bluuebunny/crossref_metadata_2025 huggingface dataset:
Collapse of spherical overdensities in superfluid models of dark matter
Authors: Hartman S. T. H. , Winther H. A. , Mota D. F.
Published: May 2020

Aims. We intend to understand cosmological structure formation within the framework of superfluid models of dark matter with finite temperatures. Of particular interest is the evolution of small-scale structures where the pressure and superfluid properties of the dark matter fluid are prominent. We compare the growth of structures in these models with the standard cold dark matter paradigm and non-superfluid dark matter.

Methods. The equations for superfluid hydrodynamics were computed numerically in an expanding ΛCDM background with spherical symmetry; the effect of various superfluid fractions, temperatures, interactions, and masses on the collapse of structures was taken into consideration. We derived the linear perturbation of the superfluid equations, giving further insights into the dynamics of the superfluid collapse.

Results. We found that while a conventional dark matter fluid with self-interactions and finite temperatures experiences a suppression in the growth of structures on smaller scales, as expected due to the presence of pressure terms, a superfluid can collapse much more efficiently than was naively expected due to its ability to suppress the growth of entropy perturbations and thus gradients in the thermal pressure. We also found that the cores of the dark matter halos initially become more superfluid during the collapse, but eventually reach a point where the superfluid fraction falls sharply. The formation of superfluid dark matter halos surrounded by a normal fluid dark matter background is therefore disfavored by the present work.
Scheduling problems with energy consideration: State of the art and opportunities
Authors: Lebbar Ghita , El Abbassi Ikram , Darcherif Moumen , El Barkany Abdellah
Published: May 2020

The target of this study is to find an appropriate research framework on the basis of the main published works designed to resolve the scheduling issues with energy aspect consideration. Relatively, the major part of work is placed in the context when modeling scheduling is subject only to one constraint and criteria, which in reality is not constantly the case. This study is handled in the framework where job transactions are interrupted at the similar time by set of technological, environmental and especially energetic constraints that has been previously little discussed in the literature. As soon as the objective functions, constraints, models, approaches and the scheduling environments that are defined as the fundamental elements of scheduling problems resolution are determined, a literature review of the present state of the art is introduced. Then, an analysis is carried out to highlight the fundamental ideas leading to fix a future research area that still require a huge deal of attention.
CFD based analysis of flow-driven vertical axis hydrokinetic turbines: blade hydrofoil and interactions effects
Authors: Hammoudi Zaid , El Abbassi Ikram , Absi Rafik , Darcherif A.-Moumen
Published: May 2020

In last years, interest in hydrokinetic energy conversion (HEC) technology has grown. However, HEC technology requires advancements to become successful for practical in-situ conditions. In this study we investigated the Darrieus type vertical axis hydrokinetic turbines (HKT). Simulations are carried out using commercial CFD package to study the hydrodynamic behavior of a three bladed turbine. Two HKT with same solidity equal to 0.17 were considered, a 1st with symmetric-NACA0018 blade hydrofoils and a 2nd with cambered-NACA4415 blades. Our simulations show a shift in instantaneous torque coefficients for two different tip-speed ratio (TSR) values. For TSR = 1, the 2nd HKT has a delay compared to the 1st HKT, while for TSR = 2 it has a lead. NACA0018 provides highest troque coefficients. For a hydrofarm use, it is important to consider the interactions between hydrokinetic turbines. We investigated the effect of streamwise distance on performance of a Darrieus turbine. A distance of about 11 times the diameter of HKT along the streamwise direction seems essential.
Tribological investigation on oil blended with Additive using Response surface methodology
Authors: Gadekar Tushar , Kamble Dinesh
Published: May 2020

Friction and wear in dynamic parts is the primary reason for energy loss in gearbox lubrication system and this can be optimized by utilizing modified lubricant. The tribological nature of gearbox system is critically affected by factors such as type of lubricant, loading & speed etc. In latest years, multiple advanced oil and modern tribological techniques & instruments have been utilized to investigate behaviour of oil like pin on disc, Fourball tester etc. This paper presents comparative investigation of oil blended with additive for two different conditions using prediction model & RSM. The design of experimentations has been conducted by using response surface methodology. The value of inputs parameters such as concentration, load & sliding velocity ranges from 0.5 to 5 %, 60 to 100 N and 0.65 to 1.5 m/s, respectively are utilized to evaluate the outcomes of coefficient of friction and specific wear rate. At the end results from Prediction equations are compared with experimental literature based outcomes to signify the effect of parameters like blend %, load & Sliding speed. The Coefficient of friction model showed 47.57 % more closer outcomes as compared to the Specific wear rate model for specific variation of unknown parameters for pin on disc setup in oil.
Design and Fabrication of Solar Powered Vapour Absorption Refrigeration System
Authors: Yadav Varun , Panual G Supradeepa , Yadav Neeraj , Bordia Ratnam , Soni Rohini , Khandey Rinkesh
Published: May 2020

Engineering is all about the application of knowledge and ideas for continuous development in society. In today’s world, there is a strong need for an environment-friendly refrigerating system, therefore, our focus is on a solar powered vapour absorption refrigeration system. This project focuses on a cooling system that minimizes the dependency over electricity and to show our ability to save our resources for future generations. The objective of this work was to design and fabricate a vapour absorption refrigeration system, using LiBr-H20, as the refrigerants and powered by solar energy. Performance Evaluation of the system has been done on the basis of different operating conditions and parameters like, solar irradiance, collector, generator, condenser and evaporator temperature. The COP of the system was obtained as 0.1 and the capacity was 0.01 TR. Since it’s an ab-initio development it will be a unique one in terms of understanding and underlying engineering. The system is an eccentric one that can be operated by multiple heat sources like solar energy, biomass etc. without much change in the design. This system can be used to develop an Air Conditioner, Refrigerator or a Chiller.
Video summarization approaches in wireless capsule endoscopy: A review
Authors: Raut Vrushali , Gunjan Reena
Published: May 2020

Wireless capsule endoscopy (WCE) is medical examination process for gastrointestinal tract (GIT). This noninvasive multi advantageous procedure can be made more popular by overcoming the problem of prolonged analysis time. Video summarization is a concise and meaningful representation of a video. Along with automated detection and segmentation methods, summarized video will serve as an additional source for confirming the analysis of WCE video before the final diagnosis without any dropouts. Nowadays, Internet of Things (IoT) environments are predominant in healthcare sectors. Considering limited resources of smart phones and long duration of WCE process, it is impractical to send all the WCE data to health-care centers or gastroenterologists. This paper reviews video summarization types and the techniques used for WCE video summarization by various researchers. Feature set selection, clustering methods and key frame selection techniques play important role in performance of summarization technique.
Development of Disease Self-Management (DSM) Regulatory, Non-communicable Diseases Negotiable Emerging eHealth driven Food Processing Technologies
Authors: Dagadkhair Amol , Rodge Shradha , Pawar Vasant
Published: May 2020

In the modern food technology digital era, innovation and consumerism driven hypothesis generation plays important role to make the system summarily applicable under information and communication technologies (ICT) domain. eHealth conceptualization and promulgation based on scientific and technological information dissemination, recorded as a need base intervention to update food technology scenario. Nutrition transition leading to goodness and smartness has direct relationship with health of the consumer. Moreover, lifestyle transition generative non-communicable diseases (NCD’s) is becoming a vibrant challenge to food technologists. The sedentary status and individual inactivity jointly invited physio-nutritional health problems like NCD’s world over. Disease self-management (DSM) by eDiet requires hand in hand association of innovative food technology products and processes. eHealth appears to be one stop solution to prevent, cure and stimulate non-recurrence through regulatory dietary pattern. This may also be justify more efficiently with regulatory mechanism of DSM. Food processing being an art of material transition, leading to consumable security, requires to bring it under health claim base food processing scenario. Hence, concerted efforts of eHealth and novel food processing technologies are rightly awaiting to modify the DSM to ensure health security to consumers. The review base focus on tailoring of eHealth and novel food processing technologies is a techno-economical option to develop a regulatory mechanism for negotiation of NCD’s in future generation.
Transforming ‘traditional’ cities into ‘smart’ cities
Authors: Nagaraj Laxmi
Published: May 2020

This paper aims to discuss the challenges of transforming ‘Traditional’ cities to ‘Smart Cities’ and the tools that can be used to transform ‘Traditional’ cities to ‘Smart’ cities in the Indian Context. In this context, this paper discusses the expectations and goals of the Smart City India Mission for the 100 Smart cities, the existing scenario of the ‘Traditional’ cities, the current status of the Smart cities in India and concludes that ‘Traditional’ cities can become ‘Smart’ by developing a base line scenario and developing a ‘Road Map’ to become ‘Smart’. The ‘Road Map’ must consist of the following four stages: Assessment, Vision, Project Plan and Metrics.
Pareto optimal solutions of a wireless power transfer system
Authors: Bertoluzzo Manuele , Forzan Michele , Di Barba Paolo , Mognaschi Maria Evelina , Sieni Elisabetta
Published: May 2020

Electrical vehicles have to be periodically recharged. Currently, they are plugged to power station by cables. Wireless Power Transfer (WPT) Systems could be used instead of traditional cable connection to charge the batteries of electric vehicles. These systems are based on a couple of coils, one on the vehicle bottom and one under the road connected to a power station. Nevertheless, these systems are affected by the magnetic characteristic of the coupling coils, so that these devices should be carefully designed. In this paper, a pair of faced pancake coils equipped with ferrite core is considered. The possible geometries of the coils are designed using genetic optimization algorithms searching for optimal mutual inductance and saving in copper. This paper presents the analysis of the Pareto solutions obtained using automatic design strategy.
Influence of Nb2O5 and basicity on the viscosity and structure of CaO-SiO2-Nb2O5-CeO2-CaF2 slag system
Authors: Ma Zhuang , Zhao Zengwu , Guo Wentao , Wang Zhi
Published: May 2020

In order to utilize niobium concentrate of Bayan Obo effectively, the effect of Nb2O5 and basicity on the viscosity of CaO-SiO2-Nb2O5-5.0 wt.% CeO2-5.0 wt.% CaF2 slag system was studied from 1653 to 1813 K in reducing atmosphere by rotating cylinder method. For the same condition, the as-quenched samples were investigated through X-ray diffraction and Raman spectroscopy. The results show that the viscosity, break temperature and activation energy of viscous flow decrease with the increase of Nb2O5 and basicity. Raman spectra show that the Nb4+ ions exist in the form of [NbO6] octahedron with different distortion and little [NbO4] tetrahedron in the slags. The Nb2O5 addition and basicity lower the degree of polymerization, where the complex Si-O network is depolymerized into simple structural units.
Tuberculosis (T.B.) masquerading as tumor. An 8-year study on 25 cases of long bone tuberculosis presenting as tumors
Authors: Wagh Yash , Reddy Rajeev , Gundavda Manit , Agarwal Manish , Agashe Vikas M , Bajwa Supreet
Published: May 2020

Aim: To highlight radiological features and emphasize the need for tissue diagnoses to confirm bone pathology. Tuberculosis is known to present without constitutional symptoms and with unconventional imaging features mimicking sarcomas as shown in our series of 25 patients; where the imaging and biopsy protocols at our institute helped to solve these diagnostic dilemmas. Material and methods: We retrospectively analyzed clinical and radiological features and tissue diagnoses in 25 patients referred to the department of orthopedic oncology with radiological suspicion of tumor. Results: Only 7 patients had cultures positive for Mycobacterium Tuberculosis T.B. Radiological features suggestive of infection were Metaphyseal and joint involvement, permeative lesions, absence of Codman’s triangle, and soft tissue mass suggestive of a cold abscess. The predictive accuracy of the orthopedic oncologist was 60% and musculoskeletal radiologist was 72% (based on radiology). Final diagnosis is 100% confirmed on histopathology. Conclusion: Diagnosis based primarily upon imaging is a wrong approach. A multimodal approach to differentiating tuberculous bone infections from sarcomas is essential.
Lösungsmöglichkeiten bei fehlgeschlagenen Osteosynthesen – Humerusschaft
Authors: Katthagen J. Christoph , Michel Philipp A. , Schliemann Benedikt , Raschke Michael J.
Published: May 2020

Bei der operativen Therapie von Humerusschaftfrakturen finden sowohl die intramedulläre Nagel- als auch die Plattenosteosynthese regelhaft Anwendung. Für beide Verfahren kann zwischen Früh- und Spätkomplikationen unterschieden werden. Bei der Nagelosteosynthese werden im frühen postoperativen Verlauf häufiger periimplantäre Frakturen etwa am Tuberculum majus oder im Bereich der Fossa olecrani beobachtet. Bei der Plattenosteosynthese hingegen kommt es häufiger zum Repositionsverlust mit sekundärer Dislokation sowie zu Affektionen des Nervus radialis. Pseudarthrosen als klassische Spätfolge zeigen sich häufiger nach der Nagelosteosynthese. Früh- und Spätinfekte im Bereich des Humerusschafts sind insgesamt selten. In der vorliegenden Arbeit werden Lösungsmöglichkeiten bei fehlgeschlagenen Osteosynthesen des Humerusschafts anhand edukativer Fallbeispiele und der aktuellen Literatur dargestellt.
Study of the distribution of different types of cleft lip and palate and associated anomalies
Authors: Barman Alpana , Dutta B C , Sarkar J K
Published: May 2020

Background : Cleft lip and palate are some of the most common congenital deformities. They frequently occur as isolated deformities, but can be associated with other medical conditions and anomalies. Aim of the study: To study the distribution of different types of cleft lip and palate and associated anomalies. Materials and methods: Forty patients of cleft lip and palate were studied. Relevant history was taken, clinical examination done and recorded with photography with consent. The cases were classified as per Nagpur Classification. Results: In our study 24 cases (60%) were cleft lip and palate (type III) and 10 cases (25%) of cleft palate alone (type II) and 6 cases (15%) of cleft lip alone (type I). Males were found to predominate in type I and III. Females predominated in type II. Among the cleft lip, left side is found to be involved in most of the cases. In our study, out of 40 cases, 8 cases (20%) had other associated anomalies. Most of these were associated with cleft lip and palate (type III) and isolated cleft palate (type II). Conclusion: The typical universal distribution of cleft types and associated anomalies tallies with our results.
A Novel Hypomorphic CSF1R Gene Mutation in the Biallelic State Leading to Fatal Childhood Neurodegeneration
Authors: Tamhankar Parag Mohan , Zhu Bin , Tamhankar Vasundhara Parag , Mithbawkar Shilpa , Seabra Luis , Livingston John H. , Ikeuchi Takeshi , Crow Yanick J.
Published: May 2020

We report the clinical and molecular characterization of a novel biallelic mutation in the CSF1R gene leading to an autosomal recessive form of childhood onset leukoencephalopathy in a consanguineous family. The female child experienced acute encephalopathy at the age of 2 years, followed by spasticity and loss of all achieved milestones over 6 months. Her elder brother presented with encephalopathy at 4 years of age, with a subsequent loss of all achieved milestones over 8 months. Brain imaging in both children revealed multiple well-defined areas of calcification in the parietal and frontal regions and the occipital horns of both lateral ventricles. Clinical exome trio analysis showed homozygosity for a p.T833M mutation in CSF1R in the girl. Heterozygous family members, including both parents, were asymptomatic, with the eldest being 68 years of age. Total CSF1R protein expression levels were normal as compared with wild-type allele, but CSF1 ligand dependent autophosphorylation was consistent with a hypomorphic allele.
Microarray-Based Comparative Genomic Hybridization, Multiplex Ligation-Dependent Probe Amplification, and High-Resolution Karyotype for Differential Diagnosis Oculoauriculovertebral Spectrum: A Systematic Review
Authors: Glaeser Andressa Barreto , Diniz Bruna Lixinski , Deconte Desirée , Santos Andressa Schneiders , Rosa Rafael Fabiano Machado , Zen Paulo Ricardo Gazzola
Published: May 2020

Oculoauriculovertebral spectrum (OAVS) is a rare class of heterogenous congenital craniofacial malformation conditions of unknown etiology. Although classic OAVS has been described as hemifacial microsomia with facial asymmetry and microtia, there is no consensus regarding clinical criteria for diagnosis or genetic cause. This systematic review aims to assess the applicability of high-resolution (HR) karyotype, fluorescence in situ hybridization, multiplex ligation-dependent probe amplification (MLPA), and microarray-based comparative genomic hybridization (array-CGH) for differential diagnosis of OAVS. A search was performed in PubMed and Web of Science using all entry terms to the following descriptors: Goldenhar's syndrome, cytogenetic analysis, hybridization in situ, fluorescent, comparative genomic hybridization, multiplex polymerase chain reaction, whole genome sequencing, and karyotype analysis methods. After screening, 25 articles met eligibility. Of the included studies, 59 individuals had a genetic alteration identified. Array-CGH, MLPA, and HR karyotype appear to be viable approaches for molecular diagnosis in OAVS. Heterogeneity is a hallmark of OAVS. Establishing an enhanced framework for diagnosis would inform clinical decision making, and better resource utilization could improve health care facility efficiency and economy.
Skills and motivations underlying children’s cumulative cultural learning: case not closed
Authors: Reindl E. , Gwilliams A. L. , Dean L. G. , Kendal R. L. , Tennie C.
Published: May 2020

The breakthrough study of Dean et al. (Science 335:1114–1118, 2012) claimed that imitation, teaching, and prosociality were crucial for cumulative cultural learning. None of their child participants solved the final stage of their puzzlebox without social support, but it was not directly tested whether the solution was beyond the reach of individual children. We provide this missing asocial control condition, showing that children can reach the final stage of the puzzlebox without social support. We interpret these findings in the light of current understanding of cumulative culture: there are currently conflicting definitions of cumulative culture, which we argue can lead to drastically different interpretations of (these) experimental results. We conclude that the Dean et al. (Science 335:1114–1118, 2012) puzzlebox fulfils a process-focused definition, but does not fulfil the (frequently used) product-focused definition. Accordingly, the precise role of social support for the apparent taxonomic distribution of cumulative culture and its ontogeny warrants further testing.
A class of partition functions associated with E
τ,η
gl3 by Izergin–Korepin analysis
Authors: Motegi Kohei
Published: May 2020

Recently, a class of partition functions associated with higher rank rational and trigonometric integrable models were introduced by Foda and Manabe. We use the dynamical R-matrix of the elliptic quantum group Eτ,η(gl3) to introduce an elliptic analog of the partition functions associated with Eτ,η(gl3). We investigate the partition functions of Foda–Manabe type by developing a nested version of the elliptic Izergin–Korepin analysis and present the explicit forms as symmetrization of multivariable elliptic functions. We show that special cases are essentially the elliptic weight functions introduced in the works by Rimányi, Tarasov, and Varchenko; Konno; and Felder, Rimányi, and Varchenko.
Numerical implementation of boundary element method for determining aerodynamic characteristics around airfoil system by viscous media
Authors: Xu Ke , Yue Peng , Liu Qiang , Liu Chuange , Lu Yiyu , Zhang Jinghui
Published: May 2020

In this paper, the boundary element method is applied to determine the characteristics of distributed flow around the airfoil group. Because the boundary integral equation can describe various initial boundary value problems in mechanics and has many advantages such as good convergence, it can be used as a tool to establish appropriate mathematical models and numerical realization methods, so as to comprehensively study the distribution kinematics and dynamics of the airfoil group motion system in the viscous fluid flow co-flow process. In this paper, some numerical results are presented to determine the aerodynamic distribution characteristics of the viscous flow field around the airfoil group in the control area.
Disorder-induced quantum properties of solid 4He
Authors: Kuklov Anatoly B. , Prokof’ev Nikolay V. , Svistunov Boris V.
Published: May 2020

We briefly discuss theoretical and experimental discoveries in the field of supertransport and plasticity in imperfect solid 4He and argue that these promise new exciting developments. Several experiments aimed at clarifying the origin of the supertransport and its relation to plasticity are proposed. In particular, we argue that “cold-working” protocols of sample preparation should be crucial in this respect.
Acoustic modes in He I and He II in the presence of an alternating electric field
Authors: Tomchenko M. D.
Published: May 2020

The vibrational modes in isotropic nonpolar dielectrics He I and He II are studied in the presence of an alternating electric field E = E0izsin(k0z–ω0t), by solving the equations of ordinary and two-fluid hydrodynamics. There is a “coupling” between the electric field and the density fluctuations, since the density gradient leads to the spontaneous polarization Ps, and the electric force contains the term (Ps∇) E. Analysis shows that the wave velocities of the first- and second-sounds propagating along E change according to the formula uj ≈ cj + χjE02 (where j = 1, 2; cj is the speed of the jth sound at E0 = 0, and χj is a constant). It is found that the field E, together with the wave of the first- (second) sound (ω, k), should create in He II hybrid acoustoelectric (thermoelectric) density waves (ω + lω0, k + lk0), where l = ± 1, ± 2,… The amplitudes of the acoustoelectric waves and the quantity |u1−c1| are negligibly small, but at certain ω and ω0 they should increase resonantly. The first resonance seems to correspond to the decay of a photon into two photons with the recoil momentum being transferred to the liquid as a whole. Therefore, the electromagnetic signal spectrum should have a narrow absorption line, similar to the Mössbauer effect.
Evolution of finite-size phonon beams in superfluid helium
Authors: Vovk R. V. , Nemchenko K. E.
Published: May 2020

The nonlinear stage in the evolution of anisotropic beams of high-energy and low-energy phonons is considered. The beams are interacting systems that are virtually one-dimensional in phase space. The observations and theoretical approaches to the space and time evolution of these systems are analyzed in the general case, when they are bounded in both the longitudinal and transverse directions. As a result, the system of equations for the beam parameters is reduced to a single nonlinear equation that describes both the longitudinal and transverse evolution of the beam. The numerical solution of this equation provides an explanation of the experimentally observed characteristic features of the beam motion and deformation; it also enables the determination of the beams’ main parameters and stages of evolution.
The Berezinskii–Kosterlitz–Thouless topological phase transition in the Josephson medium of granular high-temperature superconductors under the effect of magnetic and electric fields
Authors: Sukhareva T. V. , Finkel V. A.
Published: May 2020

This study establishes the identity of the topological phases that emerge in the Josephson medium of granular high-temperature superconductors YBa2Cu3O7–δ in the process of the Berezinskii–Kosterlitz–Thouless (BKT) phase transitions, under the influence of an external magnetic field and transport current. The nature of the topological phases arising as a result of the BKT phase transition was found to be independent of the type of external effect.
A Georgian Language Island in Iran: Fereydani Georgian
Authors: Bakuradze Lia , Beridze Marina , Pourtskhvanidze Zakharia
Published: May 2020

This article describes a dialectal variant of the Georgian language in Iran, Fereydani Georgian, which has survived in Iran for about 400 years. Various relevant aspects of the history and research on Fereydani Georgian are analysed. The choice of topics and sources focuses on previously unknown or, for the English-speaking reader, inaccessible authors. Since 2009, a large part of the linguistic data has been collected in several field studies in Fereydan. They serve as sources and show a revealing perspective on the origin, preservation and existence of the Georgian language island of Fereydani in Iran.
Changes in lactic acid bacteria and components of Awa-bancha by anaerobic fermentation
Authors: Nishioka Hiroki , Mizuno Tomofumi , Iwahashi Hitoshi , Horie Masanori
Published: May 2020

Awa-bancha is a post-fermented tea produced in Naka and Kamikatsu, Tokushima, Japan. We investigated the lactic acid bacteria in each stage of production of Awa-bancha and evaluated the relationships with the components. Lactic acid bacteria were isolated from tea leaves cultured with de Man, Rogosa, and Sharpe (MRS) agar plates, and the species were identified by homology of the 16 S rRNA gene and multiplex polymerase chain reaction (PCR) of the recA gene to distinguish the Lactobacillus plantarum group. As a result, a variety of species were isolated from the raw tea leaves, and Lactobacillus pentosus was isolated most frequently after anaerobic fermentation. Regarding the tea leaf components, organic acids, such as lactic acid, increased, free amino acids decreased, and catechins changed owing to anaerobic fermentation. Our results suggest that the microbial flora mainly composed of L. pentosus is important in the anaerobic fermentation process for flavor formation of Awa-bancha.
Simulation of anyons by cold atoms with induced electric dipole moment*
Authors: Jing Jian , Ma Yao-Yao , Zhang Qiu-Yue , Wang Qing , Dong Shi-Hai
Published: May 2020

We show that it is possible to simulate an anyon by a trapped atom which possesses an induced electric dipole moment in the background of electric and magnetic fields in a specific configuration. The electric and magnetic fields we applied contain a magnetic and two electric fields. We find that when the atom is cooled down to the limit of the negligibly small kinetic energy, the atom behaves like an anyon because its angular momentum takes fractional values. The fractional part of the angular momentum is determined by both the magnetic and one of the electric fields. Roles electric and magnetic fields played are analyzed.
Photoresponsive characteristics of thin film transistors with perovskite quantum dots embedded amorphous InGaZnO channels*
Authors: Zhang Mei-Na , Shao Yan , Wang Xiao-Lin , Wu Xiaohan , Liu Wen-Jun , Ding Shi-Jin
Published: May 2020

Photodetectors based on amorphous InGaZnO (a-IGZO) thin film transistor (TFT) and halide perovskites have attracted attention in recent years. However, such a stack assembly of a halide perovskite layer/an a-IGZO channel, even with an organic semiconductor film inserted between them, easily has a very limited photoresponsivity. In this article, we investigate photoresponsive characteristics of TFTs by using CsPbX
3 (X = Br or I) quantum dots (QDs) embedded into the a-IGZO channel, and attain a high photoresponsivity over 103A⋅W−1, an excellent detectivity in the order of 1016 Jones, and a light-to-dark current ratio up to 105 under visible lights. This should be mainly attributed to the improved transfer efficiency of photoelectrons from the QDs to the a-IGZO channel. Moreover, spectrally selective photodetection is demonstrated by introducing halide perovskite QDs with different bandgaps. Thus, this work provides a novel strategy of device structure optimization for significantly improving the photoresponsive characteristics of TFT photodetectors.
First principles calculations on the thermoelectric properties of bulk Au2S with ultra-low lattice thermal conductivity*
Authors: Wu Y Y , Zhu X L , Yang H Y , Wang Z G , Li Y H , Wang B T
Published: May 2020

Sulfide nanocrystals and their composites have shown great potential in the thermoelectric (TE) field due to their extremely low thermal conductivity. Recently a solid and hollow metastable Au2S nanocrystalline has been successfully synthesized. Herein, we study the TE properties of this bulk Au2S by first-principles calculations and semiclassical Boltzmann transport theory, which provides the basis for its further experimental studies. Our results indicate that the highly twofold degeneracy of the bands appears at the Γ point in the Brillouin zone, resulting in a high Seebeck coefficient. Besides, Au2S exhibits an ultra-low lattice thermal conductivity (∼ 0.88 W⋅m−1⋅K−1 at 700 K). At 700 K, the thermoelectric figure of merit of the optimal p-type doping is close to 1.76, which is higher than 0.8 of ZrSb at 700 K and 1.4 of PtTe at 750 K. Our work clearly demonstrates the advantages of Au2S as a TE material and would greatly inspire further experimental studies and verifications.
Discontinuous transition between Zundel and Eigen for

H5O2+

*
Authors: Wang Endong , Zhu Beien , Gao Yi
Published: May 2020

The hydrated-proton structure is critical for understanding the proton transport in water. However, whether the hydrated proton adopts Zundel or Eigen structure in solution has been highly debated in the past several decades. Current experimental techniques cannot directly visualize the dynamic structures in situ, while the available theoretical results on the infrared (IR) spectrum derived from current configurational models cannot fully reproduce the experimental results and thus are unable to provide their precise structures. In this work, using

H
5

O
2
+

as a model, we performed first-principles calculations to demonstrate that both the structural feature and the IR frequency of proton stretching, characteristics to discern the Zundel or Eigen structures, evolve discontinuously with the change of the O–O distance. A simple formula was introduced to discriminate the Zundel, Zundel-like, and Eigen-like structures. This work arouses new perspectives to understand the proton hydration in water.
High crystalline quality of SiGe fin fabrication with Si-rich composition area using replacement fin processing*
Authors: Zan Ying , Li Yong-Liang , Cheng Xiao-Hong , Zhao Zhi-Qian , Liu Hao-Yan , Hu Zhen-Hua , Du An-Yan , Wang Wen-Wu
Published: May 2020

A high crystalline quality of SiGe fin with an Si-rich composition area using the replacement fin processing is systematically demonstrated in this paper. The fin replacement process based on a standard FinFET process is developed. A width of less than 20-nm SiGe fin without obvious defect impact both in the direction across the fin and in the direction along the fin is verified by using the high angle annular dark field scanning transmission electron microscopy and the scanning moiré fringe imaging technique. Moreover, the SiGe composition is inhomogenous in the width of the fin. This is induced by the formation of {111} facets. Due to the atomic density of the {111} facets being higher, the epitaxial growth in the direction perpendicular to these facets is slower than in the direction perpendicular to {001}. The Ge incorporation is then higher on the {111} facets than on the {001} facets. So, an Si-rich area is observed in the central area and on the bottom of SiGe fin.
Silicon-based optoelectronic synaptic devices*
Authors: Yin Lei , Pi Xiaodong , Yang Deren
Published: May 2020

High-performance neuromorphic computing (i.e., brain-like computing) is envisioned to seriously demand optoelectronically integrated artificial neural networks (ANNs) in the future. Optoelectronic synaptic devices are critical building blocks for optoelectronically integrated ANNs. For the large-scale deployment of high-performance neuromorphic computing in the future, it would be advantageous to fabricate optoelectronic synaptic devices by using advanced silicon (Si) technologies. This calls for the development of Si-based optoelectronic synaptic devices. In this work we review the use of Si materials to make optoelectronic synaptic devices, which have either two-terminal or three-terminal structures. A series of important synaptic functionalities have been well mimicked by using these Si-based optoelectronic synaptic devices. We also present the outlook of using Si materials for optoelectronic synaptic devices.
Investigation of dimensionality in superconducting NbN thin film samples with different thicknesses and NbTiN meander nanowire samples by measuring the upper critical field*
Authors: Nazir Mudassar , Yang Xiaoyan , Tian Huanfang , Song Pengtao , Wang Zhan , Xiang Zhongcheng , Guo Xueyi , Jin Yirong , You Lixing , Zheng Dongning
Published: May 2020

We study superconducting properties of NbN thin film samples with different thicknesses and an ultra-thin NbTiN meander nanowire sample. For the ultra-thin samples, we found that the temperature dependence of upper critical field (H
c2) in parallel to surface orientation shows bending curvature close to critical temperature T
c, suggesting a two-dimensional (2D) nature of the samples. The 2D behavior is further supported by the angular dependence measurements of H
c2 for the thinnest samples. The temperature dependence of parallel upper critical field for the thick films could be described by a model based on the anisotropic Ginzburg–Landau theory. Interestingly, the results measured in the field perpendicular to the film surface orientation show a similar bending curvature but in a much narrow temperature region close to T
c for the ultra-thin samples. We suggest that this feature could be due to suppression of pair-breaking caused by local in-homogeneity. We further propose the temperature dependence of perpendicular H
c2 as a measure of uniformity of superconducting ultra-thin films. For the thick samples, we find that H
c2 shows maxima for both parallel and perpendicular orientations. The H
c2 peak for the perpendicular orientation is believed to be due to the columnar structure formed during the growth of the thick films. The presence of columnar structure is confirmed by transmission electron microscopy (TEM). In addition, we have measured the angular dependence of magneto-resistance, and the results are consistent with the H
c2 data.
Petri Net Model and Max-Plus Algebra on Queue in Clinic UNS Medical Center
Authors: Sulistyaningsih T. , Siswanto  , Pangadi
Published: May 2020

Patients come to the clinic UNS (Universitas Sebelas Maret) Medical Center to get a medical treatment. The clinic provides two health services include dental polyclinics and general polyclinics. Majority of patients do not know exactly how long the process of service from patient registration to getting medicine. Moving queues to each service is an event and people who queue up at each service are state. It is clear that the sum of all possible states is finite. This problem includes a Discrete Event System (DES). One of the uses of petri net is to model a DES. In this research, service flow was built in the clinic using Petri Net and service scheduling was modeled using Max-Plus Algebra. Furthermore, a coverability tree was built to determine the liveness and deadlock of the patient service queue and analyze the petri net flow. The selection of service start time can be chosen randomly to simulate the scheduling and length of service time.
Numerical comparisons based on new NCP-functions
Authors: Nurhidayat I , Han L C
Published: May 2020

We consider studying numerical comparisons based on variants of new NCP-functions denoted by

ϕ
k
p

. The nonlinear programming (NLP) can be converted to nonlinear complementarity problem (NCP) by employing the Karush-Kuhn Tucker (KKT) optimality conditions. One of the most popular ways to solve NCP is Lagrangian globalization (LG) method by transforming NCP as a system of nonsmooth (semismooth) equations. The second one is a novel method named the fictitious time integration method (FTIM). We reformulate NCP as a system of nonlinear algebraic equations (NAEs) and then construct an ordinary differential equation (ODE) by utilizing time-like functions. A group preserving scheme (GPS) is a set of ODEs which is a tool for systematically reformulating into the nonlinear dynamical system (NDS). Afterward, the NDS can be manipulated to numerical equations through activating the Lorentz group SO
0(n, 1) and its Lie algebra SO
0(n, 1). The FTIM will be operated on this numerical equation in numerical simulations for getting approximation solutions. All of the numerical experiments are carried out in performance profile theories. The comparisons of new NCP-functions by utilizing FTIM and LG method will be discussed in numerical experiments. Lastly, an accurate test of both FTIM and LG method is going to be committed by performance profile concepts as well.
Ant System Algorithm in Renewing Pheromone for Completing Quadratic Assignment Problem
Authors: Utami F M , Renny  , Nurshiami S R
Published: May 2020

Quadratic Assignment Problem (QAP) is often encountered with facility layout issues. Facility layout is a matter of assigning n facilities to n locations to minimize the total cost of the assignment. The QAP application examined in this research is the layout of the production facilities at PT. Slamet Langgeng. The search for QAP solutions uses the Ant System algorithm by examining three pheromone update algorithms, namely the Ant Cycle, Ant Density, and Ant Quantity algorithms. The simulation of the three algorithms in the completion of QAP uses the help of Matlab 7.0.4 software. Based on the results of the QAP completion simulation, the best QAP solution offered by the Ant Cycle, Ant Density, and Ant Quantity algorithms produce different minimum distances. The best QAP solution with the smallest minimum distance is offered by the Ant Cycle algorithm of 4,967.2 m for 1,000 iterations. The QAP solution has the same minimum distance with an optimal distance of 4,967.2 m so that the layout of the production facilities at PT. Slamet Langgeng in 2019 is optimal in terms of the distance of labor between production processes. The Ant Density algorithm produces the best QAP solution of 5,271.4 m for 2,000 iterations. The Ant Quantity algorithm produces the best QAP solution of 5,471.6 m for 500 iterations.
Annihilator graph of semiring of matrices over Boolean semiring
Authors: Yudatama R , Kurniawan V Y , Wiyono S B
Published: May 2020

The annihilator graph of a semiring S, denoted by AG(S), is the graph whose vertex set is the set of all nonzero zero-divisors of S. In commutative semiring S, two distinct vertices are adjacent if and only if ann(xy) ≠ ann(x) ∪ ann(y), where ann(x) = {s ∈ S|sx = 0}. Similarly in noncommutative semiring S, two distinct vertices are connected by an edge if and only if either l. ann(xy) ≠ l. ann(x) ∪ l. ann(y), l. ann(yx) ≠ l. ann(x) ∪ l. ann(y), r. ann(xy) ≠ r. ann(x) ∪ r. ann(y), or r. ann(yx) ≠ r. ann(x) ∪ r. ann(y) where l. ann(x) = {s ∈ S|sx = 0} and r. ann(x) = {s ∈ S|xs = 0}. In this paper we study the properties of the right annihilator and the left annihilator of semiring of matrices over Boolean semiring Mn
(ℬ) and then use these results to determine the diameter of the graph AG(Mn
(ℬ)).
Interval min-plus algebraic structure and matrices over interval min-plus algebra
Authors: Awallia A R , Siswanto  , Kurniawan V Y
Published: May 2020

Max-plus algebra is the set

ℝ

max

or

ℝ
ε

=
ℝ
∪
{
ε
}

where

ℝ

is the set of all real number and ε = −∞ which is equipped with maximum (⊕) and plus (⊗) operations. The structure of max-plus algebra is semifield. Another semifield that can be learned is min-plus algebra. Min-plus algebra is the set

ℝ

min

or

ℝ

ε
′

=
ℝ
∪
{
ε
′
}

where ε′ = ∞ which is equipped with minimum (⊕ ′) and plus (⊗) operations. Max-plus algebra has been generalized into interval max-plus algebra, so that min-plus algebra can be developed into an interval min-plus algebra. Interval min-plus algebra is defined as a set

I
(
ℝ
)

ε
′

=
{
x
=
[

x
_

,

x
¯

]
|

x
_

,

x
¯

∈
ℝ
,

x
_

≤

x
¯

<

ε
′

}

which have minimum

(

⊕
¯

′

)

and addition

(

⊗
¯

)

operations. A matrix in which its components are the element of

ℝ
ε

is called matrix over max-plus algebra. Matrices over max-plus algebra has been generalized into interval matrices in which its components are the element of

I

(
ℝ
)

ε

. This research will discusses the interval min-plus algebraic structure and matrices over interval min-plus algebra.
Implementation of Bayesian Mixture Models in identifying subpopulation of breast cancer patients based on blood test measurements
Authors: Dwimantara N , Abdullah S , Bustamam A , Rachman A
Published: May 2020

A complete blood test is one of a series of initial examinations of cancer patients that is relatively easy. The use of blood measurement components in analysing patient conditions is commonly used. However, it is not the case for the ratio and inter-ratio components of blood measurements, and this is what is proposed in this study. The built hypothesis is that the ratio and inter-ratio components of blood tests that can explain the condition of cancer patients are better than the blood test’s own components. An analysis will also be conducted to develop a patient profile based on these measurements, and those that can clearly distinguish between patient groups will be identified. The Finite Mixture Model is a method for modelling heterogeneous data that may originate from different subpopulations, where subpopulations represent groups of patients based on a particular latent condition. This model takes the form of a superposition of several distributions, which in this study, a Gaussian distribution is used. The parameter estimation used in the Bayesian method, which determines the prior distribution of the model parameters, and it is combined with the likelihood which will produce a posterior distribution. Then, the Markov Chain Monte Carlo-Gibbs Sampler is used to draw samples on the parameters of the posterior distribution. By using the breast cancer patient blood test data from the Oncology Department of a hospital in Jakarta, with 100,000 iterations as burn-in, and 200,000 iterations for sampling, based on Deviance Information Criterion values, the optimal grouping is two subpopulations using blood ratio and inter-ratio measurements. Two subpopulations were identified, with the first population is characterized by low distribution value and the second subpopulation with the opposite characteristics. The explanatory factors of ratio data are ratio neutrophils to lymphocytes, ratio platelets to lymphocytes, and ratio lymphocytes to monocytes.
Determining soil fertility using principal componen regression analysis of oil palm plantation in West Sulawesi, Indonesia
Authors: Pasaribu U S , Nurhayati N , Ilmi N F F , Sari K N
Published: May 2020

Palm oil is one of the most popular vegetable oils in the world besides soybean oil. Nowadays, more than 80% of the world’s palm oil supply comes from Indonesia and Malaysia. As the largest supplier, Indonesia must be improved and maintained its productivity with good management, such as maintaining soil fertilization to produce the best oil palm. This activity requires analysis of the soil chemical factors and soil conditions (fertile or not) from oil palm plantations, which involves a large amount of data. Principal component regression is an appropriate statistical method to solve the problem. In this method, the coefficient of the regression model is the coefficient of the principal components (PCs). Dimension reduction is performed on the predictor variables that have a high correlation so that the PCs have an insignificant correlation. The data are obtained by measuring soil samples around the trees from oil palm plantation in West Sulawesi, Indonesia. The data consist of sixteen variables and thirty-six observations (0-20 cm) for each variable. There are three PCs that become predictors of the regression model with information absorption rates reaching 78%, i.e., some macronutrients (Potassium oxide, Potassium, Calcium, and Cation exchange capacity), soil acidity and organic properties (Carbon and Nitrogen). Furthermore, the accuracy of the estimation value in this logistic regression model reaches 90% by using stepwise backward method.
Half-space model problem for a compressible fluid model of Korteweg type with slip boundary condition
Authors: Inna Suma , Maryani Sri , Saito Hirokazu
Published: May 2020

In this paper, we consider a half-space model problem for a compressible fluid model of Korteweg type with slip boundary condition and prove the existence of ℛ-bounded solution operator families for the model problem.
The metric dimension of k-subdivision graphs
Authors: Susilowati L , Zahidah S , Nastiti R D , Utoyo M I
Published: May 2020

The concept of metric dimension of graph could be applied in many graphs, one of them is subdivision graph. A subdivision graph of graph G denoted as S(G) is a graph resulting from graph G by replacing an edge uv with a new vertex w and adding two new edges uw and wv. In this paper, the subdivision graph is called k − subdivision denoted by Sk
(G), if the number of edges replaced from graph G is k for 1 ≤ k ≤ |E(G)|, where |E(G)| is the size of graph G. The purpose of this research is to find the metric dimension of subdivision graphs Sk
(G), specifically for some special graphs, those are path graph (Pn
), cycle graph (Cn
), complete graph (Kn
), star graph (Sn
), ladder graph (Ln
), book graph (Bn
), wheel graph (Wn
) and fan graph (Fn
).