bluuebunny/crossref_metadata_2025 huggingface dataset:
Application of a Non-Dominated Sorting Genetic Algorithm to Solve a Bi-Objective Scheduling Problem Regarding Printed Circuit Boards
Authors: Chang Yung-Chia , Chang Kuei-Hu , Zheng Ching-Ping
Published: July 2022

An unrelated parallel machine scheduling problem motivated by the scheduling of a printed circuit board assembly (PCBA) under surface mount technology (SMT) is discussed in this paper. This problem involved machine eligibility restrictions, sequence-dependent setup times, precedence constraints, unequal job release times, and constraints of shared resources with the objectives of minimizing the makespan and the total job tardiness. Since this scheduling problem is NP-hard, a mathematical model was first built to describe the problem, and a heuristic approach using a non-dominated sorting genetic algorithm (NSGA-II) was then designed to solve this bi-objective problem. Multiple near-optimal solutions were provided using the Pareto front solution and crowding distance concepts. To demonstrate the efficiency and effectiveness of the proposed approach, this study first tested the proposed approach by solving test problems on a smaller scale. It was found that the proposed approach could obtain optimal solutions for small test problems. A real set of work orders and production data was provided by a famous hardware manufacturer in Taiwan. The solutions suggested by the proposed approach were provided using Gantt charts to visually assist production planners to make decisions. It was found that the proposed approach could not only successfully improve the planning time but also provide several feasible schedules with equivalent performance for production planners to choose from.
Improvement of Some Hayashi–Ostrowski Type Inequalities with Applications in a Probability Setting
Authors: Alomari Mohammad W. , Chesneau Christophe , Leiva Víctor , Martin-Barreiro Carlos
Published: July 2022

Different types of mathematical inequalities have been largely analyzed and employed. In this paper, we introduce improvements to some Ostrowski type inequalities and present their corresponding proofs. The presented proofs are based on applying the celebrated Hayashi inequality to certain functions. We provide examples that show these improvements. Illustrations of the obtained results are stated in a probability framework.
An Improved Reptile Search Algorithm Based on Lévy Flight and Interactive Crossover Strategy to Engineering Application
Authors: Huang Liqiong , Wang Yuanyuan , Guo Yuxuan , Hu Gang
Published: July 2022

In this paper, we propose a reptile search algorithm based on Lévy flight and interactive crossover strategy (LICRSA), and the improved algorithm is employed to improve the problems of poor convergence accuracy and slow iteration speed of the reptile search algorithm. First, the proposed algorithm increases the variety and flexibility of the people by introducing the Lévy flight strategy to prevent premature convergence and improve the robustness of the population. Secondly, an iteration-based interactive crossover strategy is proposed, inspired by the crossover operator and the difference operator. This strategy is applied to the reptile search algorithm (RSA), and the convergence accuracy of the algorithm is significantly improved. Finally, the improved algorithm is extensively tested using 2 test sets: 23 benchmark test functions and 10 CEC2020 functions, and 5 complex mechanical engineering optimization problems. The numerical results show that LICRSA outperforms RSA in 15 (65%) and 10 (100%) of the 2 test sets, respectively. In addition, LICRSA performs best in 10 (43%) and 4 (40%) among all algorithms. Meanwhile, the enhanced algorithm shows superiority and stability in handling engineering optimization.
A Novel Inverse Time–Frequency Domain Approach to Identify Random Forces
Authors: Jia You , Li Ruikai , Fan Yanhong , Huang Haijie
Published: July 2022

In order to ensure the reliability and safety of complex engineering structures and allow their redesign and evaluation, the estimation of dynamic loads applied on them is vital. In this paper, a novel time–frequency domain approach is proposed to identify random forces based on the weighted regularization algorithm. Firstly, the Newmark’s algorithm was applied to obtain structural dynamic responses, then a weighed regularization algorithm was used to identify the random forces exerted on the engineering structure. The weighting matrix was used to control the identified error of the random forces. A spatial frame model was built to illustrate the practicality of the proposed approach. The experimental results demonstrated that the proposed method is more effective than other methods for random forces identification.
Patterning SS304 Surface at Microscale to Reduce Wettability and Corrosion in Saline Water
Authors: Annakodi Vivek Anand , Arvind Singh Ramachandra , Jayalakshmi Subramanian , Zhang Yupeng , Anaz Khan Muhammed , Srinivas Rao Koppula , Shabadi Rajashekhara
Published: July 2022

Stainless steel 304 (SS304) experiences corrosion when it is exposed to a saline atmosphere, which attains severity due to its high surface wettability. Topographical modification of metallic surfaces is an effective route to reduce wettability and thereby mitigate liquid-mediated corrosion. In this work, topographical modification of stainless steel 304 flat surface in the form of micropillars was done (pillar width: 100 μm, inter-pillar distance: 100 μm and height: 80 μm). Micropillars were fabricated by a chemical etching process. Wetting and corrosion of the micropillars was studied over long-time duration in comparison with flat surface, before and after intermittent and continuous exposures to saline water for 168 h. Wetting was characterized by measuring the static water contact angle on the test surfaces and their corrosion by electrochemical polarization tests (electrolyte: 3.5 wt.% sodium chloride solution). The relationship between the nature of wetting of the test surfaces and their corrosion was examined. Micropillars showed predominantly composite wetting over a long time, which imparted an effective resistance against corrosion over a long time to the SS304 surface. When compared to the flat surface, the corrosion rates of the micropillars were lower by two orders of magnitude, prior to and also upon long-time contact with the NaCl solution. Micropillars lowered corrosion due to composite wetting, i.e., solid-liquid-air interface that reduced the area that was in contact with the NaCl solution. The efficiency of corrosion inhibition (η) of micropillars was 88% before long-time contact, 84% after intermittent contact, and 77% after continuous contact with NaCl solution. Topographical modification in the form of micropillars that can impart composite wetting is an effective route to induce long-term anticorrosion ability to the SS304 surface.
Arc Characteristics and Welding Process of Laser K-TIG Hybrid Welding
Authors: Zhang Hongchang , Yu Jiang , Zhang Zixiao , Gao Jianguo , Su Zhaofang , Sun Zhaorong , Li Yinan
Published: July 2022

The Q235 steel plate butt joint was successfully welded by the laser K-TIG hybrid welding method. The effects of hybrid welding process parameters such as welding current, the distance between heat sources, laser power, laser defocusing amount, and welding speed on the coupled arc profile and welding process stability were studied. The results indicated that the laser deflects the K-TIG arc, and the deflection angle becomes smaller as the arc current increases. After K-TIG generates small holes, if the laser beam acts on the bottom of the keyhole, the welded depth can be further increased; however, the laser power has little effect on the welded depth. The distance between heat sources is the main factor affecting the state of laser-arc coupling. Optical microstructures of welded joints showed that the grains in the arc zone were coarser than those in the laser zone, and there are more columnar crystals in the fusion zone. The microhardness of the weld center is significantly higher than that of the base metal, up to 220 HV. At the same time, the change of tensile strength of the weld under the influence of a single parameter was analyzed, and it was found that tensile properties of the weld first increased and then decreased with the increase of K-TIG arc current I, heat source distance D, and welding speed V, respectively. With the increase of laser power P, it first decreased and then increased, and with the increase of laser defocusing amount δf, it showed a downward trend.
Bioavailability of Reduced Coenzyme Q10 (Ubiquinol-10) in Burn Patients
Authors: Kuriyama Naohide , Nakamura Tomoyuki , Nakazawa Harumasa , Wen Tyler , Berra Lorenzo , Bittner Edward A. , Goverman Jeremy , Kaneki Masao
Published: July 2022

Mitochondrial dysfunction has been implicated in the pathogenesis of inflammation and multi-organ dysfunction in major trauma, including burn injury. Coenzyme Q10 (CoQ10) is a metabolite of the mevalonate pathway and an essential cofactor for the electron transport in the mitochondria. In addition, its reduced form (ubiquinol) functions as an antioxidant. Little is known as to whether oral CoQ10 supplementation effectively increases intracellular CoQ10 levels in humans. To study the bioavailability of CoQ10 supplementation, we conducted a randomized, double-blind, placebo-controlled study of reduced CoQ10 (ubiquinol-10) (1800 mg/day, t.i.d.) in burn patients at a single, tertiary-care hospital. Baseline plasma CoQ10 levels were significantly lower in burn patients than in healthy volunteers, although plasma CoQ10/cholesterol ratio did not differ between the groups. CoQ10 supplementation increased plasma concentrations of total and reduced CoQ10 and total CoQ10 content in peripheral blood mononuclear cells (PBMCs) in burn patients compared with the placebo group. CoQ10 supplementation did not significantly change circulating levels of mitochondrial DNA, inflammatory markers (e.g., interleukins, TNF-α, IFN-γ), or Sequential Organ Failure Assessment (SOFA) scores compared with the placebo group. This study showed that a relatively high dose of reduced CoQ10 supplementation increased the intracellular CoQ10 content in PBMCs as well as plasma concentrations in burn patients.
Comparative Metabolite Profiling and Fingerprinting of Medicinal Cinnamon Bark and Its Commercial Preparations via a Multiplex Approach of GC–MS, UV, and NMR Techniques
Authors: Farag Mohamed A. , Khaled Sally E. , El Gingeehy Zeina , Shamma Samir Nabhan , Zayed Ahmed
Published: July 2022

Various species of cinnamon (Cinnamomum sp.) are consumed as traditional medicine and popular spice worldwide. The current research aimed to provide the first comparative metabolomics study in nine cinnamon drugs and their different commercial preparations based on three analytical platforms, i.e., solid-phase microextraction coupled to gas chromatography–mass spectrometry method (SPME/GC–MS), nuclear magnetic resonance (NMR), and ultraviolet-visible spectrophotometry (UV/Vis) targeting its metabolome. SPME/GC–MS of cinnamon aroma compounds showed a total of 126 peaks, where (E)-cinnamaldehyde was the major volatile detected at 4.2–60.9% and 6.3–64.5% in authenticated and commercial preparations, respectively. Asides, modeling of the GC/MS dataset could relate the commercial products CP-1 and CP-3 to C. cassia attributed to their higher coumarin and low (E)-cinnamaldehyde content. In contrast, NMR fingerprinting identified (E)-methoxy cinnamaldehyde and coumarin as alternative markers for C. verum and C. iners, respectively. Additionally, quantitative NMR (qNMR) standardized cinnamon extracts based on major metabolites. UV/Vis showed to be of low discrimination power, but its orthogonal projections to latent structures discriminant analysis (OPLS-DA) S-plot showed that C. iners was more abundant in cinnamic acid compared to other samples. Results of this study provide potential insights into cinnamon drugs QC analysis and identify alternative markers for their discrimination.
Sharing Vitamin B12 between Bacteria and Microalgae Does Not Systematically Occur: Case Study of the Haptophyte Tisochrysis lutea
Authors: Nef Charlotte , Dittami Simon , Kaas Raymond , Briand Enora , Noël Cyril , Mairet Francis , Garnier Matthieu
Published: July 2022

Haptophyte microalgae are key contributors to microbial communities in many environments. It has been proposed recently that members of this group would be virtually all dependent on vitamin B12 (cobalamin), an enzymatic cofactor produced only by some bacteria and archaea. Here, we examined the processes of vitamin B12 acquisition by haptophytes. We tested whether co-cultivating the model species Tisochrysis lutea with B12-producing bacteria in vitamin-deprived conditions would allow the microalga to overcome B12 deprivation. While T. lutea can grow by scavenging vitamin B12 from bacterial extracts, co-culture experiments showed that the algae did not receive B12 from its associated bacteria, despite bacteria/algae ratios supposedly being sufficient to allow enough vitamin production. Since other studies reported mutualistic algae–bacteria interactions for cobalamin, these results question the specificity of such associations. Finally, cultivating T. lutea with a complex bacterial consortium in the absence of the vitamin partially rescued its growth, highlighting the importance of microbial interactions and diversity. This work suggests that direct sharing of vitamin B12 is specific to each species pair and that algae in complex natural communities can acquire it indirectly by other mechanisms (e.g., after bacterial lysis).
A Natural Vanadate–Arsenate Isomorphous Series with Jeffbenite-Type Structure: New Fumarolic Minerals Udinaite, NaMg4(VO4)3, and Arsenudinaite, NaMg4(AsO4)3
Authors: Pekov Igor V. , Koshlyakova Natalia N. , Zubkova Natalia V. , Belakovskiy Dmitry I. , Vigasina Marina F. , Agakhanov Atali A. , Ksenofontov Dmitry A. , Turchkova Anna G. , Britvin Sergey N. , Sidorov Evgeny G. , Pushcharovsky Dmitry Yu.
Published: July 2022

Two new isostructural minerals udinaite and arsenudinaite with the end-member formulae NaMg4(VO4)3 and NaMg4(AsO4)3, respectively, are found in the Arsenatnaya fumarole, Tolbachik volcano, Kamchatka, Russia. They are associated with one another and anhydrite, diopside, hematite, schäferite, berzeliite, svabite, calciojohillerite, tilasite, reznitskyite, ludwigite, rhabdoborite-group borates, forsterite, magnesioferrite, fluorapatite, pliniusite, and powellite. Both minerals occur as equant tetragonal prismatic–dipyramidal crystals up to 0.15 mm, aggregates up to 1 cm and interrupted crusts up to 2 × 2 cm2. Udinaite and arsenudinaite, visually indistinguishable from one another, are transparent, beige or brownish-yellowish, with vitreous lustre. Both minerals are optically uniaxial (–); ω = 1.785/1.777 and ε = 1.830/1.820, Dcalc. = 3.613/3.816 g·cm−3 (udinaite/arsenudinaite). The empirical formulae are: udinaite: (Na0.55Ca0.16)Σ0.71(Mg4.04Mn0.02Fe0.01)Σ4.07(V1.63As1.05P0.28Si0.03S0.01)Σ3.00O12; arsenudinaite: (Na0.57Ca0.13)Σ0.70(Mg4.01Mn0.01Fe0.01)Σ4.03(As2.07V0.84P0.10Si0.01S0.01)Σ3.03O12. Both minerals are tetragonal, I-42d, Z = 4, a = 6.8011(2)/6.8022(1), c = 19.1839(12)/19.1843(6) Å, and V = 887.35(7)/887.66(4) Å3, R1 = 0.0287/0.0119 (udinaite/arsenudinaite). Their crystal structure consists of the helical chains of edge-sharing MgO6 octahedra and isolated TO4 tetrahedra, forming a heteropolyhedral pseudo-framework with Na cations located in cavities. Both minerals are isostructural to jeffbenite. Udinaite and arsenudinaite form an isomorphous series in which the contents of T constituents vary within (in apfu): V1.6–0.1As2.8–1.0P0.4–0.0.
A Dynamic Coupled Elastoplastic Damage Model for Rock-like Materials Considering Tension-Compression Damage and Pressure-Dependent Behavior
Authors: Hu Xuelong , Zhang Ming , Xu Wenyao , Tu Min , Yin Zhiqiang , Zhang Xiangyang
Published: July 2022

A dynamic coupled elastoplastic damage model for rock-like materials is proposed. The model takes unified strength theory as the strength criterion. To characterize the different damage between compression and tension, two damage variables both in compression and in tension are introduced into the model. The former is represented by the generalized shear plastic strain and volumetric plastic strain and the latter is expressed with the generalized shear plastic strain. Furthermore, the model takes the strain rate effect into account to reflect the strength enhancement under dynamic loading. Because of the difference in plastic hardening between compression and tension, a modified hardening function is adopted. At the same time, the volume strain from HJC model is modified to be consistent with one of continuum mechanics. The developed model is numerically implemented into LS-DYNA with a semi-implicit algorithm through a user-defined material interface (UMAT). The reliability and accuracy of the developed model are verified by the simulation of four basic experiments with different loading conditions. The proposed model was found to be applicable to different mechanical behaviors of rock-like materials under static and dynamic loading conditions.
Farmer-Led Seed Production: Community Seed Banks Enter the National Seed Market
Authors: Vernooy Ronnie , Rana Jai , Otieno Gloria , Mbozi Hilton , Shrestha Pitambar
Published: July 2022

Smallholder farmers around the world obtain their seed from various sources, which can vary over time. In some countries, smallholder farmers are gaining ground as local seed producers and sellers. This study focuses on the seed production and marketing operations, achievements, and challenges of a particular type of such producers—community seed banks—which are new players in the seed market. Pioneer case studies are presented from countries where grain legumes and dryland cereals are important crops: India, Nepal, Uganda, and Zimbabwe. A mixed methodology was used to collect data, including a literature review, focus group discussion, key informant interview, and participatory observation. The case studies demonstrate the viability of community seed banks as seed businesses but becoming successful is not easy and depends on managerial, technical, financial, social, and policy factors. The cases benefitted from strong initial support provided by a committed and experienced organization, as part of a trajectory of nurtured seed development and empowerment. Embedding local seed enterprises in seed sector networks is crucial to creating demand and gaining recognition and support. Government and development organizations could learn from the case study experiences and support programs to foster local seed businesses as key actors in integrated seed sector development.
Preclinical Immunogenicity and Efficacy of a Multiple Antigen-Presenting System (MAPSTM) SARS-CoV-2 Vaccine
Authors: Cieslewicz Brian , Makrinos Daniel , Burke Heidi , Bree Dara , Haridas Renuka , Tonkiss Ian , Bartsch Yannic , Alter Galit , Malley Richard , Besin Gilles
Published: July 2022

Despite the remarkable success of SARS-CoV-2 vaccines, the rise of variants, some of which are more resistant to the effects of vaccination, highlights the potential need for additional COVID-19 vaccines. We used the Multiple Antigen-Presenting System (MAPS) technology, in which proteins are presented on a polysaccharide polymer to induce antibody, Th1, Th17 and CD8+ T cell responses, to engineer a novel vaccine targeting SARS-CoV-2. This vaccine contains a fragment of the spike (S) protein receptor-binding domain (RBD) sequence of the original D614G strain and was used to immunize nonhuman primates (NHP) for assessment of immunological responses and protection against SARS-CoV-2 challenge. The SARS-CoV-2 MAPS vaccine generated robust neutralizing antibodies as well as Th1, Th17 and cytotoxic CD8 T-cell responses in NHPs. Furthermore, MAPS-immunized NHPs had significantly lower viral loads in the nasopharynx and lung compared to control animals. Taken together, these findings support the use of the MAPS platform to make a SARS-CoV-2 vaccine. The nature of the platform also could enable its use for the inclusion of different variants in a single vaccine.
Promising layouts of the robotic section
Authors:   Bauman Moscow State Technical University, Moscow, Soloviev A. I. , Jafarova Sh. I. ,   Bauman Moscow State Technical University, Moscow, Syritsky A. B. ,   Bauman Moscow State Technical University, Moscow, Alstadt A. M. ,   Bauman Moscow State Technical University, Moscow, Nizamov M. D. ,   Bauman Moscow State Technical University, Moscow
Published: July 2022

Mechanical processing of machine-building parts in most cases is associated with the appearance of burrs, sharp edges, chips. To remove them, various types of equipment and tools are developed and used, a large amount of work is done manually by workers. In this paper, it is proposed to combine finishing and stripping operations performed using adjustable wire tools on multi-purpose machines using robotic manipulators. At the same time, it is proposed to use a system for monitoring the presence of burrs by machine vision processing information using a brightness-geometric model and filtering image pixels by brightness. Two variants of schemes for the organization of promising layouts of a robotic site are proposed to reduce the share of manual labor, expand the functions of robotic manipulators and the widespread use of adjustable wire tools.
Comparative analysis of methods for reducing residual stresses in welded structures made of austenitic steels
Authors:   Bauman Moscow State Technical University, Moscow, Kapranova I. A. , Rozhik D. D. ,   Bauman Moscow State Technical University, Moscow
Published: July 2022

In this article, the authors conducted a comparative analysis of methods for removing residual stresses in welded structures. The reasons for the formation of residual stresses and methods of their removal are given.
Minimal surfaces in science, technology, architecture
Authors:   Bauman Moscow State Technical University, Moscow, Yurenkova L.R. , Maksutova R.A. ,   Bauman Moscow State Technical University, Moscow, Meleshin D.M. ,   Bauman Moscow State Technical University, Moscow, Ivanov M. А. ,   Bauman Moscow State Technical University, Moscow
Published: July 2022

The article considers minimal surfaces, the interest in which has not decreased for more than two hundred years. The minimum surface is the surface of zero mean curvature. Initially, soap bubbles and soap films tightening wire contours were examples of such surfaces. Mathematicians were the first to pay attention to these surfaces, among which are names known all over the world: Lagrange, Laplace, Poisson, Steiner, Plateau. Scientists have noticed that the analytical expression of minimal surfaces is found in research in the field of physics and chemistry, which led to discoveries awarded the Nobel Prize. Due to the unusual properties of minimal surfaces, new construction materials have appeared in the technique.
New procedure for training in labor protection
Authors:   Volgograd Branch PJSC Rostelecom, professional support line Code. Techexpert", Senchenko V.A. , Kaverzneva T.T. ,   St. Petersburg Polytechnic University
Published: July 2022

The article deals with issues related to the new requirements for training in labor protection. It is considered how to draw up training programs on labor protection. Samples of a training program on general issues of labor protection and the functioning of the labor protection management system, the impact of harmful and (or) dangerous production factors, hazard sources identified in the framework of a special assessment of working conditions and occupational risk assessment are given.
Are we missing lifetime COPD diagnosis among people with COPD recorded death? A population-based retrospective cohort study
Authors: Gayle Alicia , Lenoir Alexandra , Minelli Cosetta , Quint Jennifer
Published: July 2022

Background

The British Lung Foundation (BLF) has previously estimated that there are 2.2 million people in the UK who have symptoms, but no diagnosis, of chronic obstructive pulmonary disease (COPD).

Aim

To investigate the proportion of patients with a missed COPD diagnosis among those with COPD as the cause of death on their death certificate, and how this has changed over a period of 17 years (2000–2017).

Design & setting

Clinical Practice Research Datalink (CPRD) Aurum and GOLD primary care data were linked with Office for National Statistics (ONS) mortality data and Hospital Episode Statistics (HES) data. Adults who died between 2000 and 2017 with COPD as their main cause of death were included.

Method

Using a range of diagnostic COPD criteria, the proportion of patients with a missed COPD diagnosis was estimated, and the demographic and clinical characteristics of patients with and without prior COPD diagnosis were described, using a mixed-effect logistic regression model.

Results

Depending on the COPD definition used, between 96% and 27% of the 78 621 patients included received a diagnosis of COPD before death. Using presence of a COPD Read or SNOMED CT code and performed spirometry as a main definition, just over half of the patients (52%) had received a COPD diagnosis overall, with a proportion of those who did not decreasing from 91% in 2000 to 31% in 2017 (Ptrend<0.001).

Conclusion

The proportion of people with COPD-recorded death and who had received a diagnosis of COPD has improved (increased) over time, and currently represents the majority of them. This suggests that few patients are now being missed.
Estudio del uso del coco en la gastronomía tradicional esmeraldeña aplicado en cinco recetas ecuatorianas
Authors: Milton Valverde John , Gutiérrez Viva Diego , Guapisaca Ángel Humberto , Villafuerte Pucha Maria
Published: July 2022

Varios factores han dado lugar a que, en Ecuador la gastronomía autóctona vaya desapareciendo lenta y a veces imperceptiblemente y tomando otros rumbos, como por ejemplo la suplantación de una comida saludable y sustentable por la conocida “fast food (comida rápida)”. Esto ha provocado que personas originarias de la provincia de Esmeraldas conozcan escasamente sus antiguas tradiciones alimenticias o no haya una transmisión adecuada de este conocimiento y las nuevas generaciones las sustituyan por lo más próximo a su entorno. En ese artículo, se plantea el rescate del coco, ingrediente utilizado en la provincia de Esmeraldas, a través de cinco recetas de esta modificadas por los autores pero que conserven el perfil de sabor típico de la provincia, al ser este reconocido incluso a nivel mundial por aquellos que lo han probado. Se recolectó información de la gastronomía tradicional esmeraldeña; así como una breve reseña basada en datos generales de la llegada del coco a esta provincia, luego se abarcó todo lo relacionado a este fruto tropical, desde su cosecha hasta las aplicaciones más relevantes que le dan a este producto en la gastronomía Esmeraldeña a través de la observación directa durante tres meses de estadía en algunos cantones de la provincia verde. Finalmente, en base a reflexiones derivadas del estudio etnográfico, se plantearon cinco propuestas que conjugan características únicas y distintivas de la geografía e historia afro ecuatoriana con la vanguardia gastronómica. El menú planteado fue evaluado por un panel de expertos mediante una degustación dirigida a través de una prueba de aceptación para luego ser presentado a las comunidades que intervinieron en este estudio.
20
μ
m-Thick Li
6.4
La
3
Zr
1.4
Ta
0.6
O
12
-Based Flexible Solid Electrolytes for All-Solid-State Lithium Batteries
Authors: Guo Qingya , Xu Fanglin , Shen Lin , Deng Shungui , Wang Zhiyan , Li Mengqi , Yao Xiayin
Published: July 2022

The doped garnet-type solid electrolytes are attracting great interest due to high ionic conductivity and excellent electrochemical stability against Li metal. However, the thick electrolyte layer and rigid nature as well as poor interfacial contact are huge obstacles for its application in all-solid-state lithium batteries. Herein, an ultrathin flexible Li
6.4
La
3
Zr
1.4
Ta
0.6
O
12
- (LLZTO-) based solid electrolyte with 90 wt% LLZTO content is realized through solvent-free procedure. The resultant 20 
μ
m-thick LLZTO-based film exhibits ultrahigh ionic conductance of 41.21 mS at 30°C, excellent oxidation stability of 4.6 V, superior thermal stability and nonflammability. Moreover, the corresponding Li||Li symmetric cell can stable cycle for more than 2000 h with low overpotential at 0.1 mA cm
-2
under 60°C. The assembled Li||LiFePO
4
pouch cell with integrated electrolyte/cathode interface exhibits excellent rate performances and cycle performances with a capacity retention of 71.4% from 153 mAh g
-1
to 109.2 mAh g
-1
at 0.1 C over 500 cycles under 60°C. This work provides a promising strategy towards realizing ultrathin flexible solid electrolyte for high-performance all-solid-state lithium batteries.
Penentuan Premi Tunggal Bersih pada Reversionary Annuity untuk Pasangan Suami Istri dengan Model Frank’s Copula
Authors: Godfrey Furlo Gilbert , Purnaba I Gusti Putu , Ruhiyat Ruhiyat
Published: July 2022

One of the multi-life annuity products is a reversionary annuity, a life annuity product for two insured people. The annuity payment for this product will begin after one of the insured specified in the contract dies first until the other insured dies as well. The calculation of the annuity premium is usually done by assuming independence between the random variable of remaining life-times of the insured parties. However, this is not relevant to the actual situation because the husband and wife are interrelated with their lives. This study considered this relationship when modelling the joint distribution of the remaining life-times between husband and wife. Frank’s copula was used to model the joint distribution of the remaining life-times of husband and wife. It was built from marginal distribution, which was assumed to follow the mortality value in the 2019 Indonesian Mortality Table IV. The mortality value at non-integer ages was assumed to follow a uniform distribution (uniform distribution of death). Furthermore, the joint survival distribution modelled by copula was constructed exactly when husband and wife are married. This study also considered the net single premium of reversionary annuity for several beneficiary cases. In general, the results of the calculation of the net single premium with Frank’s copula produced a lower value than the calculation of the assumption of independence for all beneficiary cases. In addition, the purchase time of an annuity also affects the net single premium, which increases up to a certain point of marriage age and then decreases thereafter.
Formulation of Sudoku Puzzle Using Binary Integer Linear Programming and Its Implementation in Julia, Python, and Minizinc
Authors: Bukhari Fahren , Nurdiati Sri , Najib Mohamad Khoirun , Safiqri Nandika
Published: July 2022

Sudoku is a number puzzle game popular among people with various difficulty levels (easy, medium, hard, and extremely hard). Sudoku can be modeled as a linear programming problem in mathematics, particularly binary integer linear programming (BILP). Completing Sudoku using BILP is quite tricky because it requires many iterations. Therefore, this study aims to analyze the Sudoku problem using the BILP formulation and implement the problem using Julia, Python, and MiniZinc. Out of 15 cases for each difficulty level, Julia performs better than Python and MiniZinc based on computation time. Moreover, Sudoku with easy difficulty levels is solved with a longer computation time than the other three difficulty levels. The computation time for solving BILP is getting faster as the difficulty level of the Sudoku problem increases. This is because Sudoku problems with easy difficulty levels have more known values as clues and generate more constraints than other difficulty levels.
PENGARUH KEMUDAHAN, IKLAN DAN CARA TRANSAKSI TERHADAP KEPUTUSAN PEMBELIAN KONSUMEN PADA AKEH SAMBAL DI TOKOPEDIA
Authors: Irvania Dea , Lisarini Endah , Malia Rosda
Published: July 2022

Digital Marketing merupakan salah satu media yang saat ini sedang banyak diminati oleh masyarakat serta sebagai pendukung dalam kegiatan sehari hari. Beberapa pelaku usaha menggunakan digital marketing untuk menjual produknya. Hal ini dianggap efektif dimasa pandemi covid-19 ini.  AKEH SAMBEL menggunakan Tokopedia sebagai Marketplacenya. Tujuan penelitian ini adalah : 1) Untuk mengkaji pengaruh variabel bebas kemudahan secara parsial terhadap keputusan pembelian online pada produk sambal kemasan AKEH SAMBAL. 2) Untuk mengkaji pengaruh variabel bebas iklan secara parsial terhadap keputusan pembelian online pada produk sambal kemasan AKEH SAMBAL. 3) Untuk mengkaji pengaruh variabel bebas cara transaksi secara parsial terhadap keputusan pembelian online pada produk sambal kemasan AKEH SAMBAL. 4) Untuk mengkaji pengaruh variabel bebas kemudahan, iklan dan cara transaksi secara simultan terhadap keputusan pembelian online pada produk sambal kemasan AKEH SAMBAL. 5) Untuk memahami dan mendeskripsikan kekurangan dan kelebihan penerapan digital marketing pada produk sambal kemasan AKEH SAMBAL. Data diperoleh dari 52 responden. Teknik pengambilan sampel menggunakan non-probability yaitu purposive sampling dan diolah dengan menggunakan analisis jalur. Hasil penelitian ini menunjukan bahwa 1) Secara parsial variabel bebas kemudahan berpengaruh tidak signifikan terhadap keputusan pembelian online pada produk sambal kemasan AKEH SAMBAL. 2) Secara parsial variabel bebas iklan berpengaruh tidak signifikan terhadap keputusan pembelian online pada produk sambal kemasan AKEH SAMBAL 3) Secara parsial variabel bebas cara transaksi berpengaruh tidak signifikan terhadap keputusan pembelian online pada produk sambal kemasan AKEH SAMBAL. 4) Secara simultan variabel bebas kemudahan, iklan dan cara transaksi berpengauh tidak signifikan terhadap keputusan pembelian.
RED RICE CONSUMER PURCHASE DECISION WITH MARKETING MIX APPROACH AND CONSUMER BEHAVIOUR
Authors: Jatmika Rahmat Taufiq Dwi , Anjani Nisa , Ajeng Ismi
Published: July 2022

Red rice is a product that has many benefits that are also sought after by the community. Red rice itself has good competitiveness if it is perfectly developed in the marketing mix used by the company. Consumer purchasing decisions are basically determined by how the organization or institution perfectly uses the marketing mix strategy. This article will examine how the Institute from the consumer's point of view of the use of the marketing mix that has been carried out and also its impact on purchasing decisions from consumers. The result of this article is the influence of the marketing mix which is influential but not significant on purchasing decisions. These results are because Red rice producers have not implemented the marketing mix perfectly. The conclusion and suggestion is that producers are more focused on developing the existing marketing mix in order to attract more consumers of Red rice in Cianjur Regency.
Postcolonial Feminist Theory: The Case of India
Authors: KAYMAZ MERT Melek , ÜNSAL Zeynep Ece
Published: July 2022

Feminism is a theory which emerged in the West as a result of the gender inequality women exposed and the inequal rights when compared to men. First, women struggled for their political rights and then their expectations changed and the perception of feminism has changed over the years. As the Western feminism has only protected the White women and ignored the differences among women. Third world countries, which were the colony of the Western countries for years, tried to reconstruct their own culture and their localness, interpreted feminism in a different way. The standardized woman which is accepted by the West ignores the ‘other women’ and degrades the problems of them only into the gender inequality. Postcolonial feminism emerged as a reaction to the standard feminist ideas. It desired to be a voice for the other women who are not Western and different from others. In this regard, India is the country where feminism has been interpreted in a different way. India is a country where the postcolonial feminist ideas were born. The aim of this article is to analyze the feminism and status of women in the Indian society in the context of postcolonial feminism by using the literature review method.
ÖĞRENCİLERİN ZİHİNSEL MODELLERİNİN RASCH ANALİZİNE GÖRE GELİŞTİRİLEN DÖRT AŞAMALI HÜCRE TANI TESTİYLE İNCELENMESİ
Authors: BOZDAĞ Hüseyin Cihan , GÖKLER İsa
Published: July 2022

Bu araştırmada, Fen Bilimlerinde ileri düzey konuların temelini oluşturan hücre konusuna ilişkin dört aşamalı tanı testi geliştirilmesi suretiyle ortaöğretim dokuzuncu sınıf öğrencilerinin zihinsel modellerinin belirlenmesi amaçlanmıştır. Tarama modelinin benimsendiği araştırma İzmir şehir merkezindeki bir devlet okulunda öğrenim gören 147 (110’u kız, 37’si erkek) lise öğrencisi ile yürütülmüştür. Araştırmada dört aşamalı ölçme aracının geliştirilmesi aşamasında geçerlik ve güvenirlik analizleri Rasch modeli ile gerçekleştirilmiştir. Rasch model analiz verileri, dört aşamalı tanı testinin iç uyum, dış uyum, boyutluluk ve nokta ölçüm korelasyon istatistikleri bağlamında tam bir uyum içinde olduğunu, geçerli ve güvenilir bir ölçme aracı olduğunu göstermiştir. Zihinsel modele yönelik bulgular incelendiğinde ortaöğretim dokuzuncu sınıf öğrencilerinin hücre konusundaki zihinsel modellerinin genel olarak bilimsel model kategorisinde olduğu belirlenmiştir. Kazanımlar bağlamında ise öğrencilerin zihinsel modellerinin bilimsel model ve ilkel model kategorilerinde olduğu belirlenmiş, sentez model kategorisine ise rastlanmamıştır. Araştırma sonucunda ulaşılan verilere dayalı olarak, öğretim basamaklarında dikkate alınması gereken zihinsel modellerin yeni bilginin edinilmesi ve yapılandırmasındaki rolüne dayalı olarak önerilerde bulunulmuştur.
Lifelong Learning for Sustainable Community Development: SPACE Graduates' Perceptions of its Economic Contributions and Challenges
Authors: Jamil Siti Munira , Safian Nurul Munirah , Zain Noor Hayati Mohd , Taib Nadzirah Husna Mohd , Zulkifli Nurul Raudhah , Yusof Zakaria Mohd , Rahman Azlan Ab
Published: July 2022

Objective - The study explores the effects of lifelong learning on the human capital base as well as sustainable community development with a particular focus on graduate students at SPACE, Universiti Teknologi Malaysia, a group that is still understudied in Malaysia.
Methodology/Technique – The study used a descriptive research approach with a sample size of 232. The sample was made up of 168, 38, and 26 students who graduated in 2020, 2018, and 2016, respectively. Stratified random sampling was used to select the samples from the three categories.
Finding – One-way analysis of variance (ANOVA) was also carried out to compare the various mean scores of the first two hypotheses. In order to promote sustainable community development, this study attempts to investigate how graduate students in SPACE prioritize lifelong learning. Accordingly, items with a mean greater than 2.50 were considered to contribute significantly.
Novelty – The study's findings include the financial advantages of lifetime learning, perspectives on using lifelong learning approaches to re-skill and upskill graduates in the current pandemic crisis, and barriers to lifelong learning in Malaysia. A rigid educational system, a lack of political will, and a rigid educational system were all barriers to graduate students' lifelong learning, in addition to their values and attitudes. A lack of institutional support, media coverage, and resources was also present. In terms of the financial advantages of lifelong learning and how the three groups of graduate students perceived using this strategy to re-skill and up-skill, ANOVA results showed that there was no statistically significant difference between the groups (p-value > 0.05).
Type of Paper: Empirical
JEL Classification: P25, O10, I25
Keywords: Lifelong learning; upskilling; reskilling; economic; graduate; community; human capital; sustainable
Reference to this paper should be referred to as follows: Jamil, S.M; Safian, N.M; Zain, N.H.M; Taib; Zulkifli, N.R; Yusof, Z.M; Rahman, A.A. (2022). Lifelong Learning for Sustainable Community Development: SPACE Graduates' Perceptions of its Economic Contributions and Challenges, GATR-Global J. Bus. Soc. Sci. Review, 10(2), 77–88. https://doi.org/10.35609/gjbssr.2022.10.2(2)
The Effect of Economic Growth, Agricultural Land, and Trade Openness Moderated By Population Density on Deforestation in OIC Countries
Authors: Rahma Febriyanti Annisa , Tri Ratnasari Ririn , Wardhana Akhmad Kusuma
Published: July 2022

Deforestation is a serious environmental problem in the OIC countries. From 1990 to 2016 based on 2019 OIC Environment Report data, compared to other groups outside the OIC, the OIC deforestation rate reached >10% on average, which was much higher. The focus of this study examines the effect of economic growth, agricultural land, and trade openness moderated by population density on deforestation. This study uses a quantitative approach and a Moderated Regression Analysis technique with a sample of 15 OIC countries from 2010-2019 taken from the purposive sampling method. The test results clarify that economic growth and agricultural land have a significant effect on the rate of deforestation, while the effect of trade openness is not significant on the rate of deforestation. From the results of the moderating variable, only agricultural land which has a significant effect on deforestation is moderated by population density. These results confirm Kuznets' environmental theory and environmental externality theory, and can be used as material for the government's evaluation to reduce deforestation rates and maintain forest sustainability according to SDG's No.15 agenda by considering demographic aspects such as population density. This study is limited to the 15 OIC countries that are the research sample due to their high forest fluctuations. s evaluation to reduce deforestation rates and maintain forest sustainability according to SDG's No.15 agenda by considering demographic aspects such as population density. This study is limited to the 15 OIC countries that are the research sample due to their high forest fluctuations. s evaluation to reduce deforestation rates and maintain forest sustainability according to SDG's No.15 agenda by considering demographic aspects such as population density. This study is limited to the 15 OIC countries that are the research sample due to their high forest fluctuations.
Therapeutic and clinical propositions of Mesenchymal Stem Cells(MSCs) focusing on recent trial updates
Authors: Chaklader Sneha , Basu Shamayita
Published: July 2022

The mesenchymal stroma harbours considerable population of stem cell-like cells with differentiation and self-renewal abilities that originate from several sources like amniotic fluid, Wharton’s jelly, umbilical cord etc. Mesenchymal Stem Cells (MSCs) are most commonly found in the perivascular niche. This multipotent progenitor cells have the ability to differentiate into mesodermal cell types such as adipocytes, chondrocytes and osteocytes. MSCs can also exert significant immunosuppressive and anti-inflammatory effects by interacting with lymphocytes from both innate and adaptive immune system. MSCs of fetal origins can go through same processes as MSCs derived from elsewhere. Before senescence, they make more cell divisions than adult MSCs of bone marrow or adipose tissue. The propitious properties of mesenchymal stem cells (MSCs), such as their ability to differentiate into diverse cell lineages and their regenerative properties, have intrigued researchers, whose work has provided fascinating perspectives on cell-based therapies for wide range of diseases. MSCs have a high potential for replication in vitro. International Society for Cellular Therapy (ISCT)-based MSC isolation has resulted in heterogeneous, nonclonal stromal cell cultures containing stem cells with various multipotent characteristics, committed progenitors, and differentiated cells. Nonclonal stromal cultures which are derived from bone marrow and other tissues are presently used as sources of putative MSCs for therapeutic aims. Also, MSCs have potential to endogenously repair as well as reduce the inflammatory responses that may lead to decreased morbidity and mortality rate of COVID-19. Herein, the MSC-based clinical prospects, clarifies, the recent clinical findings, therapeutic effects of MSC and clinical trials.
ECG Simulator Based on Microcontroller Equipped with Arrhythmia Signal
Authors: Utomo Bedjo , Wisana I Dewa Gede Hari , Hamzah Torib , Lamidi Lamidi , Wicaksono Denis Kurniar , Baighout Sedigheh Ashgari
Published: July 2022

Electrocardiograph (ECG) is one of the diagnostic sciences that is often studied in modern medicine, used to detect damage to the components of the heart or disorders of the heart rhythm called arrhythmias. The purpose of this research is to develop an Electrocardiograph simulator that is equipped with arrhythmia. The main design consists of an Arduino Mega 2560 microcontroller, MCP4921 DAC (Digital to Analog Converter) circuit, a network resistor, and a sensitivity selection circuit. The MCP4921 type DAC converts the digital signal data into analog data which will then be forwarded to the resistor network circuit as a signal formation for each lead. The basic signal image data used for the formation of normal Electrocardiograph and arrhythmias were taken from the Electrocardiograph recorder using Phantom Electrocardiograph. Based on the readings on the Beat Per Minute setting of the module to the Beat Per Minute printout on the Electrocardiograph recorder, the error rate value for the Normal Sine Rhythm parameter is 0.790% for Beat Per Minute 30, 0.383% for Beat Per Minute 60, 0.535% for Beat Per Minute 120, 0.515% for Beat Per Minute 180 and 0.593% for Beat Per Minute 240. The error rate for the Arrhythmia parameter is 2.076% for ventricular tachycardia Beat Per Minute 160 and 0.494% for Supraventricular Tachycardia Beat Per Minute 200. The design of the Electrocardiograph simulator can simulate the signals of the human body and it can be used as a medium in the learning process in the world of health
Skenea profunda (Vetigastropoda: Skeneidae) in the central Arctic
Authors: Nekhaev Ivan O.
Published: July 2022

This paper describes finding of 3 specimens of Skenea profunda (Friele, 1879) in the Arctic Basin from a depth of 3700-3800 m. The species had been previously reliably known only from the bathyal part of the North Atlantic and is confined to communities of sunken wood. This is the second finding of a taxon obligate for such habitats in the Arctic Ocean and confirms the assumption that there is a fauna associated with wood falls on the path of the Transpolar Drift Flow in the Central Arctic.
METODE PENGINJILAN TERHADAP ANAK PUNK DI KOMUNITAS CROSSLINE FAMILY
Authors: Stephen Raymond , Handoko Yusuf Slamet
Published: July 2022

Suatu misi penginjilan dapat berhasil apabila dilaksanakan secara kontekstual. Salah satu lembaga misi yang berhasil menjalankan penginjilan secara kontekstual adalah Crossline Family yang melaksanakan misi kepada anak punk. Penelitian ini bertujuan menggali metode penginjilan yang digunakan Crossline Family terhadap anak punk. Metode yang dipakai adalah kualitatif deskriptif. Informan adalah pemimpin dan anggota Crossline Family. Data diambil melalui teknik wawancara dan analisa sejarah perjalanan pelayanan Crossline Family yang telah didokumentasikan melalui video. Penelitian menemukan adanya tiga metode yang digunakan Crossline Family dalam penginjilan terhadap anak punk yaitu: 1) berelasi tanpa menghakimi, 2) pro-aktif berada di tengah-tengah kehidupan mereka dan menjadi teladan; 3) menyampaikan Firman Tuhan melalui genre lagu anak punk.