1,782 research outputs found

    Pricing of Idiosyncratic Risk in an Intermediary Asset Pricing Model

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    Standard asset pricing theories suggest that only systematic risk is priced. Empirical studies report a relationship between idiosyncratic volatility or risk (IVOL) and asset price. The most common explanation for this anomaly is that households under-diversify creating a Bad Model problem. This paper uses an Intermediary Asset Pricing Model (IAPM) as a way to control for under-diversification in evaluating the relationship between IVOL and asset price. We find that IVOL premia is lower in an IAPM. Our findings indicate that under-diversification can explain the anomaly partially

    How High-Tech Industries Can Reduce Uncertainty on Technological and Market Risk

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    This study assesses the external cooperation, market intelligence, and innovation competencies of Finnish high-tech companies that reduces technology and market risks. It will also explore how these companies, especially Nokia Corporation, manage general uncertainty along with market risks. The objective of this research is to evaluate uncertainty reduction in relation to strategic practices alongside examining high-tech strategies in Finland. The research was carried out using a descriptive design and both qualitative and secondary sources: academic journals, industry reports, and primary data from a survey. The survey was comprised of 5-point Likert questions aimed at 55 professionals working in R&D, innovation management, and strategic planning within the Finnish high-tech sector. The study found that that while strategic planning and innovation capability clearly helped to enhance organizational adaptability, market intelligence greatly enabled the reduction of uncertainty. Uncertainty reduction was demonstrated through proactive mitigation of technological market risks. The flexibility and external collaboration were found to be less effective in strengthening organizational adaptability. The discussion has led to the conclusion that innovation, strategic foresight, and market intelligence are essentially or critically needed tools in managing uncertainties and risks within the high-tech industry. The above insights, together with the recommendations given, are intended to boost these firms' sustained global competitiveness and sustainability levels, thus enriching academic and practical knowledge regarding uncertainty reduction strategies

    Maternal and neonatal complications following Kielland's rotational forceps delivery: A systematic review and meta‐analysis

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    Background There is conflicting evidence regarding the safety of Kielland's rotational forceps delivery (KRFD) in comparison with other modes of delivery for the management of persistent fetal malposition in the second stage of labour. Objectives To derive estimates of risks of maternal and neonatal complications following KRFD, compared with rotational ventouse delivery (RVD), non-rotational forceps delivery (NRFD) or a second-stage caesarean section (CS), from a systematic review and meta-analysis of the literature. Search Strategy Standard search methodology, as recommended by the Cochrane Handbook for Systematic Reviews of Interventions. Selection Criteria Case series, prospective or retrospective cohort studies and population-based studies. Data Collection and Analysis A meta-analysis using a random-effects model was used to derive weighted pooled estimates of maternal and neonatal complications. Main Results Thirteen studies were included. For postpartum haemorrhage there was no significant difference between Kielland's and ventouse delivery; the rate was lower in Kielland's delivery compared with non-rotational forceps (RR 0.79, 95% CI 0.65–0.95) and second-stage CS (RR 0.45, 95% CI 0.36–0.58). There were no differences in the rates of anal sphincter injuries or admission to neonatal intensive care. Rates of shoulder dystocia were higher with Kielland's delivery compared with ventouse delivery (RR 1.79, 95% CI 1.08–2.98), but rates of neonatal birth trauma were lower (RR 0.49, 95% CI 0.26–0.91). There were no differences seen in the rates of 5-min APGAR score < 7 between Kielland's delivery and other instrumental births, but they were lower when compared with second-stage CS (RR 0.47, 95% CI 0.23–0.97). Conclusions Kielland's rotational forceps delivery is a safe option for the management of fetal malposition in the second stage of labour

    Measurement of the top quark pair production cross section with a tau lepton in the final state at the center of mass energy of 8 TeV

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    This dissertation presents the measurement of the inclusive cross section of the top quark pair production in the final state of a tau lepton with associated jets. The dataset used in this measurement is collected by the ATLAS detector from proton-proton collisions during the 2012 operation of the Large Hadron Collider at the center-of-mass energy, s=\sqrt{s} = 8~\tev. This dataset corresponds to an integrated luminosity of 20.2~\ifb. The inclusive \ttbar production cross section, \sigma_{\ttbar} is found to be \sigma_{\ttbar} = 231 \pm 3 {\rm (stat.)}^{+25}_{-25} {\rm (syst.)}\pm 3{\rm (lumi.)}~{\rm pb} for a top quark mass of 172.5~\gev. This result is consistent with the theoretical prediction \sigma^{\mathrm{SM}}_{\ttbar} = 253^{+13}_{-15}~{\rm pb}. Statistical analysis is performed to set a model independent upper limit on the visible cross section of any non Standard Model processes following frequentist probability. An upper limit on the branching ratio of the flavor changing neutral Higgs decay of the top quark to a charm quark is also calculated. The observed (expected) limit on the branching ratio at 95\% CL is BR(tch0)<\text{BR}(t \rightarrow ch^0) < 10\% (15\%)

    Implementation of ultrasonic sensing for high resolution measurement of binary gas mixture fractions

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    We describe an ultrasonic instrument for continuous real-time analysis of the fractional mixture of a binary gas system. The instrument is particularly well suited to measurement of leaks of a high molecular weight gas into a system that is nominally composed of a single gas. Sensitivity &#60; 5 × 10−5 is demonstrated to leaks of octaflouropropane (C3F8) coolant into nitrogen during a long duration (18 month) continuous study. The sensitivity of the described measurement system is shown to depend on the difference in molecular masses of the two gases in the mixture. The impact of temperature and pressure variances on the accuracy of the measurement is analysed. Practical considerations for the implementation and deployment of long term, in situ ultrasonic leak detection systems are also described. Although development of the described systems was motivated by the requirements of an evaporative fluorocarbon cooling system, the instrument is applicable to the detection of leaks of many other gases and to processes requiring continuous knowledge of particular binary gas mixture fractions

    PROFITABILITY ANALYSIS OF SUGARCANE PRODUCTION IN SOME SELECTED AREAS OF MANIKGANJ DISTRICT

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    A Thesis Submitted to the Faculty of Agribusiness Management Sher-e-Bangla Agricultural University, Dhaka, in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE IN DEVELOPMENT AND POVERTY STUDIESSugarcane is second in terms of cash crops and third in terms of key crops in the agricultural sector. The main objective of this research was to determine the profitability of sugarcane production. The district of Manikganj was chosen for the research due to its considerable sugarcane production. Through an interview schedule, data were gathered from 100 sample farmers using a simple random sampling approach. After analyzing the data, it was determined that the net return is Tk. 338936.00. Average total cost of sugarcane was estimated to be Tk. 211050.80 per hectare. The Benefit Cost Ratio (BCR) for sugarcane production was determined to be 2.61. While the regression coefficients for cost of MoP and cost of gypsum were all positive, the coefficients for cost of TSP and cost of cow dung were all negative and significant at various levels of significance. The human labor cost, cost of setts, cost of urea, cost of zinc, irrigation cost and pesticide cost were determined to be insignificant in relation to the return on sugarcane production. As a result, it was discovered that sugarcane production was very lucrative. Additionally, this research highlighted a number of problems and constrains related with sugarcane production. These were inadequate capitals, lack of proper knowledge, high price of input, low product price, labor scarcity in the peak period, delay payment of taka, theft of sugarcane and top cutting

    Oxygen Concentrators for Neonates in Low Resource Environments

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    ME450 Capstone Design and Manufacturing Experience: Fall 2020There is a need for low-resource portable, reliable, and robust oxygen provision device. The device must be appropriate to treat neonates experiencing RDS and hypoxia in clinical settings, and this project specifically targets Nepal. Requirements for this project were developed using the Target Product Profile from the World Health Organization.Caroline Soyars, Aim Tech Healthhttp://deepblue.lib.umich.edu/bitstream/2027.42/164437/1/Portable_Oxygen_Concentrator_Final_Report.pd

    An Empirical Studies on How the Developers Discussed about Pandas Topics

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    Pandas is defined as a software library which is used for data analysis in Python programming language. As pandas is a fast, easy and open source data analysis tool, it is rapidly used in different software engineering projects like software development, machine learning, computer vision, natural language processing, robotics, and others. So a huge interests are shown in software developers regarding pandas and a huge number of discussions are now becoming dominant in online developer forums, like Stack Overflow (SO). Such discussions can help to understand the popularity of pandas library and also can help to understand the importance, prevalence, difficulties of pandas topics. The main aim of this research paper is to find the popularity and difficulty of pandas topics. For this regard, SO posts are collected which are related to pandas topic discussions. Topic modeling are done on the textual contents of the posts. We found 26 topics which we further categorized into 5 board categories. We observed that developers discuss variety of pandas topics in SO related to error and excepting handling, visualization, External support, dataframe, and optimization. In addition, a trend chart is generated according to the discussion of topics in a predefined time series. The finding of this paper can provide a path to help the developers, educators and learners. For example, beginner developers can learn most important topics in pandas which are essential for develop any model. Educators can understand the topics which seem hard to learners and can build different tutorials which can make that pandas topic understandable. From this empirical study it is possible to understand the preferences of developers in pandas topic by processing their SO post

    Search for new phenomena in final states with an energetic jet and large missing transverse momentum in pp collisions at √ s = 8 TeV with the ATLAS detector

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    Results of a search for new phenomena in final states with an energetic jet and large missing transverse momentum are reported. The search uses 20.3 fb−1 of √ s = 8 TeV data collected in 2012 with the ATLAS detector at the LHC. Events are required to have at least one jet with pT > 120 GeV and no leptons. Nine signal regions are considered with increasing missing transverse momentum requirements between Emiss T > 150 GeV and Emiss T > 700 GeV. Good agreement is observed between the number of events in data and Standard Model expectations. The results are translated into exclusion limits on models with either large extra spatial dimensions, pair production of weakly interacting dark matter candidates, or production of very light gravitinos in a gauge-mediated supersymmetric model. In addition, limits on the production of an invisibly decaying Higgs-like boson leading to similar topologies in the final state are presente

    Search for chargino-neutralino production with mass splittings near the electroweak scale in three-lepton final states in √s=13 TeV pp collisions with the ATLAS detector

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    A search for supersymmetry through the pair production of electroweakinos with mass splittings near the electroweak scale and decaying via on-shell W and Z bosons is presented for a three-lepton final state. The analyzed proton-proton collision data taken at a center-of-mass energy of √s=13  TeV were collected between 2015 and 2018 by the ATLAS experiment at the Large Hadron Collider, corresponding to an integrated luminosity of 139  fb−1. A search, emulating the recursive jigsaw reconstruction technique with easily reproducible laboratory-frame variables, is performed. The two excesses observed in the 2015–2016 data recursive jigsaw analysis in the low-mass three-lepton phase space are reproduced. Results with the full data set are in agreement with the Standard Model expectations. They are interpreted to set exclusion limits at the 95% confidence level on simplified models of chargino-neutralino pair production for masses up to 345 GeV
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