bluuebunny/crossref_metadata_2025 huggingface dataset:
Education Development Based On Practicum To Develop Reflective Thinking Students Of Biology Teachers
Authors: Citraningrum M , Sudargo F
Published: August 2019

This study aims to produce a practicum model in a virtual laboratory that can provide reflective thinking skills for prospective biology teacher students on the topic of invertebrate zoology. a qualitative approach was used in this study with a case study method. The research found that the development of V-Lab invertebrate zoology programs is very helpful for prospective teachers to understand real invertebrates and improve reflective thinking skills of prospective biology teacher students, where they can relate their knowledge to everyday life. Invertebrates are a branch of biology that must be mastered by prospective teacher students, with the existence of this v-lab program makes it easy for students to understand the material and reflect it in life. Based on the results of the analysis it can be concluded that the virtual practicum on the concept of invertebrate zoology has a significant effect on improving the reflective ability of prospective teacher students.
A Chaotic Jerk System with Three Cubic Nonlinearities, Dynamical Analysis, Adaptive Chaos Synchronization and Circuit Simulation
Authors: Vaidyanathan S , Sambas A , Zhang S , Mujiarto  , Mamat M , Subiyanto
Published: August 2019

A 3-D new chaotic jerk system with three cubic nonlinearities is proposed in this paper. The dynamical properties of the new jerk system are described in terms of phase portraits, Lyapunov exponents, Kaplan-Yorke dimension, symmetry, dissipativity, etc. Also, a detailed dynamical analysis of the jerk system has been carried out with bifurcation diagram and Lyapunov exponents. As an engineering application, adaptive synchronization of the new chaotic jerk system with itself is designed via backstepping control method. Furthermore, an electronic circuit realization of the new chaotic jerk system is presented in detail to confirm the feasibility of the theoretical chaotic jerk model.
A New 4-D Chaotic System with Self-Excited Two-Wing Attractor, its Dynamical Analysis and Circuit Realization
Authors: Sambas A , Vaidyanathan S , Zhang S , Mujiarto  , Mamat M , Subiyanto  , Sanjaya W. S. Mada
Published: August 2019

A new four-dimensional chaotic system with only two quadratic nonlinearities is proposed in this paper. It is interesting that the new chaotic system exhibits a two-wing strange attractor. The dynamical properties of the new chaotic system are described in terms of phase portraits, equilibrium points, Lyapunov exponents, Kaplan-Yorke dimension, dissipativity, etc. The new chaotic system has two saddle-foci, unstable equilibrium points. Thus, the new chaotic system exhibits self-excited attractor. Also, a detailed analysis of the new chaotic system dynamics has been carried out with bifurcation diagram and Lyapunov exponents. As an engineering application, an electronic circuit realization of the new chaotic system is designed via MultiSIM to confirm the feasibility of the theoretical 4-D chaotic model.
Mobile Customer Relationship Management (m-CRM) Application Development in MSMEs Indonesia
Authors: Rosalina Vidila , Hamdan  , Saefudin
Published: August 2019

Micro, Small and Medium Enterprises (MSMEs) in Indonesia still utilize e-commerce which only focuses on sales, not yet equipped with good relations management with their customers after the transaction. The information technology system used to retain customers with the aim of increasing customer loyalty is called Customer Relationship Management (CRM) System. The current CRM application is more developed for large companies so that when applied to MSMEs it causes many gaps and is not adaptive. This study tries to develop a CRM application based on Android or called Mobile-CRM (m-CRM) that is adjusted to the needs of MSME businesses in Indonesia using a local approach and based on the characteristics of MSMEs in Indonesia. Modeling the system in the MSME CRM is described by the Use Case Diagram. The development of this application uses one model of system Rapid Application Development(RAD), namely Phased Development. The results of this MSME m-CRM application are generally equipped with product management features, transactions, managing customer relationships, and seeing delivery tracking. These features are expected to be able to help MSMEs in Indonesia increase customer loyalty and build global marketing in order to support the independence of the national economy.
Spatial Solution for Lower Class Vertical Housing. Case Study ‘Rusunawa’ Tambora, Jakarta, Indonesia
Authors: Florencia M , Trisno R , Priyomarsono Naniek Widayati , Lianto F , Marizar E S
Published: August 2019

The construction of lower class vertical housing is a solution provided by Jakarta government to solve the problem of slums and densely populated settlements. Residents were relocated to the apartment unit that was built with the aim of providing a comfortable residence, but many residents who complained about the flats could not accommodate their activities. In residential design, the activities and needs of residents must be accommodated in the dwelling so that it can function optimally. This research is aimed at finding spatial arrangements that are suitable for the needs of residents in simple rental apartments. This research was conducted in ‘Rusunawa’ Tambora, which was completed in 2015, by examining one unit of each tower within three towers. Research uses qualitative methods with data collection through observation, and is written descriptively to describe more detailed results. The results showed that the spatial system and existing layout were still not suitable, especially in terms of space hierarchy, and in terms of space facilities, so it needed adjustments to make spatial arrangements that could facilitate the needs of residents.
Playground Facilities for Lower Class Vertical Housing Case Study: ‘Rusunawa’ Menteng Asri Bogor, West Java
Authors: William  , Trisno R , Gunanata S , Priyomarsono Naniek Widayati , Susetyarto B M , Lianto F
Published: August 2019

An increasing population causes the problem of limited land for urban dwellings. This problem encourages the government to start building lower class vertical housing as a solution to providing shelter for low middle-income people. One of the most important things that need to be considered in the design of vertical housing is the problem of availability of playground facilities. Playground facilities are often overlooked, even though it was regulated in the Indonesian Government Regulations (No). 4 act 27 of 1988 on vertical housing. This study focuses on whether the playground facilities provided in ‘Rusunawa’ Menteng Asri has aligned with SNI (Indonesian National Standard) guidelines and public playground safety handbook. The study employs an analysis method in which includes location assessment, selecting equipment, surfacing material, and equipment material. The study also conducts interviews on children and parents of ‘Rusunawa’ Menteng Asri. Even though the Rusunawa’ Menteng Asri already has playground facilities, the study found that it has not fully met the requirements.
Multimedia Based on Virtual Reality in Indonesian for Foreign Speakers Learning
Authors: Nurhadi J , Rahma R , Fadlilah A
Published: August 2019

Virtual Reality technology can manifest 3D virtual environments that are computer-simulated, and allows for the emergence of various interactions in 360° space. Virtual Reality is a technology that allows users to interact with an environment simulated by a computer. This study aims to create multimedia in the form of videos and photos based on Virtual Reality in the context of learning Indonesian for Foreign Speakers (BIPA). This research is based on Research and Development (R & D). The steps taken in this research process were: (1) research and data collection, (2) planning, (3) product development, (4) initial field trials, (5) revision of trial results, (6) product improvement and (7) final field implementation test. Based on the validation of experts, both Indonesian linguists and media experts, this Virtual Reality multimedia is feasible to be used as BIPA learning media. In addition, based on limited test results, this Virtual Reality multimedia fulfills three variables, namely: functionality, efficiency, and usability.
Health Education of Visual Inspection of Acetic Acid using Audiovisual Toward Motivation of Childbearing Age Women To Do the Test : A Case Study in Jemawan Klaten
Authors: Hamranani S S T , Permatasari Devi , Indriani
Published: August 2019

The cervical cancer remains one of the gravest threats to women’s lives in the world . This cancer prevention effort can be improved by providing health education about early detection of cervical cancer using the Visual inspection of acetic acid (IVA) method. Health education media that is easily accepted to increase womens’s motivation were by audiovisual. The purpose of the study was to determine the effect of providing health education with audiovisuals on the motivation of women of childbearing age to conduct IVA test.Research was conducted in Quasi Experiment with non-equivalent control group design. The sampling technique uses purposive sampling method with a total sample of 38 respondents divided into 19 respondents in the intervention group and 19 respondents in the control group. This study uses the Wilcoxon statistical test.The results of the pre-test and post-test on the provision of health education for the intervention group experienced an increase in motivation (strong) from 5.3% to 57.9%. The results of pre-test and post-test in the control group experienced a decrease in motivation (moderate) from 68.4% to 63.2%. The results obtained p-value of 0.001for α = 0.05. It was concluded that there was an effect of providing health education with audiovisuals on the motivation of women of childbearing age to carry out IVA test in Jemawan, Klaten
Low Back Muscle Electrical Activity in Pregnant Women of the Second and Third Trimesters
Authors: Purnamasari K D , Widyawati M N , Suryono S
Published: August 2019

Low back pain during pregnancy causes axial or parasagittal discomfort. These problems are experienced by more than two-thirds of pregnancies. Clinically the measurement of pain was carried out using the Visual Analogue Scale (VAS) method. Unfortunately, the method has low accuracy and is subjective. This paper proposes a method of measuring pain by using electromyography tools so that pain level measurement has a high level of accuracy and is non-invasive to patients. The study was carried out by installing electromyography electrodes on L4 and L5 muscles. The signal is recorded on a digital storage oscilloscope to find out the electrical activity. The results of the recording were evaluated for the action potential and frequency values.This study was conducted on 15 respondents with lower back muscle pain in mothers monitored for 1 minute with electromyography. The monitoring results are calculated on average frequency and action potential and then presented in the form of trends. The results of the analysis of pain level measurement were compared with the results of VAS measurements. From the results of this study indicate that the trend of the action potential and signal frequency using electromyography shows different results when respondents experience the same pain scale on VAS. The value generated in the measurement using VAS is only a pain number scale that is felt by the respondent where the value is subjective.
Weed vegetation analysis in Universitas Perjuangan of Tasikmalaya
Authors: Firmansyah Efrin , Pusparani Syafina
Published: August 2019

Weed is the plants which have some negative effect to the cultivated plant. They are undesirable plants that must be control by farmer or everyone who want to keep their area from weed. There are several methods to control them, it means preventive method, responsive method, and makes the weeds as beneficial plants. The aim of this research was to study the weed vegetation in the area of Universitas Perjuangan of Tasimalaya. The summed Dominance Ration (SDR) value was measured to know the each species dominance from 20 sample plots. The result showed there are seven species identified from Asteraceae, and a species from Fabaceae family. Sphagneticola trilobata and Tridax procumbens were major species those growth with the SDR values at 0.529, and 0.151 respectively.
The Effectiveness of “X” Kefir Brand Towards Glucose Level on Post Prandial Pre-Diabetes Male Mice (Mus Musculus) Swiss Webster Strains Orally
Authors: Kusmiati Meti , Nurpalah Rianti , Mardiana Ummy , Meri  , Nugraha Ramdhan Wisnu
Published: August 2019

Pre-diabetes prevalence to diabetes is increasing every year. This pre-diabetes is based on pancreatic β cell disorder and insulin resistance causing abnormalities of body metabolism. However, in pre-diabetes this disorder has not been seen as real. The use of fermented milk in the world of health is very useful because in the milk there are many beneficial microorganisms for the body so it is expected to be an alternative ingredient in prevention earlier in pre-diabetes so as to reduce the adverse effects that occur. Research has been conducted with the aim to find out the effect of fermented milk that is kefir on post prandial blood glucose level on male mice (Mus musculus) Swiss webmaster of pre-diabetes orally. Male mice were made pre-diabetes by giving alloxan 100 mg / kg BW. The samples were 25 mice divided into 5 groups with each of 5 mice, 2 control group were negative and positive control, they left sick and given glibenclamide as much as 0,013 mg / 20 gr BB, treatment group was given various dose of kefir with various variations of 0.32 mg / 20 gr BB, 0.65 mg / 20 gr BB and 1.3 mg / 20 gr BB. The results showed a significant difference (p <0.05) on fasting glucose examination and 2 hours post prandial after administration of kefir with various doses and showed an effect of kefir for blood glucose in mice (Mus musculus) is dosis 1 of 78.28 mg/dl.
Early Detection of Preeclampsia using a Rule-Based System Information System
Authors: Aini F N , Widyawati M N , Suryono S
Published: August 2019

Preeclampsia is the highest cause of maternal death. One program to reduce Maternal Mortality Rate (MMR) is by early detection. The incomplete history of maternal history that has occurred has led to the determination of an incorrect diagnosis and has resulted in errors in decision making. The results of the survey in the detection of preeclampsia include midwives not conducting a history of past medical history, physical examination during the first antenatal care visit is incomplete. During this time the detection and diagnosis model is still done manually, so it was not effective and efficient. The inspection data obtained using the information system becomes more complete and faster. Data obtained with information systems can be seen anywhere and anytime. This study produced innovations for the detection of preeclampsia in pregnant women using a rule-based system information system. This study uses the Quasy experimental posttest-only design. The subjects of this study were 66 pregnant women. Data collection was carried out using questionnaires and checklists. The results showed that early detection of preeclampsia using a rule-based system information system could improve the completeness of data on pregnant women up to 35.66%, and speed up the detection time of preeclampsia up to 35.60%. This system also has an effectivenessvalue 84.8%.
Investigation Internet of Things (IoT) Device using Integrated Digital Forensics Investigation Framework (IDFIF)
Authors: Rizal Randi , Hikmatyar Missi
Published: August 2019

The Internet of Things (IoT) in the Industrial Revolution 4.0 refers to networks of objects, objects, or devices that are connected on a large scale connected to the Internet. These objects, become smart, feel the environment and collect and exchange data with other objects. Devices on the internet of things are interconnected with other devices for the purpose of securely exchanging data. This new technology appears in various fields of human life. Therefore there are many new challenges for forensic investigators in finding digital evidence on these IoT devices. A digital forensic researcher will face many challenges to gather evidence from infected components on an Internet of Things (IoT) device and also face difficulties in analyzing the evidence. In this study, there will be an investigation of network forensic attacks on the Internet of Things (IoT) devices using the IDFIF method.
Effect of Health Education using Audiovisual on Knowledge of Osteoporosis Prevention in Elderly
Authors: Daryani i , Suciana Fitri , Rusmingsih Esri
Published: August 2019

Osteoporosis is a disease characterized by reduced bone density resulting in brittle and easily broken bones.. Prevention of osteoporosis through health education is important to prevent the risk of complications in the elderly. The use of audio visual methods in health education facilitates the delivery and receipt of health information. This study aims to determine the effect of health education using audio visual on the knowledge of prevention of osteoporosis in the elderly. In this research, pre-experimental design one group pre-post test design” methods were used. The number of samples was 14 respondents using purposive sampling. Data analysis using Wilcoxon test. The results of this study obtained knowledge about the prevention of osteoporosis in the pre-test, namely the sufficient category of 9 respondents (64.3%) and less 5 respondents (35.7%). Knowledge of osteoporosis prevention in the post-test is a good category of 11 respondents (78.6%), and enough as many as 3 respondents (21.4%). Wilcoxon test results obtained p value 0,000 (α = 0,05). The conclusion of this study is that there is an effect of health education using audio visual on the knowledge of prevention of osteoporosis in the elderly at the Posyandu for the elderly.
Drug Supplies Planning in Hospital for Epidemic Attack using SEIR Model
Authors: Syahrir Irwan , Suparno  , Vanany Iwan
Published: August 2019

Denguehaemorrhagic fever is one of the epidemic diseases that often occurs in Indonesia. The incidence of dengue outbreaks in Indonesia territory shows an increasing trend from year to year. People infected dengue virus, if not treated immediately can cause death and can quickly spread on a wider scale. The hospital as one of the health care facilities must be able to handle patients who are indicated and infected with dengue quickly and precisely. One important resource is the fulfilment of drug supplies for the treatment of DHF patients. Lack of drugs during a dengue epidemic should not occur because it will seriously endanger patient safety. To avoid shortages of drugs, hospital management is required to be able to manage and determine the enough amount of drug supplies in the hospital. This study aims to predict the amount of drug supplies in hospitals during the outbreak of dengue fever. SEIR model is used to predict the number of drug needs that must be provided by the hospital in the event of an dengue fever outbreak.
Effect of Ethanol Extract Sonchus arvensis Linn Leaves on Acute Toxicity in Healthy Male Albino rat (Rattus norvegicus)
Authors: Harun N , Fitria V , Karningsih D
Published: August 2019

Sonchus leaves are traditional plants whose effects have been widely studied including immunostimulants and diuretics. Both of these effects have benefits for maintaining health and treating diseases. The purpose of this study was to determine the acute toxic effects on healthy male albino rat after being extracted 1 time a day for 14 days. Each group of test animals was given a dose of of 700, 1400, 2800, 5600 (mg/KgBW) every 10 healthy male albino rat (n=40) for acute toxicity test and toxicity tests were observed for 14 days. The albino rat in all groups were observed for behaviour, body weight development. The data obtained were statistically tested with Shapiro Wilk normality test, or Friedman followed by Wilcoxon test and calculated LD50. No deaths occurred in each dose group given ethanol extract Sonchus. Based on the average body weight in the dose group compared to the 0th, 7th, and 14th days has decreased. Statistics show that there were significant differences (p<0.05) between observations day 0-7, day 0-14, day 7-14 and also comparison between all groups. Ethanol extract sonchus did not provide toxic effects on healthy male albino rat tetapi memberikan penurunan berat badan pad tikus.
Antimicrobial Activity Test of Mangosteen Leaves Ethanol Extract (Garcinia mangostana Linn) Against Pseudomonas aeruginosa Bacteria
Authors: Suhartati R , Apriyani F , Khusnul  , Virgianti D P , Fathurohman M
Published: August 2019

Pseudomonas aeruginosa causes various infections such as skin infections. Mangosteen leaves contains active compounds that are useful in inhibiting bacterial growth. The purpose of this research is to examine the antibacterial activity of mangosteen leaves ethanol extract (Garcinia mangostana Linn) on the growth of Ps. aeruginosa bacteria. The experiment was conducted by an experimental method of Ps. aeruginosa bacteria using the Kirby-Bauer method. The concentration of ethanol extract from mangosteen leaves studied is 10% to 100% concentration with a bacterial density of 0.5 Mc Farland. The results showed that the ethanol extract of mangosteen leaves could inhibit bacteria from a concentration of 10% with an average inhibitory diameter is 13.20 mm, 20% is 14.00 mm, 30% is 14.65 mm, 40% is 15.85 mm, 50% is 16.05 mm, 60% is 16.90 mm, 70% is 17.55 mm, 80% is 18.75 mm, 90% is 19.25 mm and 100% equal to 24.80 mm. Based on the results of research and analysis date that has been carried out, it can be concluded that the ethanol extract of mangosteen leaves (Garcinia mangostana Linn) has antibacterial activity against Ps. aeruginosa, with a minimum inhibitory concentration of 10% with diameter inhibitor zone is 13.20 mm.
Isolation and Determination Antibacterial Citrinin From Various Fungal Monascus Purpureus using Rice as a Fermentation Substrate
Authors: Yuliana A , Rahmiyani I , Amin S , Fathurohman M , Meri
Published: August 2019

The red yeast rice was the product of fermented rice by Monascus purpureus. Metabolic processes during fermentation produce contents of secondary metabolites, such as pigment, monacolin K and citrinin. Citrinin has antimicrobial activities but its have nephrotoxic and hepatotoxic mycotoxin effects. The isolation and determination of citrinin by solid fermentation Monascus purpureus from various isolates have been done using rice as a substrate. The red yeast rice product was extracted using methanol. Citrinin levels of several red yeast rice products were measured using High-Performance Liquid Chromatography at 330nm and 500nm with acetonitrile: phosphoric acid 0.2% (1:1), using a C18 column with a flow rate of 1ml/min. The curve of Citrinin standard linearity was created with some concentrations and produced the linear equation which was y = 71048x + 47811 with a value of r = 0.9998. The citrinin levels from several different red yeast rice products were red yeast rice of A 369.97 ng/ml, B 0.85 ng/ml, C 70.48 ng/ml, D 3.59 ng/ml and of E 790.17 ng/ml. The research showed that the different isolates of Monascus purpureus could influence the production of citrinin levels whereas the isolates of Monascus purpureus E has the highest citrinin levels. This citrinin level was considered safe to use because have not effected for nephrotoxic and hepatotoxic.
Identification of Anopheles sp. at Cibenda Urban Village Parigi Sub-District Pangandaran District
Authors: Nurmalasari A , Ruhimat U , Setiawan D , Pradani F Y , Farihatun A , Susilowati N D , Sunaryo R A , Tussolihah H
Published: August 2019

Malaria is an endemic parasitic disease that attacks countries with dense populations, which can reappear according to changes in natural phenomena, for example following environmental changes related to the growth of Anopheles sp. Anopheles sp. mosquitoes act as malaria vectors in the Southeast Asia region. Identification of Anopheles sp. species. is an important step to recognize the characteristics of various types of Anopheles sp. mosquito. Cibenda Village is located in the lowlands and borders the coast to be the mouth of the river and the waters of the Indonesian Ocean which allows the Anopheles sp. breeding. This study aims to determine the presence of Anopheles sp. in Cibenda Urban Village Parigi Sub District Pangandaran District as a risk factor for malaria transmission. This research is a descriptive research. The data obtained is presented in the form of tables and narratives. The examination method used is a microscopic methode. The conclusions of this study are founded of Anopheles sundaicus, Anopheles barbirostris, Anopheles subpictus, Anopheles vagus in in Cibenda Urban Village Parigi Sub District Pangandaran District which have potential as risk factors for malaria transmission.
Fault Diagnosis of On-load Tap-changer Based on Vibration Signal
Authors: Huang Wenquan , Peng Changqing , Jin Liang , Liu Jiacheng , Cai Yuqi
Published: August 2019

On-load tap-changer (OLTC) is an important part of large-scale load transformers, and its fault will directly affect the reactive power flow regulation of the power system and the stability of the load center voltage. In this paper, a fault state diagnosis method based on vibration signal is proposed for fault diagnosis of tap changer. The vibration signals are decomposed by wavelet packet transform and calculated energy entropy to obtain the state information of the tap changer. The experimental data shows that the state characteristics are obvious under different faults, which lays a foundation for in-depth study of fault diagnosis.
Diagnosis platform development of partial discharge data based on CMMI model
Authors: Li Songyuan , Liu Chuanghua , Xi Xiaoguang , Zhao Cong , Tian Yangpu , Liu Chengbao
Published: August 2019

Capability Maturity Model Integration (CMMI) model is an international standard in software development process and quality management. It integrates the idea of project management body of knowledge and total quality management. Through continuous process improvement for CMMI model, a flexible, regular and progressive capability model framework is established to increase the transparency and controllability of project management and improve the overall effectiveness of software development, which not only ensures software quality, but also solves the bottleneck of traditional project management applied in information technology (IT) industry. This paper presents the analysis and application of CMMI in partial discharge data diagnosis platform, which illustrates its outstanding capability of IT project management. CMMI model make the process manageable and measurable so that the main factors that lead to poor quality and low productivity can be controlled or eliminated.
The Simulation and Experimental Study of Hydraulic Transmission with Constant-pressure Scheme for Wave Energy Converter Application
Authors: Juwairiyah S , Ibrahim M Z , Albani A , Yusop Z M , Jusoh M A , Mohad S
Published: August 2019

This paper presents the simulation and experimental results of the hydraulic system for wave energy converter application. The different input force applied from the pump unit will imitates the force of wave energy converter (WEC) produced by the ocean waves motion. The simulation conducted using the Hydraulic FluidSIM® 5th version, while the experiment was conducted at Festo-Hydraulic Laboratory. In FluidSIM®, the role of wave floater represented by a set of pump unit that will provide desired pressure to the hydraulic piston. The pump unit consists of a motor, pump, tank and pressure relief valve. The input pressure at the pump unit was adjusted in twelve different levels in the range of 5 Bar to 60 Bar. The different pressure will create a different oil velocity that caused the extension and retraction of the piston. The different pressure also will create a different speed (measured in RPM) of a hydraulic motor. An accumulator and four units of check valves used to drive the moving oil in unidirectional at a smooth flow rate. As a result, the rise of input pressure at the pump unit will increase the speed of a hydraulic motor. For this reason, to achieve the optimal electrical generation by a generator that mounted with hydraulic motor, the higher input pressure is needed. Furthermore, the simulation is validated by the physical experiment to determine the accuracy of generating data. The averaged accuracy of simulation data compared to experimental is 89.92%. After all, the finding from this study will be utilised as a reference in the estimation of the optimal dimension for the actual scale of a hydraulic system for application in the WEC.
Reactive Power Control of a 3-phase Grid-Connected Building Integrated Photovoltaic System
Authors: Rasul M J M A , Kolhe Mohan
Published: August 2019

Recently, a tendency in the growing of grid-connected building integrated photovoltaic (BIPV) systems has been noticed in most countries. Hence, high penetration of PV power into the system network can be observed in many points in the network. This may cause severe problems in the distribution network originated by the intermittent behaviour of PV systems. As a feasible solution, the reactive power capability of voltage source inverter in PV systems can be employed rather than approaching expensive grid infrastructures in the distribution network. The purpose of this study is to implement a 3-phase grid-connected BIPV system with reactive power control to regulate the system voltage and improve the system power factor. Subsequent to this, the system model is designed and developed in MATLAB Simulink application. The inverter control system along with the reactive power control is developed for the proper system operation at different system conditions to reduce the var compensation on the utility grid. A better system accuracy of the developed system model is verified by validating with real system data.
The Influence of Mg/Cu on Tensile Properties of ZA27 Alloy
Authors: Zhang Hui , Zhu Yanqing , Li Ning , Huang Yao , Zhao Chengzhi , Zhang Hexin
Published: August 2019

In this paper, the addition of magnesium and copper was changed to investigate the effect of magnesium and copper on the tensile properties of ZA27(Zn-27Al) alloy. The experimental results showed that Zn-27Al-0.8Mg has the largest tensile strength of 294.61 MPa. The fracture of Zn-27Al-xMg alloy was mainly related to the newly precipitated magnesium phases (β+β´). For the Zn-27Al-xCu alloy, when the amount of copper added was 0.4wt.%, the tensile strength reached 292.58 MPa, and when the amount of copper added was 2.0wt.%, the elongation even reached 80%, indicating that the alloy has good plasticity. The fracture of the Zn-27Al-xCu alloy was mainly related to defects in the structure and the second phase particles.
Effects of heat treatment on microstrucutures of a Re-containing Ni-based single crystal superalloy
Authors: Zhang J , Gao L Q , Liu Y F , Zhao J X , Zhang X T
Published: August 2019

Effects of heat treatment on microstrucutures of a Re-containing single crystal superalloy have been investigated. The results showed that (γ+γ′) eutectic in as-cast alloy is practically dissolved with solution heat treatment, and the degree of segregation is distinctly decreased. The size, morphology and distribution of γ′ phase are mightily affected by the first-stage ageing treatment temperature. When the first-stage ageing treatment temperature lower than 1160°C, the shape of the γ′ phase is cubic. But the γ′ phase shape is transformed to sphericity when the temperature higher than 1180°C. The γ phase channel width is significantly increased, and the fine γ′ phase precipitated in the γ phase matrix channel.
Research status of on-line monitoring of laser metal deposition
Authors: Jiang Zhaojun , Wang Jun
Published: August 2019

The process of laser metal deposition was easy to be affected by fluctuations of environment and process parameters, leading to the deviation of melt pool temperature or deposition morphology and so on. Accumulation of small deviation would result in the instability of deposition process and lead to the failure of forming. Therefore, the on-line monitoring of laser metal deposition process was studied, involving thermal history of forming parts, temperature and size of melt pool, deposition morphology and forming defects, and so on. In this paper, the on-line monitoring technologies, such as thermocouple temperature measurement, infrared thermal imaging, high-speed camera and other monitoring methods, were introduced, and the open-loop monitoring, closed-loop feedback control and closed-loop feedforward control technologies were illustrated in detail. According to the research situation, the future development of on-line monitoring in laser metal deposition was prospected.
Optimizing your undergraduate teaching as you would an experiment: developing the next generation of cell biologists
Authors: Segarra Verónica A. , Styers Melanie L. , Dolan Erin L.
Published: August 2019

The American Society for Cell Biology (ASCB) is a community dedicated to helping prepare the next generation of scientists to advance our understanding of the cell to an unprecedented level of sophistication and detail. Its Education Committee fosters this process by creating educational and professional development opportunities around best practices in science pedagogy, while its Minorities Affairs Committee aims to strengthen the scientific workforce by broadening participation of and support for underrepresented minorities in cell biology. To act upon these complementary priorities, the ASCB has developed a Declaration on Effective and Inclusive Biology Education. Its purpose is to outline practical actions for stakeholders in undergraduate education at the levels of faculty, departments, institutions, professional organizations, and funding agencies. Its recommendations are rooted in evidence-based best practices to support the success of diverse and heterogeneous undergraduate demographics and are designed to be highly adaptable to the existing strengths and needs of individual practitioners, student populations, and institutions. We acknowledge the ever-evolving nature of best practices in undergraduate education and hope that the dissemination of this declaration will play a role in this iterative process.
Effects of Decalcifying Agents of Variable Duration on PD-L1 Immunohistochemistry
Authors: Strickland Amanda L , Blacketer Sara , Molberg Kyle , Markantonis John , Lucas Elena
Published: August 2019

Objectives

To evaluate the effects of decalcifying agents on programmed cell death ligand 1 (PD-L1) immunohistochemistry (IHC).

Methods

Fragments of 10 placentas (high PD-L1 expressor) and 10 lungs (lower PD-L1 expressor) were formalin-fixed and subjected to four decalcifying solutions (EDTA, formic acid/MasterCal IM Plus [FA/MC], 12% HCl, and Decal STAT/23% HCl) for 1, 2, 6, or 24 hours. H&E staining and PD-L1 using IHC 22C3 pharmDx were performed, and PD-L1 staining was assessed.

Results

Minimal to no change in staining intensity or proportion of stained cells was seen with EDTA or FA/MC at all decalcifying durations. Both HCl-based decalcifiers demonstrated a progressive decrease in percentage of positive cells and staining intensity with longer decalcifying duration, particularly with Decal STAT.

Conclusions

EDTA and FA/MC have little effect on PD-L1 expression. 12% HCl causes a progressive decline in staining. Decal STAT dramatically reduced staining with all treatment durations, especially at 24 hours.
The Evolving Field of Genetic Epidemiology: From Familial Aggregation to Genomic Sequencing
Authors: Duggal Priya , Ladd-Acosta Christine , Ray Debashree , Beaty Terri H
Published: August 2019

The field of genetic epidemiology is relatively young and brings together genetics, epidemiology, and biostatistics to identify and implement the best study designs and statistical analyses for identifying genes controlling risk for complex and heterogeneous diseases (i.e., those where genes and environmental risk factors both contribute to etiology). The field has moved quickly over the past 40 years partly because the technology of genotyping and sequencing has forced it to adapt while adhering to the fundamental principles of genetics. In the last two decades, the available tools for genetic epidemiology have expanded from a genetic focus (considering 1 gene at a time) to a genomic focus (considering the entire genome), and now they must further expand to integrate information from other “-omics” (e.g., epigenomics, transcriptomics as measured by RNA expression) at both the individual and the population levels. Additionally, we can now also evaluate gene and environment interactions across populations to better understand exposure and the heterogeneity in disease risk. The future challenges facing genetic epidemiology are considerable both in scale and techniques, but the importance of the field will not diminish because by design it ties scientific goals with public health applications.
Relations Between Acculturation and Cognitive Outcomes in a Sample of Latino Preschool Children
Authors: Crossland M , Lonigan C
Published: August 2019

Objective

Culture and ethnicity significantly affect cognitive test performance of adults and children. However, no prior studies have examined the effect of acculturation on the cognitive test performance of toddlers. This study examined the relationship between parental acculturation and cognitive test scores among Latino preschoolers.

Participants and Method

In this study, 1300 Latino toddlers (50% F; M age = 53.7 months, SD = 5.2) completed the Definitional Vocabulary subtest of the Test of Preschool Early Literacy (TOPEL), the Revised Get Ready to Read Screening Tool (GRTR) and, if they spoke Spanish, the Definitional Vocabulary subtest of the Spanish Early Literacy Assessment (SPELA) pre-intervention. Parents completed the Acculturation Scale for Mexican Americans (ARMAS) for a measure of acculturation.

Results

Exploratory SEM of the ARMAS revealed 4 factors: 2 language preference factors and 2 cultural identity factors. All factors were significantly related to cognitive outcomes (ps < .001) - except for the Latin Identity factor’s relation to the GRTR. English Language Preferences (ELP) and Anglo Identity (AI) factors showed positive associations to tests administered in English; as test scores increased along with ELP and AI. For SPELA, as test scores increased, ELP and AI decreased. For Spanish Language Preferences and Latin Identity factors, relations with test scores were the opposite of those for ELP and AI. Multiple regression analyses showed that both ARMAS language factors uniquely predicted SPELA scores (R2 = .17), and the ELP factor uniquely predicted TOPEL (R2 = .30) and GRTR (R2 = .16) scores. The ARMAS identity factors did not uniquely predict any test score.

Conclusions

Acculturation does impact performance on cognitive measures. Importantly, language preferences have a larger effect on cognitive outcomes than identity factors. Findings support the need to consider cultural variables when interpreting outcomes on cognitive tests in toddlers, particularly language preferences.
Predictors of Neurocognitive Impairment in Spanish-Speaking Latinos Living with HIV in the United States using Newly Developed Neuropsychological Test Norms
Authors: Hussain M A , Kamalyan L , Diaz M M , Umlauf A , Franklin D R , Cherner M , Rivera Mindt M , Artiola i Fortuny R , Heaton R K , Marquine M J
Published: August 2019

Objective

HIV-associated neurocognitive impairment (NCI) is prevalent and impactful. Yet, there is an absence of published studies that investigate its correlates among Spanish-speaking Latinos living in mainland US- a demographic that represents a large and vulnerable segment of the HIV+ population. The goal of the current study was to examine predictors of NCI among Spanish-speaking Latinos with HIV living in the United States.

Participants and Method

153 Spanish-speaking Latinos living with HIV from the US-Mexico border region (Age: M = 38.2, SD = 9.7; Education: M = 10.9, SD = 3.6; 73% female; 56% AIDS) completed comprehensive neuropsychological, neuromedical, and psychiatric evaluations in Spanish. Scores across 7 cognitive domains were converted to a Global Deficit Score (GDS) based on T-scores on individual tests using newly developed, region specific, and demographically-corrected norms for Spanish-speaking Latinos. NCI was determined using cutoff of GDS > 0.5 (39.2% of sample). Examined predictors included HIV disease characteristics (e.g., AIDS status, current CD4 count, duration of antiretroviral therapy (ART) exposure) and psychiatric comorbidities.

Results

A multivariable logistic regression - including predictors that were associated with NCI in univariable analyses - showed a significant interaction between lifetime history of substance use disorder (LT SUD) and duration of ART exposure, after accounting for AIDS status (LR Chi2 = 3.99, p = 0.046). Stratified analyses showed that among participants who did not have LT SUD, longer ART exposure was associated with decreased NCI (p = 0.01), while rates of NCI among those with LT SUD were not influenced by months of ART exposure (p = 0.91).

Conclusions

Present findings showed that HIV disease burden and psychiatric characteristics might interact to impact NCI among Spanish-speaking Latinos. Considering these influences may help in the provision of comprehensive care to Spanish-speaking, Latino minority groups that suffer from NCI and HIV.
The Roles of Health Literacy and Physician-Patient Relationship in Self-Reported Health Outcomes Within a Diverse Sample of Persons Living with HIV
Authors: Santana E , Gonzalez J , Byrd D , Rivera Mindt M
Published: August 2019

Objective

Barriers like poor health literacy and patient-provider communication add to health disparities in diverse populations. Perceived autonomy has been shown to improve patients’ health satisfaction and knowledge of their illness. However, no studies have examined these issues in HIV patients. This study examined the roles of health literacy and physician-patient relationship in health outcomes (e.g., mental health and emotional/physical functioning) in persons living with HIV (PLWH).

Participants and Method

This cross-sectional study included 91 PLWH (74% Latinx and 26% non-Latinx White; 68% Male) who completed the Test of Functional Health Literacy in Adults (TOFHLA), Physician–Patient Relationship Scale (PPRS), and Medical Outcomes Study-HIV Health Survey (MOS). The study variables included: TOFHLA total score, PPRS Part Decision- Making (PDM) and Trust subscales, and MOS Mental Health and Health Transition subscales.

Results

A linear regression showed that our model (ethnicity, TOFHLA, PPRS PDM and Trust) predicted MOS HT (R2 = .14, p < 0.05), such that Latinx ethnicity (β = .30) and better TOFHLA scores (β = -.22) predicted better MOS HT scores (ps < .05). Another regression showed that our model predicted MOS MH (R2 = 0.07, p = <.01), such that greater PPRS PDM scores predicted better MOS MH scores (β = .27, p = <.01).

Conclusions

Ethnicity and better health literacy were related to improved emotional/physical functioning over a 4-week period and greater shared decision-making was related to better overall mental health. These findings highlight the importance of identifying sociocultural factors and interpersonal processes of care to inform culturally-tailored interventions that can result in enhanced and effective treatment for PLWH patients and in improved physical and mental health outcomes.
Bridging Representation Gaps in Big Data: An Alzheimer's Disease Neuroimaging Initiative (ADNI) Investigation
Authors: Tureson K , Gold A I , Thames A D
Published: August 2019

Objective

Large-scale research consortium studies are increasingly used to help aid in early identification of age-related brain changes and neurodegenerative disease risk. Racial/ethnic minorities (REM) are severely underrepresented in publicly available datasets related to neurodegenerative disease. This is problematic given that the US older adult population will be comprised of 40% REM by 2050. As this population grows more diverse, it is crucial that Alzheimer’s disease (AD) risk factors are appropriately characterized and REM are represented in longitudinal research. The purpose of this study was to examine memory, Apolipoprotein E (APOE) status, and hippocampal volume (HV) data among REM participants in the Alzheimer’s Disease Neuroimaging Initiative (ADNI) cohort.

Participants and Method

We sampled 91 Latinx and Non-Hispanic Black (NHB) ADNI participants, which included 41 controls (CN; 39% Latinx) and 50 individuals with mild cognitive impairment (MCI; 52% Latinx). Measures included Logical Memory (LM) Delay, Rey Auditory Verbal Learning Test (RAVLT), Alzheimer’s Disease Assessment Cognitive 13-item Scale (ADAS13), APOE e4 and APOE e2 status, and HV. Groups did not differ by age, education, or memory performance. None of the Latinx sample were e2 carriers, whereas 32% of NHB were e2 carriers.

Results

For NHB and Latinx MCI groups, LM Delay scores positively predicted greater HV (NHB: R2 = .17, p = .04; Latinx: R2 = .16, p = .04). Better RAVLT performance predicted greater HV for the Latinx MCI group but not for the NHB MCI group (Latinx: R2 = .13, p = .06). For NHB CN, e4 status and ADAS13 were positively correlated (r = .59, p = .002) but negatively correlated for Latinx CN (r = -.58, p = .002). APOE e2 and RAVLT percent forgetting were negatively correlated for NHB MCI (r = -.49, p = .01).

Conclusions

There appears to be differential risk associated with heterozygous e4 status in Latinx and NHB. APOE e2 may have been protective in the context of e4 in NHB. The degree to which e2 is protective in Latinx is unknown. Results highlight the need for improved REM representation in large-scale studies to understand genetic risk and protective factors in REM.
Influence of Acculturation on Emotional Learning and Memory in Spanish and English Speakers
Authors: Zink D N , Kuwabara H , Reyes E , Gomez-Batista S , Reyes A , Alvarez E , Strauss G P , Allen D N
Published: August 2019

Objective

The Emotional Verbal Learning Test-Spanish (EVLT-S) is a novel list learning test similar in structure to traditional verbal memory tests but contains words from 4 discrete emotional categories. Influence of acculturation on emotional learning was examined on EVLT-S learning trials 1 to 5.

Participants and Method

Participants included 50 bilingual healthy individuals in the Spanish-dominant group (Age M = 20.3years; 72% female) and 27 in the English-dominant group (Age M = 23.4years, 51.9% female). They were administered a battery of tests including the EVLT, a non-emotional verbal list learning test (LLT), Vocabulary (VC), Digit Span (DS), and The Short Acculturation Scale for Hispanics (SASH) in their dominant language. To examine learning curves a mixed model ANOVA was conducted with test (EVLT-S/EVLT, LLT-S/LLT) and trial as within-subjects variables and group (Spanish, English) as a between-subjects variable.

Results

There were significant main effects (p < .005) for test, trial, and group. The Spanish-dominant group had the lowest overall performance on the EVLT-S (main effect for group). Post hoc comparisons of the Spanish-dominant group’s LLT-S and EVLT-S performance indicated significant differences at each trail (p < .01), with the EVLT-S scores being lower than the LLT-S scores. The ANOVA was repeated with VC, DS, and SASH included as covariates. When controlling for these variables, the main effect for group was no longer significant. A significant trial by acculturation interaction effect emerged (p<.05), with the English-dominant group generally performing better than the Spanish-dominant group.

Conclusions

Results suggest that Spanish and English language group differences were largely accounted for by word knowledge (VC), working memory (DS), and acculturation differences (SASH) between the groups. The role of these variables is discussed further in the context of acculturation.