bluuebunny/crossref_metadata_2025_split huggingface dataset:
Lead-free MCP to improve coincidence time resolution and reduce MCP direct interactions
Authors: Ota R , Nakajima K , Ogawa I , Tamagawa Y , Kwon S I , Berg E , Cherry S R , Shimoi H , Hasegawa Y , Nishizawa H , Shimano K , Hasegawa T 
Published: February 2021

Abstract
Achieving direct imaging of the annihilation position of a positron on an event-by-event basis using an ultrafast detector would have a great impact on the field of nuclear medicine. Cherenkov emission is the most attractive physical phenomenon for realizing such an ultrafast timing performance. Moreover, a microchannel-plate photomultiplier tube (MCP-PMT) is one of the most promising photodetectors for fully exploiting the fast timing properties of Cherenkov emission owing to its excellent single photon time resolution of 25 ps full width at half maximum (FWHM). However, as the MCP structure generally contains a lead compound, the gamma rays frequently and directly interact with the MCP, resulting in the degradation of its timing performance and generation of undesirable side peaks in its coincidence timing histogram. To overcome this problem, we have developed a new MCP-PMT based on an MCP consisting of borosilicate glass, thus drastically reducing the probability of the photoelectric effect occurring in the MCP. To evaluate its insensitivity to gamma rays and its timing performance, a coincidence experiment was performed and showed that the probability of direct interactions was reduced by a factor of 3.4. Moreover, a coincidence time resolution of 35.4 ± 0.4 ps FWHM, which is equivalent to a position resolution of 5.31 mm, was obtained without any pulse height/area cut, improving to 28.7 ± 3.0 ps when selecting on the highest amplitude events by careful optimization of the voltage divider circuit of the new MCP-PMT. The timing performance of this new MCP-PMT presents an important step toward making direct imaging possible.
Stochastic thermodynamics and fluctuation theorems for non-linear systems
Authors: Korbel Jan , Wolpert David H 
Published: February 2021

Abstract
We extend stochastic thermodynamics by relaxing the two assumptions that the Markovian dynamics must be linear and that the equilibrium distribution must be a Boltzmann distribution. We show that if we require the second law to hold when those assumptions are relaxed, then it cannot be formulated in terms of Shannon entropy. However, thermodynamic consistency is salvaged if we reformulate the second law in terms of generalized entropy; our first result is an equation relating the precise form of the non-linear master equation to the precise associated generalized entropy which results in thermodynamic consistency. We then build on this result to extend the usual trajectory-level definitions of thermodynamic quantities that are appropriate even when the two assumptions are relaxed. We end by using these trajectory-level definitions to derive extended versions of the Crooks fluctuation theorem and Jarzynski equality which apply when the two assumptions are relaxed.
Numerical study of energy transmission through copper-based nanofluid contained in a partially heated isosceles triangular cavity in the presence of heat source/sink
Authors: Siddiqui Muhammad Arshad , Mehmood Ziafat , Riaz Arshad , Lu Dianchen 
Published: February 2021

Abstract
This study reports computational simulation of natural convective energy transport through copper-based nanofluid contained in partially heated isosceles triangular conduit in the presence of invariable magnetic field under the influence of energy source/sink. Inclined sides of the enclosure are retained cold and horizontal boundary is supposed thermally insulated. Heat source of a particular length is placed on the horizontal wall. Relations expressing the energy transport and fluid flow are first dealt by penalty scheme and then composed expressions are assembled through Galerkin approximation scheme. Pertinent physical parameters governing the flow are the solid volume increment of nanoparticles (0.0 <

ϕ

< 0.06), Hartmann number (0 < Ha < 100), Rayleigh number (105 < Ra < 108) and coefficient of heat source/sink (−10 < Q < 10). It has been noted through this investigation that in consequence of magnetic force, reduction in heat transport occurs. Conduction and convection regimes are dominant for small and large Rayleigh numbers respectively. Energy transport rate is found zero on corners of the cold inclined walls. Obtained computational results reveal that the flow pattern relies considerably on the concentration of nanoparticles, coefficient of energy source/sink, Rayleigh and Hartmann numbers. Computed solutions are expressed through plots of streamlines, isothermal lines, and rate of local and overall energy flow. The current results are also validated through graphical comparison with the existing literature.
Vector kink-dark complex solitons in a three-component Bose–Einstein condensate
Authors: Li Yan , Qin Yan-Hong , Zhao Li-Chen , Yang Zhan-Ying , Yang Wen-Li 
Published: February 2021

Abstract
We investigate kink-dark complex solitons (KDCSs) in a three-component Bose–Einstein condensate (BEC) with repulsive interactions and pair-transition (PT) effects. Soliton profiles critically depend on the phase differences between dark solitons excitation elements. We report a type of kink-dark soliton profile which shows a droplet-bubble-droplet with a density dip, in sharp contrast to previously studied bubble-droplets. The interaction between two KDCSs is further investigated. It demonstrates some striking particle transition behaviours during their collision processes, while soliton profiles survive after the collision. Additionally, we exhibit the state transition dynamics between a kink soliton and a dark soliton. These results suggest that PT effects can induce more abundant complex solitons dynamics in multi-component BEC.
A novel consciousness emotion recognition method using ERP components and MMSE
Authors: Zheng Xiangwei , Zhang Min , Li Tiantian , Ji Cun , Hu Bin 
Published: February 2021

Abstract

Objective. Electroencephalogram (EEG) based emotion recognition mainly extracts traditional features from time domain and frequency domain, and the classification accuracy is often low for the complex nature of EEG signals. However, to the best of our knowledge, the fusion of event-related potential (ERP) components and traditional features is not employed in emotion recognition, and the ERP components are only identified and analyzed by the psychology professionals, which is time-consuming and laborious. Approach. In order to recognize the consciousness and unconsciousness emotions, we propose a novel consciousness emotion recognition method using ERP components and modified multi-scale sample entropy (MMSE). Firstly, ERP components such as N200, P300 and N300 are automatically identified and extracted based on shapelet technique. Secondly, variational mode decomposition and wavelet packet decomposition are utilized to process EEG signals for obtaining different levels of emotional variational mode function (VMF), namely

V
M
F

β
+
γ

, and then nonlinear feature MMSE of each

V
M
F

β
+
γ

are extracted. At last, ERP components and nonlinear feature MMSE are fused to generate a new feature vector, which is fed into random forest to classify the consciousness and unconsciousness emotions. Main results. Experimental results demonstrate that the average classification accuracy of our proposed method reach 94.42%, 94.88%, and 94.95% for happiness, horror and anger, respectively. Significance. Our study indicates that the fusion of ERP components and nonlinear feature MMSE is more effective for the consciousness and unconsciousness emotions recognition, which provides a new research direction and method for the study of nonlinear time series.
Natural partial order on semigroup partial linear transformation with restricted range
Authors: Himayati A I A , Prasetyanto M A 
Published: February 2021

Abstract
The set with assosiative binary operations is semigroup. Of all set partial linear transformations with a composition function is semigroup which is called a partial linear transformation semigroup that is denoted by (PT (X), o). If Y is a subspace of X, with all images of PT (X) a subset of Y, so the semigroup which is formed is a semigroup of partial linear transformation with restricted range that is denoted by (PT(X,Y),o). A natural partial order is a relation which defined by a ≤ b if only if a = xb = by, xa = a for some x,y ∈PT(X,Y) in a semigroup partial linear transformation with restricted range. In this article using the literature study method, it discusses the characterization of natural partial order on partial linear transformations semigroups with restricted range resulting neccesary and sufficient condition for a natural partial order in semigroup partial linear transformation with restricted range.
The Role of Electronic Customer Relationship Management (E-CRM) In Improving Service Quality
Authors: Adnan Ahmad Zaelani , Rahayu Agus , Hendrayati Heny , Yusuf Ramayani 
Published: February 2021

Abstract
Electronic Customer Relationship Management(E-CRM) is one of business concepts and technology that supported by information systems to integrate all of business proccess that customer interacted. The most common E-CRM implementation in hotel industry is website. This research is to know the role of E-CRM to improve service quality, describe the implementation of E-CRM, understand the guest service procedure in, and to know the service quality through E-CRM in Prama Grand Preanger Bandung. The role of E-CRM by giving understandable information quality through two languages, ease of navigation, consumer service quality, fulfilling guests request, integrated marketing channels, online community through social media, giving guests rewards, personalization levels, and site security. Prama Grand Preanger Bandungs ECRM applies compatible with common information, alternative contact, membership, automatic e-mail, and instructions for new guest. Service is done by giving informations about room reservation, payment method, and transaction security. Service quality through E-CRM is generaly acceptable by hotel guests because of the ease in getting information and room reservation.
Analysis of the Impact of using Syariah Bonds (Sukuk) and Conventional Bonds on Stock Returns for Investors in Indonesia: Study of Manufacturing Companies Listed on the IDX in the year 2015-2017
Authors: Dian Rahmawati I. , Qudus.SN N. , Dian Pertiwi R 
Published: February 2021

Abstract
The stock market is an integral part of economic activity in many countries. One of the stock market types is financial obligations. In Indonesia has developed two types of financial obligations are Sharia-based obligations called Sukuk, and non-Sharia ones called conventional obligation. This study aims to analyze the impact of Sukuk and conventional obligation issuance on stock returns. The company under review is a company that issues obligation. The study uses event studies to see the reaction of the stock market to the event of issuance of Sukuk and conventional obligation. The results of the study show that Sukuk and conventional obligation affect stock returns.
Learning Materials Based On Digital Art Student Creativity in Universitas Muhammadiyah Tapanuli Selatan
Authors: Ariaji Rizky , Nasution Ahmad Husein , Dharma Harahap Andes Fuady , Abubakar  , Tuah Sahlan , Darwis  , Hilda Lelya 
Published: February 2021

Abstract
In fact, the teaching materials are still using teaching books, so in the learning media courses will be developed based on digital art teaching materials at Universitas Muhammadiyah Tapanuli Selatan. In the development of the teaching materials contain teaching materials tailored to the curriculum that applies with the tools and materials contained in the environment. Research objectives to know the expert opinion on the feasibility test and influence of the development of digital art-based teaching materials. Research and Development (R&D) method of ADDIE model (Analyze, Design, Development, Implementation, and Evaluation). For the average result of expert validator assessments on this study covers aspects of feasibility standards based on BSNP by 3.27, then the validity criteria is quite good (quite valid and need revision). The result of student learning creativity Assessment was obtained at 3.18, hence the creativity category is creative.
Teacher’s Efforts to Enhance Students’ Competence in Madrasah Ibtidaiyah in Science Skills and Academic Achievement
Authors: Saepuloh Aep , Rosfiani Okta , Hermawan CecepMaman , Sutiawati  , Apriyana Mita 
Published: February 2021

Abstract
Teaching using the demonstration model shows that we are ready to take risks by encouraging teachers and students to be, and this adds credibility and a foundation for various things in professional learning sessions. This research aims to improve academic achievement and student skills in science. This research uses an action research method with a cycle system, which consists of planning, implementation, observation, reflection, and revision. This practical action research was conducted on fourth grade MI students in elementary school in South Tangerang. The results show a gradual increase in student learning outcomes. Where pre-cycle shows only 59.25% of students who have completed mastery of learning outcomes, cycle 1 of student mastery learning increases to 74.07%, in cycle 2 student mastery of learning increases rapidly to 92.59%. This paper argues that the application of the demonstration model has been shown to improve student learning outcomes on science subjects. This research also shows that the direct teaching model is proven to be able to transfer science skills to students better.
The Advantages of Pleco and Google Translate Applications in Assisting Mandarin Language Learning
Authors: Ying Yi , Theresia  , Febriana Vivi 
Published: February 2021

Abstract
As technology develops, dictionaries have changed from paper to electronic. Electronic dictionaries can be an alternative medium for language learning because they combine sound, visuals and text that make learning foreign languages easier. One example of using an electronic dictionary is in reading subjects. Users can learn about how to pronounce a vocabulary and sound tones correctly by utilizing the audio feature in an electronic dictionary. Vocabulary recall through mobile device applications is far more effective than through other media. The electronic dictionary application that is widely used by Chinese Literature students in learning Mandarin is the Pleco and Google Translate application. Therefore, the authors are interested in making comparisons of the similarities and differences between the two applications for the recommendation of Mandarin learning aids. This study uses a comparison method by comparing the functions of the two e-dictionaries. From the results of the comparison, both applications have keyboard features, handwriting features, voice record features and scanning features for translating words. The difference is in the radical features, stroke, number words and sentences sample
Symbol Sense of Mathematics Students in Solving Algebra Problems
Authors: Prasetya Rini Ariati Dwi , Hussen Saddam , Hidayati Herlina , Muttaqien Anwar 
Published: February 2021

Abstract
Symbol sense is a sensibility or mastery of someone against the use of symbols and an understanding of the situation when symbols can be used. This study attempts to describe the extent to which the use of symbol sense students STKIP Muhammadiyah Sampit to solve the algebra problem based on the steps of Polya’s problem-solving. The results showed that understanding the problem step of students in the first semester was still less able to relate the symbol to the problem that given, and the students still used words instead of symbols in understanding the problem. Then the third-semester students have fulfilled all the indicators of symbol sense. Furthermore, fifth-semester students are less precise in writing symbols according to their meaning in the problem. Steps of planning the problem solving all students can use the symbol sense properly. Then in the step of implementing the problem-solving plan, students in the third and fifth semesters can fulfill all the indicators symbol sense to the maximum. However, first semester students bring up or make some new symbols to solve problems. Steps of looking back at the problem solving has been obtained, all students meet all the symbol indicators well. So, the first semester students are still lacking in using their symbol sense in solving algebra problems.
Analysis The Ability of Thinking Abstractly of Mathematics And Self-Efficacy Through Tpack
Authors: Nurhadi Moh. , Darhim  
Published: February 2021

Abstract
The purpose of this study is to analyze the ability of thinking abstractly of mathematics and self-efficacy through TPACK learning. This research is quantitative with survey method and conducted on 7th grade studens. The Data were collected using interview, questionnaire sheets and the ability thinking abstractly of mathematics tests. The results of this study are several indicators of the ability of thinking abstractly of mathematics, found indicators that have been achieved but some of them have not yet been reached as making generalizations. The results of the questionnaire and interview it was concluded that most students still assume that mathematics is difficult to learn and the ability
Analysis of Scour Depth Around Bridge Piers With Round Nose Shape by HEC-RAS 5.0.7 Software
Authors: Silvia C S , Ikhsan M , Wirayuda A , Mastiar  
Published: February 2021

Abstract
Local scour of bridge piers is the main reason for the failure of a hydraulic structure like abutment, bridge piers, etc. Local scours is a complex phenomenon that depends on the discharge, depth of flow, shapes of the pier and distribution of sediment particle. The problems of local scours occurred in Krueng Ineng river, Nagan Raya Regency will cause a structural collapse which has the impact of decreasing the stability of the bridge structure. In this study, the software of Hydrologic Engineering Center River Analysis System (HEC-RAS) 5.0.7 is used to evaluate local scour around the bridge pier which employs the Colorado State University method as a default equation. Flow conditions were simulated using HEC-RAS flow modeling software estimated for 100-year flood. The Results of the analysis with used the peak discharge (Qp100) that occurs in the Krueng Seunagan watershed is 1513m3/sec, pier width of Round Nose shape is 4m, and average grain size analysis D50 and D95 is 0.91mm and 4.35mm, show a maximum scour depth obtained is 5.04m. The results of this study will be a reference for the local government to planning appropriate handling for minimalizing local scours in the study area.
Additionalto Synthetic Fiber On Materials Plastic Injection To Minimize Product Defects
Authors: Azharul Firmansyah , Rahmawati  , Harno  , Wilarso  , Mujiarto  
Published: February 2021

Abstract
Plastic injection molding process in the manufacture of air gun components, namely butt stock gun, and pump handles, product defects are still often found, some of the causes include: burning (burning), lack of material (short shots), and cracking products (cracking), this resulting in not achieving production targets and sales targets. The purpose of this research is to find out the root cause of failure of air gun component products. The method in this problem, plastic injection materials need to be added synthetic fibers to get the visual appearance, tensile strength, modulus of elasticity, and the desired hardness, by utilizing recycled material products. The results showed visually the addition of recycled materials and synthetic fibers did not affect appearance, in economic terms the more recycled materials added the cheaper the cost of material procurement. The addition of recycled material weighing 50% of the original material and 2.5% synthetic fiber from the total amount of material to be processed, is expected to increase the tensile strength, modulus of elasticity and desired hardness. Therefore, this addition of fiber obtains a more accurate comparison of product quality and quantity with a lower product defect rate, and is able to reduce production costs.
Roles Of Quisionary Data To Assess The Vco (Virgin Coconut Oil) Micro Business Performance In The Bojong 3 State, Bojong Village, Panjatan Sub-District, Kulons Progo Regency
Authors: Nur Suhascaryo KRT , Yudiantoro Alp 
Published: February 2021

Abstract
Indonesia is a country that has the largest area of coconut plantations in the world, reaching 3.7 million ha. This is an opportunity for the development of coconuts into various useful products. The Coconut tree is one of the important plantation commodities in the development of plantation sub-sector, among others, to meet domestic needs, as well as export commodities that produce foreign exchange. Virgin coconut oil is a processed product of coconut meat that has many benefits in the form of clear-colored liquid, does not taste with the distinctive smell of coconut. Making this VCO does not require expensive costs, because raw materials are easily obtained at low prices and simple processing. This was made an opportunity by residents of Bojong 3 to earn income by selling processed VCO products. To maximize this VCO micro-enterprise, a questionnaire role is needed to determine how far the readiness of citizens to start a VCO business and develop it becomes larger and has stronger economic resilience.
Growth Analysis of Escherichia coli and Salmonella typhi on MacConkey Agar Modification
Authors: Supriatin Y , Sumirat V A , Herdiani M 
Published: February 2021

Abstract
MacConkey Agar (MCA) is a selective and differential media that is used to isolate and differentiate easily growing Gram-negative bacteria, especially members of the Enterobacteriaceae family. This study aims to obtain MCA modified media. Research has been conducted by inoculating Escherichia coli and Salmonella typhi on MCA media as control and modification of MCA from Nutrient Agar added by bile salts, violet crystals as inhibitors of Gram-positive bacteria, lactose addition to distinguish the properties of bacteria that can ferment lactose and bacteria that cannot ferment lactose, using phenol red as an indicator, the test bacteria were incubated for 24 hours at 37°C and then counted the number of CFU/mL colonies and their lactose fermentation properties were observed. Research results were calculated by the t-test. T-test results showed that there were no differences in the average number of colonies of Escherichia coli and Salmonella typhi in the two media. So it can be concluded that the modified MCA media can be used as a substitute for MCA and show the nature of Lactose Fermenter with a color change from orange to bright yellow because the indicator used is phenol red. So it can be concluded that the MCA modification media can be used as a substitute for MCA.
Antifouling Activity of Cymodecea rotundata and Halodule pinifolia at Pulau Morotai
Authors: Nurafni  , Nur R M , Koroy K , Alwi D , Muhammad S , Eso N 
Published: February 2021

Abstract
Biofouling is the attachment of the organism to the surface of the submerged in water. The presence of a fouling organism causes losses in the form of accelerating damage and adding to the burden of the ship/ boat. The activity of biofouling can be avoided by using environmentally friendly antifouling paint. Some marine organisms, such as mangroves and seagrass, are reported to have antifouling activity. The purpose of this study was to determine the antifouling activity of seagrass C. rotundata and H. pinifolia and to identify bioactive compounds contained in C. rotundata and H. pinifolia. Based on the result of the research, the yield of C. rotundata extract was 5.96% and H. Pinifolia 19.23%. The activity of antifouling H. pinifolia has a minimum concentration of 1000 ppm, while C. rotundata extract is 250 ppm. The results of the identification of bioactive compounds showed that H. pinifolia contains alkaloids, saponins, and steroids, while C. rotundata contains alkaloids.