bluuebunny/crossref_metadata_2025 huggingface dataset:
Enhancing the Solubility of Ketoconazole via Pharmaceutical Cocrystal
Authors: Indra Indra , Janah Fitri Miftahul , Aryani Ratih
Published: August 2019

This present research is to synthesized and characterized cocrystal of ketoconazole through cocrystallization process in order to improve solubility properties of ketoconazole. Ketoconazole cocrystal synthesized by the slurry method and characterized using diffractometry (Powder X-Ray Diffraction), Thermogram (Differential Scanning Calorimetry), Microscopy (Polarizing microscope), FTIR spectroscopy and solubility analysis were performed to evaluate the cocrystal. The PXRD diffractogram of cocrystal ketoconazole is different compared to pure component. New peaks characteristic of cocrystal appear at a 2θ value of 16.94° and 24.58° In addition, synthesized cocrystal have unique habit crystal, melting point and FTIR spectrum compared to single component. The ketoconazole cocrystal from slurry method showed an improved solubility by 50 times compared to ketoconazole. This study showed that cocrystallization between ketoconazole and ascorbic acid were successfully formed and enhanced the solubility of the drug.
Synthesis and Characterization of Fe(III) Complex with N’- (3-Nitrobenzoyl)Isonicotinohydrazide as an Anti-tuberculosis Candidate
Authors: Ruswanto R , Sarwatiningsih Y , Pratita ATK , Indra  , Dewi R
Published: August 2019

Recently, we have been conducted synthesis of complex compounds of Fe(III)N’-(3- nitrobenzoyl)isonicotinohydrazideusing refluxing N’-(3 -nitrobenzoyl)isonicotinohydrazideas ligands and FeCl3.6H2O as the metal at 75 °C for 6 hours in ethanol. The synthesis results obtained82.45% recovery, and from the purity test are shown with a narrow melting range is 220-222°C. Based on identification with UV-Visible spectrophotometer, infrared spectrometer and Atomic Absorption Spectrophotometer (AAS) indicate that the complex compound have λmax of 272.00 nm, giving vibration of Fe-O at 495.1 cm−1 and 599.6 cm−1 with formula complex compounds, namely [Fe(C13H10N4O4(H2O)4)Cl3].10 H2O.
Description of Blood Glucose Levels in Catarac Patients
Authors: Nurpalah Rianti , Kusmiati Meti , Mardiana Ummy , Arrizqiyani Tanendri , Jahrotul J Yusi
Published: August 2019

Vision is one of the factors that are very supportive in our daily lives; vision can be achieved well through the eye. It consists of various parts which are support each other if there is a disturbance in one part, the eye function will not work properly. One of the causes of eye disorders is the occurrence of turbidity in the part of the eye lens which is commonly called cataract. Cataracts can occur due to an increase in high blood glucose levels and the accumulation of one component of glucose (sorbitol) in the area of the lens. Research has been carried out on the description of blood glucose levels in cataract patients at the Cicendo Eye Hospital in Bandung on June 5 - June 8, 2017. The purpose of the research is to find out the blood glucose description in cataract patients. The method of the research is a descriptive. The examination performed by using fasting blood glucose parameters on 36 cataract patients as respondents. Based on the results of the research, 2.7% had low blood glucose levels, 47.3% had normal blood glucose, and 50% had high blood glucose levels.
Effect of Leaflet Administration on the Level Knowledge and Rationality of Dexamethasone use in “Sumber Sehat” Pharmacy, Banjar, West Java, Indonesia
Authors: Kurniasih N , Indriastuti M , Rahmah S , Wahlanto P , Lili D
Published: August 2019

Dexamethason is a hormone and corticosteroid-class drug produced by the adrenal gland and it function is to regulate carbohydrate metabolism, fat and protein, regulation of body fluids, the body’s defense system, and bone formation. The use of corticosteroid drugs must be considered properly because it can cause various side effects that are not good for the body. Dexamethasone is still widely used in the community without the right indication as an anti-inflammatory drug, rheumatoid arthritis, and anti allergic. This is due to a lack of knowledge about the side effects of corticosteroids. This study aimed to analyze the effect of education using leaflets on the level of knowledge and rationality of dexamethasone use by the one group pre-test/post-test study design with the Wilcoxon test. Respondents were taken with accidential sampling method. The number of respondents obtained was 47 respondents. Based on the results of this study can be concluded that education by leaflet administration can significantly increase knowledge and rationality of dexamethasone use in Sumber Sehat Pharmacy, Banjar.
Hypnotic Direct and Indirect Suggestions for Improving the Efficiency and Depth of Sleep: An EEG Activity Signal Processing in Various Sleep Stages
Authors: Sudaryat Yayat , Nurhadi Jatmika , Rahma Rosita , Mayasari
Published: August 2019

Brain activity can be detected through the electric signals it produces. One of the benefits of detecting electric signals in the brain is to measure a person’s sleep quality. Sleep quality can be influenced by stimuli received by the brain before going to bed. One form of stimulus that can be accepted is in the form of suggestions, both direct and indirect suggestions. In this study, the two conditions of the stimulus suggestion will be tested to describe the effect on the electrical signals of the human brain.Based on the results of the analysis it can be described that the stimulus can increase sleep efficiency. Giving influential suggestions to reduce sleep latency and increase the depth of sleep. The stronger the suggestion, the more sleep you will deepen. Suggestions can make sleep deeper and reduce sleep latency. The deeper the level of sleep and the less sleep latency show the better the efficiency of sleep. The better the efficiency of sleep shows the better the quality of sleep.
The Residue Levels of Enrofloxacin Antibiotics in Catfish (Clarias batrachus)
Authors: Mulyani Reni , Herry  , Rustandi Naji
Published: August 2019

Enrofloxacin (EXF) in fish comes from feed, water, and the environment. Through these three sources enrofloxacin will accumulate in the body of the fish. Enrofloxacin enters the metabolic process and enters the tissue so that fish meat containing enrofloxacin will be produced, and can threaten human health such as the occurrence of carcinogenic potential. Tests have been carried out to test the time of decay of enrofloxacin in catfish after various doses, namely group A (control), B (25 ppb) and C (50 ppb). The fish samples analyzed were catfish which were tested by Enrofloxacin using the ELISA (Linked Immunosorbent Assay) method. The results showed that the last residual content of enrofloxacin was added to feed every day during the treatment of concentration for group B (17.89 ppb) and group C (17.47 ppb). However, the time for all enrofloxacin residues in catfish to be the same as the control or normal conditions turned out to take 80 days with enrofloxacin residual concentrations for group B (2.12 ppb) and group C (5.13 ppb)
Record Results Analysis Electrocardiogram (ECG) at Pangandaran Health Center
Authors: Supriadi Dedi , Kurniawan Rudi , Esa Hilman Firman , Kusumawaty Jajuk , Farihatun Atun , Rosmiati
Published: August 2019

Heart disease has killed around 17.3 million people in the world and ranks first in the cause of death in Indonesia. Nurses as one of the health workers who are directly related to doctors and patients, will not be separated from the ECG. The nurse’s ability to interpret the ECG will speed up the response to patients who have heart abnormalities. The purpose of this study was to determine the description of nurses’ knowledge in interpreting the results of ECG recordings at Pangandaran Health Center. The method used is an experimental method, while the population in this study were all general nurses in Pangandaran Pangandaran Health Center as many as 50 people. Research Results: This study shows that the knowledge of nurses who have attended ECG training in interpreting ECG recordings is general nurses with good knowledge as many as 24 people (68.57%) and those who do not take EKG training that most general nurses with less knowledge 7 people (46.67%). The conclusion of this study is that nurses’ knowledge in interpreting ECG recordings was 27 as good (54%). Suggestions for Pangandaran Health Center to continue evaluating and developing nurses’ knowledge in interpreting ECG results.
Image Transmission with Joint Time Reversal and OFDM in Underwater Acoustic Environment
Authors: Widiarti Yuning , Wirawan  , Suwadi
Published: August 2019

The development of technology and applications in the underwater acoustic field are a challenge for researchers. The OFDM system is an interesting research topic to date because of its high-rate and high-quality wireless capabilities. In a multipath environment, OFDM can reduce the effect of multipath fading by converting frequency selective channel to a flat subchannels parallel collection of frequency. Time reversal with its spatial and temporal focal properties is a technique that can be relied upon in reducing channel fading and intersymbol interference which causes distortion in the received signal. In this paper, we present a study of transmitting images in underwater acoustic environments using a combined time reversal and OFDM (TR-OFDM) technique. The estimation technique based on the MMSE algorithm is used in the image restoration process. The simulation results show that transmitting image with the TR-OFDM system has superior performance compared to traditional OFDM system. With BPSK modulation and MMSE estimation technique, the BER obtained by TR-OFDM is 10−3 at SNR 8.2 dB. Modulation schemes such as M-PSK and M-QAM are also presented in this paper. BPSK modulation is proven to have the best performance on SNR 20 dB with zero resulting error.
A Design of Partograph Mobile with Android Based to Monitoring Childbirth Process
Authors: Wahyuni Sri , Nuryuniarti Rissa , Nurmahmudah Endah
Published: August 2019

Monitoring labor with Partograph make sure that the mother and her baby get childbirth care adequate, on time and than can help the midwife to prevent complications during childbirth. Using partograph during childbirth has not been fully carried out according to the procedure. In the reality midwives did not use partographs completely, correctly and on time. Situation and condition factors make it difficult for midwives to record partographs are part of the solution that must be found. The purpose this research in general is to develop A Desigen of Partograph Mobile with Android Based to Monitoring Childbirth Process A Desigen of Partograph Mobile with Android Based to Monitoring Childbirth Process. Research method used the system development life cycle (SDLC) which is consists of requirements and analysis, design, test, implementation / deploy and maintain. Result show an Android-based Partograf mobile application has been developed that can be used to assist midwives and facilitate monitoring of labor so that documentation is more effective and efficient
Study of Type 36 Housing Layout System, Case Study: Southscape Cluster Paradise Serpong City
Authors: Herlina  , Marizar Eddy S. , Fatimah Titin , Trisno Rudy , Priyomarsono Naniek Widayati
Published: August 2019

This research aims to determine the layout system on the type 36 house in the cluster of Southscape Paradise Serpong City whose family consists of four people so that the existing house can accommodate the needs and activities of residents optimally. This research uses descriptive qualitative research method. Research data consist of primary data and secondary data. Primary data is sourced from the informant, which is a family of four and lives in house type 36 Cyprus Cluster Southscape Paradise Serpong City. Primary data collection is done through documentation, written descriptions and in-depth interviews. Secondary data comes from books, journals and the internet. Secondary data collection is done by sorting and processing data related to interior design, especially regarding layout and furniture design system. The data that have been collected are then analyzed to produce the research findings. The findings of this study indicate that type 36 homes can meet the space requirements of a four-member family through optimization with a tight layout system with layout types unit with adjacent subsidiary unit, overlapping grid, cluster, single-loaded and double-loaded corridors.
Correlation of Uric Acid Levels and Rheumatoid Factor in the Elderly
Authors: Meri  , Yuliana A , Arrizqiyani T , Kusmiati M , Nurpalah R
Published: August 2019

Elderly people have dysfunctional changes in the immune system. Disease burden will increase due to uric acid particularly in elderly including arthritis. Rheumatoid factor (RF) is an examination that can identify the presence of rheumatoid arthritis. Reactive RF value in RA is 70%, while in people 65 years old is 20%. This research is to define the correlation between uric acid levels and rheumatoid factor in elderly. Methods use cross-sectional study; Participants: twenty-one elderly people. Measurements: whole blood and serum from elderly individuals, Accu Check, Antisera RF, Slide test. The research showed that normal uric acid levels with non-reactive RF were 15 people (93.8%) while with reactive RF was 1 person (6.3%). The results of uric acid levels increased with non-reactive RF were 2 people (40%) while with reactive RF was 3 people (60%). Uric acid levels and rheumatoid factor (RF) were analyzed using the Chi-square test. Both are interrelated (p=0,028, P< 0.05). The conclusion of this research is that uric acid levels are correlated with rheumatoid factor in the elderly.
Potential of Autotroph Microalgae (Spirulina plantentis) as Antimicrobial agent
Authors: Pratita ATK , Fathurohman M , Ruswanto R , Khusnul  , Suhartati R
Published: August 2019

Microalgae is a phytoplankton that has antimicrobial activity. From 20 blue-green microalgae species, 78% have antibacterial activity and 42% antifungal activity, but there are still many other microalgae species that have unknown their activities. One of the microalgae whose unknown antimicrobial potential is Spirulina plantentis. The purpose of this study was to determine the antimicrobial potential of autotrophic microalgae (Spirulina plantentis) which can be used as antimicrobial compounds from natural materials. This study used the agar diffusion method to see the antimicrobial activity of autotrophic microalgae. Microalgae suspension was tested their antimicrobial activities by using Staphylococcus aureus, Escherichia coli, and Candida albicans. The result shows that the MICs of Spirulina plantentis suspension against C. albicans, E. coli and S. aureus were 62.5 ppm, 125 ppm and 500 ppm. The MBCs against C. albicans, E. coli and S. aureus were 125 ppm, 250 ppm and 500 ppm. Antimicrobial activity of Spirulina plantentis suspension exhibited week against C. albicans and E. coli, but no antimicrobial activity against S. aureus. Spirulina plantentis produced inhibition zone against C. albicans by 3.9 mm at 125 ppm and 15.6 mm at 250 ppm, against S. aureus and E. coli by 1.4 mm at 500 ppm and 1.6 mm at 1000 ppm. Against E. coli by 8.55 mm at 500 ppm and 12 mm at 1000 ppm.
The Effect of the Ethanolic Extract of Asam Jawa Leaf (Tamarindus Indica L.) in Total Cholesterol, Triglyceride, LDL and HDL Concentration on Male Sprague Dawley Rats
Authors: Nofianti T , Nurmayasari S , Priatna M , Ruswanto R , Nurfatwa M
Published: August 2019

The objective of this study is to investigate the effect of ethanolic extract of Tamarindus indica L. in total cholesterol, LDL, triglyceride, and HDL level. The rats were grouped into 6 groups: namely normal control, negative, positive, and the test group that divided into doses I (1.748 mg / 200 g BW), dose II(3.497 mg / 200 grams BW) and dose III (6.994 mg / 200 grams BW). The rats come by switched from commercial food to an egg yolk and induced by propylthiouracil for 10 days (exception normal control group). The test compounds are administered one hour after induction for 10 days. The blood was taken in days of 11. The method to determine lipid fractions using Enzymatic Photometric Test. The results of this study showed that three doses of ethanolic extract of tamarind leaves can decrease the total cholesterol, LDL, and increase HDL levels. The percentage of cholesterol total decreasing were 16.70% (test dose I), 18.05% (test dose II), 19.18% (test dose III), LDL decreasing were 31.94% (test dose I), 61.05% (test dose II), 65.19% (test dose III ) and the percentage of HDL increasing were, 17.73% (test dose I) 79.10% (test dose II) 84.76% (test dose III). All the test dose showed significant (p<0.05) than the negative group. The obtained results revealed that ethanolic extract of Tamarindus indica exhibited significant effect (p<0.05) of lowering concentration of total cholesterol, LDL, triglyceride, and the increase of HDL concentration.
Processing of Inorganic Waste using Chemical Compounds (HCl and H2SO4) Method
Authors: Liswanti Y , Pujayanti H , Rahmayani T
Published: August 2019

The processing of infectious waste is still less effective in Indonesia. It is given to the third parties to be reprocessed by using incinerator. The result of this process can cause negative impacts on the environment in the form of gasses (CO2, SO2, and NO2). The waste processing by using the chemical compound (HCl and H2SO4) is an alternative method to minimize environmental pollution. The purpose of this research as an innovative and an effective method in processing inorganic waste in order to minimize the air pollution that released from the waste burning process and also to reduce the impact of it to the environmental pollution. This research is experimental by using chemical compounds. The sample was taken from the laboratory. Samples are students’ practicum remainders in the form of masks and gloves. The process includes several stages, they are mixing acid, soaking, neutralization, solidification, and stirred until the form a solid. The results of the research showed that this method was effective to minimize pollution.
The use of Concentration of Piper Betle Leaf Extracts in Commercial Feed to Parasites Intensity of Trichodina Sp. That Attacked Tilapia (Oreochromis Niloticus)
Authors: Agustina S S , Tasruddin  , Layoo N
Published: August 2019

Parasites Trichodina sp. is one type of fish disease that infects most tilapia. This parasite can penetrate the gill lamella and penetrate the blood vessels, causing bleeding. These injuries can cause the death of fish. This research aims to determine the effect of using Piper betle leaf extract concentration in the commercial feed on the intensity of parasites that attack tilapia (Oreochromis niloticus). The method used for data collection in this study is experimental, and laboratories with average weight are 15-20 gram of tilapia test organisms. The parameters observed included the intensity of the parasite Trichodina sp. and water quality. The results showed that the concentration of Piper betle leaf extract in treatment D (20% Piper betle leaf extract / 1 kg feed) gave the best treatment, where the intensity of Trichodina sp. which infected tilapia 16,17 ± 7,76. Data supporting measurement of water quality parameters including temperature, pH, DO, and ammonia in each treatment during the study are still within the proper limits for the life of tilapia.
Cross validation in sparse linear regression with piecewise continuous nonconvex penalties and its acceleration
Authors: Obuchi Tomoyuki , Sakata Ayaka
Published: August 2019

We investigate the signal reconstruction performance of sparse linear regression in the presence of noise when piecewise continuous nonconvex penalties are used. Among such penalties, we focus on the smoothly clipped absolute deviation (SCAD) penalty. The contributions of this study are three-fold: we first present a theoretical analysis of a typical reconstruction performance, using the replica method, under the assumption that each component of the design matrix is given as an independent and identically distributed (i.i.d.) Gaussian variable. This clarifies the superiority of the SCAD estimator compared within a wide parameter range, although the nonconvex nature of the penalty tends to lead to solution multiplicity in certain regions. This multiplicity is shown to be connected to replica symmetry breaking in the spin-glass theory, and associated phase diagrams are given. We also show that the global minimum of the mean square error between the estimator and the true signal is located in the replica symmetric phase. Second, we develop an approximate formula efficiently computing the cross-validation error without actually conducting the cross-validation, which is also applicable to the non-i.i.d. design matrices. It is shown that this formula is only applicable to the unique solution region and tends to be unstable in the multiple solution region. We implement instability detection procedures, which allows the approximate formula to stand alone and resultantly enables us to draw phase diagrams for any specific dataset. Third, we propose an annealing procedure, called nonconvexity annealing, to obtain the solution path efficiently. Numerical simulations are conducted on simulated datasets to examine these results to verify the consistency of the theoretical results and the efficiency of the approximate formula and nonconvexity annealing. The characteristic behaviour of the annealed solution in the multiple solution region is addressed. Another numerical experiment on a real-world dataset of Type Ia supernovae is conducted; its results are consistent with those of earlier studies using theformulation. A MATLAB package of numerical codes implementing the estimation of the solution path using the annealing with respect toin conjunction with the approximate CV formula and the instability detection routine is distributed in Obuchi (2019https://github.com/T-Obuchi/SLRpackage_AcceleratedCV_matlab).
Hydrodynamic and gasification studies of sawdust in a pressurized circulating fluidized bed
Authors: Mahapatro Abinash , Mahanta Pinakeswar
Published: August 2019

The present research is focused on the hydrodynamics and gasification studies of a pressurized circulating fluidized bed (PCFB) gasifier considering saw dust as a bed inventory. The operating pressure range of the PCFB gasifier is maintained in between 1 to 4 bar and the suspension density, syngas composition, lower heating value (LHV), gas yield, carbon conversion efficiency (CCE) and cold gas efficiency (CGE) were calculated and presented in this paper. The suspension density increases with rise in operating pressure and decreases with rise in superficial velocity. The concentration of CH4 in the syngas was found to be increasing with rise in bed pressure and is found to be 4.78 % at 4 bar. However, no significant effect of operating pressure on H2 concentration is observed and is found to vary between 8.3 to 7.95 %. The CO concentration increases up to 2 bar pressure and decreases gradually afterwards. The LHV, gas yield, CCE and CGE has a positive response to the rise in operating pressure and found maximum at 4 bar. The CCE and CGE of the PCFB gasifier are increased by 57 % and 58 %, respectively when the operating pressure is changed from 1 to 4 bar.
Load Compensator with an Energy Storage for a Grid Connected PV Based Active Generator
Authors: Konara K. M. S. Y. , Kolhe M. L. , Sharma Arvind
Published: August 2019

At present, in order to build a sustainable economy with less greenhouse emission, the attention has been drawn towards the smart grid concept. In this context, grid connected photovoltaic (PV) systems play a major role. When it comes to grid connected PV systems, the intermittent nature of PV generation and the uncontrolled power injection may cause excess variations in the grid voltage, frequency and the power quality. Therefore, the concept of active generator with innovative energy management strategies is a good alternative with which the PV generated power can be injected to the grid in a controlled manner while achieving the output power quality, instantaneous power, balance, frequency control and voltage control. This work proposes an innovative architecture for a grid connected PV based active generator with multi sources; a PV array, battery and the grid supply which are connected to a common AC bus as well as it analyses the innovative load flow control strategy associated with the proposed architecture. To make sure an uninterruptable power supply to the load, PV arrays inject the generated power in maximum power point tracking mode and the battery compensates the power requirement in coordination with the grid while maintaining the frequency stability within the system. Therefore, this paper analyses the performance of the energy controller and the load management capability of the proposed system while achieving the frequency control.
Analytical Modelling of Power Swing and Validation Using Real Time Digital Simulator
Authors: Zeno A , Orillaza J R , Kolhe M L
Published: August 2019

Grid disturbance is one of the largest areas of concern in the protection of power systems after high penetration of distributive generation. They are responsible for causing mass blackouts. This paper analytically derives the equations for resistances and reactances as a function of time. The derived expressions were validated using real time digital simulator (RTDS) for variation in power factor of system and frequency of the power swing. Results signify that the derived equations were able to provide the locus of instantaneous values of the real time power swing occurring in the system for changes in power factor and swinging frequency. Two dimensional R-X plane and three dimensional R-X-t space plots were also used to study the static and dynamic variations of impedances in time domain. The expressions r(t) and x(t) will be useful in determining the instantaneous short circuit ratios and also for tuning the impedance relays.
Comparative analysis of Artificial Neural Networks with conventional methods for extrapolation of wind speed at an elevated height
Authors: Bhavsar Dhrumin , Bhatt Mohil , Choksi Mehul , Nagababu Garlapati
Published: August 2019

Due to rapidly increasing pollution, it becomes necessary to substitute fossil fuels, and as wind energy is available quite easily and in abundance, researches are carried out in this area. These facts make it imperative to know about the variables and the problems involved behind it. The wind speed is a random variable, and it depends on atmospheric factors like pressure, relative humidity, wind dispersion & wind direction. This paper introduces the method to effectively predict wind speed by making use of the Levenberg-Marquardt backpropagation algorithm in artificial neural network (ANN) and by conventional means like power law & log law in MATLAB. Data from the Gulf of Khambhat, Gujarat provided by LIDAR for a period of 8 months, was used to prepare valid data set to train the neural network and to build a model to predict wind speed. After obtaining a histogram of the predicted values by log law, power law and ANN, it was seen that wind speed values obtained by ANN were quite close to actual values than the values obtained through the other methods. A comparison in terms of root means square error and percentage of the number of data indicates that developed neural network gives less root mean square error and a higher percentage of data whose absolute error lie between -0.2 and 0.2.
The mechanical oscillation of a single carbon nanocoil driven by a focused laser beam
Authors: Liu Y L , Shen J , Sun Y M
Published: August 2019

We have determined the mechanical properties of a long single carbon nanocoil (ALS-CNC) interacting with a focused laser beam. The mechanical oscillation properties of ALS-CNC in liquid based on the interaction of a CNC with light have been demonstrated. Considering the viscous force of a liquid, ALS-CNC oscillation does not occur by laser irradiation when ALS-CNC is in air. A CNC switch controlled by laser irradiation was realized. The first section in your paper.
Frame work for the Development of Occupational Safety and Health Assessment Model for Libyan Iron and Steel Industry
Authors: Yousuf Blaou Alsaddeeq Basheer , Abdol Rahman Mohd Nasrull , Hassan Mohd Fahrul , Ahmed Badi Ibrahim , Abdullahi Tijjani
Published: August 2019

The aim of this study is to find an efficient method for assessment of occupational health and safety management (OHSM) practices which focused on the complexity of the iron and steel industry. Indeed, there are several method used in process management assessment but unfortunately, it does not hold the interaction that can exist between the health and safety risks management process and the complexity of iron and steel industry. To remedy this disadvantage, this study proposed reducing the number of indicators down to several or major KPIs. In order to achieve the selection of small set of KPIs from the larger set of PPIs, a SMART criteria and AHP in the domain of multi-criteria decision making (MCDM) analysis is proposed to be employed for developing a model for the assessment of OHSM practices in Libya iron and steel industry. The enterprises’ safety performance index would benefit from the new assessment model.
Material removal rate and machining accuracy of electrical discharge machining (EDM) of Inconel 718 using copper electrode
Authors: Ahmad S , Chendang R N , Supawi A , Lajis M A , Zaman M H K
Published: August 2019

Electrical Discharge Machining (EDM) is a non-contact thermal machining process capable of machining conductive and semi-conductive materials. These capabilities bring to admission of machining materials that characteristically difficult to machine such as Inconel 718 due to its ability to maintain hardness at elevated temperature. Nickel based super alloy, Inconel 718 is one of the difficult to machine material that widely used in such high temperature application. The purpose of the study is to examine the Inconel 718 machinability by applied variable parameters such as peak current, pulse duration and repetitive used of electrode. To obtain the high performance measure in EDM, the selected peak currents were high where it is from 20 to 40A while for pulse duration is from 200 to 4μs. The performance measure that being evaluated are material removal rate (MRR), surface topography and machining accuracy. This research used Copper as electrode due to its high electrical conductivity and achieved highly in MRR. With the series of repetition used of electrode, the carbon layer known as black layer will formed at the surface contact of electrode. The relationship between the parameters and performance measure were more profound through the combination of machining parameters and black layer on the electrode. At high material removal rate, the surface topography of Inconel 718 look rougher with bigger sizes of nodules and craters produced. In the case of machining accuracy, it was found that, overall diameter overcut are less than 3.47%. The result shows that, even applying high peak current and pulse duration, the results of the machining accuracy is still acceptable.
Musculoskeletal symptoms and ergonomic risk assessment among production operators at manufacturing industries: A review
Authors: Segar Ganaswaran , Abdol Rahman Mohd Nasrull
Published: August 2019

Musculoskeletal symptoms are prevalent and represent the most common health problem among manufacturing operators in industrial-developing countries, with considerable costs and impact on quality of life. Because of incorrect workstations and lack of employee education in basic biomechanical principles, many of the workers are still in high risk injury. The aim of this study is to understand the impact of ergonomics implementation among production operators as the risk factors of musculoskeletal symptoms. Operators are normally exposed to a variety of risk factors such as awkward and static postures, repeat movement, and powerful effort. Manufacturing operators are thus considered at risk from developing musculoskeletal symptoms (MSSs). This review evaluates selected papers in manufacturing industries that have studied risk factors of musculoskeletal symptoms among manufacturing operators. Furthermore, other related industry studies have been reviewed as applicable. To understand the risk factors of musculoskeletal symptoms among manufacturing operators, it is recommended that future studies be required to assess these risk factors among manufacturing operators.
Preliminary Study of Kansei Engineering (KE) for Societal Performance in Sustainable Product Design
Authors: Hassan Mohd Fahrul , Annuar Eka Ariefzakwan , Kiong Sia Chee , Azlan Mohd Azwir , Abdol Rahman Mohd Nasrull , Ahmad Md Fauzi
Published: August 2019

Nowadays, product development indicates that a product’s success in the market is determined by the inclusion of consumer’s technical needs for product design. However, implicit feelings and impressions by the consumers is quite challenging because they cannot be externally assessed. Therefore, the makers aim to figure out the factors that contribute to the purchaser’s fulfilments of their product. This paper introduces indicators that can be used to fulfil consumers’ needs specifically to handle the implicit needs of consumers in sustainable product design based on Kansei Engineering (KE) approach. KE is a Japanese design method used to translate feelings into product parameters and was used to look at the car design features of a consumer’s dream car. Preferences of four design features (safety, conveniences, car interaction, and size of capacity) were explored in a sample population of sixty university students through questionnaires. Seven kanseis/feelings elicited by phones were determined to be important to this group: (1) Dynamic, (2) Easy, (3) Elegant, (4) Personality, (5) Positive physical traits, (6) Sophisticated, and (7) Technology. This study chooses to explore the use of Descriptive Statistical and Correlation Component Analysis for statistical significance of the data set as the main method of analysis to determine whether there is a significant difference between the car design features and between the society‘s rating of the car features through Kansei words. Utilizing the system will help another automobile plan that matches consumers’ needs to be proposed.
On the magnetic Hooke-Newton transmutation of electrons
Authors: Lin De-Hone
Published: August 2019

The author investigates the Hooke-Newton transmutation of the electron in the uniform magnetic field. Two results are reported. First, the modulable quantum spectrum and spinor of the magnetic field are given. Spin exhibits its effect, even in the first order approximation of the power series expansion of the spectrum. Since the transmuted Coulomb interaction, attractive or repulsive, is determined by both the signatures of the charge and the total angular momentum, the pure spin states of different orientations experience the reverse Coulomb forces. This feature may be useful in grouping the pure spin states of the same orientation. Second, it is shown that the effect of the effective vector potential due to the geometry of conformal mapping can be generated by the vector potential of two fractional magnetic fluxes with the reverse directions which couple to the different components of the spinor. The equivalence shows the possibility of demonstrating the physics of the 2D electron in conformal space with an isotropic momentum modulation while interacting with the field of the magnetic fluxes.
Efficiency and spectral performance of narrowband organic and perovskite photodetectors: a cross-sectional review
Authors: Pecunia Vincenzo
Published: August 2019

The capability of detecting visible and near infrared light within a narrow wavelength range is in high demand for numerous emerging application areas, including wearable electronics, the Internet of Things, computer vision, artificial vision and biosensing. Organic and perovskite semiconductors possess a set of properties that make them particularly suitable for narrowband photodetection. This has led to rising interest in their use towards such functionality, and has driven remarkable progress in recent years. Through a comparative analysis across an extensive body of literature, this review provides an up-to-date assessment of this rapidly growing research area. The transversal approach adopted here focuses on the identification of: (a) the unifying aspects underlying organic and perovskite narrowband photodetection in the visible and in the near infrared range; and (b) the trends relevant to photoconversion efficiency and spectral width in relation to material, device and processing strategies. A cross-sectional view of organic and perovskite narrowband photodetection is thus delineated, giving fresh insight into the status and prospects of this research area.
Advances in micro cutting tool design and fabrication
Authors: O’Hara John , Fang Fengzhou
Published: August 2019

Microcutting is a precision technology that offers flexible fabrication of microfeatures or complex three-dimensional components with high machining accuracy and superior surface quality. This technology may offer great potential as well as advantageous process capabilities for the machining of hard-to-cut materials, such as tungsten carbide. The geometrical design and dimension of the tool cutting edge is a key factor that determines the size and form accuracy possible in the machined workpiece. Currently, the majority of commercial microtools are scaled-down versions of conventional macrotool designs. This approach does not impart optimal performance due to size effects and associated phenomena. Consequently, in-depth analysis and implementation of microcutting mechanics and fundamentals are required to enable successful industrial adaptation in microtool design and fabrication methods. This paper serves as a review of recent microtool designs, materials, and fabrication methods. Analysis of tool performance is discussed, and new approaches and techniques are examined. Of particular focus is tool wear suppression in the machining of hard materials and associated process parameters, including internal cooling and surface patterning techniques. The review concludes with suggestions for an integrated design and fabrication process chain which can aid industrial microtool manufacture.
The Contributions of Active Spanish-English Bilingualism to Cognitive Reserve among Older Hispanic Adults Living in California
Authors: Arce Rentería M , Casalletto K , Tom S , Pa J , Harrati A , Armstrong N , Rajan K B , Manly J , Mungas D , Zahodne L
Published: August 2019

Objective

Bilinguals may be able to retain similar levels of cognitive functioning given age and/or Alzheimer’s Disease-related neurodegeneration, compared to monolinguals. Many studies have yielded equivocal findings that may be explained by within-group differences among bilinguals, such as frequency of language use. The current study aimed to clarify the role of frequency of bilingual language use (i.e., active versus passive) in the association of brain structure and memory. We hypothesized that active bilinguals would demonstrate better memory performance compared to passive bilinguals and monolinguals, and that active bilingualism would buffer the effects of temporal lobe integrity on memory.

Participants and Method

In a longitudinal aging study, 217 older Hispanic adults (Age M = 74 years, SD = 6; 70% women) underwent neuropsychological evaluation and 1.5T MR imaging. Bilingualism was determined by self-reported use of English and Spanish. Active bilinguals reported using both languages daily. Multiple regression tested main effects and interactions of bilingualism and entorhinal cortical thickness on semantic and episodic memory, adjusted for age, sex/gender, and education.

Results

Bilingualism was associated with better semantic memory(F[2,209] = 6.25, p = .002) but not with episodic memory(F[2,209)] = 0.34, p = .71). There was a significant bilingualism X entorhinal cortical thickness interaction on semantic memory (β = -.26, p = .02), indicating that active bilinguals were better able to maintain cognitive functioning with lower cortical thickness, compared to passive bilinguals and monolinguals.

Conclusions

Active bilingualism may protect semantic memory against cortical thinning of the entorhinal cortex. Future studies will explore whether this relationship remains after accounting for additional environmental and sociocultural factors (e.g., immigrant status) that influence the ability or opportunity to become bilingual, and whether active bilingualism affects cognitive trajectory in late life.
Culture and Diagnosis of MCI in Hispanics: A Literature Review
Authors: Briceño E , Mehdipanah R , Gonzales X , Langa K , Levine D , Garcia N , Longoria R , Giordani B , Heeringa S , Morgenstern L
Published: August 2019

Objective

Hispanics are a rapidly growing and aging segment of the US population. There is a critical need to accurately and efficiently detect those at risk for dementia, particularly those with Mild Cognitive Impairment (MCI). MCI diagnosis typically relies on neuropsychological tests, although cultural and linguistic factors impact neuropsychological test scores. The current study reviews neuropsychological studies on MCI in Hispanics to evaluate the factors in testing for MCI diagnosis.

Participants and Method

Studies were identified from a literature search utilizing Web of Science, PubMed, Google Scholar, and Scopus, using search terms “Hispanic OR Mexican American” and “Mild Cognitive Impairment,” and from the reference sections of studies identified through this search. Studies utilizing neuropsychological tests in the diagnosis of MCI for Hispanics living in the US were identified and reviewed. Approaches for sample characterization (e.g., country of origin and of education, literacy, language preference and proficiency), neuropsychological test methods (e.g., test selection and translation, normative data source), and method of MCI diagnosis were reviewed.

Results

Considerable variability was found across studies with regard to the incorporation – and the method of incorporation – of cultural factors and their consideration in the MCI diagnosis process for Hispanics. For example, several studies did not report their sample’s country of education, source of normative data used for determination of cognitive impairment, or method of test adaptation/translation.

Conclusions

Diagnosis of MCI in Hispanics has been complicated by a dearth of culturally appropriate neuropsychological assessment tools and normative data, which likely contributes to inconsistency across studies. Future studies are needed to further develop culturally appropriate neuropsychological methods to evaluate MCI in Hispanics in the US and to improve diagnostic accuracy in this population.
Health Literacy is Linked to Executive Functioning in Older American Indians
Authors: Burks A , Avila J , Kaz G , Pacheco S , Verney S
Published: August 2019

Objective

Health literacy (HL), the ability to understand one’s own medical conditions and navigate the healthcare system, is strongly associated with both educational achievement and executive functioning. Many American Indians (AIs) have experienced trauma in early education, such as forced removal into harsh boarding school systems; these experiences may impact their educational achievement, and subsequently, HL. Further, AIs disproportionately experience a myriad of chronic diseases. The goal of this study is to investigate the relationship between HL and executive functioning in older AIs.

Participants and Method

Participants were recruited from a southwestern urban area, who self-identified as AIs, aged 55 to 80 (n = 43). Participants were asked to complete a series of questionnaires, interviews, and neuropsychological tests over two sessions, the second session was optional. This poster investigates the data from participants who completed both sessions. We created a composite variable of HL measures, (Rapid Estimate of Adult Literacy in Medicine, Newest Vital Sign, and the Short Test of Functional Health Literacy in Adults verbal and numeracy z-scores).

Results

HL was positively correlated with both WASI Matrix Reasoning and WASI Similarities. Similarly, HL was positively correlated with Verbal Semantic Fluency (VSF) – Animals and Plants. However, there was no significant correlation between HL and VSF – Fruits and Vegetables or HL and Trails Making – B.

Conclusions

These findings suggest that HL and executive functioning are linked in older AIs. Discrepancies between the executive functioning tests (VSF – Animals, Fruits/Vegetables, and Plants) may be due to resources, culture, and education quality. These findings highlight the need for further investigation of cultural context and the accompanying development of culturally appropriate measures.
Drug use and Visual-Motor Integration in a Sample of Hispanic Women
Authors: Diaz B
Published: August 2019

Objective

The use of illicit drugs has increased dramatically over the past two decades among Hispanics. Neurocognitive impairments and morphological alterations have been linked to the use of drugs among the Hispanic population. However, even when increased attention is paid to the impact of drug consumption on neurocognitive functions among Hispanics, the majority of publications have been limited to male samples. This is relatively important, considering that women who consume illicit drugs appear to be more vulnerable in developing drug dependence and exhibit more neurocognitive impairment when compared to men. The present study aims to determine the impact of drug consumption in the visual-motor integration in a sample of Puerto Rican women. Our hypothesis was that Puerto Rican women who consume illicit drugs would perform poorly on visual-motor integration when compared to non-consumers.

Participants and Method

A total of 59 Puerto Rican women participated in this cross-sectional study. The participants were divided into three groups according to the criteria of: consumers, non-consumers, and abstinence. To evaluate the visual-motor integration, we administered the neuropsychological Bender-Gestalt-II test to all participants.

Results

A Kruskal-Wallis analysis revealed that there was a statically significant difference in the visual-motor integration between groups (H(2) = 12.69, p = 0.02), with a mean rank of 28 for consumers, 40 for non-consumers, and 21 for abstinence group. However, there was no significant difference between the abstinence and consumer groups in their visual-motor integration (p = .217).

Conclusions

These results suggest that the use of drugs can impact some neurocognitive functions, such as visual-motor integration in women, and can lead to a decline in such functions- even after sustained abstinence.