bluuebunny/crossref_metadata_2025 huggingface dataset:
Nanocrystals of CuMSnS4 (M = In or Ga) for solar energy conversion applications
Authors: Ramasamy Karthik , Shinde Pravin S. , Naghibolashrafi Nariman , Pan Shanlin , Gupta Arunava
Published: September 2018

Nanocrystals of wurtzite and defect chalcopyrite phases of CuMSnS4 (M = In or Ga) have been synthesized that exhibit strong visible light absoprtion with a band gap between 1.15 and 1.40 eV.
Benzoins and cyclobenzoins in supramolecular and polymer chemistry
Authors: Alrayyani Maymounah , Miljanić Ognjen Š.
Published: September 2018

Benzoin condensation is one of the oldest rigorously described organic reactions, having been discovered in 1832 by Liebig and Wöhler. This Feature Article summarizes our work on cyclobenzoins: a class of macrocyclic compounds prepared by a benzoin cyclooligomerization of simple aromatic dialdehydes.
Systematic analysis of electron energy-loss near-edge structures in Li-ion battery materials
Authors: Saitoh Motofumi , Gao Xiang , Ogawa Takafumi , Ikuhara Yumi H. , Kobayashi Shunsuke , Fisher Craig A. J. , Kuwabara Akihide , Ikuhara Yuichi
Published: September 2018

Electron energy-loss near-edge structures of O-K edges of LiCoO2 and LiFePO4 with bonding states assigned by DFT analysis.
Electrolyte solvents for high voltage lithium ion batteries: ion correlation and specific anion effects in adiponitrile
Authors: Narayanan Kirshnamoorthy Anand , Oldiges Kristina , Winter Martin , Heuer Andreas , Cekic-Laskovic Isidora , Holm Christian , Smiatek Jens
Published: September 2018

Combined atomistic molecular dynamics, quantum chemical, and experimental study regarding the properties of two lithium conducting salts in high voltage electrolyte solvent adiponitrile.
Stabilization of two-dimensional penta-silicene for flexible lithium-ion battery anodes via surface chemistry reconfiguration
Authors: Wu Donghai , Wang Shuaiwei , Zhang Shouren , Liu Yibiao , Ding Yingchun , Yang Baocheng , Chen Houyang
Published: September 2018

Surface chemistry reconfiguration is employed to acquire stable penta-silicene with tunable properties for use in flexible lithium-ion battery anodes.
“Chemistry-on-the-complex”: functional RuIIpolypyridyl-type sensitizers as divergent building blocks
Authors: Mede Tina , Jäger Michael , Schubert Ulrich S.
Published: September 2018

Ruthenium polypyridyl type complexes are potent photoactive compounds, and have found – among others – a broad range of important applications in the fields of biomedical diagnosis and phototherapy, energy conversion schemes such as dye-sensitized solar cells (DSSCs) and molecular assemblies for tailored photo-initiated processes.
Solvatochromism, acidochromism and aggregation-induced emission of propeller-shaped spiroborates
Authors: Li Kang , Cui Jichun , Yang Zeren , Huo Yanmin , Duan Wenzeng , Gong Shuwen , Liu Zhipeng
Published: September 2018

Propeller-shaped pyridyl-enolato-catecholate/-salicyl spiroborates (Sborepy1–6) were synthesized.
Digital microfluidics using a differentially polarized interface (DPI) to enhance translational force
Authors: Razu Md Enayet , Kim Jungkyu
Published: September 2018

A low-voltage and differentially polarized digital microfluidic platform is developed by enhancing the electromechanical force for droplet translation.
Discovery of potent pyruvate dehydrogenase kinase inhibitors and evaluation of their anti-lung cancer activity under hypoxia
Authors: Yang Ronghua , Guo Caihong
Published: September 2018

Targeting pyruvate dehydrogenase kinases (PDKs) reverses the Warburg effect, which could be a potential therapeutic target for anti-cancer drug discovery.
Photoluminescence manipulation of WS2 flakes by an individual Si nanoparticle
Authors: Ma Churong , Yan Jiahao , Huang Yingcong , Yang Guowei
Published: September 2018

The photoluminescence of WS2 flakes can be manipulated by an individual Si nanoparticle.
Characterization and study of luminescence enhancement behaviour of alginate-based hydrogels
Authors: Kang Mengmeng , Oderinde Olayinka , Deng Yaoyao , Liu Shunli , Yao Fang , Fu Guodong
Published: September 2018

Luminescence enhanced composites were fabricated via introducing 5-sulfosalicylic acid molecules into a Tb(iii)-based system to avoid being quenched by water.
Fabrication of a self-assembled supramolecular fluorescent nanosensor from functional graphene oxide and its application for the detection of Al3+
Authors: Liu Zengchen , Yang Weijie , Tian Boshi , Liu Jin , Zhu Wenping , Ge Genwu , Xiao Lina , Meng Yuning
Published: September 2018

In this work, we present an excellent water-soluble supramolecular self-assembled fluorescent nanosensor toward Al3+based on graphene oxide and a β-cyclodextrin derivative.
An easy preparation of photo-response TiO2@copper wire mesh with quick on/off switchable superwetting for high efficiency oil–water separation
Authors: Shi Bing , Jia Xiaohua , Guo Zhiguang
Published: September 2018

A photo-response superwetting was easily fabricated using a hydrothermal method and titanium dioxide (TiO2) on a copper wire mesh (CWM).
Evolution of 3D nanoporosity and morphology in selectively dealloying ternary Au55Cu25Si20 metallic glass ribbon with enhanced alcohol electro-oxidation performance
Authors: Xu Yi , Cheng Junye , Yiu Pak Man , Shan Guangcun , Shibayama Tamaki , Watanabe Seiichi , Ohnuma Masato , Shek Chan-Hung
Published: September 2018

A chemical dealloying process for ternary Au55Cu25Si20 metallic glass ribbon is reported.
Flexible ITO films with atomically flat surfaces for high performance flexible perovskite solar cells
Authors: Kim Jae-Ho , Seok Hae-Jun , Seo Hyeong-Jin , Seong Tae-Yeon , Heo Jin Hyuck , Lim Sang-Hyuk , Ahn Kyung-Jun , Kim Han-Ki
Published: September 2018

Flexible perovskite solar cells with an ion plated ITO electrode showed a higher power conversion efficiency and better flexibility than sputtered ITO-based perovskite solar cells.
Fluorinated triazole-containing sphingosine analogues. Syntheses andin vitroevaluation as SPHK inhibitors
Authors: Escudero-Casao Margarita , Cardona Adrià , Beltrán-Debón Raúl , Díaz Yolanda , Matheu M. Isabel , Castillón Sergio
Published: September 2018

Fluorinated triazole-containing sphingosine analogues as SPHK inhibitors were synthesized from a common alkynyl aziridine key synthonviaenantioselective organocatalyzed aziridination.
Visible light catalyzed reaction of α-bromochalcones with chalcones: direct access to the urundeuvine scaffold
Authors: Karki Bhupal Singh , Pramanik Mukund M. D. , Kant Ruchir , Rastogi Namrata
Published: September 2018

The α-keto vinyl radicals generated from α-bromochalcones under visible light photoredox catalyzed conditions were trapped by chalcones.
Optimized synthesis and indium complex formation with the bifunctional chelator NODIA-Me
Authors: Weinmann Christian , Holland Jason P. , Läppchen Tilman , Scherer Harald , Maus Stephan , Stemler Tobias , Bohnenberger Hendrik , Ezziddin Samer , Kurz Philipp , Bartholomä Mark D.
Published: September 2018

Multi-step synthetic route provides the ligand NODIA-Me in high yield. Radiolabeling with [111In]InCl3yields stable complexes in high radiochemical purity and yield.
Stereoselective ozonolysis of TMS-substituted allylic alcohol derivatives and synthesis of 14R,15S- and 14S,15S-diHETE
Authors: Saito Shun , Yamazaki Takashi , Kobayashi Yuichi
Published: September 2018

Ozonolysis of (E)- and (Z)-TMS-allylic alcohol derivatives gaveantiandsynisomers of dihydroxyl aldehyde derivatives. This ozonolysis was applied for the synthesis of 14,15-diHETE.
Selective and sensitive spectrofluorimetric quantification of velpatasvir in presence of sofosbuvir. Application to their co-formulated tablet
Authors: El-Gamal Rania M. , Abdel-Gawad Sherif A. , Belal Fathalla F. , Moustapha Moustapha E.
Published: September 2018

A new sensitive, rapid and simple spectrofluorimetric method was utilized for the assessment of velpatasvir (VPS) in its bulk form as well as in its combined tablet with sofosbovir (SFV).
An adaptive geometry regulation strategy for 3D graphene materials: towards advanced hybrid photocatalysts
Authors: Xie Xiuqiang , Zhang Nan , Tang Zi-Rong , Xu Yi-Jun
Published: September 2018

Geometry regulation of 3D graphene-based photocatalysts by increasing the surface-to-volume ratio to concurrently promote light–photoactive material interactions and improve reactant adsorption towards enhanced performance.
Antisolvent processing of lead halide perovskite thin films studied by in situ X-ray diffraction
Authors: Bruening Karsten , Tassone Christopher J.
Published: September 2018

The conversion mechanism from the precursor ink to the perovskite film using antisolvent-induced crystallization has been studied using in situ X-ray diffraction during blade coating and antisolvent deposition.
Mesoporous carbon matrix confinement synthesis of ultrasmall WO3nanocrystals for lithium ion batteries
Authors: Wang Changyao , Zhao Yujuan , Zhou Lili , Liu Yang , Zhang Wei , Zhao Zaiwang , Hozzein Wael N. , Alharbi Hind M. S. , Li Wei , Zhao Dongyuan
Published: September 2018

Ultrasmall WO3nanocrystals are synthesizedviaa mesoporous carbon matrix confinement growth strategy for lithium ion batteries.
Few-layered ReS2 nanosheets vertically aligned on reduced graphene oxide for superior lithium and sodium storage
Authors: Liu Sheng , Liu Yan , Lei Wanwan , Zhou Xin , Xu Kang , Qiao Qiquan , Zhang Wen-Hua
Published: September 2018

Hybrid 2D–2D heterostructures, consisting of few-layered ReS2 nanosheets vertically anchored on both sides of reduced graphene oxide, have been prepared and evaluated for energy storage application.
Doubly boron-doped pentacenes as emitters for OLEDs
Authors: John Alexandra , Bolte Michael , Lerner Hans-Wolfram , Meng Guoyun , Wang Suning , Peng Tai , Wagner Matthias
Published: September 2018

Doping of pentacene with two boron atoms leads to highly fluorescent compounds, which have successfully been used for OLED fabrication.
Effects of FM0807, a novel curcumin derivative, on lipopolysaccharide-induced inflammatory factor release via the ROS/JNK/p53 pathway in RAW264.7 cells
Authors: Wu Yilong , Liu Zhiwei , Wu Weifang , Lin Su , Zhang Nanwen , Wang Honglin , Tan Shuangyu , Lin Peimin , Chen Xiaole , Wu Lixian , Xu Jianhua
Published: September 2018

Purpose: Sepsis is a systemic inflammatory response caused by infection. Curcumin is known to have antioxidant and anti-inflammatory activities. FM0807, a curcumin derivative, was investigated in the present study to determine its effect on cytokines and the possible molecular mechanism. Main methods: The experiments were carried out in lipopolysaccharide (LPS)-induced RAW 264.7 cells. Cell viability was measured by MTT assay. ELISA, Griess assays, fluorescence-based quantitative PCR, flow cytometric analysis, 2′,7′-dichlorodihydrofluorescein diacetate (DCFH-DA) experiments, and Western blotting were carried out to assess the potential effects of FM0807 on LPS-induced RAW 264.7 cells. Significant findings: FM0807 had no cytotoxic effects on RAW 264.7 cells. Furthermore, pretreatment with FM0807 inhibited the inflammatory factor tumor necrosis factor-α (TNF-α), interleukin (IL) 1β (IL-1β), IL-6, and inducible nitric oxide synthase (iNOS) at the protein and gene levels. FM0807 also inhibited the production of reactive oxygen species (ROS) and apoptosis. In addition, the activation of the ROS/JNK (c-jun NH2-terminal kinase)/p53 signaling pathway was inhibited by FM0807 in RAW 264.7 cells in vitro. Conclusion: FM0807 has anti-inflammatory activity in vitro, which suggests a potential clinical application in sepsis. The anti-inflammatory activity of FM0807 may be mediated by the ROS/JNK/p53 signaling pathway.
ADMM‐based algorithm for solving DC‐OPF in a large electricity network considering transmission losses
Authors: Abraham Mathew P. , Kulkarni Ankur A.
Published: September 2018

The authors address the problem of solving DC‐optimal power flow (OPF) considering transmission losses in a large electricity network. The loss in a line is considered in the power balance equation and is taken as proportional to the absolute value of the flow through the line. Many standard solvers fail to converge to an optimal solution of the DC‐OPF for comparatively large bus systems, even with a quadratic cost of generation. The authors use a decomposition algorithm such as alternating directions method of multipliers (ADMM) to address this problem. However, the ADMM algorithm cannot be directly applied to this problem because of the sparsity of the coefficient matrices of the objective function and the presence of inequality constraints. Thus, the authors introduce two relaxations to the DC‐OPF problem, namely the regularisation and the modified penalisation. The authors provide a novel ADMM algorithm for the regularised and the modified penalised problem which converges to an optimal solution even for large bus systems. The authors show that the ADMM algorithm converges near to the optimal solution of the DC‐OPF problem if the regularisation and modified penalisation parameters are chosen carefully. Numerical simulations illustrate the effectiveness of the algorithm.
Insulation condition assessment of high‐voltage rotating machines using hybrid techniques
Authors: Gopinath Singaram , Sathiyasekar Kumarasamy , Padmanaban Sanjeevikumar , Chokkalingam Bharatiraja
Published: September 2018

The enduring life span of the machine insulation will be decided based on degradation level in motor and generator stator windings. The non‐destructive diagnostic tools like dielectric loss and capacitance test and partial discharge (PD) analysis, recognized to access the deterioration in the insulation system of rotating machines. The experiments reveal various characteristic parameters such as leakage current, dielectric dissipation factor, the capacitance value, and PD magnitude. The integrity of the rotating machine can be find out by analyzing these parameters. This research study shows the hybrid method for prediction of insulation condition in the stator winding by utilizing the artificial neural network (ANN) with gravitational search algorithm in comparison with ANN and ANN–genetic algorithm. The advent of expert systems ensures the quality assurance and service life assessment of the high‐voltage assets. It offers a predictive maintenance solution to personnel dealt with power utilities thereby increasing the uptime, reliability, and productivity, which in turn reducing the operating costs, downtime and unplanned outages. For testing and predicting the insulation status, several 11 kV machines are considered. The predicted results using hybrid techniques extend a close agreement with reference to the data obtained from the experiments performed. The proposed method indicate the competent and trustworthy, by the presented test results.
Analysis of cooling and heating system with Peltier cell
Authors: Lyskawinski Wieslaw , Szelag Wojciech
Published: September 2018

The article presents a developed cooling/heating system with a Peltier cell. This system is intended for local improvement of thermal comfort. The interaction between the Peltier module, a water block and the heat sink with a fan has been investigated. A thermal model of the cooling/heating system has been developed, as well as software for determining parameters of the Peltier modules and for analysis of the system operation conditions has been implemented. The obtained results of calculations were compared with the results of experimental tests.
Hybrid forecasting of PM2.5 using SOFM and ELM
Authors: Siwek Krzysztof , Grzywacz Tomasz
Published: September 2018

The article presents a new approach to atmospheric PM2.5 dust prediction using an Extreme Learning Machine (ELM) neural network with clusterization done by the Self Organizing Feature Map (SOFM). This work is concerned with the calculation of the average level of air particulate matters PM2,5 in Warsaw's Ursynow one day ahead. The brief description of the hazards posed by air pollution is included. The work presents a short description of the SOFM and ELM networks, and their hybridized system used as a prediction tool. The analysis of the obtained results was presented and discussed.
Characteristics of nanoclay reinforced starch biocomposites through the extrusion process
Authors: Suryanto Heru , Rahmawan Alfian Widi , Solichin  , Rizki Tata Sahana , Yanuhar Uun
Published: September 2018

The development of materials engineering has led to many significant discoveries one of which is biocomposite with its diverse applications. The addition of reinforcing materials in biopolymers improves the composite properties. This study aimed at investigating the effect of adding nanoclay on the tensile strength, morphology, functional group, and structure of extruded biocomposites with cassava starch matrix. This experimental research involved different concentrations of nanoclay i.e. 0%, 2.5%, 5%, 7.5%. The extrusion process was performed using a single screw extruder at 120°C. The samples were characterized by tensile testing, XRD, and SEM. The biocomposite reinforced with 5% nanoclay had the highest tensile strength of 10.8 MPa. The highest diffraction peak at 2θ of 19.4° appeared in the sample added with 5% nanoclay. The addition of excessive amounts of nanoclay can hinder the formation of exfoliated structures.
Demand forecasting in Small and Medium Enterprises (SMEs) ED Aluminium Yogyakarta using causal, time series, and combined causal-time series approaches
Authors: Isnaini Wildanul , Sudiarso Andi
Published: September 2018

ED Aluminium is the biggest Small and Medium Enterprises (SMEs) in Daerah Istimewa Yogyakarta (DIY) with 90 number of workers and 1,5 ton ingot capacity for production (Isnaini, 2014). Inventory data in December 2015 indicates that some products are overstocked (9%) and stockout (83%). This condition can happend because that SMEs still using intuition to predict the number of demand. Inventory fluctuation causes the inventory cost increases while overstock happend and lost the opportunity cost during stockout. To avoid overstock and stockout, the determination of demand with exact method is needed and one of them can be solved by forecasting method. This study aims to find the best forecasting methods of demand in 2015 using causal, time series, and combined causal-time series approces that better than the actual condition. The results of this research is the best forecasting method used to predict the number of sales in January-November 2015, that are SARIMA (3,1,1)(0,1,1)12 for WB, SARIMA (1,1,1)(1,0,1)6 for WSD, SARIMA (1,1,1)(1,1,0)6 for DE, SARIMA (2,1,1)(1,1,0)6 for PE, and SARIMA (2,1,3)(0,1,0)12 for PT.
The hybrid-model architectural modelling based on ARIMA-BPNN methods for building materials demands forecasting
Authors: Hayat Cynthia , Soenandi Iwan Aang
Published: September 2018

The development of hybrid acrhitectural model is made to facilitate the decision making in determining the demand for building materials procurement. The ARIMA time series and non-linear BPNN models are selected considered that they are able to have a high degree of accuracy of the generated output. The data used were the secondary data collected in the period of February 2015-October 2016 which consisted of month of sales period, product prices, sales history (per type of building materials), estimated number of renovation projects, estimated number of new construction projects, and number of competitors. This research was conducted through 2 stages, they were; the processing of time series using ARIMA through three basic steps, namely identification, assessment and testing, and diagnostic examination; and the BPNN processing through data training and data testing stages. The produced hybrid architectural model had 99% accuracy with an MSE of 0.00099926 on epoch 975 and training period of 00:00:01. The Regression results showed that the produced model has a high degree of accuracy in generating the ouput of building materials demand forecasting.
Evaluation of random parking layout SBA mall using integer linear programing
Authors: Sentia Prima Denny , Prasanti Nissa , Andriansyah  , Pulungan Rizfa Ramadhani
Published: September 2018

SBA Mall is the largest shopping center in Aceh. The number of vehicles visitors reach 1.300 units of cars every day so it takes parking space that can accommodate visitor’s vehicles. Setting the parking is very important to produce parking space with a lot of capacity, as well as comfortable and safe for visitors. The problem that arises today is the application of the parking rules that have not been applied in the parking area of SBA Mall. Integer Linear Programming (ILP) in this research is used to model parking layout by planning three scenarios that is based on the actual condition, the width of alley according to the Decree of Directorate General of Land Transportation without pedestrian facility, and all the size of parking lot fully according to the Decree mentioned above. The result shown that the total unit of parking space (UPS) based on the first scenario is 119 UPS, the second scenario is 94 UPS and in the third scenario is 97 UPS.
Modelling of Cutting Tool Condition Monitoring System (CTCMS) to support industry 4.0
Authors: Setiawan Ari , Angela Dina , Irawan Billy
Published: September 2018

One of the value drivers in Industry 4.0 is asset utilization that has capability to remote monitoring and controlling the assets. Some of the problems on the production floor, especially in modern manufacturing areas such as machining process in the Flexible Manufacturing System (FMS), requires the condition of the cutting tools. This paper will discuss a model of cutting tools online monitoring system that operated in web based application. The model involves three sensors and a human machine interface to show the cutting tools condition. The sensors consist of temperature sensor, accelerometer, and electrical power consumption sensor; while in the experiment, the data of those sensors will be compared with the flank wear and crater wear on the cutting tools. The model shows that the data of temperatures, vibration and power consumption are collected by the sensors and sent by internet to the monitoring systems.
An integrated fuzzy AHP and TOPSIS model for evaluating the performance of raw material suppliers: A case study in lasem batik writing centre
Authors: Sari Diana Puspita , Wijayanti Wismar Rizki , Prayogo Adhie , Mujiya Ulkhaq M. , Rinawati Dyah Ika
Published: September 2018

Batik is labelled as an identity of Indonesia as in 2009 UNESCO recognized batik as a cultural heritage of no object. The export value of batik in 2015 reached USD 156 million. This study aims to evaluate the performance of raw material suppliers using five criteria, i.e., price, quality, delivery, flexibility, and service. The combination of the fuzzy analytic hierarchy process (FAHP) and technique for others reference by similarity to ideal solution (TOPSIS) are used here to achieve the research objective. FAHP was used to determine the weight of each criterion; while TOPSIS was employed to identify the ranking of all alternatives to be considered. A case study was conducted at Lasem batik writing centre. FAHP results show that quality becomes the most important criterion with the weight of 0.266. The best suppliers of raw materials are LI, PA, and SL for fabrics, dyes, and wax respectively. Findings of this study may offer batik craftsmen in determining what are the best suppliers to be considered based on their performance.
Preventive maintenance policy on leasing by considering the usage rate
Authors: Jufriyanto Moh. , Kurniati Nani , Supriatna Ade
Published: September 2018

The needs of the consumers about the functionality of a product and increase maintenance costs of equipment caused the prices of products and treatments to be expensive. Therefore, the company considers the lease rather than buy it. Leasing provides interesting strategy when dealing with expensive equipment. Policy maintenance that is done to the product that has decreased performance. Minimum repair done to fix failed equipment in order to return to operational condition, while imperfect preventive maintenance to improve the operational conditions of the equipment to avoid failure. Time duration for a minimum repair neglected. The lessor will charge a penalty (penalty cost) if the lease equipment failure. Mathematical model built for the minimization cost of maintenance policy. In the final part, the numerical experiment are given to show the maintenance policy taking into account the rate of usage (usage rate) by knowing the minimization the resulting costs.
Design of working procedure for handling the breakdown machine in parameter of reaction time based on Jidoka system approach in cement company
Authors: Tri Putri Nilda , Elita Amrina , Dina Rahmayanti , Gilang Shifanof
Published: September 2018

Packaging is not a complementary of the product. Packaging is an interface between producer and consumer in a supply chain. Portland cement is one of the products which is usually distributed in unit packed with bags made of kraft paper. Cement production that done with large capacity machines requires the amount of bag in quantity that much anyway. The production of bag factory in Cement company line 4 ideally could reach 9-10 million bags per month. In fact, the average production of cement bag from January to June 2012 is 6.5 million bags per month. In addition, the average defects of work in process in the range of the same month reached 56,000 tubes per month. This indicates that engine breakdown is happen frequently and there is a lack of good performance in term of production process quality control. Long reaction time of operator against the possible breakdown and the breakdown that occur is the cause of the length of time handling problems on the machine, so much going on a lot of waste in time and there are work in process defects that pass to the next process. Minimizing the reaction time to the breakdown of machine can be done with the implementation of jidoka system on the production floor. Andon which is the tool of jidoka will ensure operator and other parties (operators, technicians, foreman) gather to repair the machine effectively and also efficient in term of time. The lights that flashing and the sound of alarm that raised by andon will ensure this happen. Working procedures with the jidoka system approach is proven can minimize the reaction time to the breakdown of machine. Based on calculations, minimizing of time can reach up to 93.66%. The mathematical model for the jidoka system approach that has been valid then converted to a standard operating procedure in handling the breakdown of machine in bag factory. The standard operating procedure that proposed will be technically efficient and effective in terms of time and method to handle the breakdown of machine.
Human error probability analysis of overhead crane operation in steel fabrication company using SLIM-DEMATEL-ANP method
Authors: Nurdiawati Annisya Arumy , Handoko Lukman , Disrinama Am Maisarah , Amrullah Haidar Natsir , Dermawan Denny , Shah Muhammad , Hamzah Fais
Published: September 2018

The accident record from a steel fabrication company in 2014-2017 shows that the most frequent accidents take place in overhead crane operation with a percentage of 42%. The overhead crane operation has the greatest potential of accidents with human error as the main cause. The purpose of this study is to determine what factors affect the occurrence of errors, to know how much HEPs, and to determine recommendations. The method used in this research is Success Likelihood Index Method (SLIM) with qualitative development using Decision Making Trial and Evaluation Laboratory (DEMATEL) which aims to establish the relationship among PSFs to be an easily comprehensible structured model by considering expert judgements and to solve dependency in a set of criteria. Analytic Network Process (ANP) is used to overcome the inconsistency of expert judgements and difficulty in selection and weighting. The calculation and analysis reveal that the highest Human Error Probability (HEP) value is shown by the task to handling or lifting with the value 0.000485. Impact assessment using the HEP value to determine probability and consequence is performed by expert judgements. Improvement recommendations are prioritized for high rating error tasks using Error Reduction Analysis.
Numerical simulation of the oxygen distribution in silicon melt for different argon gas flow rates during Czochralski silicon crystal growth process
Authors: Ida Zumrotul , Chen Jyh-Chen , Nguyen Thi Hoai Thu
Published: September 2018

The effects of argon gas flow rate on the oxygen concentration in Czochralski (CZ) grown silicon crystal were examined. To analyze the influence of the argon gas flow rate in CZ growth process, a 200 mm length silicon single crystal was grown. Different argon gas flow rates are considered. The melt flow pattern, temperature and oxygen concentration distributions in the melt and crystal-melt interface are calculated. The results show that the transport of oxygen impurity is quite dependent on the flow motion in the melt. As the argon gas flow rate increases, there is no fundamental change in flow motion of the melt and the oxygen concentration decreases to a minimum value. When the argon gas flow rate increases further, the flow pattern under the melt-crystal interface starting changes and the oxygen concentration has increased after. Therefore, there is an optimum value for the argon gas flow rate for obtaining the lowest oxygen concentration in the melt.
Numerical investigation on the elastic modulus of rubber-like materials by a rigid ball indentation technique
Authors: Setiyana Budi , Sugiyanto  , Jamari J. , Khafidh M.
Published: September 2018

The indentation technique has been practically proven to be useful in determining mechanical properties of materials, such as hardness and elastic modulus for rubber-like materials (elastomers). However, tensile test method is often conducted because of obtaining the mechanical strength in addition to the elastic modulus of the elastomer. In this paper, a numerical study is proposed to investigate the elastic modulus of the elastomer by applying Finite Element Analysis (FEA). With the availability of Strain Energy Function (SEF) data from the material testing, the investigation is carried out by indentation technique for Natural Rubber (NR) and Styrene Butadiene Rubber (SBR). On the rubber surface, a rigid ball indenter is pressed under specified indentation force and the contact depth resulted is observed. Based on the ASTM (American Society for Testing and Materials) formulation, the elastic modulus from the indentation technique can be estimated. In general, results show that the elastic modulus obtained from the indentation technique agree with the tensile test results. Thus, the proposed numerical method is validly applied in determining the elastic modulus.
Pickup and delivery problem with LIFO, time duration, and limited vehicle number
Authors: Andriansyah  , Prasanti Nissa , Denny Sentia Prima
Published: September 2018

This study discusses pickup and delivery problem with last-in-first-out, time duration, and limited vehicle number which is usually experienced by door to door courier service. In this problem, company’s vehicles will pick customer’s goods and deliver them from one location to another. Technically, LIFO policy is enforced when the assigned vehicles for transporting the goods have a single access point to loading-unloading process. This study develops integer linear programming formulation based on three index formulation. The model is solved by branch-and-bound algorithm. From experimental study, the result shows that optimal global solution, but takes long computation time. This computation time depends on the type of data used. From the 8 types of data with the same number of customers and vehicles, there is 1 data that can be solved within 1 second.
Dynamic lot sizing problem under uncertainty of returned products in remanufacturing industry
Authors: Setyoaji Iman
Published: September 2018

Remanufacturing processes face uncertainty in the quality of the items being returned by customers, this significant variability complicates the control of inventories. Demands can be satisfied by procured new items, but also by remanufactured returned items. This paper develops dynamic lot sizing model for remanufacturing industry under uncertainty of returned items and proposes Bayesian Inference to estimate the replacement ratio of returned items that used to determine those lot sizes for new items. The objective of this paper is to minimize the total cost composed of holding cost and set-ups cost. A numerical example is provided based on case study. The result shows that total cost is reduced to be 45%.
Krebs-Immuntherapie: Antworten auf häufig gestellte Fragen
Authors: Schirrmacher Volker
Published: September 2018

Unser Gesprächspartner: Prof. Dr. rer. nat. Volker Schirrmacher
Neuropalliativmedizinische Aspekte bei Patienten mit Parkinsonerkrankung
Authors: Eva Weck Christiane , Lorenzl Stefan
Published: September 2018

Eine palliative Betreuung von Parkinsonpatienten gewinnt zunehmend an Bedeutung. Die Symptomlast der Patienten in fortgeschrittenen Stadien ist komplex und hoch. Sie ist oft vergleichbar oder sogar größer als die vieler onkologischer Palliativpatienten. Viele Patienten in den fortgeschrittenen Phasen des M. Parkinson haben palliative Bedürfnisse. Auf Grund von langen, nur sehr eingeschränkt vorhersagbaren Krankheitstrajektorien ist eine Einbindung in gängige Palliativstrukturen nicht einfach. Insbesondere ein Abschätzen des richtigen Zeitpunktes für den Beginn einer palliativen Betreuung ist schwierig. Das Auftreten von Schluckstörungen definiert den Beginn der späten und palliativen Krankheitsphase und kann als Orientierungshilfe genommen werden. In der aktuellen Arbeit soll Bezug genommen werden auf palliativmedizinische Versorgung von Patienten mit Parkinson im speziellen die finale Phase betreffend und mit besonderem Augenmerk auf die pflegenden Angehörigen.
Ernährungsaspekte bei Morbus Parkinson: Erkrankungsrisiko, Diät und Therapie von Funktionsstörungen des Verdauungstraktes
Authors: Csoti Ilona , Dresel Christian , Hauptmann Björn , Müller Thomas , Redecker Christoph , Warnecke Tobias , Wüllner Ulrich
Published: September 2018

Daten aus epidemiologischen Studien, die mögliche Assoziationen bestimmter Nahrungsmittel mit dem Risiko an der Parkinson’schen Krankheit zu erkranken untersucht haben, suggerieren, dass manche Nahrungsmittel, wie z. B. nikotinreiche Paprika, dieses modifizieren können. Auch scheinen nach der Analyse einer Reihe von Medikamenten-Zulassungsstudien positive Effekte auf den Krankheitsverlauf durch Coffein (Kaffee) und höhere Harnsäure-, sowie Gesamtcholesterinspiegel vor allem bei Männern vorhanden zu sein.

Noch ist aber ungewiss, ob eine Diät oder besondere diätetische Konzepte und eventuell auch die Auswirkungen der Mikrobiota des Darmes auf den menschlichen Stoffwechsel, eine Rolle für den Krankheitsverlauf spielen könnten. Angesichts fehlender prospektiver Ernährungsstudien können nur allgemeine Empfehlungen gegeben werden: eine „ausgewogene“ saisonal-regional frische Ernährung mit Schwerpunkten auf Gemüse, Obst, Nüssen, Fisch, wenig rotem Fleisch und wenig hochverarbeiteter Nahrung mit nur einem geringen Anteil einfacher Kohlenhydrate könnte hilfreich sein. Speziell für ältere Menschen ist eine eiweißarme Diät nicht sinnvoll. Vielmehr muss, um der Entwicklung von Sarkopenie und Malnutrition im Alter vorzubeugen, besonders auf ausreichende Eiweißzufuhr geachtet werden. Die Versorgung mit den Vitaminen B12 und D3 muss sichergestellt werden – gleichzeitig muss von der unkritischen Anwendung von Nahrungsergänzungsmitteln, insbesondere von Mikronährstoffen mit vermuteten anti-oxidativen Eigenschaften, abgeraten werden.
Isoflavones from Camphorosma lessingii Inhibit the Organic Anion Transporters OAT1 and OAT3
Authors: Wang Xinhui , Wang Dujuan , Wang Xue , Khutsishvili Manana , Tamanyan Kamilla , Fayvush George , Atha Daniel , Zhang Youcai , Borris Robert
Published: September 2018

Phytochemical investigation of Camphorosma lessingii has resulted in the isolation of four previously unreported isoflavones (1–4) and eight known compounds (5–12). Nine of these compounds (1–6, 8–10) are reported for the first time from members of the family Amaranthaceae. The structures of all isolated compounds were determined by spectroscopic methods, primarily one-dimensional and two-dimensional nuclear magnetic resonance and mass spectrometry. The absolute configuration of 6 was confirmed by circular dichroism. Inhibition of the organic anion transporters, OAT1 and OAT3, by the isolated compounds was evaluated. Among them, 7, 2′-dihydroxy- 6,8-dimethoxyisoflavone (1), 2′-hydroxy-6,7,8-trimethoxyisoflavone (2), 6,2′-dihydroxy-7,8-dimethoxyisoflavone (3), and 7-methoxyflavone (5) showed a significant inhibitory effect on 6-carboxyfluorescein uptake mediated by OAT1 and OAT3.
Highly Diastereo-, α-Regioselective Catalyst-Free Construction of Adjacent Dispirobisoxindoles with Three Contiguous Quaternary Carbon Centers
Authors: Jiang Yan , Tian Min-Yi , Liu Xiong-Li , Chang Shun-Qin , Xu Sheng-Wen , Zuo Xiong , Chen Shuang
Published: September 2018

A new methodology was developed for the highly diastereoselective construction of dispirobisoxindole scaffolds via a domino α-regioselective Michael/cyclization reaction sequence of 3-isothiocyanato oxindoles and isatylidene malononitriles under catalyst-free conditions. Complex polycyclic oxindoles featuring two side-by-side oxindole skeletons and three contiguous quaternary carbon centers were synthesized in up to 95% yield and >20:1 dr. This protocol could provide libraries of stereochemically rich small molecules that will help in the search for new bioactive molecules.
Ist eine Messung der Knochendichte für Frauen über 65 Jahren sinnvoll
Authors: Pfeifer Michael
Published: September 2018

Die „U.S. Preventive Services Task Force” (USPSTF), die das Gesundheitsministerium zu Fragen der Krankheitsprävention berät, spricht sich für ein Osteoporose-Screening von Frauen ab dem 65. Lebensjahr aus. Jüngere postmenopausale Frauen sollten sich untersuchen lassen, wenn es Hinweise auf ein erhöhtes Risiko gibt. Für Männer fand das Gremium keine gesicherten Anhaltspunkte auf einen Nutzen. Die Empfehlungen und der Evidenz-Report wurden im U.S. amerikanischen Ärzteblatt „JAMA” (2018; doi:10.1001/jama.2018.7498 und 10.1001/jama.2018.2018/6537) veröffentlicht (1).
Unraveling the spectral signatures of solvent ordering in K-edge XANES of aqueous Na+
Authors: Galib M. , Schenter G. K. , Mundy C. J. , Govind N. , Fulton J. L.
Published: September 2018

The aqueous solvation structure of the Na+ ion is studied both by molecular dynamics (MD) simulations and K-edge X-ray absorption near edge spectroscopy (XANES). We present a systematic study contrasting the differences in the predicted XANES spectra, using molecular configurations generated from classical and quantum MD. Using a set of suitable order parameters, we elucidate how the spectroscopic features are influenced by the local solvation structure around the Na+ ion. Our findings suggest that XANES is sensitive to fluctuations between the first and second solvation shells and can distinguish between classical and quantum interaction representations used to generate molecular ensembles.
On slowly rotating axisymmetric solutions of the Einstein-Euler equations
Authors: Makino Tetu
Published: September 2018

In recent studies, we have constructed axisymmetric solutions to the Euler-Poisson equations which give mathematical models of slowly uniformly rotating gaseous stars. We try to extend this result to the study of solutions of the Einstein-Euler equations in the framework of the general theory of relativity. Although many interesting studies have been done about axisymmetric metric in the general theory of relativity, they are restricted to the region of the vacuum. Mathematically rigorous existence theorem of the axisymmetric interior solutions of the stationary metric corresponding to the energy-momentum tensor of the perfect fluid with non-zero pressure may be not yet established until now except only one found in the pioneering work by Heilig done in 1993. In this article, along a different approach to that of Heilig’s work, axisymmetric stationary solutions of the Einstein-Euler equations are constructed near those of the Euler-Poisson equations when the speed of light is sufficiently large in the considered system of units, or, when the gravitational field is sufficiently weak.
Walking droplets in a circular corral: Quantisation and chaos
Authors: Cristea-Platon Tudor , Sáenz Pedro J. , Bush John W. M.
Published: September 2018

A millimetric liquid droplet may walk across the surface of a vibrating liquid bath through a resonant interaction with its self-generated wavefield. Such walking droplets, or “walkers,” have attracted considerable recent interest because they exhibit certain features previously believed to be exclusive to the microscopic, quantum realm. In particular, the intricate motion of a walker confined to a closed geometry is known to give rise to a coherent wave-like statistical behavior similar to that of electrons confined to quantum corrals. Here, we examine experimentally the dynamics of a walker inside a circular corral. We first illustrate the emergence of a variety of stable dynamical states for relatively low vibrational accelerations, which lead to a double quantisation in angular momentum and orbital radius. We then characterise the system’s transition to chaos for increasing vibrational acceleration and illustrate the resulting breakdown of the double quantisation. Finally, we discuss the similarities and differences between the dynamics and statistics of a walker inside a circular corral and that of a walker subject to a simple harmonic potential.
Broadband loop gap resonator for nitrogen vacancy centers in diamond
Authors: Eisenach E. R. , Barry J. F. , Pham L. M. , Rojas R. G. , Englund D. R. , Braje D. A.
Published: September 2018

We present an S-band tunable loop gap resonator (LGR), which provides strong, homogeneous, and directionally uniform broadband microwave (MW) drive for nitrogen-vacancy (NV) ensembles. With 42 dBm of input power, the composite device provides drive field amplitudes approaching 5 G over a circular area ≳50 mm2 or cylindrical volume ≳250 mm3. The wide 80 MHz device bandwidth allows driving all NV Zeeman resonances for bias magnetic fields below 20 G. The device realizes percent-scale MW drive inhomogeneity; we measure a fractional root-mean-square inhomogeneity σrms = 1.6% and a peak-to-peak variation σpp = 3% over a circular area of 11 mm2 and σrms = 3.2% and σpp = 10.5% over a larger 32 mm2 circular area. We demonstrate incident MW power coupling to the LGR using two methodologies: a printed circuit board-fabricated exciter antenna for deployed compact bulk sensors and an inductive coupling coil suitable for microscope-style imaging. The inductive coupling coil allows for approximately 2π steradian combined optical access above and below the device, ideal for envisioned and existing NV imaging and bulk sensing applications.
Time-of-flight neutron total scattering with applied electric fields: Ex situ and in situ studies of ferroelectric materials
Authors: Usher Tedi-Marie , Forrester Jennifer S. , McDonnell Marshall , Neuefeind Joerg , Page Katharine , Peterson Peter F. , Levin Igor , Jones Jacob L.
Published: September 2018

Characterizing the structural response of functional materials (e.g., piezoelectrics and ferroelectrics) to electric fields is key for the creation of structure-property relationships. Here, we present a new sample environment and data reduction routines which allow the measurement of time-of-flight neutron total scattering during the in situ or ex situ application of high voltage (<10 kV) to a sample. Instead of utilizing the entire detector space of the diffractometer, only selected regions of detector pixels with scattering at the desired angle to the sample electric field are interrogated, which allows the generation of orientation-dependent reciprocal space patterns and real-space pair distribution functions (PDFs). We demonstrate the method using the relaxor ferroelectric Na1/2Bi1/2TiO3 and observe lattice expansion parallel and contraction perpendicular to the electric field for both in situ and ex situ experiments, revealing the irreversible nature of the local scale structural changes to this composition. Additionally, changes in the distributions of nearest neighbor metal-oxygen bond lengths are observed, which have been difficult to observe in previously measured analogous orientation-dependent X-ray PDFs. Considerations related to sample positioning and background subtraction are discussed, and future research directions are suggested.
Thermal behavior, structure, dynamic properties of aqueous glycine solutions confined in mesoporous silica MCM-41 investigated by x-ray diffraction and quasi-elastic neutron scattering
Authors: Yoshida K. , Inoue T. , Torigoe M. , Yamada T. , Shibata K. , Yamaguchi T.
Published: September 2018

Differential scanning calorimetry, X-ray diffraction, and quasi-elastic neutron scattering (QENS) measurements of aqueous glycine solutions confined in mesoporous silica (MCM-41) were performed at different glycine concentrations, pH, and loading ratio (=mass of glycine solution/mass of dry MCM-41) in the temperature range from 305 to 180 K to discuss the confinement effect on the thermal behavior, the structure, and the dynamic properties of the solutions. The freezing points of the confined glycine solutions decreased, compared with those of the bulk solutions. The corresponding exothermic peak due to ice formation became broader with an increase in the glycine concentration. By subtracting X-ray diffraction patterns of dry MCM-41 from those of glycine solution-loaded MCM-41, information about the structure of the confined glycine solutions was obtained. The radial distribution functions of the confined glycine solutions showed that the peaks assigned to the interaction between glycine molecules and the surface silanol (Si–OH) groups of MCM-41 at pH = 5 were observed, in contrast to the case at pH = 2. The QENS data on H/D substituted aqueous glycine solutions gave the translational diffusion coefficients and the residence time of glycine and water molecules confined in MCM-41 individually. The activation energy of the diffusion coefficient of a glycine molecule at pH = 5 was larger than that at pH = 2. These results imply that glycine molecules locate near the pore surface of MCM-41 due to the formation of hydrogen bonding between glycine molecules and the silanol group of the MCM-41 wall at pH = 5.
Correlation of electrical characteristics with interface chemistry and structure in Pt/Ru/PbZr0.52Ti0.48O3/Pt capacitors after post metallization annealing
Authors: Gueye Ibrahima , Le Rhun Gwenael , Renault Olivier , Cooper David , Defay Emmanuel , Barrett Nicholas
Published: September 2018

We report the effect of post-metallization annealing (PMA) on the electrical behavior of Pt/Ru/PbZr0.52Ti0.48O3(PZT)/Pt capacitors and correlations with the physical chemistry of the top electrode/PZT interface. PMA improves the electrical characteristics, in particular the breakdown field while inducing important chemical and structural modifications at the interface. The Ru electrode layer is oxidized and disrupted. There is evidence for the formation of RuOx and ZrRuOx metallic phases at the interface but no Pb transport into the electrode region is observed.