bluuebunny/crossref_metadata_2025_split huggingface dataset:
Non-isolated multiple input multilevel output DC-DC converter for hybrid power system
Authors: Al-Modaffer Ameen M. , Chlaihawi Amer A. , Wahhab Husam A. 
Published: May 2020

<p><span>The utilization of multisources of energy in a compact and an effective power system gains an essential role in power electronic industry. As such, the design and simulation of a new non-isolated Multiple Input Multilevel Output (MIMLO) DC-DC converter for hybrid power system is presented. The MIMLO DC-DC converter can be integrated in renewable energy, such as fuel cells, wind turbines and photovoltaic arrays etc, to get the best output voltages. The MIMLO DC-DC converter powers the load from renewable energy sources through the independence of the availability of other sources. The proposed topology has been simulated by using MATLAB/Simulink software to testify the performance control operation of the Multiple Input Multilevel Output DC-DC converter. The results of the carried-out simulation favor the usage of multi-input voltage, rather than a single input voltage. The MIMLO design has the advantages of a simple configuration, reduced number of switches, fewer components, high efficiency, and high conversion ratio. The Multilevel Output DC-DC converter provides high voltage transfer with low size inductors, reduction of losses, low stress voltage on switches and diodes. </span></p>
Experimental investigation of photovoltaic thermal solar air collector with exergy performance comparison
Authors: Bahtiar Bahtiar , Zohri Muhammad , Fudholi Ahmad 
Published: May 2020

<span>The integration of photovoltaic technology and solar air collector is named a photovoltaic thermal (PVT) system. PVT system generates electricity as pumping power to fan DC and produces thermal energy together with to cooling PV panel. The experimental with the indoor and outdoor evaluation of PVT solar air collector have been compared at the chosen solar intensity of 820 W/m2. The mass flow rate is range from 0.01 kg/s to 0.05 kg/s. The exergy and efficiency exergy accuracy of PVT solar air collector between indoor and outdoor evaluation are 98.42%, 98.11% respectively. The exergy and exergy efficiency comparison results indicated that the indoor and outdoor investigation is suitable. </span>
Test suites effectiveness evolution in open source systems: empirical study
Authors: Akour Mohammed , Alenezi Mamdouh 
Published: May 2020

<span>Test suite code coverage is usually used to indicate the capability of a test suite in detecting faults. Earlier research studies, which explored the relationship among test suite effectiveness and code coverage, have not addressed this relationship evolutionally. Moreover, some of these works were studied small or identical domain systems, which make the result generalization process unclear for other systems. Finally, some of these studies were conducted with automatically generated test suites, which might not present the real situation for studied systems, so the results cannot be generalized to real test suites. In this paper, the authors empirically explore three open-source software systems along with their 11 versions. These versions are evolved over time and might have more sources of code and test suites. This work objective is to study the correlation between test suite effectiveness, the size of the test suite, and coverage for three Java programs during their evolution. In this work, the code coverage, test suite LOC and mutation testing coverage are measured to assess the correlation between the effectiveness of fault detection, code coverage, and test suite size. Based on the result we cannot generalize the assumption that test size is always revealing a positive correlation with its eﬀectiveness, but still weak to the high correlation between test effectiveness, test size, and coverage.</span><p> </p>
What is the Relationship between the Two Ancient Syriac Peshitta Versions of 1 Maccabees? A New Proposal that Challenges the Classical Explanation
Authors: Carbajosa Ignacio 
Published: May 2020

Abstract
The Syriac version of 1 Macc. that is preserved in Codex Ambrosianus (7a1) is very different from the one attested in the rest of the manuscripts of the Peshitta. This double attestation is typically explained by a hypothesis first put forward by G. Schmidt in 1897 that sees the version of 7a1 (Syr-2) as a revision of the original Syriac translation (Syr-1), which is the one attested in the majority of the manuscripts. This article aims to challenge this theory. In fact, this study shows that there is no relationship between Syr-1 and Syr-2, that is, Syr-2 cannot be considered a revision of Syr-1 (intended to eliminate additions), but must be understood as a new translation made from the Greek. For its part, Syr-1 is characterised by a number of double readings that could be interpreted as the work of an editor who preserves readings from two different Syriac versions of 1 Macc.
The First Book of Maccabees in Syriac: Dating and Context
Authors: Forness Philip Michael 
Published: May 2020

Abstract
Syriac literature exhibits interest in narratives associated with the Maccabees by the fourth century. Seventh-century manuscripts preserve two different Syriac translations of 1 Maccabees. The translation of this book into Syriac is not part of the Peshitta Old Testament translated from the Hebrew Bible in the second century CE. Its dating and the possible context for its production have not yet been the topic of scholarly investigation. This article examines quotations of and allusions to 1 Maccabees in Aphrahat, Ephrem, and the Martyrdom of Simeon bar Ṣabbāʿē. The last of these texts, likely produced in the early fifth century, offers the earliest evidence for a Syriac translation of 1 Maccabees. The production of a Syriac translation of 1 Maccabees in the fourth or perhaps early fifth century reflects efforts of Christian communities around this time to appropriate the Maccabean narrative for their own interests.
Marginalia to the Qillirian Rhyme System
Authors: Rand Michael 
Published: May 2020

Michael Rand draws attention to some features in the so-called ‘Qillirian’ rhyme scheme, named after the great poet
Eleazar be-Rabbi Qillir, who invented and introduced it into Hebrew piyyuṭ. In piyyuṭim with this type of rhyme, morphological elements, namely, two root consonants, form the basis of rhymes. Rand elucidates different ways in which this feature is implemented and how it may encompass both a linguistic reality and a poetic tool. Some rhymes reflect historical phonetic changes that took place in the pronunciation of Hebrew; others constitute poetic techniques. It is shown that in some cases /a/ rhymes with /e/, which is likely to reflect a phonetic reality rooted in the speech of the poets.
Calibrating Human Attention as Indicator Monitoring #drought in the Twittersphere
Authors: Smith Kelly Helm , Tyre Andrew J. , Tang Zhenghong , Hayes Michael J. , Akyuz F. Adnan 
Published: May 2020

AbstractState climatologists and other expert drought observers have speculated about the value of monitoring Twitter for #drought and related hashtags. This study statistically examines the relationships between the rate of tweeting using #drought and related hashtags, within states, accounting for drought status and news coverage of drought. We collected and geolocated tweets, 2017–18, and used regression analysis and a diversity statistic to explain expected and identify unexpected volumes of tweets. This provides a quantifiable means to detect state-weeks with a volume of tweets that exceeds the upper limit of the prediction interval. To filter out instances where a high volume of tweets is related to the activities of one person or very few people, a diversity statistic was used to eliminate anomalous state-weeks where the diversity statistic did not exceed the 75th percentile of the range for that state’s diversity statistic. Anomalous state-weeks in a few cases preceded the onset of drought but more often coincided with or lagged increases in drought. Tweets are both a means of sharing original experience and a means of discussing news and other recent events, and anomalous weeks occurred throughout the course of a drought, not just at the beginning. A sum-to-zero contrast coefficient for each state revealed a difference in the propensity of different states to tweet about drought, apparently reflecting recent and long-term experience in those states, and suggesting locales that would be most predisposed to drought policy innovation.
Principal Component Analysis for Extremes and Application to U.S. Precipitation
Authors: Jiang Yujing , Cooley Daniel , Wehner Michael F. 
Published: May 2020

AbstractWe propose a method for analyzing extremal behavior through the lens of a most efficient basis of vectors. The method is analogous to principal component analysis, but is based on methods from extreme value analysis. Specifically, rather than decomposing a covariance or correlation matrix, we obtain our basis vectors by performing an eigendecomposition of a matrix that describes pairwise extremal dependence. We apply the method to precipitation observations over the contiguous United States. We find that the time series of large coefficients associated with the leading eigenvector shows very strong evidence of a positive trend, and there is evidence that large coefficients of other eigenvectors have relationships with El Niño–Southern Oscillation.
Near-Surface Salinity Reveals the Oceanic Sources of Moisture for Australian Precipitation through Atmospheric Moisture Transport
Authors: Rathore Saurabh , Bindoff Nathaniel L. , Ummenhofer Caroline C. , Phillips Helen E. , Feng Ming 
Published: May 2020

AbstractThe long-term trend of sea surface salinity (SSS) reveals an intensification of the global hydrological cycle due to human-induced climate change. This study demonstrates that SSS variability can also be used as a measure of terrestrial precipitation on interseasonal to interannual time scales, and to locate the source of moisture. Seasonal composites during El Niño–Southern Oscillation/Indian Ocean dipole (ENSO/IOD) events are used to understand the variations of moisture transport and precipitation over Australia, and their association with SSS variability. As ENSO/IOD events evolve, patterns of positive or negative SSS anomaly emerge in the Indo-Pacific warm pool region and are accompanied by atmospheric moisture transport anomalies toward Australia. During co-occurring La Niña and negative IOD events, salty anomalies around the Maritime Continent (north of Australia) indicate freshwater export and are associated with a significant moisture transport that converges over Australia to create anomalous wet conditions. In contrast, during co-occurring El Niño and positive IOD events, a moisture transport divergence anomaly over Australia results in anomalous dry conditions. The relationship between SSS and atmospheric moisture transport also holds for pure ENSO/IOD events but varies in magnitude and spatial pattern. The significant pattern correlation between the moisture flux divergence and SSS anomaly during the ENSO/IOD events highlights the associated ocean–atmosphere coupling. A case study of the extreme hydroclimatic events of Australia (e.g., the 2010/11 Brisbane flood) demonstrates that the changes in SSS occur before the peak of ENSO/IOD events. This raises the prospect that tracking of SSS variability could aid the prediction of Australian rainfall.
Whither the Chukchi Slope Current?
Authors: Boury Samuel , Pickart Robert S. , Odier Philippe , Lin Peigen , Li Min , Fine Elizabeth C. , Simmons Harper L. , MacKinnon Jennifer A. , Peacock Thomas 
Published: May 2020

AbstractRecent measurements and modeling indicate that roughly half of the Pacific-origin water exiting the Chukchi Sea shelf through Barrow Canyon forms a westward-flowing current known as the Chukchi Slope Current (CSC), yet the trajectory and fate of this current is presently unknown. In this study, through the combined use of shipboard velocity data and information from five profiling floats deployed as quasi-Lagrangian particles, we delve further into the trajectory and the fate of the CSC. During the period of observation, from early September to early October 2018, the CSC progressed far to the north into the Chukchi Borderland. The northward excursion is believed to result from the current negotiating Hanna Canyon on the Chukchi slope, consistent with potential vorticity dynamics. The volume transport of the CSC, calculated using a set of shipboard transects, decreased from approximately 2 Sv (1 Sv ≡ 106 m3 s−1) to near zero over a period of 4 days. This variation can be explained by a concomitant change in the wind stress curl over the Chukchi shelf from positive to negative. After turning northward, the CSC was disrupted and four of the five floats veered offshore, with one of the floats permanently leaving the current. It is hypothesized that the observed disruption was due to an anticyclonic eddy interacting with the CSC, which has been observed previously. These results demonstrate that, at times, the CSC can get entrained into the Beaufort Gyre.
Sounding Characteristics that Yield Significant Convective Inhibition Errors due to Ascent Rate and Sensor Response of In Situ Profiling Systems
Authors: Houston Adam L. , Keeler Jason M. 
Published: May 2020

AbstractAccurate measurements of the convective inhibition (CIN) associated with capping inversions are critical to forecasts of deep convection initiation. The goal of this work is to determine the sounding characteristics most vulnerable to CIN errors arising from hysteresis associated with sensor response and ascent rate of profiling systems. This examination uses 5058 steady-state analytic soundings prescribed using three free parameters that control inversion depth, static stability, and moisture content. A theoretical well-aspirated first-order sensor mounted on a platform that does not disturb its environment is “flown” in these soundings. Sounding characteristics that result in the largest relative CIN errors are also the characteristics that result in the smallest CIN. Because they are more likely to support deep convection initiation, it is particularly critical that environments with small CIN are represented accurately. The relationship between relative CIN error and CIN exists because sounding characteristics that contribute to large CIN do not proportionally increase the CIN error. Analysis also considers CIN intervals with (operationally important) CIN on the threshold between environments that will and will not support deep convection initiation. For these soundings, CIN error is found to be largest for deep, dry inversions characterized by small static stability.
What is the Intrinsic Predictability of Tornadic Supercell Thunderstorms?
Authors: Markowski Paul M. 
Published: May 2020

AbstractA 25-member ensemble of relatively high-resolution (75-m horizontal grid spacing) numerical simulations of tornadic supercell storms is used to obtain insight on their intrinsic predictability. The storm environments contain large and directionally varying wind shear, particularly in the boundary layer, large convective available potential energy, and a low lifting condensation level. Thus, the environments are extremely favorable for tornadic supercells. Small random temperature perturbations present in the initial conditions trigger turbulence within the boundary layers. The turbulent boundary layers are given 12 h to evolve to a quasi–steady state before storms are initiated via the introduction of a warm bubble. The spatially averaged environments are identical within the ensemble; only the random number seed and/or warm bubble location is varied. All of the simulated storms are long-lived supercells with intense updrafts and strong mesocyclones extending to the lowest model level. Even the storms with the weakest near-surface rotation probably can be regarded as weakly tornadic. However, despite the statistically identical environments, there is considerable divergence in the finescale details of the simulated storms. The intensities of the tornado-like vortices that develop in the simulations range from EF0 to EF3, with large differences in formation time and duration also being exhibited. The simulation differences only can be explained by differences in how the initial warm bubbles and/or storms interact with turbulent boundary layer structures. The results suggest very limited intrinsic predictability with respect to predicting the formation time, duration, and intensity of tornadoes.
Assessing the Impact of Stochastic Perturbations in Cloud Microphysics using GOES-16 Infrared Brightness Temperatures
Authors: Griffin Sarah M. , Otkin Jason A. , Thompson Gregory , Frediani Maria , Berner Judith , Kong Fanyou 
Published: May 2020

AbstractIn this study, infrared brightness temperatures (BTs) are used to examine how applying stochastic perturbed parameter (SPP) methodology to the widely used Thompson–Eidhammer cloud microphysics scheme impacts the cloud field in high-resolution forecasts. Modifications are made to add stochastic perturbations to three parameters controlling cloud generation and dissipation processes. Two five-member ensembles are generated, one using the microphysics parameter perturbations (SPP-MP) and another where white noise perturbations were added to potential temperature fields at initialization time (Control). The impact of the SPP method was assessed using simulated and observed GOES-16 BTs. This analysis uses pixel-based and object-based methods to assess the impact on the cloud field. Pixel-based methods revealed that the SPP-MP BTs are slightly more accurate than the Control BTs. However, too few pixels with a BT lower than 270 K result in a positive bias compared to the observations. A negative bias compared to the observations is observed when only analyzing lower BTs. The spread of the ensemble BTs was analyzed using the continuous ranked probability score differences, with the SPP-MP ensemble BTs having less (more) spread during May (January) compared to the Control. Object-based analysis using the Method for Object-Based Diagnostic Evaluation revealed the upper-level cloud objects are smaller in the SPP-MP ensemble than the Control but a lower bias exists in the SPP-MP BTs compared to the Control BTs when overlapping matching objects. However, there is no clear distinction between the SPP-MP and Control ensemble members during the evolution of objects, Overall, the SPP-MP perturbations result in lower BTs compared to the Control ensemble and more cloudy pixels.
US Trade Actions Against China: A Supply Chain Perspective
Authors: Walmsley Terrie , Minor Peter 
Published: May 2020

In 2018, the United States (US) Administration initiated several trade actions, including tariffs on China for unfair trade practices outlined by the US Trade Representative (USTR). In response, China filed requests for consultations with the World Trade Organization (WTO) and has implemented or threatened to implement increased tariffs on US products. In this article, the implications of current and potential US trade actions and responses by China on the US and global economy are estimated. We employ a dynamic supply chain model based on the widely used Global Trade Analysis Project (GTAP) Data Base and model. Our analysis finds that US gross domestic product (GDP) would be reduced by a projected –0.86 per cent in 2030 (or US$227.8 billion in 2017 dollars), as the role of the USA in global supply chains declines significantly. China’s GDP would also decline considerably by 2.84 per cent as a result of the actions imposed against it, while the rest of the world gain, as they fill the gaps left by US and Chinese producers. JEL: F16, C68
Mood Disorders in Late Life: A Population-based Analysis of Prevalence, Risk Factors, and Consequences in Community-dwelling Older Adults in Ontario: Troubles de l’humeur en âge avancé : Une analyse dans la population de la prévalence, des facteurs de risque et des conséquences chez des adultes âgés vivant en milieu communautaire en Ontario
Authors: Strauss Rachel , Kurdyak Paul , Glazier Richard H. 
Published: May 2020

Objective: Mental health issues in late life are a growing public health challenge as the population aged 65 and older rapidly increases worldwide. An updated understanding of the causes of mood disorders and their consequences in late life could guide interventions for this underrecognized and undertreated problem. We undertook a population-based analysis to quantify the prevalence of mood disorders in late life in Ontario, Canada, and to identify potential risk factors and consequences. Method: Individuals aged 65 or older participating in 4 cycles of a nationally representative survey were included. Self-report of a diagnosed mood disorder was used as the outcome measure. Using linked administrative data, we quantified associations between mood disorder and potential risk factors such as demographic/socioeconomic factors, substance use, and comorbidity. We also determined associations between mood disorders and 5-year outcomes including health service utilization and mortality. Results: The prevalence of mood disorders was 6.1% (4.9% among males, 7.1% among females). Statistically significant associations with mood disorders included younger age, female sex, food insecurity, chronic opioid use, smoking, and morbidity. Individuals with mood disorders had increased odds of all consequences examined, including placement in long-term care (adjusted odds ratio [OR] =2.28; 95% confidence interval [CI], 1.71 to 3.02) and death (adjusted OR = 1.35; 95% CI, 1.13 to 1.63). Conclusions: Mood disorders in late life were strongly correlated with demographic and social/behavioral factors, health care use, institutionalization, and mortality. Understanding these relationships provides a basis for potential interventions to reduce the occurrence of mood disorders in late life and their consequences.
Percutaneous Oblique Distal Osteotomy of the Fifth Metatarsal for Bunionette Correction
Authors: Ferreira Gabriel Ferraz , dos Santos Tatiana Ferreira , Oksman Daniel , Pereira Filho Miguel Viana 
Published: May 2020

Background: Bunionette is a common foot disorder, and several types of corrective surgery have been described. With the popularization of minimally invasive surgeries, the forefoot region has become a suitable area for this type of technique. The aim of this study was to evaluate the results of oblique distal osteotomy of the fifth metatarsal adapted for a percutaneous approach. Methods: We prospectively evaluated 31 consecutive tailor’s bunion patients who underwent operative correction on a total of 42 feet between 2017 and 2019 after failure of conservative treatment. Clinical outcomes such as pain (visual analog scale [VAS]), function (American Orthopaedic Foot & Ankle Society [AOFAS] Lesser Toe Metatarsophalangeal-Interphalangeal Scale scoring system), personal satisfaction, and complications were evaluated. Radiographic aspects were also examined. Shapiro and Mann-Whitney statistical tests were conducted. The average age of the patients was 69.5 years, and the average follow-up was 13.1 months. Results: After the operative procedure, there was a decrease of 6.6 points on the VAS for pain ( P < .001) and an increase of 34.9 in the AOFAS score ( P < .001). Radiographic correction was achieved for both the fifth metatarsophalangeal angle ( P < .001) and the intermetatarsal angle ( P < .001), which showed decreased values. There was 1 case of superficial infection and 2 cases of nonunion (asymptomatic). A large majority of patients regarded the procedure outcome as satisfactory. Conclusion: This percutaneous oblique distal osteotomy of the fifth metatarsal for bunionette deformity produced improvements in pain and function and a high rate of satisfaction, with a low incidence of complications and a high capacity for correcting the deformity. Level of Evidence: Level II, prospective cohort study.