bluuebunny/crossref_metadata_2025_split huggingface dataset:
Modeling temperature profile in mass concrete at early ages of cement hydration
Authors: Donald Chidiebere Ugwuanyi , Fidelis Onyebuchi Okafor 
Published: October 2021

Thermally induced cracks due to temperature gradient in mass concrete have adverse effects on its durability and service life. Heat released during the hydration of Portland cement in early age mass concrete can be quite excessive depending on the ambient temperature, cement content of the concrete mix and the size. Finite difference model using Crank Nicholson implicit method was developed based on the two dimensional unsteady state heat conduction. Optimized MATLAB based software was developed for simulation and data visualization. A mass concrete block cast with standard mix ratio and water cement ratio was used to verify the efficacy of the model. Type-K thermocouple and digital thermometer were used to monitor the temperature at time intervals. The temperature profile showed a hotter core and cooler surface except for the initial placement temperature, which exhibited a uniform temperature for all thermocouple locations. Peak temperature values were recorded within the first day of concrete placement. The model successfully predicted the temperature profile of the mass concrete at early ages of cement hydration. With the knowledge of the ambient temperature and the configuration of the mass concrete, the model can reliably predict the temperature profile from which potential for thermal cracks occurrence can be determined to enable suitable proactive preventive and control measures.Â Â
Assessing readiness for knowledge management implementation in mental hospitals, Indonesia
Authors: Rohajawati Siti , Akbar Habibullah 
Published: October 2021

For Southeast Asiaâ€™s largest population, the prevalence of the emotional disorder has increased from 6% in 2013 up to 9.8% in 2018. Aligned with the e-government program, Knowledge Management (KM) offers an easier, faster, and transparent mental health services. However, the implementation relies on various factors. We conducted a workshop at 7 (seven) mental hospitals. The questionnaires were used to identify the factors that consist of awareness & commitment, strategy, culture, structure, people, and information technology (IT). We examine the hypothesis factors of the relationship by employing the statistical analyses of correlation. This study provides at testing the relationship between factors of people, process, and technology, for KM implementation in Indonesian mental hospitals. The results of the study confirm that the relationship between Process to Technology and People has a positive effect on significance. Meanwhile, the adop-tion of the existing technical facilities have not significant support for the needs of the KM. To sum up, the study suggests further improve-ment of leadership and systems in order to serve the best of mental healthcare.Â Â
Data mining based investigation of the impact of imbalanced dataset over fractured zone detection
Authors: Azizi Haleh , Reza Hassan 
Published: October 2021

Several studies have been conducted in recent years to discriminate between fractured (FZs) and non-fractured zones (NFZs) in oil wells. These studies have applied data mining techniques to petrophysical logs (PLs) with generally valuable results; however, identifying fractured and non-fractured zones is difficult because imbalanced data is not treated as balanced data during analysis. We studied the importance of using balanced data to detect fractured zones using PLs. We used Random-Forest and Support Vector Machine classifiers on eight oil wells drilled into a fractured carbonite reservoir to study PLs with imbalanced and balanced datasets, then validated our results with image logs. A significant difference between accuracy and precision indicates imbalanced data with fractured zones categorized as the minor class. The results indicated that the accuracy of imbalanced and balanced datasets is similar, but precision is significantly improved by balancing, regardless of how low or high the calculated indices might be.Â Â
The protective action of ethanolic stem bark extract of Carissa edulis (VAHL) Apocynaceae against carbon tetrachloride Hepatotoxicity in rats
Authors: Y. Izam Y. , B. Bukar B. 
Published: October 2021

Background: Carissa edulis is generally used for the treatment of diverse ailments, but little or no interest has been shown on its hepatoprotective properties. This research work was aimed at evaluating the safety and claimed hepatoprotective activity of Carissa edulis.Method: For the intent of data collection, the method of Li et al., 2011 was used. In this method animals were treated with (250,500 and 1000mg/kg) of stem bark extract. The extract was given daily by gavage to the animals for 28 consecutive days. The 50% v/vCCl4 and olive oil was gavaged through gastric tube twice a week. The tests conducted were liver function test, liver antioxidant enzymes test, lipid profile test as well as Histopathological assessment of the liver sections.Results: Results of the study revealed that the markers in the animal treated with CCl4 were significantly higher than the normal control at (P<0.05). While blood samples from animals treated with the stem bark extracts were significantly lower than the CCl4 group at (P<0.05).Conclusion: These results imply that the ethanolic stem bark extract of Carissa edulis have a protective effect against CCl4 induced hepato - cellular injury.Â Â Â
Early Neurodevelopmental Anomalies in Young Rats from Adult female Treated with Valproic Acid
Authors: Martial Miguel Landry , Emmanuel Mboungou Malonga Archange , Gesril Njilo Tchatchouang Didier , LÃ©kana ChildÃ©rick , Ravelle Dobhat-Doukakini Choupette , Grace Nkounkou Matondo Emmanuel , Bertrand Bolanga Ruphin , Moukassa Donatien , Antoine Abena Ange 
Published: October 2021

Background: the influence of VPA on murine fertility, and on offspring is well documented: VPA decreases the fertility rate (by 25%) and the number of fÅ“tus. Furthermore, VPA causes behavioral alterations in rodents similar to the symptoms observed in autism.Objective: in this study we investigated the effects of exposure of non-pregnant adult rats to VPA in the offspring of these animals.Material and methods: non-pregnant adult rats were divided into 3 groups; (1) distilled water group, (2) VPA 200 mg / kg group and (3) VPA 400 mg/kg group. The products were administered orally daily for 30 days. At the end of treatments, all rats were put into monogamous mating with breeding males. The zootechnical characteristics (gestation period, litter size, mortality rate) were then noted. The young rats were then subjected to a battery of behavioral tests (reversal and anti-gravity reflexes, cliff avoidance, suspension, motor coordination and eye opening), carried out at different stages of life to assess sensorimotor development. Morphological abnormalities were also sought, as well as the mortality rate on the 28th day of life.Results: An increase in the mortality rate and a decrease in the mean lifespan were found in female rats exposed to VPA. Young rats from female rats exposed to VPA showed decreased success rates and performance in behavioral testing. Morphodevelopmental abnormalities such as adictalia or stump necrosis were found in the VPA groups. The offspring mortality rate of female rats exposed to VPA 200 mg/kg was 100%.Conclusion: VPA administered to non-pregnant adult rats causes developmental abnormalities, decreased success rates for performance testing, deformities and increased mortality in young rats from the treated rats by VPA.Â Â
Dutch Colonial Infrastructure Development in Takengon, 1904-1942
Authors: Iswanto Sufandi , Nurasiah Nurasiah , Kesuma T.  Bahagia 
Published: October 2021

The events of the Gayo-Alas War that occurred between the Gayo-Alas people against the Dutch colonial marked the end of the Aceh War. This bloody conflict also marked the Gayo Plateau region, especially Takengon, which was occupied by the Dutch colonial authorities. Since then, Takengon, which was originally just an inland region of Aceh, has begun to grow, especially its infrastructure. Therefore, this study aims to examine the infrastructure that was built in the colonial era (1904-1942). The method used in this study is the historical method, which consisted of five analytical stages, namely topic selection, heuristics, leverage, interpretation, and historiography. The results of the study show that since the Dutch colonial came to the Gayo Takengon Plateau in 1904, Takengon was more developed comparing to previous period, all of which was inseparable from infrastructure development by the Dutch colonial. Some of the infrastructures were built successfully, there were the main road between Bireuen and Takengon, central government, Dutch and Tionghoa society, market, and Dutch school. The development of infrastructure also has had an impact for Takengon's area, such as the new society along Bireuen-Takengon highway, and the construction of Takengon-Gayo Lues' road. In addition, the opening of the road was aimed at opening the Dutch plantations and the private sector has made the emergence of the society's settlements, like in Redelong, Pondok Baru (Janarata), Lampahan and Isaq.
Napa
Authors: Agiwal Ankur , Lai Kevin , Manoharan Gokul Nath Babu , Roy Indrajit , Sankaranarayanan Jagan , Zhang Hao , Zou Tao , Chen Min , Chen Zongchang (Jim) , Dai Ming , Do Thanh , Gao Haoyu , Geng Haoyan , Grover Raman , Huang Bo , Huang Yanlai , Li Zhi (Adam) , Liang Jianyi , Lin Tao , Liu Li , Liu Yao , Mao Xi , Meng Yalan (Maya) , Mishra Prashant , Patel Jay , R. Rajesh S. , Raman Vijayshankar , Roy Sourashis , Shishodia Mayank Singh , Sun Tianhang , Tang Ye (Justin) , Tatemura Junichi , Trehan Sagar , Vadali Ramkumar , Venkatasubramanian Prasanna , Zhang Gensheng , Zhang Kefei , Zhang Yupu , Zhuang Zeleng , Graefe Goetz , Agrawal Divyakant , Naughton Jeff , Kosalge Sujata , Hacıgümüş Hakan 
Published: October 2021

Google services continuously generate vast amounts of application data. This data provides valuable insights to business users. We need to store and serve these planet-scale data sets under the extremely demanding requirements of scalability, sub-second query response times, availability, and strong consistency; all this while ingesting a massive stream of updates from applications used around the globe. We have developed and deployed in production an analytical data management system, Napa, to meet these requirements. Napa is the backend for numerous clients in Google. These clients have a strong expectation of variance-free, robust query performance. At its core, Napa's principal technologies for robust query performance include the aggressive use of materialized views, which are maintained consistently as new data is ingested across multiple data centers. Our clients also demand flexibility in being able to adjust their query performance, data freshness, and costs to suit their unique needs. Robust query processing and flexible configuration of client databases are the hallmark of Napa design.
Most of the related work in this area takes advantage of full flexibility to design the whole system without the need to support a diverse set of preexisting use cases. In comparison, a particular challenge we faced is that Napa needs to deal with hard constraints from existing applications and infrastructure, so we could not do a "green field" system, but rather had to satisfy existing constraints. These constraints led us to make particular design decisions and also devise new techniques to meet the challenges. In this paper, we share our experiences in designing, implementing, deploying, and running Napa in production with some of Google's most demanding applications.
On the limits of machine knowledge
Authors: Razniewski Simon , Arnaout Hiba , Ghosh Shrestha , Suchanek Fabian 
Published: October 2021

General-purpose knowledge bases (KBs) are an important component of several data-driven applications. Pragmatically constructed from available web sources, these KBs are far from complete, which poses a set of challenges in curation as well as consumption.
In this tutorial we discuss how completeness, recall and negation in DBs and KBs can be represented, extracted, and inferred. We proceed in 5 parts: (i) We introduce the logical foundations of knowledge representation and querying under partial closed-world semantics. (ii) We show how information about recall can be identified in KBs and in text, and (iii) how it can be estimated via statistical patterns. (iv) We show how interesting negative statements can be identified, and (v) how recall can be targeted in a comparative notion.
Machine learning for cloud data systems
Authors: Jindal Alekh , Interlandi Matteo 
Published: October 2021

The goal of this tutorial is to educate the audience about the state of the art in ML for cloud data systems, both in research and in practice. The tutorial is divided in two parts: the progress, and the path forward.
Part I covers the recent successes in deploying machine learning solutions for cloud data systems. We will discuss the practical considerations taken into account and the progress made at various levels. The goal is to compare and contrast the promise of ML for systems with the ground actually covered in industry.
Finally, Part II discusses practical issues of machine learning in the enterprise covering the generation of explanations, model debugging, model deployment, model management, constraints on eyes-on data usage and anonymization, and a discussion of the technical debt that can accrue through machine learning and models in the enterprise.
Alchemical lexica in Syriac: planetary signs, code names and medicines
Authors: Martelli Matteo 
Published: October 2021

Abstract
Technical terminology and Decknamen represent key hallmarks of the alchemical literature in different traditions. The opacity of this vocabulary makes the reading of alchemical texts difficult and, in order to cope with similar challenges, Byzantine, Syriac and Arabic scholars soon started compiling technical vocabularies. In my paper I shall investigate two (partially overlapping) lexica, which open the BL Syriac alchemical MSS Egerton 709 and Oriental 1593. On the one hand, I will explore the variety of sources used by the anonymous compiler(s) to assemble these useful tools (Byzantine alchemists as well as the Greek medical tradition; Syro-Arabic lexicography). On the other, particular attention will be given to the structure and mise en page of the two lexica, which will be compared with analogous alchemical dictionaries in the Byzantine (e.g. MS Marcianus gr. 299) and Arabic (e.g. MS Gotha 1261) traditions.
The role of anticorrosive polymer coatings for the protection of metallic surface
Authors: Boga Karteek , Pothu Ramyakrishna , Arukula Ravi , Boddula Rajender , Gaddam Sashivinay Kumar 
Published: October 2021

Abstract
Research on corrosion-resistant polymer coatings has attracted scientists in both academia and industry to prevent corrosion-related damage in modern industrial equipment and to extend the working life of industrial metallic surfaces. To achieve realistic applications, diverse methodologies have been designed to magnify the anticorrosion efficiency of these coatings. The current review describes the conventional and advanced methods utilized for the synthesis of corrosion-resistant polymer coatings. The main intent of this review article is to provide an overview of the design and preparation of anticorrosive polymer coatings with important examples. The promising anticorrosion applications of self-healing polymer coatings for metallic materials and alloys are highlighted. The advantage of a superhydrophobic surface to prevent the corrosion of the materials is discussed. A brief discussion over the anticorrosion mechanism of conducting polymer coatings is also provided. Finally, the current challenges and future perspectives to prolong the anticorrosion performance of these coatings are also addressed.
Infinitely many solutions for nonlocal elliptic systems in Orlicz–Sobolev spaces
Authors: Heidari Samira , Razani Abdolrahman 
Published: October 2021

Abstract
Recently, the existence of at least two weak solutions for a Kirchhoff–type problem has been studied in [M. Makvand Chaharlang and A. Razani,
Two weak solutions for some Kirchhoff-type problem with Neumann boundary condition,
Georgian Math. J. 28 2021, 3, 429–438]. Here, the existence of infinitely many solutions for nonlocal Kirchhoff-type systems including Dirichlet boundary conditions in Orlicz–Sobolev spaces is studied by using variational methods and critical point theory.
Dealing with Not-Knowing in Inbound Open Innovation: A High-Tech Innovation Case
Authors: Tauraitė-Kavai Erika 
Published: October 2021

AbstractKnowledge and innovation are two inseparable topics in the literature on knowledge management or innovation. Most often, when scholars write about knowledge management, they refer to innovation as the key objective. Some argue that using the knowledge available beyond a firm’s boundaries (open innovation) leads to increased innovativeness, while others talk of the knowledge-creating firm. However, current literature provides us with limited insights on how the innovation team deals with externally developed knowledge or how it comes into the innovation creation process. Managing teamwork innovation endeavours in technology development is challenging since the outcome is often uncertain as well as inputs along that path. This paper attempts to open the backbox of open innovation and suggests that innovating teams entwine externally developed knowledge through the process of dealing with not-knowing.
Stoichiometric modulation on optical nonlinearity of 2D MoS
x
Se2−x
alloys for photonic applications
Authors: Sun Xiaoli , Wang Yuanyuan , Yan Bingzheng , Yang Kejian , Wei Wei , Dai Ying , Chen Feng , Zhang Baitao , He Jingliang 
Published: October 2021

Abstract
The composition-engineered band structures of two-dimensional (2D) ternary transition-metal dichalcogenides (TMDCs) semiconductor alloys directly dominate their electronic and optical properties. Herein, in this paper, a detailed theoretical and experimental study on the composition-dependent nonlinear optical properties of 2D MoS
x
Se2−x
alloys was carried out. The first-principles calculations were performed to investigate the compositionally modulated properties of monolayer 2D MoS
x
Se2−x
(x = 0.25, 0.5, 1.0, 1.5, and 1.75) in terms of the carrier effective mass, carrier density and mobility, as well as band-gaps. Furthermore, high-quality few-layered MoS
x
Se2−x
(x = 0.2, 0.5, 1.0, 1.5, and 1.8) nanosheets were fabricated by using liquid phase exfoliation method. The third-order nonlinear optical response was investigated by open-aperture Z-scan technique, revealing composition-dependent saturable absorption, and light modulation properties, which were correlated to the theoretical calculations and further confirmed by using MoS
x
Se2−x
nanosheets as saturable absorbers (SAs) for all-solid-state pulsed lasers. In particular, a mode-locked solid-state laser with pulse width of 227 fs was realized with MoS0.2Se1.8 as SA, for the first time to our best knowledge. Our work not only provides a comprehensive understanding of the compositionally and defectively modulated nonlinear optical responses of ternary TMDCs alloys, but also paves a way for the development of 2D materials-based novel optoelectronic devices.
Austerity Effects on National Output and Income Inequality: A Systematic Literature Review
Authors: Okeke Angela , Alexiou Constantinos , Nellis Joseph 
Published: October 2021

Abstract
Fiscal sustainability issues over rising national debt concerns and the consequent expansionary fiscal retrenchment hypothesis has fuelled the contentious austerity vis-à-vis stimulus debate which has spawned a large empirical literature of conflicting findings on the economic effects of austerity – with particular emphasis revolving around equity and distributional issues. In this paper we attempt to summarise the growing literature on the recent developments regarding the theoretical as well as empirical approaches on national output and distributional aspects of austerity. By exploring the existing evidence in the literature on the effect of consolidation programs, we offer a more holistic overview of the subject matter through a synthesis of the extant literature and, by so doing, propose directions for future research pertinent to both academic researchers and policymakers.
Chiral bis(pyrazolyl)methane copper(I) complexes and their application in nitrene transfer reactions
Authors: Thomas Fabian , Steden Dominik , Eith Alexander , Hoffmann Alexander , Herres-Pawlis Sonja 
Published: October 2021

Abstract
In this study, chiral bis(pyrazolyl)methane copper(I) acetonitrile complexes were applied to generate two novel terminal copper tosyl nitrene complexes with the nitrene generating agent SPhINTs in dichloromethane at low temperatures. The syntheses of the chiral bis(pyrazolyl)methane ligands are based on pulegone and camphor, members of the natural chiral pool. The chiral copper(I) acetonitrile complexes were applied as catalysts in the copper nitrene mediated aziridination reaction of different styrene derivatives and the C–H amination of various substrates. The reactions afforded good yields, but low enantiomeric excess under mild conditions. The nitrene species have been characterized with UV/Vis and EPR spectroscopy and the products of the decay by ESI mass spectrometry.
Análisis de evolución de la asistencia técnica y el fomento de cooperativas rurales en Colombia
Authors: Vargas Prieto Amanda , Sánchez Álvarez César 
Published: October 2021

En la búsqueda de formalización de la economía y el ordenamiento territorial rural el legislador colombiano dio forma a las Zonas de Interés de Desarrollo Rural, Económico y Social (Zidres). Estas zonas son territorios de vocación agropecuaria que serán aprobados a partir de proyectos productivos individuales o asociativos. Según el artículo 1 de la Ley 1776 de 2016, la asistencia técnica será realizada por entidades encargadas desde un enfoque integral en el ciclo de los proyectos, garantizando la provisión de los paquetes tecnológicos, fomento de formas empresariales y servicios sociales básicos para el desarrollo rural. A través de una metodología cualitativa de análisis heurístico e histórico se identifican dos fases de un análisis en retrospectiva de un siglo de historia en la evolución de las instituciones que han promovido y fomentado la asistencia técnica en diferentes organizaciones y en el caso particular de las cooperativas agrarias. Los momentos identificados se corresponden a momentos históricos que han condicionado la formulación de las políticas públicas.