bluuebunny/crossref_metadata_2025 huggingface dataset:
Strategies for Improving the Quality of Logistics Courier Services Through Priority Problem-solving Based on Multiclass Classification
Authors: Hendayani R , Dharmawan M C
Published: August 2020

PT Tiki Jalur Nugraha Ekakurir (JNE) is the most popular courier service in the country and ranked the first in the category of courier service companies in Indonesia Top Brand 2018. Despite being a top brand, JNE still faces a variety of complaints posted by customers on the internet and social media. This makes it interesting to study as a means of evaluating and finding strategies to improve the quality of logistics services using a sentiment analysis method with classification models of Naive Bayes Classifier and Support Vector Machine as well as multiclass classification. This study aims to review and determine which classification model is the most appropriate for the dataset, find out the rating of sentiments and dimensions in order to measure the quality of logistics company services and identify what problems need to be prioritized. The population in this study are all the tweets mentioned to JNE’s Twitter accounts. Tweet samples in this study were collected over a 30-day period, from 1 September 2019 to 30 September 2019, totalling 11,134 tweets. This study revealed that JNE is dominated by negative sentiment of 97.82% and positive sentiment of 2.18%. The main problems (high priority) faced by JNE are the dimensions of Personnel Contact Quality and Timeliness. Then, the dimensions of Information Quality, Order Discrepancy Handling and Order Accuracy are problems with medium priority. Meanwhile, JNE’s low priority issues are the dimensions of Order Conditions, Ordering Procedures, Ordering Release Quantities, and Order Quality. Therefore, JNE needs to improve the examination of personal messages and provide a quick response to complaints about customer problems and increase commitment in every delivery service to match the estimated delivery time. It is recommended in future studies to apply the Naive Bayes Classifier classification model in Twitter dataset processing because it has fast, good, and quite precise processing results. Future research can also use the application of ABC analysis which can be used as a basis for determining the number of priority dimensions of a service’s problem solving.
The Designing of Warehouse Management Information System
Authors: Fauzan R , Shiddiq M F , Raddlya N R
Published: August 2020

Warehouse Management Information System or WMIS primarily aims to control the movement and storage of materials in the warehouse and process related transactions, including sending, receiving, storing, and taking. This research has the objective to analyze the running system and design a warehouse management information system in Zaeni Convection. The development methodology used is Rapid Application Development with an object-oriented approach. While the tools used in design are UML (Unified Modeling Language). Problems in the Zaeni Convection are; there is no automatic calculation of raw materials, the process is not yet maximized to regulate the entry and exit of goods, there are no reports on inventory and expenditure of goods, and there is no computerized data storage. In designing a warehouse management information system, there are four actors involved namely Owner, Warehouse Section, Production Manager and Supplier. There are four function that are described, including: Ordering of Raw Materials, Purchase Orders, Production, and Management of Finished Goods. Based on this research, it can be concluded that the results of the warehouse management information system design can be a solution for the process of managing goods at Zaeni Convection
Forward Engineering in Student Mark Recapitulation Application
Authors: Mauluddin S , Sidik R
Published: August 2020

This research intends to carry out forward engineering of the student mark recapitulation application in the information systems department, Universitas Komputer Indonesia. The forward engineering is the final step of the reengineering process in the mark recapitulation application. Re-engineering is done because the student mark recapitulation application cannot function properly. This re-engineering used the big bang approach, which is to rebuild or change the entire existing system, while the forward engineering stage follows the stages of the general model of re-engineering software, namely conceptual, requirements, design, and implementation. The conceptual and requirements stages have been carried out in previous reverse engineering research, so that in the forward engineering the research phase will start from the design stage then proceed to the implementation phase. The programming language in the existing application uses visual basic and the new application will be rebuilt using the java programming language. The results of this study are the student mark recapitulation application which has nine functions, namely lecture management, curriculum management, student management, import mark, mark management, system settings, temporary transcript printing, final transcript printing, and graduation certificate printing. Based on the results of tests on several computers with different operating systems, this application can function properly as expected.
Enterprise Architecture Planning for Enterprise University Information System Using the TOGAF Architecture Development Method
Authors: Ulmi U , Putra A P G , Ginting Y D P , Laily I L , Humani F , Ruldeviyani Y
Published: August 2020

One of the important strategies in dealing with the development of information technology is the usage and increase of information systems support for the enterprise. Enterprise University Information System (EUIS), a product released by the University of Indonesia Computer Science Center, is a cloud-based system that can help the academic community-run main and supporting processes with data that can be tracked in real-time. EUIS is currently used by several clients. In the future, the company is targeting technological developments in EUIS that can be used by many other universities, so it can be easily adjusted and integrated with existing information systems at the client. Therefore, an update of enterprise architecture is needed to support the alignment of IT with existing business needs. The enterprise architecture design method used in Enterprise Architecture Planning (EAP) with the Open Group Architecture Framework (TOGAF). In this research using a qualitative methodology, TOGAF ADM can assist in planning architectural changes from monolithic to micro services by identifying several scenarios. The results showed that the decentralized microservice architecture design can be applied to EUIS. Pusilkom UI currently has implemented this design with a client that has condition 2, so that further research can be tested for other conditions.
The Dual-Protocol of the Internet of Things (IoT) Platform for Environment Monitoring System
Authors: Mulyana A , Ualubun JA
Published: August 2020

The purpose of this study is to create an air pollution monitoring system that has an adaptive capability in the place where the device is used so that it can send data to the server. The method used is to detect GSM signal levels that exist at the place where the device is used, and based on the rules specified then the selector unit will make the selection of the appropriate communication protocol according to the situation, whether using HTTP or MQTT. Based on testing for data transmission, MQTT protocol is more reliable in areas outside cities with low GSM signal levels. Under these conditions, the system is able to pass the selection of protocols correctly so that the system is able to work optimally in sending data. The usefulness of this research is to support reliability in the delivery of devices that work with the principle of internet inf things.
The Open Group Architecture Framework for Designing the Enterprise Architecture of ALIT
Authors: Eskaluspita A Y , Sumitra I D
Published: August 2020

This research purpose is to analyze and developing business value also existing information system at Laboratory Unit of Telkom University Applied Science School. The method used is The Open Group Architecture Framework (TOGAF) with the Architecture Development Method (ADM). Among 8 phases of TOGAF ADM, it will be used 4 phases, start from Preliminary, Architecture Vision, Business Architecture, Information System Architecture, and last Technology Architecture. The result of this research is the blueprint contains an enterprise architecture for developing ALIT so that it can support the business processes that exist in the Laboratory Unit and furthermore in the future also achieve their strategic goals. This blueprint of enterprise architecture can be applied in the same unit that have similar business process, specially the unit that focused on laboratory and practicum. But in this research focused on laboratory unit at Telkom University. This research also concludes that using TOGAF ADM as a methodology tool can produce a design architectural models in general accordance to organization’s vision and mission. The impact of this research is a solution to business processes problem, data loss, and unintegrated data during business activity. Especially the main problem is the manual processes implemented there and the information system that may not support it fully so impacted to its business process.
Development of Software Quality Assessment Model for Mobile-based Elderly Fall Detection Software
Authors: Finandhita A
Published: August 2020

The purpose of this research is to build a software quality assessment model to evaluate the quality of mobile-based elderly fall detection software. The assessment is based on the quality factors found in the software quality model. The quality factor is adjusted to the characteristics of the software. The model is needed because the software has its own characteristics. This research consists of several stages. The first thing to do is analysing the software domain to determine its characteristics. The second is defining the software assessment needs by mapping software characteristics with the quality standards used (ISO / IEC 25010: 2011) to obtain the appropriate quality factors. The software quality metrics is determined after the quality factors is obtained. The metric to be used is Goal Question Metrics (GCM). The third is software quality weighting process, including its criterias and sub-criterias. Determination of the equation for software quality assesment is the final stage of the research. Based on the reseach process, it can be concluded that the model developed successfully can be used to assess the software.
Model Design of Accounting Information Systems for Village Owned Enterprises (BUMDes)
Authors: Supriyati  , Bahri Ramadhan S.
Published: August 2020

Village-Owned Enterprises as a benchmark for the pillars of the village economy in Indonesia today, in the Era of the Industrial Revolution 4.0 have used technology to run their businesses to win digital competition. However, today’s village-owned companies not only require improvements and preparations in terms of technology, but for village-owned companies that have responsibilities and performance that need to be made in an accounting information system that is in accordance with the accounting standards required. Based on this discourse, the writer has the goal of creating an Accounting Information System Design Model for Village-Owned Enterprises that can become a potential village-owned company as a Human Technology in winning the Digital Competition. The research method used is a qualitative research method with descriptive methods and research methods, which are supported to obtain valid data with related parties as managers and development of accounting information systems from Village-Owned Enterprises, data collection techniques used are interviews, observation and interaction. As a result of the Accounting Information System Design Model for Village-Owned Enterprises as human technology to obtain digital competition can understand the business process of Village-Owned Enterprises and optimize existing infrastructure through the Village-Owned Business by design Use Case Diagram, Activity Diagram and Entity Relationship Diagram. Meanwhile, to find out tangible assets and intangible assets consisting of human resource competencies owned by Pagerwangi Village, liabilities, equity, revenue, cost and expense, can be seen from accounting cycle at Financial Statement in the accounting information system for village-owned companies. The result from Financial statement are Activities Statement, Statement of Financial Position, and Cash Flow Statement.
The Selection of the Correct Accuracy Level Using The Optimal Precision and Accuracy Method
Authors: Kerlooza Y
Published: August 2020

This research discusses the importance of selecting the correct value of sensor precision and computational accuracy in production equipment in coffee farmer cooperatives. Accuracy levels that are too low or too high will reduce the effectiveness of mechanization and automation in this field. This research used The Optimal Precision or Accuracy method which based on MSB-First Interval Bounded Variable Precision (MFIBVP) technique. Based on data obtained during the survey in this study, the optimal precision level curve is obtained, so that the optimal precision level can be determined in sub processes that are naturally difficult to determine. In conclusion, the Optimal Precision and Accuracy Method can be used to determine the right accuracy level needed at each stage of the process in a production system
Human Detection and Avoidance Control Systems of an Autonomous Vehicle
Authors: Nizar T N , Hartono R , Meidina D
Published: August 2020

A long-range and short-range navigation systems of an autonomous vehicle are the most important thing to develop because it is very complex and related to safety in the driving of an automatic vehicle. The purpose of this research is to develop a short-range navigation system for autonomous vehicles focused to detect and avoid humans which implemented on an autonomous vehicle prototype. Image Processing and deep learning algorithm used for human detection and ultrasonic sensor used for distance calculation. Decision making for human avoidance system using the Fuzzy algorithm based on the position of detected human and human distance. The implemented system has a success rate of 85.71% to avoid human which ideal distance more than 2 meters. The implemented prototype of an autonomous vehicle can be implemented in the real vehicle with some adjustments in the sensor and hardware system, however, the systems are expected to reduce traffic accidents caused by human error.
Design and Implementation of Doorcam in Home System using Raspberry Pi
Authors: Lestariningati S I
Published: August 2020

This paper discusses how to develop a doorcam system that is implemented at home at an affordable price. The system was built using a Mini PC Raspberry Pi, and a Pi camera to obtain an affordable price for the doorcam system implementation. The results of tests that have been carried out were the system had succeeded in notifying the homeowner when there were guests who were visiting the house. The system will send a notification message and display the image captured by Pi camera via the Telegram application when the guest press bell button. The system worked with delay below 5 seconds. This system can work well when done during the daytime, because the Pi camera used is not equipped with lights, so the captured images that are sent cannot show guests coming to visit in front of the house.
Build a Microcontroller Based Interactive Module as A Learning Medium in Vocational Secondary Schools
Authors: Kurniawan B
Published: August 2020

The purpose of this research is to build an interactive and complete module to be used as a learning medium at the vocational secondary school level. The prototype method is one of the ways that can be used to build microcontroller modules to suit your needs. The prototype methods include communication, planning, modeling, construction, and development. Microcontrollers are one of the learning media that has a high level of difficulty in understanding each device’s usage. The trainer module that has been circulating in the market and the students are still not complete and not interactive. During this time, the microcontroller module used focuses on the creation of microcontroller trainer modules using dot matrix, keypad, LCD, digital I/O, and traffic light. In building a complete and interactive microcontroller module, it takes an appropriate method to construct it. Meanwhile, the media needs learning with the development of technology requires a more complete module in addition to the components that are already used in general. In the design of an interactive module, the microcontroller used to have more complete devices including additions to servo motors, potentiometer, temperature sensors, proximity sensors, DC motors, and the addition of WiFi modules as a complete facility of interactive microcontroller modules. The results showed that the features offered had a 50% more complete compared to previous microcontroller modules, and more interactive could use WiFi networks. With the more complete a microcontroller module, it can be easier for students to understand each implementation and can improve the competency of the students in the use of microcontrollers.
Study and Performance Evaluation Binary Robust Invariant Scalable Keypoints (BRISK) for Underwater Image Stitching
Authors: Jatmiko D A , Prini S U
Published: August 2020

In this paper, performance evaluation of Binary Robust Invariant Scalable Key points (BRISK) for underwater image stitching is presented. Underwater image stitching is quite challenging because usually images produced by underwater cameras have few features and noise such as motion blur and underexposure. In this paper, we proposed a robust algorithm for the underwater image stitching which consists of several stages: taking an image frame, getting a key point using BRISK, feature matching using Random Sample Consensus (RANSAC), homography estimation, and perspective warping. The experimental result shows that the proposed algorithm can be implemented for underwater image and achieve better matching results even the less detected keypoints.
Development of Automatic Health Testing Measurement Model for High School Students in West Java
Authors: Herdiana B , Ridwan A
Published: August 2020

The main objective of this research is to develop the accuracy of health test equipment to measure height, weight, and heart rate to support the qualification of graduation standards at competitions. Any competency competitions that include high school students as participants must be fully followed by students who have qualified passing standards following predetermined conditions in which one of the qualifications is a health graduation test. The focus of the object under study was to obtain the validity of the height, weight and heart rate assessment as the assessment data to measure the health graduation standard in a competency competition. The acquisition of these data will be done by an empirical method of quantitative approaches is through comparison techniques, measurement, and calculation technique through field observations. The importance of the three objects of this study was analyzed because it impacts the feasibility of a student to follow the race so it is expected to minimize the of error and cheating. The emergence of these problems cannot be separated from the small standard of accuracy resulting due to how to get data and techniques to operate the system is still manual so often the mistakes and cheats that affect the low quality of the race. Therefore, this study developed a model of automatic health test testers that can be integrated digitally through the touchscreen LCD and smartphone device. The goal is to make it easier for users to operate the system and obtain data access speed with a guaranteed accuracy value of less than 2%. The final result of the test and measurement for 5 students as the object of research showed the average measurement error for height, body weight and heart rate below 2%, so it can give positive contribution and validity of the data that is responsible in determining the graduation of a student candidate competitor of high school student competence. The results of the development of this measuring tool model make it easier for people to know the level of graduation accurately and have an impact on the smaller number of errors during a health test and are able to reduce fraud.
Analysis of the Effect of Web-Based Information System
Authors: Soegoto E S , Ma’wa L F
Published: August 2020

The purpose of this research is to analyze and find out how influential web-based information systems are on the promotion of a trading product. The methods used to conduct this research were descriptive and interview methods. The results of this study could be concluded that the web-based information system influenced the promotion carried out by a company. Web-based information systems are currently widely used to search for product information, although there is an Android-based information system that is also quite familiar among the people to search for product information but cannot replace the web-based information system. Therefore, web-based information systems can influence the promotion of a product because many consumers search for product information through web-based information systems.
Web Based Online Inventory Information System
Authors: Soegoto E S , Palalungan A F
Published: August 2020

This study aims to show the use of a web-based online inventory system to maximize human performance in the work process in companies. This study used descriptive method by reading related literatures. From this research, show about web-based online inventory system is an innovation in facilitating the management of goods, helping to make complicated things easier, this is good news for large companies in running their businesses, no wonder many companies are using online inventory systems to help work. Companies that use online inventory systems are competing in developing their existing inventory systems so they can better support the company’s work.
Hydroponic Technology in Agriculture Industry
Authors: Prayoga I , Putra R A
Published: August 2020

The purpose of this study is to describe hydroponic vegetable products and analyze the marketing communication strategies of hydroponic vegetables using the marketing mix method. The result of this research showed that hydroponic technology was a method of farming using water media without soil media. This is done because the function of the soil as a supporter of plant roots and an intermediate nutrient solution can be replaced by streamlining or adding nutrients, water and oxygen through the media. With this technology, eating becomes a problem for producers to create marketing communications to attract consumers’ attention to this hydroponic vegetable product. It can be effective if marketing objectives can be achieved or beneficial to consumers, especially conventional farmers in the application of the function of hydroponic technology.
Desktop Based Application for Inventory Management
Authors: Soegoto D S , Nugraha R F
Published: August 2020

The purpose of this research is to describe the importance of inventory management software. This research was conducted to solve the problem that was happening at a certain company in Bandung. This study used descriptive qualitative method with the company as a case study, the first stage was to collect the necessary data, processing it, and then discussing it to reach a conclusion. The results of this study are obtained data such as the name of the borrower, the date of the loan, the date of return. From the current problem, the inventory management system is important in companies in order to manage items effectively thus increasing the productivity of the company.
The Effect of Computer-Based 3D Visualization
Authors: Ramadhanty D M , Handayani T
Published: August 2020

Along with the development of technology, the world of architecture is making rapid progress, including in the technique of making images. There are many 2D and 3D based computer application programs. In this research, 3D application program was chosen to determine its effect on the design work and see how the images produced by this application. This study used descriptive qualitative method with references to journals, books, and previous studies. In addition, 3D image creation is done using an application to see the results of visualization using a computerized method, the AutoCAD application is used to create a basic image then the Lumion application is chosen as a second party application to see the final result. The advantages of making computer-based drawings are to cut work time, simplify the presentation of images, and simplify work, while the drawback is that it is unflexible to make sketches such as drawing manually using a pencil, besides that the application does not guarantee data stored in situations such as a computer that suddenly lose power when working. Unmanaged work occured due to the inactivity of the autosave feature on the computer. The result of making this 3D image is a building that is easy to be given material and color, and the resulting image looks quite real.
Recycled Wood Technology for Wall
Authors: Hafilda H , Hardoyo A B
Published: August 2020

The purpose of this research is to discover how to identify the specification of wood wasted wall that can be used to comfortable wall and to determine the potential of wood waste as a building wall and its effects to user comfort. This research used descriptive qualitative method and literary study, it is hoped that this research can provide a picture of the application of wood waste as a wall which is also equipped with phenomena that occur in society, especially in Indonesia. The results are the methods of finding out how wood in general has the ability as an insulator that can inhibit heat transfer, so that it can affect the air temperature of a room and give effect to the comfort of space and improve building performance through passive design. Stressing levels will be different from experiments conducted on participation with various wood waste walls of different thicknesses and various colour of wood. Wood waste is not only can be used as firewood, but can also have added value through its use as a wall that has functional and aesthetic value with good and proper processing.
Designing Friendly Environment for Pedestrian by Visual Perception
Authors: Pelayati A , Andriani D
Published: August 2020

The purpose of this research is to design an environmentally friendly pedestrian facility by visual perception. One of the most important facilitied is a road for pedestrians. We can see that the current expansion of roads has caused a reduction in green areas and many pedestrians are displaced, causing pedestrians are choosing to use private vehicles which results in traffic density. The method used in this research is analysis descriptive method. So far, most people do not pay attention to the pedestrian facilities such as for their safety, security, comfort, and beauty. Therefore to overcome them it is necessary to redesign road facilities, including improving service facilities. By redesigning pedestrian facility services, it is expected to improve the safety, security, and comfort.
Land Use Change and Suitability Analysis in Coastal Area
Authors: Warlina L , Ikhsan A
Published: August 2020

The research objective is to identify land-use change and suitability analysis of spatial use with land use policies and planning of the built-up area. The research location is in Tanjungpandan coastal area. Tanjungpandan is the capital of the Belitung Regency, which is the center of the economy of the region. The research method used was the overlay technique to determine changes in land use in coastal areas in 2010 and 2019. We conducted direct observation and interviews to analyze existing spatial use with spatial planning and policy. We found that the built-up areas had increased by 171 hectares. About 75% or 128 hectares of the built-up area was in Desa Air Saga. The suitability level of spatial use as built-up areas in the Tanjungpandan coastal area was relatively suitable with the spatial plan. There is only one village, namely Desa Tanjung Pendam that its spatial use exceeded its plan. There is compliance with spatial use in Tanjungpandan coastal area. This finding can be used as a recommendation to local governments to manage built-up coastal areas.
Product Quality Improvement by Using the Waste Assessment Model and Kipling Method
Authors: Robecca Julian , Made Aryantha Anthara I , Silaban Monalisa , Situmorang Maureena Ronahot
Published: August 2020

This study aims to identify waste, calculate the value of waste that occurs and provide suggestions for improvement to reduce waste. VSM describes the production flow and waste information that occurs, while WAM is the method used to calculate the waste assessment. Proposed improvements to reduce waste that has occurred using the Kipling Method. There are 6 types of waste that occurs. Waste assessment results that have been sorted in the production process are defect, motion, overproduction, transportation, waiting and process. This sequence is based on the largest weight to the smallest weight. For improvement proposals are prioritized for the type of waste with the highest rating weighting, namely defects. This shows that the defect is the type of waste that most influences the production process, making it easier to explore the cause of the problem and the advice that will be given to reduce the defects that occur. The company should make a visual form of the defect category so that the implementation of the recommendations for improvement can be applied and the operator can find out the true form of disability. It is expected that the proposed improvements can reduce the number of defects and meet the production targets achieved.
An Analysis of the Determining Factors of Mobile Banking Adoption in Islamic Banks
Authors: Yussaivi A , Suhartanto D , Syarief Moch. Edman
Published: August 2020

This research is conducted to investigate the factors that influence the attitudes and perceptions of digital natives in using mobile banking and artificial intelligence (AI)-enabled mobile banking. Partial least squares were applied to examine the differential effects of technology-based (i.e. attitudes toward AI, relative advantage, trust, security in specific mobile banking activities), non-technology based (i.e. the need for service, quality of service) and religiosity. This study utilizes 339 digital native respondents. The questionnaire distributed to Islamic banking customers in three cities in Aceh Province, Indonesia. The study results the perceived trust construct, and the security in specific mobile banking activities is the major determinant of mobile banking adoption intention and also indicates a divide in how digital natives perceive the perceived trust between two dependent variables. Then the relative advantage construct has the most impact on mobile banking usage. However, the relative advantage was not significant for AI-enabled mobile banking. For managerial practices, this study provides guidelines for Islamic bank management to improve the trust, security and relative advantage of their mobile banking services as a strategy for developing the sustainability of the business.
Design for Human Safety and Health in Manufacturing System
Authors: Henny H , Jaelani A , Haryanto H , Andriana I
Published: August 2020

The purpose of this research is to make a tool designed to assist workers in carrying out production activities and prevent work accidents caused by machinery. The method used in this study is the Ulrich method. Ulrich method that used in this research is to explain the steps in designing a product. The results obtained in this study are 12 concepts available. These concepts must be evaluated and filtered very carefully to get maximum results. The Pugh method is used to assist in the process of evaluation and screening of concepts so that the 3 selected concepts will be developed. Concept evaluation for the three selected concepts must be done by comparing the rank and weight value of each concept to make it easier to use formulas so that it can help in the assessment process. One concept chosen will be used to design the product. The conclusion is in designing a product, several phases must be passe so that the results obtained will be satisfying and in accordance with the references used. The benefit that will be felt with this tool is that workers can avoid work accidents and work becomes easier to improve the production process.
Magnetoresistance effect in a vertical spin valve fabricated with a dry-transferred CVD graphene and a resist-free process
Authors: Sharma Pradeep Raj , Gautam Praveen , Nam Jungtae , Kim Keun Soo , Noh Hwayong
Published: August 2020

One of the most prominent and effective applications of graphene in the field of spintronics is its use as a spacer layer between ferromagnetic metals in vertical spin valve devices, which are widely used as magnetic sensors. The magnetoresistance in such devices can be enhanced by a selection of suitable spacer materials and proper fabrication procedures. Here, we report the use of dry-transferred single- and double-layer graphene, grown by chemical vapor deposition (CVD), as the spacer layer and the fabrication procedure in which no photo-resist or electron-beam resists is used. The measured maximum magnetoresistance of NiFe/CVD-Graphene/Co junction is 0.9% for the single- and 1.2% for the double-layer graphene at 30 K. The spin polarization efficiency of the ferromagnetic electrodes is about 6.7% and 8% for the single- and the double-layer graphene, respectively, at the same temperature. The bias-independent magnetoresistance rules out any contamination and oxidation of the interfaces between the ferromagnet and the graphene. The magnetoresistance measured as a function of tilted magnetic field at different angles showed no changes in the maximum value, which implies that the magnetoresistance signal is absent from anisotropic effects.
Microstructural properties and peritectic reactions in a binary Co–Sn alloy by means of scanning electron microscopy and atom probe tomography
Authors: Khushaim Muna , Alahmari Fatimah , Kattan Nessrin , Chassaing Delphine , Boll Torben
Published: August 2020

Recent studies of lithium-ion batteries suggest that the use of binary CoSn alloys as anodes should provide an improvement over currently used anode materials. However, the implementation of CoSn alloys is challenging due to uncertainties regarding the phase transformations within this system. In order to understand these, we evaluate the compositions of different intermetallic compounds produced via the peritectic reactions, nucleate and grow within the microstructure of binary Sn − 25 at.% Co by employing atom probe tomography (APT). The stoichiometric

CoSn

phase, which is produced upon the cooling of the melt, is not only found as part of the peritectic solidification sequence but also as clusters within the pure Sn phase. The

CoSn

2

phase was found as a nano sized layer and is attributed to the peritectic reaction between the

CoSn

phase and the pure Sn phase. The production of the

CoSn

3

compound was enhanced by the phase transformation of the

CoSn

2

phase. Furthermore,

CoSn

3

clusters had formed in the pure Sn phase. A limited solubility within the pure Sn phase was also determined to be (0.6 ± 0.1) at.% Co.
An EXAFS spectroscopic study of Europium (III) complexation with dafone
Authors: Shahedi Abdolhamed , Rahighi Javad , Bolorizadeh Mohammad Agha
Published: August 2020

An extended x-ray absorption fine structure (EXAFS) for LIII Eu crystal edge at 6977 eV energy was studied on an original complex based on europium. The ligand was coordinated entirely with respect to europium atom for [Eu(dafone)2Cl2.(H2O)2](Cl)(H2O), where dafone is 4,5-diazafluoren-9-one. The EXAFS spectra showed close-neighbor correlations between europium and nitrogen atoms as well as to the adjoining carbon backbones on macrocyclic cages, which resulted in the bond lengths, the Debye-Waller factor, and coordination numbers. The Eu (III) complex in vitro antibacterial efficacy on a set of Gram-negative bacteria and Gram-positive bacteria showed that the complex displays marked antibacterial behavior. The minimum complex inhibitory concentrations showed that the Eu complex displays significantly higher antibacterial impact on conventional Staphylococcus aureus and Escherichia coli bacterial strains compared to those of silver sulfadiazine and europium nitrate. The Eu (III) bacterial inhibitions are closely linked to relevant DNA binding affinities.
Facile synthesis of cetyltrimethylammonium bromide-loaded mesoporous silica nanoparticles for efficient inhibition of hepatocellular carcinoma cell proliferation
Authors: Ai Fulu , Zhao Guohua , Lv Wu , Lin Jie
Published: August 2020

We report the synthesis of cetyltrimethylammonium bromide (CTAB)-loaded mesoporous silica nanoparticles (MSNs) as efficient anticancer agents. The chemical composition and structure, drug loading capacity, and in vitro cytotoxicity of CTAB-MSNs were analyzed. Our results reveal that CTAB-MSNs display a uniform pore structure, extensive surface area, and high drug-loading capacity, of approximately 37.2% by weight. The viability assessments showed that CTAB-MSNs exhibited superior human hepatoma (HepG2) cell killing compared to free CTAB. Therefore, CTAB-MSNs may have advantages over conventional cancer therapies.
On quantifying the topological charge in micromagnetics using a lattice-based approach
Authors: Kim Joo-Von , Mulkers Jeroen
Published: August 2020

An implementation of a lattice-based approach for computing the topological skyrmion charge is provided for the open source micromagnetics code mumax3. Its accuracy with respect to an existing method based on finite difference derivatives is compared for three different test cases. The lattice-based approach is found to be more robust for finite-temperature dynamics and for nucleation and annihilation processes in extended systems.
Incorporating Exposure Measurement Data from Similar Exposure Scenarios to Inform Exposure Modeling Estimates: A Demonstration Using Cluster Analysis and Bayesian Modeling
Authors: Huang Shao-Zu , Chuang Yu-Chuan , Hung Po-Chen , Chen Chih-Yong , Chiang Su-Yin , Wu Kuen-Yuh
Published: August 2020

Addressing occupational health and safety concerns early in the design stage anticipates hazards and enables health professionals to recommend control measures that can best protect workers’ health. This method is a well-established tool in public health. Importantly, its success depends on a comprehensive exposure assessment that incorporates previous exposure data and outcomes. Traditional methods for characterizing similar occupational exposure scenarios rely on expert judgment or qualitative descriptions of relevant exposure data, which often include undisclosed underlying assumptions about specific exposure conditions. Thus, improved methods for predicting exposure modeling estimates based on available data are needed. This study proposes that cluster analysis can be used to quantify the relevance of existing exposure scenarios that are similar to a new scenario. We demonstrate how this method improves exposure predictions. Exposure data and contextual information of the scenarios were collected from past exposure assessment reports. Prior distributions for the exposure distribution parameters were specified using Stoffenmanager® 8 predictions. Gower distance and k-Medoids clustering algorithm analyses grouped existing scenarios into clusters based on similarity. The information was used in a Bayesian model to specify the degree of correlation between similar scenarios and the scenarios to be assessed. Using the distance metric to characterize the degree of similarity, the performance of the Bayesian model was improved in terms of the average bias of model estimates and measured data, reducing from 0.77 (SD: 2.0) to 0.49 (SD: 1.8). Nevertheless, underestimation of exposures still occurred for some rare scenarios, which tended to be those with highly variable exposure data. In conclusion, the cluster analysis approach may enable transparent selection of similar exposure scenarios for factoring into design-phase assessments and thereby improve exposure modeling estimates.
Exploring functionally annotated transcriptional consensus regulatory elements with CONREL
Authors: Dalfovo Davide , Valentini Samuel , Romanel Alessandro
Published: August 2020

Understanding the interaction between human genome regulatory elements and transcription factors is fundamental to elucidate the structure of gene regulatory networks. Here we present CONREL, a web application that allows for the exploration of functionally annotated transcriptional ‘consensus’ regulatory elements at different levels of abstraction. CONREL provides an extensive collection of consensus promoters, enhancers and active enhancers for 198 cell-lines across 38 tissue types, which are also combined to provide global consensuses. In addition, 1000 Genomes Project genotype data and the ‘total binding affinity’ of thousands of transcription factor binding motifs at genomic regulatory elements is fully combined and exploited to characterize and annotate functional properties of our collection. Comparison with other available resources highlights the strengths and advantages of CONREL. CONREL can be used to explore genomic loci, specific genes or genomic regions of interest across different cell lines and tissue types. The resource is freely available at https://bcglab.cibio.unitn.it/conrel.
Genomic Evidence for Sensorial Adaptations to a Nocturnal Predatory Lifestyle in Owls
Authors: Espíndola-Hernández Pamela , Mueller Jakob C , Carrete Martina , Boerno Stefan , Kempenaers Bart
Published: August 2020

Owls (Strigiformes) evolved specific adaptations to their nocturnal predatory lifestyle, such as asymmetrical ears, a facial disk, and a feather structure allowing silent flight. Owls also share some traits with diurnal raptors and other nocturnal birds, such as cryptic plumage patterns, reversed sexual size dimorphism, and acute vision and hearing. The genetic basis of some of these adaptations to a nocturnal predatory lifestyle has been studied by candidate gene approaches but rarely with genome-wide scans. Here, we used a genome-wide comparative analysis to test for selection in the early history of the owls. We estimated the substitution rates in the coding regions of 20 bird genomes, including 11 owls of which five were newly sequenced. Then, we tested for functional overrepresentation across the genes that showed signals of selection. In the ancestral branch of the owls, we found traces of positive selection in the evolution of genes functionally related to visual perception, especially to phototransduction, and to chromosome packaging. Several genes that have been previously linked to acoustic perception, circadian rhythm, and feather structure also showed signals of an accelerated evolution in the origin of the owls. We discuss the functions of the genes under positive selection and their putative association with the adaptation to the nocturnal predatory lifestyle of the owls.
Defining Resilience in Older People: Does a Subjective Definition of Stressor Work?
Authors: Pedone Claudio , Costanzo Luisa , Finamore Panaiotis , Bandinelli Stefania , Ferrucci Luigi , Antonelli Incalzi Raffaele
Published: August 2020

Background

The operational definition of resilience is elusive and resilient people are difficult to identify. We used self-reported “major health event” (srMHE) to identify resilience and evaluate the functional and mortality trajectories associated with this condition.

Method

We selected from the InCHIANTI study persons aged 65 or older who could perform the Short Physical Performance Battery at baseline and attended the 3 years follow-up visit. We identified 4 groups: Controls: no srMHE and no decline in physical function; Decliners: no srMHE and decline in physical function; Resilient: srMHE and no decline in physical function; and Non-resilient: srMHE and decline in physical function. Linear mixed models and Cox regression were used to analyze changes in activities of daily living (ADL) score over 9- and 10-year mortality across groups, respectively.

Results

The 313 participants that reported a srMHE had worse perceived health status and higher number of GP visits and prescribed drugs at baseline. Of these, 78 were Resilient and 235 Non-resilient; of the remaining, 136 were Controls and 277 Decliners. Compared to the Controls, Resilient had similar change of ADL score over time (β: −.03, p = .92) and mortality (hazard ratio: 1.31, 95% confidence interval: 0.76–2.23), while Decliners and Non-resilient showed significantly higher mortality and, the latter, worsening of ADL score. Additional srMHE during follow-up affected the rate of change of ADL score and mortality more in the Controls group than in the Resilient group.

Conclusions

A srMHE along with repeated evaluation of physical function may be used to identify resilience in older people, and may complement the standard functional evaluation of geriatric patients.
Age Moderates Perceived COVID-19 Disruption on Well-Being
Authors: Knepple Carney Amy , Graf Allyson S , Hudson Grace , Wilson Ellen
Published: August 2020

Background and Objectives

It is not fully understood how large-scale events affect well-being. Older adults showed the highest levels of resilience following the September 11th (9/11) terrorist attacks, but during the severe acute respiratory syndrome outbreak, there were no age-related differences in well-being. The current study examined the Coronavirus Disease 2019 (COVID-19) disruption on well-being throughout adulthood.

Research Design and Methods

Perceived stress and affect were examined in 166 community-dwelling adults (Mage = 35.65; SD = 15.53; range = 18–79) in relation to the perceived disruption of the COVID-19 pandemic to their lives.

Results

A significant moderation was found for age and COVID-19 disruption on perceived stress [F(5, 153) = 8.88, p < .05, R2 = .22] and negative affect [F(5, 154) = 4.91, p < .05, R2 = .14], but not for positive affect. For participants over 50, those who rated COVID-19 as a low or high disruption had similar scores on stress and negative affect, but with younger aged participants, perceiving high disruption corresponded with higher levels of stress and negative affect.

Discussion and Implications

Findings are consistent with the strength and vulnerability integration (SAVI) model, wherein older adults try to maintain positive emotional well-being, with middle-aged and older adults in the current study having experienced less negative impact on well-being. Middle-aged and older adults may be better able to regulate negative emotions from COVID-19 than younger adults. SAVI proposes a greater negative impact on older adults when they experience sustained stressors; as the challenges with COVID-19 continue, further data will need to be examined.