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Search Results: 1 - 10 of 2650 matches for " Sophie Greenberg "
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Endoscopic Adenoidectomy Secondary to Druginduced Trismus  [PDF]
Mark Greenberg, Daniela Carvalho
Surgical Science (SS) , 2010, DOI: 10.4236/ss.2010.11006
Abstract: We present the case of a 4 year old girl whose adenoidectomy had to be performed via an endoscopictrans oral approach due to the unexpected inability to fully open the mouth during the procedure. The patient had previously been taking Risperidone for behavioral symptoms associated with her autism. The jaw tone returned to normal following the procedure and there were no complications. An interaction between the Risperidone and the anesthetics were the likely cause of the trismus.
Hedging with Stock Index Options: A Mean-Extended Gini Approach  [PDF]
Haim Shalit, Doron Greenberg
Journal of Mathematical Finance (JMF) , 2013, DOI: 10.4236/jmf.2013.31011

One of the more efficient methods to hedge portfolios of securities whose put options are not traded is to use stock index options. We use the mean-extended Gini (MEG) model to derive the optimal hedge ratios for stock index options. We calculate the MEG ratios for some main stocks traded on the Tel Aviv Stock Exchange and compare them to the minimum-variance hedge ratios. Computed for specific values of risk aversion, MEG hedge ratios combine systematic risk with basis risk. Our results show that increasing the risk aversion used in the computation reduces the size of the hedge ratio, implying that less put options are needed to hedge away each and every security.

Can Financial Education Extend the Border of Bounded Rationality?  [PDF]
Doron Greenberg, Ze’ev Shtudiner
Modern Economy (ME) , 2016, DOI: 10.4236/me.2016.72012
Abstract: When choosing a particular alternative from a number of financial assets, risk is an important feature. According to the classic Capital Assets Pricing Model (CAPM), we would expect to receive a positive correlation between risk and return of financial assets. However, studies show that investors judge financial assets in terms of “good” or “bad”. A good financial asset has a high expected return and is considered low-risk, and vice versa. This type of thinking is biased, as it is both irrational and contradicts the classical theory of finance. One explanation for this bias is the affect heuristic. According to this heuristic, the investor forms her attitude about the asset in the first stage, and then links all of her subsequent judgments to this attitude. The aim of this study is to examine how this bias is affected by studying the CAPM in Finance entry courses. An experiment was conducted in which each subject made both risk judgments and return judgments in regard to 25 domestic stocks chosen randomly from the Tel Aviv 100 stock index. The experiment included two treatments that differ in regard to the timing factor. Some of the subjects were asked to judge the return and risk ratings before learning about the CAPM in class; the others were asked after studying the CAPM material. Finance education reduced the bias, but did not prevent it. The results show that in the teaching of Economics, there should be a balance between providing a coherent theoretical framework together with behavioral aspects. Moreover, given that finance education did not prevent the bias among students with background in quantitative analysis, it is reasonable to assume that other agents without this background would have more difficulties to apply the principles of investments under uncertainty.
An Exploratory Study of Altruism in Greek Children: Relations with Empathy, Resilience and Classroom Climate  [PDF]
Sophie Leontopoulou
Psychology (PSYCH) , 2010, DOI: 10.4236/psych.2010.15047
Abstract: The aims of this exploratory study were two-fold: a. to identify any relations between children’s altruism and a set of demographic and other personal and social characteristics of Greek children, such as empathy, resilience and classroom climate; and b. to examine the psychometric properties of a newly-developed measure of altruistic behaviour in children, namely the Altruistic Behaviour Questionnaire (ABQ). 232 male and female students of the 5th and 6th class of Primary School in Northern Greece participated in this study. The ABQ was found to have adequate internal consistency and concurrent and construct validity. Using a hierarchical regression analysis, altruism in children was found to be reliably predicted by participants’ gender and academic performance, by empathy and also by resilience; nevertheless, the more socially determined variable of classroom climate only marginally predicted altruism. The importance of including training in the development and manifestation of altruism in emotional education programmes and resilience interventions at school is highlighted.
Endovascular Thrombectomy Following Acute Ischemic Stroke: A Single-Center Case Series and Critical Review of the Literature
Eric Sussman,Christopher Kellner,Michael McDowell,Peter Yang,Eric Nelson,Sophie Greenberg,Daniel Sahlein,Sean Lavine,Philip Meyers,E. Sander Connolly
Brain Sciences , 2013, DOI: 10.3390/brainsci3020521
Abstract: Acute ischemic stroke (AIS) due to thrombo-embolic occlusion in the cerebral vasculature is a major cause of morbidity and mortality in the United States and throughout the world. Although the prognosis is poor for many patients with AIS, a variety of strategies and devices are now available for achieving recanalization in patients with this disease. Here, we review the treatment options for cerebrovascular thromboembolic occlusion with a focus on the evolution of strategies and devices that are utilized for achieving endovascular clot extraction. In order to demonstrate the progression of this treatment strategy over the past decade, we will also present a single-center case series of AIS patients treated with endovascular thrombectomy.
Conversations with Oedipus
Greenberg, Jay;
Trends in Psychiatry and Psychotherapy , 2012, DOI: 10.1590/S2237-60892012000200003
Abstract: as psychoanalysts engage with our patients in exploring their lives, we learn a great deal about the ways in which they express their own agency, and also about ways in which they respond to being the object of other people. but because of the particular history of psychoanalytic theorizing, we are more familiar with interpreting the patient's activity - the drives and wishes - than we are with dealing with the inevitable reversals between activity and passivity that characterize every life. this problem is explored by drawing parallels between clinical material and sophocles' tragic rendering of the life of oedipus the king.
Genetic testing and related ethical issues
J Greenberg
Continuing Medical Education , 2005,
Iwasawa theory for elliptic curves
Ralph Greenberg
Mathematics , 1998,
Abstract: We study this subject by first proving that the p-primary subgroup of the classical Selmer group for an elliptic curve with good, ordinary reduction at a prime p has a very simple and elegant description which involves just the Galois module of p-power torsion points. We then prove theorems of Mazur, Schneider, and Perrin-Riou on the basis of this description. The final section, which is half of this long paper, contains a number of results and examples including a thorough study of the mu-invariant.
Space-Efficient Manifest Contracts
Michael Greenberg
Computer Science , 2014,
Abstract: The standard algorithm for higher-order contract checking can lead to unbounded space consumption and can destroy tail recursion, altering a program's asymptotic space complexity. While space efficiency for gradual types---contracts mediating untyped and typed code---is well studied, sound space efficiency for manifest contracts---contracts that check stronger properties than simple types, e.g., "is a natural" instead of "is an integer"---remains an open problem. We show how to achieve sound space efficiency for manifest contracts with strong predicate contracts. The essential trick is breaking the contract checking down into coercions: structured, blame-annotated lists of checks. By carefully preventing duplicate coercions from appearing, we can restore space efficiency while keeping the same observable behavior. Along the way, we define a framework for space efficiency, traversing the design space with three different space-efficient manifest calculi. We examine the diverse correctness criteria for contract semantics; we conclude with a coercion-based language whose contracts enjoy (galactically) bounded, sound space consumption---they are observationally equivalent to the standard, space-inefficient semantics.
Application of Ostrich Antibodies to the Restoration of Hair Growth, a Preliminary and Case Report  [PDF]
Yasuhiro Tsukamoto, Barry Hendler, Stuart Greenberg
Journal of Cosmetics, Dermatological Sciences and Applications (JCDSA) , 2018, DOI: 10.4236/jcdsa.2018.84019
Abstract: The hormone dihydrotestosterone (DHT) and the catalyst 5α-reductase play very important roles in the hair loss due to androgenetic alopecia (AGA). Recently, some chemicals against these hormones have been commercialized as therapeutics for AGA. In the present study, we have attempted to find out the potential effects of antibodies on AGA therapeutics as an inhibitor of androgenic hormones. The immune system of the ostrich is believed to be the most versatile and powerful of any animal on the planet, and antibodies derived from the ostrich egg yolk are now being developed for a wide range of diseases and ailments. Ostrich antibodies against DHT and 5α-reductase have been produced and combined with antibodies against harmful skin bacteria to restore normal hair growth in AGA cases. Preliminary testing with six volunteer subjects showed that ostrich antibodies were clearly quite effective in hair regrowth.
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