utvärderar två olika deferred pipelines som hanterar transparent geometri på olika sätt, de två renderingsmetoderna är <em>Inferred Lighting</em> samt <em>Light Pre Pass </em>med framåtrendering för hantering av transparent geometri.</p>

<p>In this thesis, the problem of controlling a surgical masterand slave system with force reflection is studied. The problemof stiff contacts between the slave and the environment isgiven specific attention. The work has been carried out at KTHbased on an initial cooperation with Karolinska Sjukhuset. Theaim of the over all project is to study the possibilities forintroduction of a force reflective teleoperator in neurologicalskullbase operations for the particular task of bone millingand thereby, hopefully, increase patient safety, decreasesurgeon workload and cost forthe society.</p><p>The main contributions of this thesis are:</p><p>Derivation of a dynamical model of the master andoperator’s finger system and, experimental identificationof ranges on model parameter values. Based on this model, theinteraction channel controllers optimized for transparency arederived and modified to avoid the influence of the uncertainmodel parameters. This results in a three channel structure. Todecrease the influence of the uncertain parameters locally atthe master, a control loop is designed such that the frequencyresponse of the reflected force is relatively unaffected by theuncertainties, a result also confirmed in a transparencyanalysis based on the H-matrix. The developed teleoperatorcontrol structure is tested in experiments where the operatorcould alter the contact force without facing any problems aslong as the slave is in contact with the environment.</p><p>As a result of the severe difficulties for the teleoperatorto move from free space motion to in-contact manipulationwithout oscillative behaviour, a new detection algorithm basedon passivity theory is developed. The algorithm is able todetect the non-passive behaviour of the actual teleoperatorinduced by the discrete change in system dynamics occurring atthe contact instant. A stabilization controller to be activatedby the detection algorithm is designed and implemented on themaster side of the teleoperator. The detection algorithm andthe stabilization controller are shown highly effective in realexperiments.</p><p>All major research results presented in the thesis have beenverified experimentally.</p><p><b>Keywords</b>Teleoperator, Force Feedback, Passivity, StiffContacts, Control, Robustness, Transparency, Bone Milling,Uncertainty</p>

<p>The Baltic Sea is the one of the most studied seas area in the world and it is severely affected by human activities where eutrophication is the overall environmental problem. Although there is an international agreement that nutrient input to the Baltic should be reduced, the measures taken so far have not resulted in major reductions in nutrient inputs nor in environmental improvements. Sewage reduction is the most important factor for transparency improvement of the Baltic Proper and wetland restoration and change of N spreading time have no effective role in this aspect. Within the Baltic area, establishment of sewage treatment technology in Russia and Poland is more cost-effective than it would be in Sweden. Without this measure transparency improvement would be expensive. In Sweden NOx reduction is most cost-effective measure for transparency improvement in the Baltic Proper and without this measure the total cost would be ~ 58.5 million euro.</p>

Thesis (Ph. D.)--University of California, San Diego, 2009. / Title from first page of PDF file (viewed October 13, 2009). Available via ProQuest Digital Dissertations. Vita. Includes bibliographical references (p. 375-400).

In the last few years alone, calls for transparency by consumers have grown louder. No longer are consumers willing to sit back and allow firms to make `closed door' decisions that benefit the company (and its executives) at the expense of consumers and society. This dissertation begins to answer the call for a greater understanding of transparency from both practitioner and academic perspectives. In particular, this dissertation focuses on systematically developing a succinct definition of perceived firm transparency, developing a valid measure of transparency, and empirically testing antecedents and consequences of transparency. Two studies were conducted to develop the transparency scale following a thorough review of the transparency literature across six fields. Study 1 was dedicated to scale development and validation for the transparency construct. Study 2 was dedicated to further validating the transparency scale and testing its psychometric properties and validity. The complete proposed model was tested in Study 3 utilizing scenarios in a between-subjects design with a student sample. Study 4 further tested the proposed model in a slightly more ecologically valid setting with a more diverse sample. Studies 3 and 4 showed that transparency has significant direct impact on reducing skepticism, and increasing trust, attitude toward the firm, and purchase intention; and these impacts are of substantial magnitude. Studies 3 and 4 also tested a few antecedents of perceived firm transparency including perceived firm reciprocity, perceived consumer effort, and negative information. Reciprocity and consumer effort both had a significant impact on perceptions of firm transparency in Studies 3 and 4, and negative information impacted perceptions of transparency in Study 3 only. At its core, transparency means that a firm is perceived to be open and forthright with stakeholders. This dissertation shows that stakeholders reward firms for being transparent; and those rewards come in the form of decreased skepticism and increased favorable attitudes toward the firm, trust, and purchase intention. Managers can focus on increasing perceptions of transparency by providing stakeholders with opportunities for mutual conversations, by making easy for stakeholders to learn about the company and its offerings, and by sharing more balanced information about itself that reflects both the positives and the negatives.

In the last two decades, corruption has become a key concern throughout the world. Most of what we know about corruption comes from instances in which misdeeds become public, usually generating a scandal. Why do some acts of corruption become corruption scandals and others do not? This dissertation argues that scandals are not triggered by corruption per se, but are initially caused by the dynamics of political competition within the government. Government insiders leak information on misdeeds in order to increase their influence within the coalition/party in power. A powerful opposition, contrary to common beliefs, acts as a constraint for insiders, making corruption scandals less likely. In order to advance this central argument, this dissertation divides the temporal development of corruption scandals into four stages and proposes a formal model that analyzes the interactions of government insiders and the political opposition. The arguments and hypotheses generated are then evaluated using empirical evidence from two paradigmatic Latin American cases, Argentina and Chile, from 1989 to 2010. The findings support the notion that corruption scandals emerge as a consequence of political competition. / text