Miracle-dz/UniFAR-FTUs huggingface dataset:
A quantitative framework for testing the resilience of Islamic finance portfolios under IFSB and Basel capital rules

Purpose This paper aims to introduce a model-based stress-testing methodology for Islamic finance products. The importance of stress testing was indeed clearly underlined by the adverse developments in the global finance industry. One of the key takeaways was the need to strengthen the coverage of the capital framework. Cognisant of this fact, Basel III encapsulates provisions to enhance the financial sector’s ability to withstand shocks arising from possible stress events, thereby reducing adverse spillovers into the real economy. Similarly, the Islamic Financial Services Board requires Islamic financial institutions to run stress tests as part of capital planning. Design/methodology/approach The authors perform thorough backtests on Islamic and conventional portfolios under widely used risk models, which are characterised by an underlying conditional volatility framework and distribution, to identify the most suitable risk model specification. Associated with an appropriate initial shock and estimation window size, the paper also conducts a model-based stress test to examine whether the stress losses estimated by the selected models compare favourably to the historical shocks. Findings The results suggest that the model-based framework, when combined with an appropriate risk model and distribution, can successfully reproduce past stress periods. The conditional empirical risk model is the most effective one in both long and short portfolio cases – particularly when combined with a long-enough estimation window. The relative performance of normal vs heavy-tailed distributions and symmetric vs asymmetric risk models, on the other hand, is highly dependent on whether the portfolio is long or short. Finally, the authors find that the Islamic portfolio is generally associated with lower historical stress losses as compared to the conventional portfolio. Originality/value The model-based framework eliminates some of the key problems associated with traditional scenario-based approaches and is easily adaptable to Islamic finance.
Landowners and Democracy: The Social Origins of Democracy Reconsidered

Are large landowners, especially those engaged in labor-dependent agriculture, detrimental to democratization and the subsequent survival of democracy? This assumption is at the heart of both canonical and recent influential work on regime transition and durability. Using an original panel data set on the extent of labor-dependent agriculture in countries across the world since 1930, the author finds that labor-dependent agriculture was indeed historically bad for democratic stability and stunted the extension of suffrage, parliamentary independence, and free and fair elections. However, the negative influence of labor-dependent agriculture on democracy started to turn positive around the time of democracy’s third wave. The dual threats of land reform and costly domestic insurgencies in that period—often with more potent consequences under dictators—plausibly prompted landowners to push for democracy with strong horizontal constraints and favorable institutions that could protect their property more reliably over the long term than could dictatorship. The shift in support for democracy by labor-dependent landowners is a major untold story of democracy’s third wave and helps explain the persistent democratic deficit in many new democracies.
Branch Patch Reconstruction in Living Donor Liver Transplantation: Arterialization of Grafts with Replaced Type Arteries

We developed a hepatic arterialization technique in living donor liver transplantation. The technique was indicated in patients with a left graft from donors with a right hepatic artery originated from superior mesenteric artery or a right graft from donors with a left hepatic artery from left gastric artery. The donor common hepatic and gastroduodenal arteries were split. On the recipient side, left and right hepatic arteries or branches of the right hepatic artery were split, received patch plasty, and anastomosed with the graft arteries under loupe observation. Livers from 25 donors were procured (16 right livers and 9 left livers) using this technique. There were no vascular complications in the donors. Three recipients died due to infectious disease with arterial patency. The remaining 22 recipients survived without hepatic arterial thrombosis. In limited situations, this technique can be adapted for living donor liver transplantation without increasing donor complications.
Testing for Long-memory and Chaos in the Returns of Currency Exchange-traded Notes (ETNs)

The study uses autoregressive fractionally integrated moving average â€“Â fractionally integrated generalized autoregressive conditional heteroskedasticityÂ (ARFIMA-FIGARCH) models and chaos effects to determine nonlinearityÂ properties present on currency ETN returns. The results find that the volatilitiesÂ of currency ETNs have long-memory, non-stationarity and non-invertibilityÂ properties. These findings make the research conclude that mean reversion is aÂ possibility and that the efficient market hypothesis of Fama (1970) becameÂ ungrounded on these investment instruments. For the chaos effect, the BDS testÂ finds that ETN returns and ARMA residuals also exhibit random processes,Â making conventional linear methodologies not appropriate for their analysis. Â The R/S analysis shows that currency ETN returns, ARMA and GARCH residualsÂ have chaotic properties and are trend-reinforcing series. On the other hand, theÂ correlation dimension analyses further confirmed that the utilized time-series haveÂ deterministic chaos properties. Thus, investors trying to predict returns andÂ volatility of currency ETNs would fail to produce accurate findings because ofÂ their unstable structures, confirming their non-linear properties.JEL classification numbers: G10, G15Keywords: Currency ETNs, Long-memory Properties, ARFIMA-FIGARCH,Â Chaos Effects.
Mean Reversion Trading with Sequential Deadlines and Transaction Costs

We study the optimal timing strategies for trading a mean-reverting price process with afinite deadline to enter and a separate finite deadline to exit the market. The price process is modeled by a diffusion with an affine drift that encapsulates a number of well-known models,including the Ornstein-Uhlenbeck (OU) model, Cox-Ingersoll-Ross (CIR) model, Jacobi model,and inhomogeneous geometric Brownian motion (IGBM) model.We analyze three types of trading strategies: (i) the long-short (long to open, short to close) strategy; (ii) the short-long(short to open, long to close) strategy, and (iii) the chooser strategy whereby the trader has the added flexibility to enter the market by taking either a long or short position, and subsequently close the position. For each strategy, we solve an optimal double stopping problem with sequential deadlines, and determine the optimal timing of trades. Our solution methodology utilizes the local time-space calculus of Peskir (2005) to derive nonlinear integral equations of Volterra-type that uniquely characterize the trading boundaries. Numerical implementation ofthe integral equations provides examples of the optimal trading boundaries.
DNA homology comparison between American and European Borrelia burgdorferi strains.

Seven strains of Borrelia burgdorferi isolated from ticks and from human beings in Europe and U.S.A. were analyzed for DNA restriction patterns with several enzymes and for DNA homology in Southern blot hybridizations. The restriction patterns showed a moderately high variability. In Southern blot hybridization, strain B31 (U.S.A.) DNA gave a strong signal with itself, strain Bsf (U.S.A.) and Alcaide (isolated in Italy but presumably contracted in Venezuela). Strain B45 (F.R.G.) hybridized to itself, strain BITS (Italy) and to strain D.A. (Italy). Strain Nancy (Italy) gave a signal only when hybridized to itself, although it was classified as Borrelia on the basis of the clinical manifestations, SDS-PAGE protein pattern and antigenic determinants. No hybridization differences were observed for strains isolated from different hosts in the same continental geographical area.
Scaffolding Fidelity and Adaptation in Educational Program Implementation: Experimental Evidence From a Literacy Intervention

In a common approach for scaling up effective educational practice, schools adopt evidence-based programs to be implemented with fidelity. An alternative approach assumes that programs should be adapted to local contexts. In this randomized trial of a reading intervention, we study a scaffolded sequence of implementation in which schools first develop proficiency by implementing the program with fidelity before implementing structured adaptations. We find evidence supporting the scaffolded sequence: A fidelity-focused approach promoted learning and instructional change more so for teachers inexperienced with the intervention, while a structured adaptive approach was more effective for teachers experienced with the intervention. Students benefited more from the structured adaptive approach but only when their teacher had prior experience with the fidelity-focused version.
Distributed intelligence for smart grid control

This paper provides an overview of the challenges, their potential solutions and the trends in the control of electrical power distribution in presence of distributed generation. Power grids are supposed to go through a significant transformation in the close future. Distribution is supposed to be mostly affected. The tutorial reviews the current practice and outlines the possible evolutions towards a more intelligent grid able to operate more dynamically mostly under the hypothesis of a large penetration of renewable energy sources or distributed energy sources more in general. Some specific topics are then addressed with reference to recent research results such network-based control, distributed state estimation and distributed intelligence.
DxTer : A Program Synthesizer for Dense Linear Algebra

DxTer is a tool that generates a search space of implementations for operations in dense linear algebra and uses cost functions to select automatically the most efficient implementation from the space. We describe how DxTer generates this space and the optimizations it uses to reduce the size of the space to improve its runtime, such as employing phases of generation.
Fluorescence lifetime imaging in retinal artery occlusion.

PURPOSE Fluorescence lifetime imaging ophthalmoscopy is a technique to measure decay times of endogenous retinal fluorophores. The purpose of this study was to investigate fluorescence lifetimes in eyes with central and branch retinal artery occlusion. METHODS Twenty-four patients with central or branch retinal artery occlusion were included in this study. The contralateral unaffected fellow eye was used as control. Measurements were performed using a fluorescence lifetime imaging ophthalmoscope based on a HRA Spectralis system. Fluorescence excitation wavelength was 473 nm, and mean lifetimes were measured in a short (498-560 nm) and in a long (560-720 nm) spectral channel. Fluorescence lifetimes in the area of retinal artery occlusion were measured and compared to corresponding areas in contralateral unaffected eyes. Additionally, findings were correlated to optical coherence tomography measurements. RESULTS Retinal lifetime images of 24 patients with retinal artery occlusion were analyzed. Mean retinal fluorescence lifetimes were prolonged by 50% in the short and 20% in the long spectral channel in ischemic retinal areas up to 3 days after retinal artery occlusion compared to the contralateral unaffected eyes. In the postacute disease stage there was no difference between the lifetimes of affected areas and unaffected fellow eyes. CONCLUSIONS Retinal artery occlusion leads to significantly longer fluorescence lifetimes of the retina in the acute phase and may serve as a useful indicator for acute ischemic retinal damage.
Occurrence of leptospirosis among suspected cases in Chennai, Tamil Nadu.

OBJECTIVE To evaluate the serological profile of leptospirosis by microscopic agglutination test (MAT) and dark field microscopy (DFM) and to determine the serovar prevalence rate among patients with pyrexia of unknown origin. MATERIALS AND METHODS A total of 3830 blood samples were received from different hospitals and laboratories in and around Chennai. They were screened for leptospirosis by MAT and direct observation of live Leptospira by DFM. RESULTS A total of 748 (19.5%) Leptospira positive cases were identified; among these, 36.76% were Leptospira australis, 30% were Leptospira canicola, 14.57% were Leptospira autumnalis, 12% were Leptospira icterohaemorrhagiae, 4.68% were Leptospira patoc and 1.87% were Leptospira grippotyposa. Patients were in the age group of 1-86 years, with a median age of 43.5 years. 50% positive cases were in the age group of 10-35 years. Majority of the Leptospira infected cases were males (62.98%) than females (37.02%). CONCLUSION Leptospirosis occurs in Chennai throughout the year although the number and positivity of cases increased during the monsoon season.
Performance and diversification benefits of foreign-equity ETFs in emerging markets

ABSTRACT This study provides a comprehensive review of the risk-return characteristics, performance and international diversification benefits of an uncharted fast-growing segment of the global exchange-traded fund (ETF) market by examining 17 foreign-equity ETFs traded in 6 emerging markets. The results indicate that the sample ETFs domiciled in these economies perform poorly providing relatively low returns while exposing emerging market investors to substantial total and systematic risks. In addition, these ETFs are found to be more sensitive to downside risk, making them relatively more vulnerable to market downturns. Although the foreign-equity ETFs are designed to provide investors with full international diversification benefits, we find that they are significantly affected by their local market conditions and sentiments, making them ineffective international diversification tools.
Assessment of the Economic, Social and Environmental Dimensions of the Indicators for Sustainable Development

Nine different indices for measuring sustainable development, comprising Change in Wealth Index (CWI), Ecological Footprint (EF), Environmental Performance Index (EPI), Environmental Sustainability Index (ESI), Genuine Savings Index (GSI), Global Well‐Being Index (GWI), Happy Planet Index (HPI), Human Development Index (HDI) and Sustainable Society Index (SSI) were selected in this study. The indices were analysed for their ability to measure the economic, environmental and social dimensions of sustainable development. Only two indices (SSI and GSI) considered all three dimensions of sustainable development, while the remaining measured either the socio‐economic, socio‐environmental or just economic and environmental dimensions. A normalized average sustainability index (NASI) was proposed in this study, calculated as an average index of all nine. Switzerland, Norway and Sweden were the countries with the highest, while Burundi, Sierra Leone and Niger were the countries with the lowest NASI scores. The deviation of each index compared with NASI was determined, resulting in GWI followed by HDI having the lowest deviation from the average rankings. The publication contribution of the scientific literature towards the three dimensions of sustainable development for each individual index was further analysed and discussed, identifying public health as one of the potential overarching indicators for sustainable development. Copyright © 2016 John Wiley & Sons, Ltd and ERP Environment
Characteristics of liver grafts in living-donor adult liver transplantation: comparison between right- and left-lobe grafts.

HYPOTHESIS Few studies have investigated the results of research focused on living-donor adult liver transplantation. Different characteristics between right- and left-lobe grafts have not yet been clarified in living-donor adult liver transplantation. Left-lobe graft remains an important option, even in adult recipients. SETTING A single liver transplantation center with a long history of hepatic resection. PATIENTS Forty-five donors received left-lobe (n = 39) and right-lobe (n = 6) grafts. The clinicopathological data for the donor, graft, and recipient were compared. All left-lobe grafts were extended grafts that included the middle hepatic vein, and 24 of the 39 left-lobe grafts included the left caudate lobe. No right-lobe graft included a middle hepatic vein. RESULTS The postoperative aspartate aminotransferase and total bilirubin values of the donor in the right-lobe graft group were higher, and the postoperative hospital stay was longer than in the left-lobe graft group. Graft weight in the left-lobe graft group was lighter than in the right-lobe graft group (median weight, 450 vs 675 g). The median graft weight divided by the standard liver volume in the left-lobe graft group was 41% (range, 21%-66%), compared with 52% (range, 47%-75%) in the right-lobe graft group. We found no difference in terms of the incidence of postoperative complications between groups. No difference in induced complications of small-for-size grafts such as intractable ascites and persistent hyperbilirubinemia was evident between groups. The survival rate for grafts at 18 months was 75.0% in the right-lobe graft group compared with 85.6% in the left-lobe group. In the right-lobe graft group, we found a few cases in which a marked poor-perfusion area in the anterior segment caused liver dysfunction. CONCLUSIONS Left-lobe grafts are a feasible option for living-donor adult liver transplantation, and in the case of right-lobe grafts, hepatic venous drainage is one of the most critical problems.
The effects of erythropoietin, dextran and saline on brain edema and lipid peroxidation in experimental head trauma.

BACKGROUND The aim of this study was to investigate the protective effects of erythropoietin, dextran/saline and erythropoietin in combination with dextran/saline on brain edema and lipid peroxidation following traumatic brain injury in rats. METHODS In the study, 40 male 3-month-old albino Wistar rats, weighing 250-340 g, were divided into four groups, each consisting of ten rats. Traumatic brain injury was induced in all rats by the weight-drop method, and erythropoietin (5,000 U/kg) and/or dextran and saline (8 ml/kg) solutions were injected intraperitoneally ten minutes after trauma. Control animals received an equal volume of serum physiologic. All rats were sacrificed 24 hours later. Glutathione peroxidase activity and malondialdehyde levels were measured in the left hemisphere, and edema was quantitated by the wet-dry method. RESULTS Brain edema and the levels of malondialdehyde, the last product of lipid peroxidation in tissues, were decreased variably, and the activity of glutathione peroxidase, an antioxidant enzyme, was increased in others compared with the control group. CONCLUSION In this study, it was concluded that the brain edema that developed in rats on which head trauma was induced and the secondary brain damage caused by oxidative stress could be deceased using a combination of erythropoietin, dextran, and saline.
Clinical Evaluation of the BD ProbeTec™ Neisseria gonorrhoeae Qx Amplified DNA Assay on the BD Viper™ System With XTR™ Technology

Background: The excellent sensitivity and specificity of commercially available nucleic acid amplification tests (NAATs) for the identification of Neisseria gonorrhoeae have been demonstrated. This study evaluated the performance of the BD ProbeTec™ N. gonorrhoeae Qx (GCQ) Amplified DNA Assay on the BD Viper™ System with XTR™ Technology in a multicenter study. Methods: Specimens were collected at 7 geographically diverse clinical sites from 1846 women and men attending sexually transmitted disease, family planning, and obstetrics and gynecology clinics. There were 1768 evaluable participants, 994 women and 774 men. GCQ results from female endocervical, self-collected vaginal, male urethral swab specimens, and male and female neat (unpreserved) urine specimens, as well as those obtained using the urine preservative transport (UPT) tube for the GCQ assay were compared with patient infected status (PIS). For each participant, PIS was determined based on the combined results from the reference assays Aptima Combo 2® (AC2) and BD ProbeTec™ ET GC Amplified DNA Assay (PT). Results: The sensitivity versus PIS for endocervical, vaginal, and female UPT urine, and female neat urine samples was 98.5%, 100.0%, 98.5%, and 96.9%, respectively; the specificity was 99.7%, 99.1%, 99.7%, and 99.5%, respectively. The sensitivity versus PIS for male urethral swabs and both male UPT and neat urine was 100.0%, with specificities of 99.1% for the urethral swab and UPT urine and 98.9% for the neat urine. The overall GCQ assay performance was not statistically different from that of AC2 or PT. Conclusions: The GCQ assay demonstrated performance characteristics comparable with other commercially available nucleic acid–based tests such as AC2 and PT. Vaginal swabs, endocervical swabs, urethral swabs, and urine specimens may all be used for gonorrhea screening.
Soluble P-selectin is a marker of plaque destabilization in unstable angina.

Unstable coronary syndromes usually involve platelet activation and thrombus formation at the site of atherosclerotic plaque. P-selectin in platelets and endothelial cells mediates adhesive interaction with leucocytes to form thrombi. The aim of this study was to asses the level of soluble P-selectin (CD62P) as a non invasive marker of coronary plaque destabilization in unstable angina (U.A.). Serum samples were collected from 23 male patients with UA, 20 male patients with stable angina (SA) and 13 healthy controls. Soluble P-selectin (sP-selectin) level was measured by ELISA technique. The mean sP-selectin level was significantly higher in patients with UA (87.6+/-30.10 ng/ml) than SA (36.2 +/-13.8 ng/ml) and control subjects (16.7+/-8.6 ng/ml). In conclusion, s-Pslectin level could be used as a marker of plaque destabilization in unstable angina.
Relation between Physical Activity and Academic Performance in 3rd-Year Secondary Education Students

The main aim of this study was to analyze the relationship between the amount of physical activity and academic performance in 3rd-year secondary education students. The sample was taken from three secondary schools in the area of Barcelona. 284 students (158 girls, 126 boys) with an average age of 14.7 yr. participated. The International Physical Activity Questionnaire was used by students to self-report their amount of physical activity. Students' academic records were obtained for comparisons. Results showed that there was a linear relationship between academic performance and physical activity; nevertheless, there was a trend to stronger correlation when modeling the relationship between these variables with a quadratic equation. Further research should focus on whether academic performance and physical activity might be better explained with a second-order equation.