bluuebunny/crossref_metadata_2025_split huggingface dataset:
Estimated Power Output from a Simplified Pico Hydropower System
Authors: Okibe Edeoja Alex , Sunday Ibrahim Joshua , Ochonu Lawrence 
Published: March 2019

Based on the results of no-load tests carried out on a simplified Pico hydropower system currently undergoing development, on-load tests were carried out. A turbine of runner diameter 0.40 m, penstock diameters in the range and nozzle area ratios in the range were used for the on-load tests. A 2.5 kW alternator was linked to the turbine using a v-belt drive on pulleys of ratio 6:1. The effective vertical height from the outlet of the reservoir to the plane of the turbine shaft was 6.95 m. A 0.74 kW electric pump was used to recycle the water to the overhead reservoir. The rotational speeds of the turbine and alternator shafts, the volume of water displaced and voltage were measured for each penstock diameter and nozzle area ratio. The measured data were used to compute the system volumetric flow rate and to estimate the power output based on the alternator manufacturer’s specifications. The turbine efficiency was also computed. The system developed a maximum voltage of 224 V with and a minimum voltage of 111 V with and . The corresponding estimated power outputs were 2.125 kW and 1.545 kW respectively. The mean maximum and minimum efficiencies based on the estimated power output were 0.85 and 0.618 respectively. The overall results indicate very good potential for the system as a clean, decentralized small power generation unit that gives control to the user.
The Use of Fuzzy Logic Model to Investigate the Effect of Weather Parameter Impact on Electrical Load Based on Short Term Forecasting: Further Study
Authors: Ali Danladi , Vasira G. P. 
Published: March 2019

Electrical load forecasting is very important for effective planning and management of power system. Accurate load forecasting helps the electrical power company to make some decisions on how to meet up with their consumers’ demand. This paper presents a solution methodology using fuzzy logic approach for short term load forecasting (SLTF) for Adamawa State University. The proposed method used fuzzy reasoning decision rules that utilized the nonlinear relationship between inputs and output. The model developed was able to forecast the future load with mean absolute percentage error (MAPE) of 1.36% and forecasting without previous load at the input of the fuzzy logic model yields better prediction error. However, from the result obtained, it shows temperature has a significant impact on electrical load than the relative humidity. Also, electrical load shall increase by 1.84 kW on the 25th September, 2018 due to increase in temperature.
A Spatial Analysis of Political Participation in Telangana State, India
Authors: Virugu Karunakar , Lonavath Ashok Kumar 
Published: March 2019

Telangana state is a newly formed state in India. It is the 29th state and was formed on 2nd June, 2014. It was part of erstwhile Andhra Pradesh state. The lack of political participation from the Telangana regions in state of Andhra Pradesh was the major cause for demanding separate state hood for Telangana. The Geopolitical analysis expresses that the heads of the political parties and governing portfolios was only from Rayalaseema and Andhra region. The regional disparities were one of the major causes of discrimination among the regions. It is worthwhile to mention the political dynamics within Telangana and give the scenario of political participation among different regions of Telangana. The study of Zilla Parishad elections (ZP) is a micro-level political participation of people in Telangana as with Panchayat Raj elections in different states of India.
Geographical Information System (GIS) was employed to analyse the spatial patterns of Geopolitical participation of people in ZP elections.
Panchayat Raj elections were held 4 times in Telangana, when it was part of erstwhile Andhra Pradesh. The research paper analyse the political dynamics of Panchayat Raj as democracy of ZPTC’s. There are 443 ZPTC’s in Telangana and the three major political parties like Indian National Congress (INC), Telugu Desam Party (TDP) and Telangana Rastra Samiti (TRS) plays the significant role in the Geo-politics of Telangana.
Heavy Heparin: A Stable Isotope‐Enriched, Chemoenzymatically‐Synthesized, Poly‐Component Drug
Authors: Cress Brady F. , Bhaskar Ujjwal , Vaidyanathan Deepika , Williams Asher , Cai Chao , Liu Xinyue , Fu Li , M‐Chari Vandhana , Zhang Fuming , Mousa Shaker A. , Dordick Jonathan S. , Koffas Mattheos A. G. , Linhardt Robert J. 
Published: March 2019

AbstractHeparin is a highly sulfated, complex polysaccharide and widely used anticoagulant pharmaceutical. In this work, we chemoenzymatically synthesized perdeuteroheparin from biosynthetically enriched heparosan precursor obtained from microbial culture in deuterated medium. Chemical de‐N‐acetylation, chemical N‐sulfation, enzymatic epimerization, and enzymatic sulfation with recombinant heparin biosynthetic enzymes afforded perdeuteroheparin comparable to pharmaceutical heparin. A series of applications for heavy heparin and its heavy biosynthetic intermediates are demonstrated, including generation of stable isotope labeled disaccharide standards, development of a non‐radioactive NMR assay for glucuronosyl‐C5‐epimerase, and background‐free quantification of in vivo half‐life following administration to rabbits. We anticipate that this approach can be extended to produce other isotope‐enriched glycosaminoglycans.
Supermacroporous polydivinylbenzene cryogels with high surface area: Synthesis by solvothermal postcrosslinking and their adsorption behaviors for carbon dioxide and aniline
Authors: Guo Fenghao , Wang Yinping , Chen Xilu , Chen Mingqian , He Wei , Chen Zhiyong 
Published: March 2019

ABSTRACTCryogels are supermacroporous but restricted by lack of surface area in utilization to date. We here propose a method for fabrication of supermacroporous polydivinylbenzene (PDVB) cryogels with high surface area by redox‐initiated cryopolymerization combined with solvothermal postcrosslinking technique. The PDVB precursor cryogels are prepared by redox‐initiated cryopolymerization, followed by postcrosslinking of residual double bonds to form hypercrosslinked cryogels under solvothermal conditions. The hypercrosslinked cryogels maintain the original supermacroporosity and display very high surface area up to 1462 m2 g−1. We demonstrate the utilization of the resultant cryogel in uptake of carbon dioxide (7.9 wt % at 1 bar and 62.2 wt % at 25 bar, respectively) and uptake of aniline (333.3 mg g−1 at room temperature) from aqueous solutions. The adsorption behaviors of aniline on the hypercrosslinked cryogels are found to follow Langmuir model as well as Freundlich model in equilibrium adsorption and to follow pseudo‐second‐order model in kinetic adsorption, respectively. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47716.
Orange to green switching anthraquinone‐based electrochromic material
Authors: Bini Kim , Gedefaw Desta , Pan Caroline , Bjuggren Jonas M. , Sharma Anirudh , Wang Ergang , Andersson Mats R. 
Published: March 2019

ABSTRACTAn easily accessible anthraquinone‐benzodithiophene‐based high bandgap polymer (PTAq) was synthesized by Stille coupling reactions in remarkably high yield (96.5%). The highest occupied molecular orbital energy level of the polymer was estimated from the onset of oxidation in a cyclic voltammetry study to be −5.7 eV. PTAq showed an orange‐to‐green color switching with the application of a 1.0‐V external potential to the polymer film, which was visible to the naked eye. The optical behavior change was also monitored using ultraviolet–visible absorption spectroscopy and revealed a respectable 75% transmittance change when the polymer film was subjected to a 1.0‐V external potential. The high color contrast observed makes PTAq one of the most promising materials for electrochromic device applications. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47729.
Residential virtual power plant with photovoltaic output forecasting and demand response
Authors: Cui Shichang , Wang Yan‐Wu , Lin Xiangning , Xiao Jiang‐Wen 
Published: March 2019

AbstractDecreasing conventional power supply is promoting the development of the distributed renewable energy sources, such as solar power and wind power. Recently rooftop photovoltaic has been widely applied, and accordingly efficient energy management is getting increasingly important for fully use of renewable energy and the peak shaving of the main grid. This paper investigates the residential energy management as a small‐scale virtual power plant (VPP) connected to the main grid includes distributed energy resources, energy storages and residential loads. The self‐organizing map (SOM) and the radical basis function (RBF) networks are adopted to classify the weather types and predict hourly photovoltaic output precisely. In a time‐of‐use electricity market, price‐based demand response is applied to adjust the demand. The residential VPP has two goals: maximum profit by selling surplus power to grid and minimum power purchased from grid. The two goals are integrated as an optimization object by introducing a weight parameter. The algorithm combining receding horizon optimization and linear programming is proposed to solve the optimization problem in residential VPP. Numerical simulation tests can help to find the most suitable value of the weight parameter. Different scenarios are simulated and discussed to demonstrate the performance of the VPP and the proposed algorithm.
Multiple imputation for discrete data: Evaluation of the joint latent normal model
Authors: Quartagno Matteo , Carpenter James R. 
Published: March 2019

AbstractMissing data are ubiquitous in clinical and social research, and multiple imputation (MI) is increasingly the methodology of choice for practitioners. Two principal strategies for imputation have been proposed in the literature: joint modelling multiple imputation (JM‐MI) and full conditional specification multiple imputation (FCS‐MI). While JM‐MI is arguably a preferable approach, because it involves specification of an explicit imputation model, FCS‐MI is pragmatically appealing, because of its flexibility in handling different types of variables. JM‐MI has developed from the multivariate normal model, and latent normal variables have been proposed as a natural way to extend this model to handle categorical variables. In this article, we evaluate the latent normal model through an extensive simulation study and an application on data from the German Breast Cancer Study Group, comparing the results with FCS‐MI. We divide our investigation in four sections, focusing on (i) binary, (ii) categorical, (iii) ordinal, and (iv) count data. Using data simulated from both the latent normal model and the general location model, we find that in all but one extreme general location model setting JM‐MI works very well, and sometimes outperforms FCS‐MI. We conclude the latent normal model, implemented in the R package jomo, can be used with confidence by researchers, both for single and multilevel multiple imputation.
Diversity in Fungal Intermolecular Phenol Coupling of Polyketides: Regioselective Laccase‐Based Systems
Authors: Fürtges Leon , Obermaier Sebastian , Thiele Wiebke , Foegen Silke , Müller Michael 
Published: March 2019

AbstractPolyketides form a structurally diverse and pharmaceutically important class of secondary metabolites. Both diversity and biological activity are largely facilitated by post‐polyketide synthase tailoring including methylation, oxidation, reduction, glycosylation, and dimerization. Cytochrome P450 enzymes (CYPs), flavin‐dependent monooxygenases (FMOs), and laccases are known to catalyze phenol coupling in the biosynthesis of polyketide dimers. Polyketide homodimers resulting from enzyme catalysis are often formed in a highly regio‐ and stereoselective manner, in contrast to analogous nonenzymatic dimerization. Although it is known that CYPs and FMOs are capable of selectively generating one of several putative isomers, hitherto described laccases depend on auxiliary proteins to achieve similar selectivity. Herein, regioselective phenol coupling catalyzed by a fungal laccase is demonstrated. The heterologously produced Av‐VirL from Aspergillus viridinutans selectively generated the 6,6′‐homodimer of (R)‐semivioxanthin. Genome analysis is used to show that laccase‐based phenol‐coupling systems are widespread in fungi. Homologues of Av‐VirL were identified in the putative biosynthetic gene clusters of vioxanthin, xanthomegnin, and xanthoepocin, and of the perylenequinones hypocrellin A, elsinochrome A, and cercosporin. These findings show that laccases are capable of selective phenol coupling in the absence of auxiliary proteins.
Apical hypertrophic cardiomyopathy with preexcitation presenting as a myocardial infarction and ischemic stroke with a history of recurrent syncope: A case report
Authors: Al‐Saadi Jonathan , Mattsson Gustav , Kader Rozh , Magnusson Peter 
Published: March 2019

Key Clinical MessageContrast‐enhanced echocardiography or cardiac magnetic resonance imaging is of value in the diagnosis of apical hypertrophic cardiomyopathy. Apical hypertrophic cardiomyopathy is rare in Caucasians, and gene negativity does not rule out the diagnosis. Risk stratification for sudden cardiac death and decisions about anticoagulation in cases with atrial fibrillation should be based on guidelines.
Comparison of different excitation‐ and data sampling‐methods in structural health monitoring
Authors: Maas Stefan , Nguyen Viet Ha , Kebig Tanja , Schommer Sebastian , Zürbes Arno 
Published: March 2019

AbstractStructural Health Monitoring with analysis of dynamic characteristics intends to detect stiffness changes caused by damage. It can be performed by vibrational tests resulting to modal parameters, that is, eigenfrequencies, damping, modeshapes, or modal masses. Those parameters are themselves informational and even allow often deducing the stiffness matrix. Based on that, it is possible to identify and to localize changes in the stiffness matrix due to damage, that is, localization and quantification of damage. However, changing test conditions, like ambient temperature or excitation force or existing nonlinearities of concrete, show important influence on damage indicators and hence need compensation prior to damage detection. Considering this background, this article focuses on comparing ambient excitation to forced excitation including appropriate exciters. Furthermore, continuous monitoring is discussed vs discrete testing in distinct time‐intervals. The intention of the comparison is to give an overview, that is, helpful for choosing appropriate measurement technique for the sake of correct damage detection subsequently.
Potential Precursor Alternatives to the Pyrophoric Trimethylaluminium for the Atomic Layer Deposition of Aluminium Oxide
Authors: Mai Lukas , Boysen Nils , Zanders David , de los Arcos Teresa , Mitschker Felix , Mallick Bert , Grundmeier Guido , Awakowicz Peter , Devi Anjana 
Published: March 2019

AbstractNew precursor chemistries for the atomic layer deposition (ALD) of aluminium oxide are reported as potential alternatives to the pyrophoric trimethylaluminium (TMA) which is to date a widely used Al precursor. Combining the high reactivity of aluminium alkyls employing the 3‐(dimethylamino)propyl (DMP) ligand with thermally stable amide ligands yielded three new heteroleptic, non‐pyrophoric compounds [Al(NMe2)2(DMP)] (2), [Al(NEt2)2(DMP)] (3, BDEADA) and [Al(NiPr2)2(DMP)] (4), which combine the properties of both ligand systems. The compounds were synthesized and thoroughly chemically characterized, showing the intramolecular stabilization of the DMP ligand as well as only reactive Al−C and Al−N bonds, which are the key factors for the thermal stability accompanied by a sufficient reactivity, both being crucial for ALD precursors. Upon rational variation of the amide alkyl chains, tunable and high evaporation rates accompanied by thermal stability were found, as revealed by thermal evaluation. In addition, a new and promising plasma enhanced (PE)ALD process using BDEADA and oxygen plasma in a wide temperature range from 60 to 220 °C is reported and compared to that of a modified variation of the TMA, namely [AlMe2(DMP)] (DMAD). The resulting Al2O3 layers are of high density, smooth, uniform, and of high purity. The applicability of the Al2O3 films as effective gas barrier layers (GBLs) was successfully demonstrated, considering that coating on polyethylene terephthalate (PET) substrates yielded very good oxygen transmission rates (OTR) with an improvement factor of 86 for a 15 nm film by using DMAD and a factor of 25 for a film thickness of just 5 nm by using BDEDA compared to bare PET substrates. All these film attributes are of the same quality as those obtained for the industrial precursor TMA, rendering the new precursors safe and potential alternatives to TMA.
Rapid Deoxyfluorination of Alcohols with N‐Tosyl‐4‐chlorobenzenesulfonimidoyl Fluoride (SulfoxFluor) at Room Temperature
Authors: Guo Junkai , Kuang Cuiwen , Rong Jian , Li Lingchun , Ni Chuanfa , Hu Jinbo 
Published: March 2019

AbstractThe deoxyfluorination of alcohols is a fundamentally important approach to access alkyl fluorides, and thus the development of shelf‐stable, easy‐to‐handle, fluorine‐economical, and highly selective deoxyfluorination reagents is highly desired. This work describes the development of a crystalline compound, N‐tosyl‐4‐chlorobenzenesulfonimidoyl fluoride (SulfoxFluor), as a novel deoxyfluorination reagent that possesses all of the aforementioned merits, which is rare in the arena of deoxyfluorination. Endowed by the multi‐dimensional modulating ability of the sulfonimidoyl group, SulfoxFluor is superior to 2‐pyridinesulfonyl fluoride (PyFluor) in fluorination rate, and is also superior to perfluorobutanesulfonyl fluoride (PBSF) in fluorine‐economy. Its reaction with alcohols not only tolerates a wide range of functionalities including the more sterically hindered alcoholic hydroxyl groups, but also exhibits high fluorination/elimination selectivity. Because SulfoxFluor can be easily prepared from inexpensive materials and can be safely handled without special techniques, it promises to serve as a practical deoxyfluorination reagent for the synthesis of various alkyl fluorides.
Intrusion detection system based on GA‐fuzzy classifier for detecting malicious attacks
Authors: Pradeep Mohan Kumar K. , Saravanan M. , Thenmozhi M. , Vijayakumar K. 
Published: March 2019

SummaryUsage of computer resources, being a very important part in day to day life, it is to be noticed that the security threats have also increased. Hence, Intrusion Detection System (IDS) is used for detection and prevention of computer resources from security threats generated by malicious attackers. Existing techniques like encryption mechanism, authentication mechanism, and access control do not support for analyzing large volume of data and it is efficient only in the case of limited number of attacks. Attackers attack the computer resources based on the weakness of the security level in the Information system and they can violate the rules and regulation of computer system (Confidentiality, Integrity, and Availability) easily. Handling threats on computer resources still remains a challenging issue. Distributed Denial of Service attacks (DDoS) is an important attack that sends more than one number of requests to the destination server from multiple compromised systems that makes the Information system unable to process the request thereby resulting in non‐response to the attacker as well as normal end user, which results in large number of false alarms and less detection accuracy rates. We propose a new model called hybrid‐based intrusion detection system (GA‐Fuzzy) for handling large volume NSL‐KDD Dataset for detecting attacks effectively and for reducing misclassification alarm rate. Here, Genetic algorithm (GA) is used for creating new pattern (new features, records) for training the Fuzzy classifier effectively. We use Principle Component Analysis (PCA) as a feature selection method that eliminates irrelevant and redundant data from the NSL‐KDD dataset that improves the efficiency and to attain 99.96% detection accuracy and 0.04% false alarm rate.
Secure‐aware and privacy‐preserving electronic health record searching in cloud environment
Authors: Wang Xiao , Zhang Aiqing , Xie Xiaojuan , Ye Xinrong 
Published: March 2019

SummaryCloud storage has become a trend of storage in modern age. The cloud‐based electronic health record (EHR) system has brought great convenience for health care. When a user visits a doctor for a treatment, the doctor may be necessary to access the history health records generated at other medical institutions. Thus, we present a secure EHR searching scheme based on conjunctive keyword search with proxy re‐encryption to realize data sharing between different medical institutions. Firstly, we propose a framework for health data sharing among multiple medical institutions based on cloud storage. We explore the public key encryption with conjunctive keyword search to encrypt the original data and store it in the cloud. It ensures data security with searchability. Furthermore, we adopt the identity‐based access control mechanism and proxy re‐encryption scheme to guarantee the legitimacy of access and the privacy of the original data. Generally speaking, our work can achieve authentication, keyword privacy, and privacy preservation. Moreover, the performance evaluation shows that the scheme can achieve high computational efficiency.
Mandibular reconstruction with the scapula tip free flap
Authors: Blumberg Jeffrey M. , Walker Paul , Johnson Stephanie , Johnson Bradley , Yu Eugene , Lacasse Marie‐Constance , Lam David K. , Rittenberg Brian , Yao Christopher M.K.L. , Chepeha Douglas , de Almeida John R. , Goldstein David P. , Gilbert Ralph 
Published: March 2019

AbstractIntroductionThe scapula tip free flap has been described for reconstruction of short mandible defects with extensive soft tissue needs. The versatility of this flap has not been extensively described.MethodsRetrospective case series of patients who underwent mandibulectomy and reconstruction with the scapula tip free flap from 2005 to 2016. Outcomes include bony union, complications, dental rehabilitation, and donor site morbidity.ResultsA total of 120 patients were identified. Average harvested bone was 7.7 cm, with 54% undergoing one osteotomy, and 76.7% harvested as a chimeric flap. Radiographically, average inset bone was 6.6 cm. Complete or partial bony union was observed at 74.4% of proximal and 82.6% of distal osteotomies. A 95% of reconstructions met criteria for dental implants. Mean disabilities of the arm, shoulder and hand score was 21.2.ConclusionsThe scapular tip is an excellent option for reconstruction of segmental mandible defects with the option of osteotomy, excellent bony union rates, low donor site morbidity, and potential for dental rehabilitation.