bluuebunny/crossref_metadata_2025_split huggingface dataset:
Thermoelectric Properties of BiTe
Authors: Faisal Fikri Oktaviantoni , Singsoog Kunchit , Melania Suweni Muntini , Seetawan Tosawat 
Published: January 2020

Abstract
Research on crystal structures and thermoelectric properties has been carried out using BiTe material. The sintering method used is hot press. Hot press pressure comes from the bottom up. Temperature variations used in hot press are 400, 450, and 500°C. Analysis of crystal structure used XRD. Based on the XRD results, the result is that the crystal structure of BiTe bulk is hexagonal. Thermoelectric properties measurements used ZEM-3. The sample is measured in a temperature range of 50–200°C. Based on the measurements, the sample with hot press 500°C has the highest Seeback coefficient and power factor values which are –71µV/K and 3.6 x 10–4 W/mK2, respectively. The sample has the best performance at room temperature and has decreased performance with increasing temperature. While, the best electrical resistivity value is owned by the sample with hot press 450°C with a value of 1.28 mΩ cm at room temperature. Overall, the higher the temperature used when sintering, the better the performance produced. Thus, the BiTe material can be considered as a thermoelectric material.
Effect of Temperature and Residence Time Torrefaction Palm Kernel Shell On The Calorific Value and Energy Yield
Authors: Dirgantara M , Karelius  , Cahyana B T , Suastika K G , Akbar A RM 
Published: January 2020

Abstract
Torrefaction was thermochemical processes to make biomass a fuel that had better properties, such as increased carbon content and calorific value. It was a temperature-sensitive process that was effective between 200 °C and 300 °C in an inert environment with a residence time of 20-60 minutes. Palm kernel shell was one of the biomass that has the potential to be used as fuel, where its availability was abundant and has good physical properties. In this study of palm kernel shell torrefaction was carried out from 0.5 cm sieve with three variations in temperature and residence time follows 250 °C - 300 °C and 20-40 minutes. The results obtained were the increase in temperature and holding time causes an increase in the calorific value but relatively on energy yield because of a large mass loss at a temperature of 300 °C. The optimum process for torrefaction of palm kernel shell according to calorific value and energy yield was 275 °C with residence time 20 minutes.
Environmental assessment of pre-feasibility of smart offshore npp (onpp) technology for indonesia: a-review
Authors: Santosa Sigit , Khotimah Khusnul , Yasmine Hanna , Kurniawan Rusbani 
Published: January 2020

Abstract
Land needs for energy infrastructure needs, such as the construction of the planned NPP in Jepara, Central Java, often lead to conflicts with the communities because they consider the existence of this infrastructure will Cause environmental damage. One of the solutions studied to improve the development and move the nuclear power plant is to move the location of the nuclear power plant from land to offshore. Besides, Indonesia has a potentially special offshore site on the eastern Sumatra coastline, northern Java coastline, and the Kalimantan coastline. The purpose of this paper is to review the environmental aspects of the implementation of GBS Nuclear power plant in Indonesia. The method used is the review of the literature and subsequently conducted a descriptive analysis. The results showed that SMART offshore NUCLEAR power plants should be considered because it offers clean energy sources, improved safety aspects, availability of offshore sites, and better community of acceptance.
The Role of pH in Synthesis Silver Nanoparticles Using Pometia pinnata (Matoa) Leaves Extract as Bioreductor
Authors: Handayani W , Ningrum A S , Imawan C 
Published: January 2020

Abstract
Green synthesis of silver nanoparticles (AgNPs) using plant extract have been developed due to ecological friendly and their simple procedure. Plant contains bioreductor to reduce silver precursor into nanoparticles. Plant compound beside of their medicinal properties also can be functional for this biosynthesis process. The synthesis process can be affected by pH, which can determine the shape and size from AgNPs. Therefore, in this research biosynthesis of AgNPs has been done to study the effect of aqueous extract pH on the AgNPs synthesize on acidic and alkaline condition. The synthesis was done by mixing 2% Matoa aqueous extract and 1 mM AgNO3 each solution adjusted to 4 and 11, and 5 as the nature pH for comparison. The AgNPs were characterized based on color changes, UV-Vis spectrophotometers, TEM (Transmission Electron Microscopy), and PSA (Particle Size Analyzer). The UV-Vis spectrum had absorption between 400-500 nm. The TEM results showed that the shape of the nanoparticles produced varies considerably from triangles, spherical, and hexagons. The PSA results show that increasing pH tend to produce the small size of nanoparticles, which had moderately stable nanoparticle and moderate stability. This result showed that the AgNPs synthesized can be optimized by adjusting the pH to obtain particular shape and size from the AgNPs.
Investigation on Physical and Optical of Praseodymium Doped Sodium Aluminium Barium Phosphate Glasses
Authors: Sangwaranatee N. W. , Kiwsakunkran N , Kaewkhao J 
Published: January 2020

Abstract
Sodium aluminium barium phosphate glasses doped with different concentration of Pr2O3 were synthesized by melt quench technique. These glasses were varied concentrations of Pr2O3 at 0, 0.05, 0.10, 0.50, 1.00 and 2.00 mol%. Their physical properties like density (ρ) and refractive index (n) were measured at room temperature. Also, optical absorption and photoluminescence spectra of these glasses have been acquired at room temperature. It was found that the intensity were increase with increasing concentration of Pr2O3. UV-Vis and NIR (250-2500 nm) spectra have been measured for all studied glass samples and discussed. The photoluminescence spectra recorded under 445 nm excitation exhibited the emission bands at 528, 598 and 639 nm corresponding to the emission transitions 3P1 → 3H5, 1D2 → 3H4, and 3P0 → 3F2 respectively. The Judd-Ofelt (JO) parameters Ωλ (λ = 2, 4 and 6) have been calculated to explore the bonding environment around the Pr3+ ions. The CIE chromacity color coordinates (x,y) are calculated from the emission spectra which indicates the located in the yellow-orange region. The prepared glasses are potential candidates for laser applications.
Computational Modelling Based on Modellus to Improve Students’ Critical Thinking on Mechanical Energy
Authors: Jonny Haratua Panggabean , Rajagukguk Donna , Rajagukguk Juniastel 
Published: January 2020

Abstract
Mechanical energy is one of the topics of learning physics in high school that is related to concepts and mathematical equations. Modellus is a computer application designed to explore mathematical models based on functions that are represented in the form of animations, graphics, and tables that are useful for focusing learning activities on understanding student physics concepts. In this study describes computational modelling activities using Modellus software and carried out the Modellus quality testing phase as a medium of physics learning to improve understanding of students’ concepts on the topic of mechanical energy. Based on the data obtained, Modellus is included in the “very good” category used in physics learning especially on the topic of mechanical energy and critical thinking skills students obtain an average score of 65,45 in the “good” category using Modellus.
Automatic and Realtime Control of pH Level in Water Catfish Cultivation
Authors: Fathurrahman  , Nasution T I , Ningsih H W , Tarigan K , Pulungan I H 
Published: January 2020

Abstract
A water pH control device in catfish cultivation has been successfully made and tested. The working principle of this device has been designed to maintain the pH of catfish pond water in the range of 6,5-8,5. It was found that if the pH value was outside this range, the sensor ordered the water pump to automatically and in the realtime drain the pond water through a filter to return the pH to the specified value. Thus, the application of this sensor has succeeded in reducing catfish deaths due to stress.
Ergonomics Analysis Of Public Seat In The Kudus Town Square
Authors: Sokhibi Akh , Alfarisi Salman , Ajeng Alifiana Mia 
Published: January 2020

Abstract
The public seat is one of the public facilities provided by the government as a form of public service to improve better human development. Public seats are in public buildings, public parks, city squares. In the Kudus town square, there are two types of public seats that are widely used by the public. However, the public seats provided do not have a backrest and elbow rest. Therefore ergonomics analysis is needed to determine the comfort level of public seats. Qualitative methods have been used by taking data about the height of users of public seats using random sampling. Then the data is used to calculate anthropometric measurements of chairs based on the comparison of body size to the height from the ASEAN Regional Institute for School Boarding Research. Based on research that has been done, the results obtained in the form of public seats in the Kudus town square designed by not considering aspects of ergonomics.
The Dynamics of Ureter Changes After Medial and Distal Unilateral Ureteral Obstruction in Rat
Authors: Rickyawan Nofan 
Published: January 2020

Abstract
Unilateral ureteral obstruction is an abnormality that often occurs in the urinary tract. Obstruction can be placed proximal, medial or distal ureter. The physiological response that occurs depends on the severity, duration, location and type of obstruction. The aim of this study was to look at the macroscopic and histopathological changes of the ureter also Hydronephrosi Hydroureter Index after medial and distal unilateral ureteral obstruction. Thirty-six white rats were divided into 3 groups and each group consist of 12 individuals. Group I as a control got a laparotomy without ureter ligation. Group II laparotomy with medial right ureteral ligation and group III laparotomy with distal right ureter ligation. Three rats in each group were randomly collected at weeks 1, 2, 3 and 4 after treatment. The kidneys and ureters were removed from the abdominal cavity to measure the diameter of the ureter and weigh. After the accumulated liquid was taken, the weighing was done again. An ureter sample was taken for histopathological preparations. The results of the macroscopic and histopathological examination of the ureter were discussed qualitatively. Measurement of the diameter and thickness of the ureteric wall was analyzed using statistical analysis of factorial pattern variations 3x4. The accumulation of fluid in the ureter causing changes in the shape, color, size and structure of the ipsilateral ureter in both ligation groups. Histopathological observations showed depletion, alteration and damage to the structure of the ipsilateral ureteric wall structure. Unilateral ureteral obstruction affected ureter diameter increase, thinning of the ureteral wall and ipsilateral IHH (P <0.05). The presence of unilateral ureteral obstruction had no impact on the contralateral ureter (P> 0.05).
The Effect of Quercetin towards Adipocytes Count in Toxoplasma gondii Profilin - exposed Adipocytes In Vitro
Authors: Setia Y D , Poeranto S , Hernowati T E , Iskandar I , Sudjari  
Published: January 2020

Abstract

Toxoplasma gondii is one of the protozoan causes of chronic infection that allegedly causes obese (infectobesity). Some previous studies have showed that profilin Toxoplasma gondii has a role in inflammation by promoting interleukin-12 (IL - 12) which induce adipocyte dysfunction through the hyperplasia and hyperproliferation of adipocyte cells. Those processes lead to metabolic syndrome which increase adipocytes count through reducing insulin receptor’s sensitivity. On the other hand, Toxoplasma gondii, as an obligate intracellular parasite, can also damage the pancreatic beta cells. In response to inflammation, adipocytes produce Reactive Oxygen Species (ROS). To scavenge ROS antioxidants are required. Quercetin, an exogenous antioxidant, can be widely found in natural products that might be a promising candidate for development of antioxidant treatment interventions to prevent adipocytopathy. This research aims to explore the effects of quercetin towards Adipocytes Count stimulated from T. gondii profilin-exposed adipocytes. This research using visceral adipocyte rat that was cultured in Dulbecco’s Modified Eagle Medium (DMEM). After 70% confluency, adipocytes were exposed to 20 μΜ T. gondii profilin and treated with four doses of quercetin; 31.25, 62.5, 125, and 250 μΜ that incubated 48 hours. After incubation period, adipocytes were observed using inverted microscope and were captured in high power field magnification using camera. Adipocytes were counted from each captured photo and all groups were analyzed using Analysis of variance (ANOVA) test. The results showed that quercetin significantly reduced adipocyte cell count T. gondii profilin-exposed adipocytes compared to untreated cells (ANOVA p = 0,00). The effective dose to lower adipocyte cell count was 31,25 μΜ. This study implies that quercetin has a potent antioxidant that can prevent toxoplasmosis-mediated adipocytopathy.
Supporting Factors to Improve the Lack during Lean Manufacturing Implementation
Authors: Mardiana Dewi Putri , Alfarisi Salman 
Published: January 2020

Abstract
Product quality and customer satisfaction were challenges faced by many manufacturing or services companies which considered the global challenges, thus encouraged many companies to improved quality and satisfied costumer needs. Most of companies implemented lean with their unique way it caused by internal problems such as the lack of knowledge and understanding of lean, and etc. This can result the lack in implementation lean manufacturing. To avoid the lack in implementation of lean manufacturing required support factors such as support factors continuous improvement (kaizen). For this reason, previous literature research needed to resolved this problem. Implementation of lean manufacturing required good leadership that impacts in implementation process and employee contributions.
Android-Based Lecturer Workload Simulation Application
Authors: Triyanto Wiwit Agus 
Published: January 2020

Abstract
In carrying out their duties, lecturers must conduct Tri dharma education activities which include teaching, research and service according to their respective fields of science. Every tri dharma activity carried out must be reported once every semester in the form of a lecturer workload report.The number of activities contained in the rubric makes many lecturers experience confusion to calculate how the credit performance in the Tridharma activities carried out. Therefore, it is necessary to have a simulation application that helps the calculation of credit performance of Tridharma activities in accordance with the BKD rubric. The lecturer workload simulation application can help lecturers to calculate credits for the Tridharma activities that have been carried out. The lecturer workload simulation application can also provide information on what physical evidence needs to be prepared by the lecturer.
Optimization Model for Subsidized Housing using Linier Programming Associated with Land Suitability
Authors: Murti Alif Catur , Ghozali Muhammad Imam , Sugiharto Wibowo Harry 
Published: January 2020

Abstract
The increasing population from year to year raises the problem of population density. The population density of the Kudus Distric from 2010 to 2014 increases in quality every year. Recorded in the Central Bureau of Statistics in 2010 the population density (Soul Per Km2) around 1833 and in 2014 reached 1931. Population growth rate is proportional to the growth rate of existing houses as shelter. The Government of Kudus District as a program implementing “million houses” from the President of the Republic of Indonesia provides solutions in terms of security in the administration of land administration. Developers of subsidized housing need to take several aspects in development, such as Spatial Planning in each region, especially Kudus District, the long-term program and government functions. There needs to be a system capable of determining the optimal level of the type of housing to be built with the suitability of existing land. There needs to be a system capable of determining the optimal level of the type of housing to be built with the suitability of existing land. condition that need to reach the optimal level can be done by using linear programming method. All these things can be integrated and execute with the existence of eco-friendly Development System
The effect of plastic deformation on the temperature dependences of ultrasonic velocities in Al-Mg alloy
Authors: Kurashkin K V , Gonchar A V 
Published: January 2020

Abstract
This work deals with an experimental investigation of the effect of damage resulting from plastic deformation on the temperature dependences of ultrasonic velocities in 93% Al -6% Mg alloy. For samples with different degrees of plastic deformation, the velocities of shear and longitudinal waves linearly decrease with increasing temperature from 230 K to 320 K. For both shear and longitudinal waves, results showed the average value of the temperature-velocity factor varies linearly with plastic deformation. The discovered structural sensitivity of the temperature-velocity factor opens up new possibilities for nondestructive evaluation of metal alloys with accumulated damage, but requires further research.
Theoretical investigation of the deformation stability and thermostability of carbon diamond-like phases
Authors: Greshnyakov V A , Belenkov E A 
Published: January 2020

Abstract
In this work, first-principle calculations of the mechanical and thermal stability of diamond-like LA3 and LA5 phases with equivalent atomic positions were carried out. It was established that these phases can be stable under uniaxial deformations in the pressure range from -62 to 85 GPa. The calculations also showed that LA3 and LA5 phases should be stable at a temperature of 500 K and normal pressure.
The use of generalized models in the variational formulation of the prediction tasks defining characteristics of composite materials
Authors: Gusev E L , Bakulin V N 
Published: January 2020

Abstract
Within the framework of variational refined statements of inverse problems of forecasting, thequestions of development of effective, refined methods of forecasting resource, strength, reliability, durability of structures made of polymeric, composite materials are investigated. Formulated the principle of a plurality of prediction models, whose inclusion in the refined formulation of the inverse task of forecasting opens new and promising possibilities to improve the efficiency of solving problems of forecasting the defining characteristics of structure composites.
Hardening of coatings with Ni-Co-Cr alloy dye to nanostructure
Authors: Schmidt V V , Denisenko D V , Zhikhareva I G 
Published: January 2020

Abstract
The purpose – receiving a nanostructural electrochemical covering Ni-Co-Cr (Cr-NiCo) alloy with a high microhardness. The composition of electrolyte (a ratio of ions of metals in solution – Cr58.6Ni22.5Co18.9 (α-Cr + β-Ni + NiO); Ni58.7Cr25.0Co16.3(β-Ni + α-Cr)), optimum phase structure by means of 4 criteria of a phase formation. The nanostructure of d=50 of nanometer is received by means of special multifunctional additives. In the presence of H-acid a covering of Cr-Ni-Co HV = 690 MPa, and for (NH2)2CO additive – HV = 985 MPa possesses. Alloys are recommended for use in radioelectronics and microelectronics for resistor and the strain-resisting elements.
Molecular dynamics simulation of a nonequilibrium grain boundary in titanium under the ultrasonic action
Authors: Mukhametgalina A.A. , Nazarov A.A. 
Published: January 2020

Abstract
Effect of oscillating tension-compression stresses on a nonequilibrium grain boundary containing a disclination dipole in titanium is studied by means of molecular dynamics simulations. The system with nonequilibrium boundary was constructed by joining two bicrystals with tilt boundaries Ɵ = 36.87 ° and Ɵ = 28.07 °, thus the disclination dipole had a strength ω = 8.8 °. The system was relaxed and equilibrated at temperature T=300 K for 200 ps. Then a sinusoidal stress σ = σ0×sin (2πt / τ) with a period τ = 160 ps was applied along x axis at the same temperature and its effect on the structure of the bicrystal was studied. It is shown that under the action of oscillating stresses the nonequilibrium boundary emits lattice dislocations that sink at appropriate surfaces. This process is irreversible and leads to relaxation of the nonequilibrium structure of the boundary. There is an optimal amplitude at which the nonequilibrium boundary emits a sufficient number of dislocations to relieve internal stresses.
Study of the high-velocity impact of tungsten particles with a steel target
Authors: Petrov E V , Trofimov V S , Kopytskiy V O 
Published: January 2020

Abstract
The high-velocity impact of a tungsten particle flux with the surface layer of steel (U8) samples is studied. High-speed photography which was used to record the motion of tungsten particles and detonation products shows that tungsten particles move with an average velocity of 2.4 km/s. Microstructure studies have revealed that upon the impact of tungsten particles with the surface of the target, the temperature in the active zone exceeds the temperature of the peritectoid reaction in the Fe-W system, and the polymorphic transformation of iron takes place with the formation of austenite and the dissolution of tungsten carbide in austenite under these temperature conditions.
Investigation of the stress state of the connecting rod of the oppositional compressor and evaluation of the probability of its trouble-free operation
Authors: Petrova I M , Filimonov M A 
Published: January 2020

Abstract
Calculating and experimental methods were used to study the stress-strain state of the connecting rod of the oppositional compressor operating in the chemical industry. Computational and experimental methods for assessing the stress-strain state of the compressor connecting rod head were previously tested on models, since the connecting rods are large and conducting research on a running compressor is extremely difficult. Similarity criteria are defined that allow the methods and results of studies obtained on models to be applied to the assessment of the stress-strain state of connecting rods. The dependence of the contact angle between the connecting rod and the connecting rod finger on the load, the gap in the coupling and the geometric characteristics of the head was obtained. For the connecting rod head, a numerical experiment was used to calculate the stress state under loads and gaps in the connecting rod – pin, corresponding to the operational ones. Analysis of the stress distribution obtained by the calculation allowed us to estimate the dependence of stresses on the magnitude of the applied load, the magnitude of gaps in the interface and the change in the angular coordinates of the sections with the maximum stress values. Taking into account the obtained results, a method has been developed and a study of the stress distribution of the compressor head in operation has been carried out. For the maximum loaded sections of the connecting rod head, the fatigue resistance characteristics and the characteristics of regular variable loading in operation at rated load are determined. Based on the results obtained, the probability of failure depending on the magnitude of the loads and the size of the gaps was evaluated.