bluuebunny/crossref_metadata_2025 huggingface dataset:
Influence of iron anisotropy on phase transition near grain boundary under shock
Authors: Zhang Xue-Yang , Hu Wang-Yu , Dai Xiong-Ying ,   School of Computational Science and Electronics, Hunan Institute of Engineering, Xiangtan 411104, China,   College of Materials Science and Engineering, Hunan University, Changsha 410082, China
Published: November 2023

As is well known, iron plays an important role in the fields of national defense and industry, so it is of great significance to study its behavior under dynamic high pressure. As one of the most common defects in metals in nature, grain boundaries have an important influence on the mechanical properties and deformation of materials under shock. This work intends to use large-scale non-equilibrium molecular dynamics simulation to study the influence of iron anisotropy on the phase transition in bicrystal under shock loading. By tracking the local structure, shear stress distribution and morphology characteristics after shock on both sides of the grain boundaries, the factors affecting the response on both sides of the grain boundary are analyzed. Our research result shows that shocking along the non-centrosymmetric grain direction can cause significant differences in the phase transition threshold, path and mode on both sides of the symmetric grain boundary. Especially, the different phase transition dynamic processes on both sides of the sigma11 grain boundary are discussed in detail in this work, which have been rarely discussed in previous studies. Considering the symmetry of the microstructure on both sides of this type of grain boundary, the result of asymmetric shock response is different from people’s inertial cognition. Finally, it is found that the atoms in both models will shift along the direction perpendicular to the shocked direction under shock, indicating that the shock wave generated by the piston method should no longer be simply regarded as one-dimensional when shocked along the non centrosymmetric crystal direction, and the displacement of atoms along the direction perpendicular to the shocked direction is closely related to the symmetry of the crystal, which causes significant differences in shear stress on both sides of the grain boundary and ultimately affects the shock response. This study reveals that the anisotropy of lattice has an important effect on the phase transition on both sides of grain boundaries under shock loading, which can provide theoretical support for the experimental studies of polycrystalline metals and alloys under shock.
Research on Network Similarity Comparison Method Based on Higher-Order Information
Authors: Chen Hao-Yu  , Xu Tao  , Liu Chuang  , Zhang Zi-Ke  , Zhan Xiu-Xiu  ,   1) Complex Science Research Center, Hangzhou Normal University, Hangzhou 311121;,   2) Digital Communication Research Center, Zhejiang University, Hangzhou 310058, China;,   3) School of Media and International Culture, Zhejiang University, Hangzhou 310058
Published: November 2023

Quantifying structural similarity between complex networks presents a fundamental and formidable challenge in network science, which plays a crucial role in various fields, such as bioinformatics, social science, and economics, and serves as an effective method for network classification, temporal network evolution and network generated model evaluation, etc. Traditional network comparison methods often rely on simplistic structural properties such as node degree and network distance. However, these methods only consider the local or global aspect of a network, leading to inaccuracies in network similarity assessments. In this paper, we introduce a network similarity comparison method based on the high-order structure. This innovative approach takes into account both the global and local structures of a network, resulting in a more comprehensive and accurate quantification of the network difference. Specifically, we construct distributions of higher-order clustering coeffcients and distance between nodes within a network. The JensenShannon divergence, based on these two distributions, is used to quantitatively measure the similarity between two networks, offering a more refined and robust measure of network similarity. To validate the effectiveness of our proposed method, we conducted a series of comprehensive experiments on both artificial and real-world networks, spanning various domains and applications. By meticulously fine-tuning the parameters associated with three distinct artificial network generation models, we systematically compared the performance of our method under a wide range of parameter settings within the same network. In addition, we generated four different network models with varying levels of randomization, creating a diverse set of test cases to evaluate the method's robustness and adaptability. In artificial networks, our study rigorously compared our proposed method with other baseline techniques, consistently demonstrating its superior accuracy and stability through experimental results; In real networks, we selected datasets from diverse domains and confirmed the reliability of our method by conducting extensive similarity assessments between real networks and their perturbed reconstructed counterparts. Furthermore, in real networks, the rigorous comparison between our method and null models underscored its robustness and stability across a broad spectrum of scenarios and applications. Finally, a meticulous sensitivity analysis of the parameters revealed that our method exhibited remarkable performance consistency across networks of different types, scales, and complexities.
Recent progress and frontier issues in thermal transport theory of metals
Authors: Wang Ao , Sheng Yu-Fei , Bao Hua ,   Global Institute of Future Technology, Shanghai Jiao Tong University, Shanghai 200240, China,   University of Michigan-Shanghai Jiao Tong University Joint Institute, Shanghai Jiao Tong University, Shanghai 200240, China
Published: November 2023

Metal is one of the most widely used engineering materials. In contrast to the extensive research dedicated to their mechanical properties, studies on the thermal conductivity of metals remain relatively rare. The understanding of thermal transport mechanisms in metals is mainly through the Wiedemann-Franz Law established more than a century ago. The thermal conductivity of metal is related to both the electron transport and the lattice vibration. An in-depth understanding of the thermal transport mechanism in metal is imperative for optimizing their practical applications. This review first discusses the history of the thermal transport theory in metals, including the Wiedemann-Franz law and models for calculating phonon thermal conductivity in metal. The recently developed first-principles based mode-level electron-phonon interaction method for determining the thermal transport properties of metals is briefly introduced. Then we summarize recent theoretical studies on the thermal conductivities of elemental metals, intermetallics, and metallic ceramics. The value of thermal conductivity, phonon contribution to total thermal conductivity, the influence of electron-phonon interaction on thermal transport, and the derivation of the Lorenz number are comprehensively discussed. Moreover, the thermal transport properties of metallic nanostructures are summarized. The size effect of thermal transport and the Lorenz number obtained from experiments and calculations are compared. Thermal transport properties including the phonon contribution to total thermal conductivity and the Lorenz number in two-dimensional metals are also mentioned. Finally, the influence of temperature, pressure, and magnetic field on thermal transport in metal are also discussed. The deviation of the Lorenz number at low temperatures is due to the different electron-phonon scattering mechanisms for thermal and electrical transport. The difference in thermal conductivity among metals is induced by the difference in pressure among different metals and is related to the electron state at the Fermi level as well. The effect of magnetic field on thermal transport is related to the coupling between the electron and the magnetic field, therefore the electron distribution in the Brillouin zone is an important factor. In addition, this review also looks forward to the future research directions of metal thermal transport theory.
Acoustic scattering modeling and sound field characteristics of rough seafloor in shallow sea
Authors: Wang Lei , Huang Yi-Wang , Guo Lin , Ren Chao ,   National Key Laboratory of Underwater Acoustic Technology, Harbin Engineering University, Harbin 150001, China,   Key Laboratory of Marine Information Acquisition and Security (Harbin Engineering University), Ministry of Industry and Information Technology, Harbin 150001, China,   College of Underwater Acoustic Engineering, Harbin Engineering University, Harbin 150001, China,   Shanghai Acoustics Laboratory, Institute of Acoustics, Chinese Academy of Sciences, Shanghai 201815, China
Published: November 2023

Acoustic scattering is an important part of ocean acoustics, and the acoustic scattering caused by the unevenness of the seafloor surface is one of the reasons for the fluctuation of acoustic propagation in the ocean. In order to solve the acoustic scattering problem of sea bottom surface roughness, normal wave theory is used to model the acoustic field. To simplify the problem, Lambert’s law is used to establish the seafloor rough scattering model in horizontal layered shallow sea waveguides, and the scattering field is assumed to be isotropic in the horizontal direction. Based on this model, the amplitude distribution and the phase distribution of the scattered sound pressure are obtained, and the intensity of the scattered sound field and its spatial correlation coefficient are simulated numerically. The prediction of the scattered sound field under rough interface conditions is realized, and the variation of the spatial characteristics of the scattered sound field with the roughness of the seafloor is revealed. The results show that when Lambert’s law is used to describe the rough interface acoustic scattering and when the seafloor roughness is smaller than the wavelength, the spatial correlation coefficient of the scattered sound field at two different positions in space has a change rule of periodic oscillation attenuation with the increase of spatial distance, and in the vertical direction, the oscillation period is larger and the attenuation is slower. When the roughness increases, the oscillation amplitude of the horizontal and the vertical correlation coefficient gradually increase, the oscillation period of the horizontal correlation coefficient gradually decreases, and the vertical correlation coefficient no longer attenuates in the direction near the seafloor, which is the result of the weakening of the seafloor acoustic scattering. The model theory in this paper can also be extended to the acoustic scattering modeling of rough sea surface. For the case of non-horizontal seabed, the scattered sound field of the rough interface in the waveguide can be obtained by using coupled normal wave or adiabatic normal wave theory.
Monte Carlo global variance reduction method combining source bias and weight window
Authors: Zhang Xian , Liu Shi-Chang , Wei Jun-Xia , Li Shu , Wang Xin , Shangguan Dan-Hua ,   Institute of Applied Physics and Computational Mathematics, Beijing 100094, China,   School of Nuclear Science and Engineering, North China Electric Power University, Beijing 102206, China,   Software Center for High Performance Numerical Simulation, China Academy of Engineering Physics, Beijing 100088, China
Published: November 2023

The global tally problem has a wide range of applications in major research fields such as Monte Carlo simulations of pin-by-pin reactor models and time-dependent particle transport problems in multi-physics coupling calculations. Due to the uneven power distribution of the simulated system, the statistical errors of all tallies are unevenly distributed, resulting in some low global efficiency. For this kind of problem with global characteristics, it is necessary to develop global variance reduction techniques to obtain the accurate distribution of target tallies in the entire space. A large number of global variance reduction algorithms have been studied based on the consideration of flattening global tally error distribution, so as to improve global efficiency. This work focuses on the combination of two efficient global variance reduction algorithms, namely, the uniform tally density algorithm and the weight window algorithm, which belong to source bias and transport process bias, respectively. In tally, a method is proposed to adjust the weight window parameters by using the bias factor of the uniform tally density algorithm. Then, the weight window method will be used to reduce the weight fluctuation caused by the uniform tally density method. In this way, an organic combination of these two algorithms can be realized. A series of comparative tests are carried out based on the Hoogenboom-Martin pressurized water reactor benchmark, and it is verified that the hybrid global variance reduction algorithm proposed in this work is better than the single weight window algorithm or the uniform tally density algorithm. In terms of reducing the maximum error, the global efficiency of the hybrid algorithm is 2.6 times and 3 times that of the weight window algorithm and the uniform tally density algorithm, respectively. In addition, through the comparative analysis of computational asymmetry degree and computational efficiency, it is verified that the uniform tally density algorithm has better performance than the classical uniform fission site algorithm, and the performance advantages of the uniform tally density algorithm are quantitatively evaluated based on some new indicators. The results show that the hybrid global variance reduction algorithm proposed in this work can solve the global tally problem efficiently, thereby further promoting research in related fields.
Noise spectrum analysis of superconducting kinetic inductance detectors
Authors: Shi Zhong-Yu , Dai Xu-Cheng , Wang Hao-Yu , Mai Zhan-Zhang , Ouyang Peng-Hui , Wang Yi-Zhuo , Chai Ya-Qiang , Wei Lian-Fu , Liu Xu-Ming , Pan Chang-Zhao , Guo Wei-Jie , Shu Shi-Bo , Wang Yi-Wen ,   Quantum Optoelectronics Laboratory, School of Physical Science and Technology, Southwest Jiaotong University, Chengdu 610031, China,   Shenzhen Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China,   International Quantum Academy, Shenzhen 518048, China,   Information Quantum Technology Laboratory, School of Information Science and Technology, Southwest Jiaotong University, Chengdu 610031, China,   Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
Published: November 2023

As a newly developed pair-breaking superconducting detector, microwave kinetic inductance detectors are simple to integrate in the frequency domain and have already been used in astronomical detection and array imaging at the (sub)millimeter and optical wavelengths. For these applications, the dark noise level of kinetic inductance detector is one of the key performance indicators. Herein a noise power spectrum analysis method is introduced in detail, which can accurately and effectively analyze the noise spectrum of kinetic inductance detector in a wide frequency range. This method can well balance the noise spectrum resolution and variance performance, by taking the noise data at the resonance frequency with two sampling rates and setting the appropriate frequency resolutions for different frequency bands. This method is used to characterize and compare the noise of aluminum (Al) kinetic inductance detectors made from two different micromachining processes. We deposite a 25-nm-thick aluminum film on high-resistivity silicon substrate for one device, while place one silicon nitride (SiNx) film on the top and one on the bottom of the aluminum film for another device. It is found that the frequency noise of the device with two silicon nitride films is about 25% to 50% of the bare aluminum device. Using this double silicon nitride film fabrication technique, we further fabricate a few groups of lumped-element aluminum kinetic inductance detectors with various inductor and interdigitated capacitor designs. We investigate the noise properties of these devices at different microwave driven power and bath temperatures, and the experimental results show typical two-level system noise behaviors. Our work provides a standard method to characterize the noise power spectrum of kinetic inductor detector, and also paves the way to developing low-noise aluminum kinetic inductance detectors for terahertz imaging, photon-counting and energy-resolving applications.
Bone marrow mesenchymal stem cell-derived exosomal microRNA regulates microglial polarization
Authors: Huang Xianwei , Liu Xiong , Zeng Jiaqi , Du Penghui , Huang Xiaodong , Lin Jiyan
Published: November 2023

Objective

This study aimed to explore the effects of bone marrow mesenchymal stem cell (BMSC)-derived exosomal miR-146a-5p on microglial polarization and the potential underlying mechanisms in oxygen-glucose deprivation (OGD)-exposed microglial cells.

Methods

Exosomes were isolated from BMSCs, and their characteristics were examined. The effects of BMSC-derived exosomes on microglial polarization were investigated in OGD-exposed BV-2 cells. Differentially expressed miRNAs were identified and their biological function was explored using enrichment analyses. The regulatory role of miR-146a-5p in microglial polarization was studied via flow cytometry. Finally, the downstream target gene Traf6 was validated, and the role of the miR-146a-5p/Traf6 axis in modulating microglial polarization was investigated in OGD-exposed BV-2 cells.

Results

BMSC-derived exosomes were successfully isolated and characterized. A total of 10 upregulated and 33 downregulated miRNAs were identified. Exosomal treatment resulted in significant changes in microglial polarization markers. miR-146a-5p was found to be significantly downregulated in OGD-exposed microglial cells treated with exosomes. Manipulation of miR-146a-5p expression modulated microglial polarization. Moreover, the miR-146a-5p/Traf6 axis regulated microglial polarization.

Conclusion

Our findings demonstrate that BMSC-derived exosomal via miR-146a-5p modulates microglial polarization by targeting Traf6, providing a potential thermal target for the treatment of neurological diseases involving microglial activation.
La malla estadística como unidad de análisis espacial. Razón de mortalidad, población y vivienda Autores/as
Authors: Escudero-Tena María , Ojeda-Casares Serafín , Moya Luis-Ángel , Enrique-Regueira Iria
Published: November 2023

La generación de unidades de observación de dimensiones reducidas y geometría regular tiene cada vez más peso en el análisis espacial. Siguiendo esta línea de trabajo, el Instituto de Estadística y Cartografía de Andalucía elabora, desde hace diez años, información integrada en la malla estadística formada por celdas regulares de 250 x 250 metros según las directrices de Eurostat. En este artículo se muestran los resultados de la utilización de datos de distribución espacial de la población y de la vivienda. Se han realizado análisis de autocorrelación y de correlación espacial para conocer la relación que existe entre la Razón de Mortalidad Estandarizada Suavizada y determinados indicadores socioeconómicos y de algunas características de las viviendas. Se muestran los resultados y las ventajas de trabajar en un nivel de desagregación territorial de dimensiones reducidas y con una unidad de observación homogénea, para obtener así un conocimiento más exhaustivo del territorio.
Exploration of Philippine Literature a Corpus-Based Study Framework
Authors: Acosto, Viness Pearl Kristina R.  , Fernandez, Athena Dimple E.  , Imba, Sharine Beth A.  , Engay, Danilo G. Jr
Published: November 2023

The literature of the Philippines shows the European, North American and Asian colonial legacy of the country, hence the diverse and richness of the written works that it contains. These literary pieces could be interpreted in various ways that could help understand how those influences shaped Philippine literature and contributed to the nation’s history and traditions over the years. The study sought to explore the literary works of the Philippines, particularly short stories. Narrative Analysis, specifically Gerard Genette’s theory of Narratology with four analytical categories — narrative mood, narrative instance, narrative levels, and narrative time was used in interpreting the selected 32 short stories from the American to the Contemporary period. After a thorough analysis of the selected pieces, the study was able to determine that predominantly, Filipino writers from the time specified followed a varied manner in the act of narrating, employed a heterodiegetic voice, extradiegetic in its embedded narratives and a fair incorporation of singulative, repetitive and iterative components. Through the analysis, it was found that the narrative mood, instance, time, and level that were found in each literary piece were represented in both distinct and relative manner. The researchers recommend to the administrators in education to utilize studies as means to structure other similar studies to help provide more evaluation and inquiries to the Philippine literary works and for future researchers to produce more credible and generous sources about the interpretation, survey and analysis of the different literary pieces in the Philippines from the previous eras to the Contemporary time.
Navigating the Modernization of Legacy Applications and Data: Effective Strategies and Best Practices
Authors: Ponnusamy Sivakumar , Eswararaj Dinesh
Published: November 2023

Aims: This research offers an in-depth exploration of the hurdles organizations face during legacy application modernization. The investigation delves into the primary motivations behind modernization, delineates the associated challenges, and proposes viable strategies and best practices to mitigate these issues.

Study Design: This is a Review Article which synthesizes and critically assesses a broad array of sources relevant to legacy application modernization. It amalgamates insights from various studies, offering a comprehensive overview and analysis of existing literature to derive meaningful conclusions and recommendations. Through this approach, the article provides a holistic understanding of the challenges and strategies associated with modernizing legacy systems.

Place and Duration of Study: This global study was conducted over eight years, from January 2016 to August 2023.

Methodology: This research uses a literature review to collect data. In the literature review process, a comprehensive array of data collection methods is strategically employed to ensure the acquisition of a diverse and pertinent body of knowledge concerning the challenges associated with modernizing legacy applications and the effective strategies and best practices to address them. It starts with searching in extensive Online Databases and Repositories, using Keyword Searches and Citation Tracking to find the relevant literature. Systematic reviews and meta-analyses give structured synthesis, while manual searches collect real-world case studies. Grey Literature supplements insights, and Evidence-Based Practices ensure rigor. Thematic Analysis sorts findings, whereas Data Management arranges data, and the Critical Appraisal Skills programme evaluates the credibility of sources. This approach is an important starting point for modernizing legacy systems and developing effective policies and guidelines.

Results: The research identifies business necessities and technological advancements as the predominant catalysts for modernization. It further elucidates the obstacles encountered by organizations during this transition, such as the intricacies of data migration, the complexity inherent in legacy systems, and issues related to user acceptance and integration. The investigation also delves into potential strategies and best practices to navigate these challenges, emphasizing the significance of selecting the right modernization approach.

Conclusion: The existing research underscores that although the path to modernizing legacy applications has obstacles, they can be navigated successfully through astute planning, strategic decision-making, and adept execution. In doing so, organizations have the potential to metamorphose their dated systems into valuable tools that resonate with current business demands and the latest technological advancements.
Optimization of Seed Priming Techniques for Seed Enhancement in Sunflower (Helianthus annus L.)
Authors: Pavitramata G. B.  , Bindu Priya P.  , Pallavi M.  , Rajeswari B.
Published: November 2023

Seed invigoration treatments are crucial for enhancing germination and seedling growth, particularly under adverse environmental conditions. Various techniques, such as hydropriming, seed hardening, osmopriming, and pre-sowing dry heat treatments have been proved to improve seed quality. Sunflower is an important oilseed crop, however, its area is now confined to specific niches and therefore any efforts to increase its production and bring back its glory are highly welcome. Sunflower crop is highly susceptible to environmental stresses further limiting its cultivation. Hence identification and standardization of suitable techniques to improve the germination capacity and planting value of sunflower especially under stress conditions is the need of the hour. The present study is taken up in aged and fresh seeds of two sunflower hybrids viz., DRSH-1 and GK-2002 to standardize hydropriming, thermo priming and pre-chilling treatments so as to the enhance planting value when sown under sub optimal conditions. It was found that hydropriming for 16 hrs, thermopriming for 6hrs at 35oC and pre chilling for 7 days at 10oC showed highest improvement in the seed quality parameters like germination percentage, seedling vigour indices I and II, field emergence and speed of germination. These findings offer promising avenues for improving seed quality and viability in sunflower.
Spatial Variability in Soil Micronutrients and Soil Separates of Ujjain Tehsil of Ujjain District of Madhya Pradesh, India
Authors: Gehlot Yashwant , Aakash  , Gallani Roshan , Kamle Sonali , Singh Veer , Kamle Rinku
Published: November 2023

Mapping of soil properties is an important operation as it plays an important role in the knowledge about soil properties and how it can be used sustainably. Knowledge of soil variability of any region is crucial for development of site-specific management practices for that region as this will enhance the crop productivity and maintain the good soil health. With this background, present study was conducted to quantify the spatial variability of different soil physical properties and soil available micronutrients in Ujjain tehsil (Ujjain) district of Madhya Pradesh state, India. A total one hundred fifty geo-coded surface (0-15 cm depth) soil samples, were collected across the study area. These samples were analyzed using standard method for different some soil properties viz: soil texture (sand, silt and clay) and soil available micronutrients, viz. extractable zinc (Zn), copper (Cu), manganese (Mn) and iron (Fe) in laboratory. The range of sand, silt, clay, Zn, Cu, Fe and Mn in the study region were varied from 9.15 to 24.06 %, 24.00 to 41.55 %, 40.20 to 58.60 %, 0.12 to 1.66 mg kg-1, 2.06 to 6.22 mg kg-1, 3.70 to 10.40 mg kg-1, and 2.41 to 14.64 mg kg-1, respectively. The data were analyzed using standard statistical methods and geostatistics, which included creating semi-variograms and mapping by standard kriging procedures. Semi-variograms were produced for soil properties and their regional distributions were plotted. The observed soil parameters were best represented by four models: Exponential, Circular, Gaussian, and Hole effect. The modelled variables showed strong and moderate spatial dependencies, as demonstrated by the Nugget/Sill (Co/Co+C) ratio. The distribution maps of soil features may serve as a reference for implementing site-specific crop management in soils with comparable characteristics. Further, this research indicates the relevance of GIS- application in soil variability investigations.
Conservation Agriculture Strategies Evaluation under Rainfed Conditions
Authors: Devappa  , Rajashekarappa, K. S.  , Mudalagiriyappa  , Devaraj, K.  , Latha, H. S.
Published: November 2023

Continuous tillage has a significant impact on the characteristics of the soil; therefore, it's critical to use tillage techniques that preserve crop production, prevent soil structure from being destroyed, and provide greater financial returns rather than harming the health of the soil. Practicing agriculture through minimum soil disturbance, incorporation of crop residues through in-situ green manuring enhances the crop growth attributes of pigeon pea under thirsty and nutrient hunger dryland conditions by improving the physicochemical and biological properties of soil. A field investigation was carried out to evaluate conservation agriculture effect on agronomic growth attributes of pigeon pea and set up in spilt plot design. Among all the tillage practices conventional tillage with horse gram in-situ green manuring has recorded maximum plant height, leaves, branches,  stem girth at all growth stages and yield attributes. However, M1 witnessed lower benefit to cost ratio than reduced tillage (M2) (1 Harrowing + 1 intercultural operation + pre-emergence herbicide). Farming with zero tillage alone affects the plant growth by excessive weed growth, soil compaction and which results in minimum yield. Therefore optimum number of tillage operations is the key to maintain soil health and to achieve the  best benefit for the rupee invested.
Optimization, a Potential Production, GC-MS and Characterization of Dark Green Pigment from New Local Isolate Streptomyces nigra Strain GH12
Authors: Sayed Gehad H. El , Fadel Mohamed , Marzouk Mohamed
Published: November 2023

Due to increasing health awareness among consumers and the identification of novel pharmacological properties of diverse natural pigments, the market for natural pigments is currently seeing rapid growth. Streptomyces. nigra GH12, a new Actinomycete isolate identified by 16S rRNA used for dark green pigment production. Manipulations of the factors affecting pigment production are the most effective way to have maximum yield of pigment. Starch 2.5% (w/v), ammonium nitrate 0.2% (w/v), dibasic sodium phosphate 0.1% (w/v), inoculums size 6% (v/v),  initial pH level of 8, 150 rpm rotation speed, 37 ºC temperature, and 9 days of incubation  were found the optimum growth conditions for the highest green  pigment production. The extraction of green pigment was performed efficiently with ethanol solvent. Results showed no effect on the pigment content at 40, 50 and 60°C. On heating pigment extract at 70, 80, 90 and 100oC for 60 min, retention of pigment remained as high as 97.4, 93, 86 and 79% of the total pigment density , respectively, even with continuous treatment at 100°C for more 60 min. The results indicated that the pigment extracts exhibited their greatest stabilities at high pH values, i.e. 8.0, 8.5, 9.0 and 10.0, during the entire holding time. The pigment was characterized by full UV-visible spectroscopic screening, where the potential absorption maximum of the target green pigment extract was recorded in the range of 300 ̶ 360 nm, with a λmax at 340 nm. Moreover, the chemical composition diversity of the pigment extract was further investigated by GC/MS analysis that revealed the presence of 57 metabolites in their silylated form.
PENENTUAN RUTE TRUK PENGUMPULAN DAN PENGANGKUTAN SAMPAH DI BANDUNG
Authors: Fitria Lisye , Susanty Susy , Suprayogi Suprayogi
Published: November 2023

The garbage collection constitutes the main contributor in terms of the garbage cost management. Garbage collection scheduling model is a variable that determine cost center. Regarding to the existing condition, scheduling model could be designed concerning to the constraints, such as: amount of vehicles, transportation time, and transport system. This research develops a Vehicle Routing Problem (VRP) model for determining the optimal route in garbage gathering collection. The VRP model utilizes intermediate facility. This model is called the Vehicle Routing Problem with Multiple Trips and Intermediate Facility (VRPMTIF). The VRPMTIF is solved by using a Sequential Insertion Algorithm. The algorithm applied to the determine garbage collections routes in Bandung with result as follows: 28 vehicles for West Bandung, 41 vehicles for Central Bandung, and 68 vehicles for East Bandung where there are different accomplishment time for each scenario.

Abstract in Bahasa Indonesia:

Proses pengumpulan sampah merupakan kontributor terbesar dalam biaya pengelolaan sampah. Rute pengumpulan sampah adalah faktor penentu biaya pengelolaan sampah. Rute pengumpulan sampah dapat dibuat dengan memperhatikan keterbatasan yang ada seperti: jumlah kendaraan, waktu angkut dan sistem pengangkutan yang dilakukan. Penelitian ini bertujuan untuk menentukan rute pengumpulan dan pengangkutan sampah. Kondisi pengumpulan sampah dapat dianalogikan dengan model Vehicle Routing Problem dengan menambahkan intermediate facility pada akhir rute, yakni tempat pembuangan sampah akhir. Model ini disebut Vehicle Routing Problem with Multiple Trips and Intermediate Facility (VRPMTIF). Penentuan rute pengumpulan sampah VRPMTIF diselesaikan dengan menggunakan algoritma sequential insertion. Algoritma tersebut diterapkan pada penentuan rute pengumpulan sampah di Kota Bandung dengan hasil sebagai berikut: 28 tur untuk Bandung Barat, 41 tur untuk Bandung Tengah, dan 68 tur untuk Bandung Timur dengan waktu penyelesaian yang berbeda untuk setiap skenario.

Kata kunci: Vehicle Routing Problem, multiple trips, intermediate facility, algoritma sequential insertion
PENGADOPSIAN TEKNOLOGI RFID DI RUMAH SAKIT INDONESIA, MANFAAT DAN HAMBATANNYA
Authors: Vanany Iwan , Shaharoun Awaluddin Bin Mohamed
Published: November 2023

This paper explores the benefit and barriers of RFID (Radio Frequency Identification) technology adoption in Indonesian hospitals context. The investigation methods of this research used interview and semi-structured questionnaire on RFID consultants, RFID researchers, and big hospital managers in Java Island. The benefits and barriers of RFID technology adoption are identified from literature review. The barriers of RFID technology adoption are divided into two aspects, i.e., as business and technology aspects. The results of this study suggest that the benefits of RFID technology adoption are dominated of intangible benefit. Most of the respondents believed that the main barriers of RFID technology adoption are (1) the complexity of RFID technology (2) the lack of complete and valid information, and (3) there is no sufficient budget available. The detail of the outcomes and the implications of this reasarch are also discussed.

Abstract in Bahasa Indonesia:

Makalah ini berupaya mengeksplorasi manfaat dan hambatan dari pengadopsian teknologi RFID (Radio Frequency Identification) dalam konteks rumah sakit di Indonesia. Metode investigasi dari penelitian ini menggunakan wawancara dan kuesioner semi-struktur untuk konsultan, peneliti teknologi RFID dan manajer rumah sakit berkatagori besar di Pulau Jawa. Manfaat-manfaat dan hambatan-hambatan dari pengadopsian teknologi RFID telah diidentifikasi dari studi literatur. Hambatan dari pengadopsian teknologi RFID dibagi menjadi dua (2) aspek yaitu hambatan dari aspek bisnis dan teknologi. Temuan dari studi ini meyakini bahwa manfaat dari pengadopsian teknologi RFID didominasi oleh manfaat yang bersifat intangible. Sebagian besar responden meyakini bahwa hambatan utama dari pengadopsian teknologi RFID adalah: (1) kompleksnya teknologi RFID, (2) ketiadaan informasi yang lengkap dan valid, (3) tidak tersedianya anggaran yang cukup. Detail dari hasil studi dan implikasinya akan didiskusikan selanjutnya.

Kata kunci: Pengadopsian teknologi RFID, Rumah sakit, Indonesia, Eksploratori.
Ba, Japanese-Style Knowledge Creation Concept: A Building Brick of Innovation Process inside Organization
Authors: Pribadi Henry
Published: November 2023

Survival of a firm in industry will be primarily determined by how efficient it can harness competitive advantage from innovation process. Innovation process itself has strong correlation with knowledge creation, and to understand about innovation, people must understand about knowledge creation process. By successfully harnessing knowledge, people can use those resources to create some innovation product or service that in the end will provide competitive edge into the company. Unfortunately, not much research can be sought to provide more insight on the creation of knowledge inside a company. This paper explores about interesting concept of knowledge creation in Japanese term, which is called as “ba”. Ba concept can be used to describe how tacit knowledge and casual knowledge can be harnessed into a useful knowledge which in turn will be transformed into innovation process. This paper will briefly give some introduction about ba concept and how it is related to innovation process. A brief study of one multinational company will be used to describe how concept of ba is applied in understanding the success story of innovation from knowledge creation.
SISTEM PENGENDALIAN KUALITAS DENGAN BANTUAN EXPERT SYSTEM UNTUK MENURUNKAN TINGKAT KECACATAN PRODUK (Studi Kasus di Perusahaan Pembuat Filaman Lampu)
Authors: Yuliana Shelly , Christian Palit Herry , Milawati Claudina
Published: November 2023

The research discusses the quality control system in producing lamp filament. Meantime, the quality control system produces ahigh level of failure, 10-17%. The result of the identification revealed that the primary coil and double coil processes have the highest failure, ± 17%, and the main cause of rejection is the unflat coil. The research covers the development of attribute control chart (p chart), before and after implementations, development of control plans and documents needed, expert system program to investigate the root cause of the failure, proportional test and final result failure. The result of the implementation of suggestion, gives a significant decrease of failure and the average of failure level of the final product is average 5.74%.

Abstract in Bahasa Indonesia :

Penelitian ini membahas sistem pengendalian kualitas pada pembuatan lampu filamen. Sistem pengendalian kualitas yang berjalan sekarang menghasilkan kecacatan yang tinggi, 10-17%. Identifikasi yang telah dilakukan menunjukkan bahwa proses primary coil dan double coil memiliki tingkat kecacatan terbesar ± 17% dengan penyebab utama reject adalah coil tidak rata. Penelitian yang dilakukan meliputi pembuatan dan monitoring peta kendali atribut (p chart) baik awal dan akhir hasil implementasi usulan, pembuatan control plan, dokumen-dokumen terhadap pengendalian penyebab kecacatan utama, program expert system yang digunakan untuk penelusuran penyebab kecacatan, uji proporsi dan tingkat kecacatan akhir. Hasil implementasi usulan memberikan penurunan tingkat kecacatan yang signifikan terhadap penyebab kecacatan utama dan rata-rata tingkat kecacatan produk akhir sebesar 5,74%.

Kata kunci: sistem pengendalian kualitas, expert system.
PERANCANGAN TATA LETAK FLEKSIBEL DENGAN TEORI GRAPH
Authors: Ristono Agus
Published: November 2023

In this paper, plant layouts is designed by considering the influence of the environment, i.e., the variability of demand. It also considers the new Total of Material Handling Cost (TMHC), which captures the inventory carrying costs. Moreover, the comparison between the distributed and the modular layout performance is presented. Those two types of layout are called as the next generation layout. It shows that the modular layout, which is done by using graph theory, i.e., modified Hamiltonian chain, gives flexibility as good as the distributed layout.

Abstract in Bahasa Indonesia :

Dalam makalah akan dipaparkan suatu rancangan tata letak yang memperhatikan pengaruh dari lingkungan berupa permintaan yang selalu berubah dari waktu ke waktu. Selain itu digunakan juga ukuran Ongkos Material Handling (OMH) yang baru dengan mengakomodasi ongkos simpan selama penanganan bahan. Selanjutnya diberikan juga perbandingan performansi antar tata letak generasi baru, yaitu tata letak terdistribusi dan tata letak modular. Hasil penelitian menunjukkan bahwa tata letak modular dengan menggunakan teori graph, yaitu rantai Hamilton yang dimodifikasi, dapat dikatakan sama fleksibelnya dengan tata letak terdistribusi.

Kata kunci: tata letak terdistribusi, tata letak modular, Total Ongkos Material Handling (TOMH), tata letak generasi masa depan
DESAIN DAN PEMBUATAN ALAT PENGGILING DAGING DENGAN QUALITY FUNCTION DEPLOYMENT
Authors: Ongkodjojo Stefanus , Anson Charles , Tjitro Soejono
Published: November 2023

Quality Function Deployment (QFD) is a powerful development methodology with a wide range of applications. This paper presents a simple case using QFD on the design, detail, and process phase of a Meat Grinder product as a tool of improvement for hygienic of the Meat Grinder. The main purpose of QFD in this study was to apply in construction a method of customer-oriented design used in other industries, and to adapt some of the tables and matrices. Another purpose of this case study was to test the applicability of QFD in the design and process planning of a Meat Grinder. The developed prototype was chosen to be the screw part as the main part of the Grinder and a significant achievement was made on the improvement of hygienic, noted on less corrosive material selected of aluminum alloy 514.0 and improvement of surface roughness of 62.2%.

Abstract in Bahasa Indonesia :

Quality Function Deployment (QFD) adalah metodologi pengembangan yang cukup handal dengan rentang aplikasi yang luas. Makalah ini mempresentasikan kasus sederhana penggunaan metode QFD pada tahapan desain, detail dan proses produk penggiling daging sebagai alat untuk meningkatkan higenitasnya. Tujuan utama dari QFD pada studi ini adalah untuk menerapkan desain yang berorientasi pada pelanggan dengan mengadaptasi beberapa matriks dan table pada tahapan-tahapannya. Tujuan yang lain yaitu untuk menguji kemampuan QFD pada proses perancangan sebuah penggiling daging. Prototipe yang dipilih untuk dikembangkan yaitu bagian ulir sebagai bagian utama dari sebuah penggiling daging dan hasil yang cukup signifikan telah didapat pada hal higenitas, ditandai dengan terpilihnya material yang kurang korosif yaitu paduan aluminium 514.0 sebagai material yang digunakan serta perbaikan nilai kekasaran permukaan sebesar 62.2 % dari produk yang telah ada dipasaran.

Kata kunci: quality function deployment, the house of quality, penggiling daging.
APLIKASI SIX SIGMA PADA PRODUK CLEAR FILE DI PERUSAHAAN STATIONARY
Authors: Emilasari Desy , Vanany Iwan
Published: November 2023

This paper describes the application of the Six Sigma methods is used in order to improve quality in manufacturing company that produce stationary product. DMAIC approach is utilized to analyze and improve 'Pocket Clear File' product since this product has more variability and defects. Quality improvement also monitor the process that influenced pocket defect in Bag Making, Kami-ire, Karidome, and Pocket after Karidome Inspections section. Determining of Six Sigma project is based in process and defect type in each section. FMEA also gave the recommendation for quality improvement we need to evaluate the final result of the improvement since some of them were not working properly.

Abstract in Bahasa Indonesia :

Paper ini menggambarkan bagaimana aplikasi metode Six Sigma digunakan untuk melakukan perbaikan kualitas pada perusahaan manufaktur yang memproduksi produk stationary. Pendekatan DMAIC dipakai untuk menganalisa dan melakukan perbaikan produk 'Pocket Clear File' karena tingginya variabilitas dan cacat dibanding produk lain. Perbaikan kualitas juga memperhatikan proses yang mempengaruhi terjadinya cacat pocket pada section Bag Making, Kami-ire, Karidome, dan Pocket after Karidome Inspection. Penentuan proyek Six Sigma didasarkan atas proses dan jenis cacat pada setiap section. Pendekatan FMEA mampu memberi rekomendasi perbaikan kualitas. Evaluasi dari hasil perbaikan penting untuk dilakukan karena beberapa implementasi perbaikan kualitas tidak berjalan sesuai dengan rencana.

kata kunci: six sigma, DMAIC, perusahaan stationary.
USAHA PENURUNAN PERSENTASE CACAT RING PISTON TIPE 4JA1 PADA PROSES HABANAKASHI MESIN BESLY
Authors: Wibisono E.V. Yuliana , Aritonang Y.M Kinley , Wibisono Yogi Tusuf
Published: November 2023

One of the programs that can be used to improve the quality is Six Sigma program using DMAIC method. The research is performed at PT Baninusa Indonesia (PT. BN) producing the 2nd type of 4JA1 piston ring. The program is implemented to decrease the defect proportion The production process performance and the problem priority are known from the CTQ itself. The fish bone diagram is used to determine the causes of the problem. The improvement is performed by determination of the best process parameter through the fullfactorial experiment design. The result is significantly decrease defect proportion by 2.682%.

Abstract in Bahasa Indonesia :

Salah satu program peningkatan kualitas yang dapat mengakomodasi tuntutan peningkatan kualitas adalah program Six Sigma dengan menggunakan metode DMAIC. Penelitian dilakukan pada PT.Baninusa Indonesia (PT.BN), salah satu perusahaan yang memproduksi produk ring piston tipe 4JA1 jenis 2nd ring. Program digunakan untuk menurunkan persentase cacat produk. Dari CTQ yang ada dapat diketahui kinerja proses produksi saat ini dan prioritas permasalahan. Fish bone diagram digunakan untuk akar penyebab masalah Tindakan perbaikan yang dipilih adalah menentukan parameter proses terbaik dengan menggunakan metode eksperimen full factorial. Hasil penerapan parameter proses tersebut menunjukkan pengurangan yang signifikan terhadap persentase cacat sebesar 2,682%.

Kata kunci: metoda six sigma, DMAIC, perbaikan kualitas, karakteristik kualitas kritis, diagram fish bone.
IMPLEMENTASI METODE 5S PADA LEAN SIX SIGMA DALAM PROSES PEMBUATAN MUR BAUT VERSING (Studi Kasus di CV. Desra Teknik Padang)
Authors: Adriansyah Adriansyah , Muchtiar Yesmizarti , Noviyarsi Noviyarsi
Published: November 2023

The objective of this research was to minimize processing time in manufacturing using 5S (Seiri, Seiton, Seiso, Seiketsu, Shitsuke) method. As well as quality, processing time is one of the important points to consider. Improvement had been done in every step of the process to achieve 3.4 defect per million (DPM). Although 6s had not been achieved yet, but 5S method in Lean Sigma have already improved the production process

Abstract in Bahasa Indonesia :

Penelitian ini bertujuan untuk memperlihatkan penggunaan Metoda 5S (Seiri, Seiton, Seiso, Seiketsu, Shitsuke) dalam meminimalkan waktu proses pembuatan produk. Selain kualitas produk, waktu proses merupakan hal yang penting untuk diperhatikan. Perbaikan dari setiap proses dilakukan agar didapat 3,4 kegagalan persejuta (DPM). Walaupun 6s belum tercapai, tapi penerapan metoda 5S dalam Lean Sigma sudah menunjukkan perbaikan pada proses yang dilakukan.

Kata kunci: 5S, six sigma, lean sigma