bluuebunny/crossref_metadata_2025 huggingface dataset:
An analysis of Coulomb stress change and triggering interaction toward seismic activities in the area West Sumatera within January 2000-June 2018
Authors: Asmaniar  , Affandi Azhar K , Sailah Siti , Ardiansyah Sabar , Wafiazizi Milzam
Published: August 2019

The West Sumatra region is one of the areas prone to earthquake disasters caused by 3 factors. First, namely the Subduction Zone, which is the meeting of two large tectonic plates of the Indian Ocean Plate subducting below the L200 plate of the Eurasian Continent. Second, the existence of the Mentawai Fault which is a horizontal fault due to the sloping subduction process around the Mentawai Islands. Third, the existence of the Sumatran Fault that occurs due to the existence of the Indo-Australian plate which crashes into the western part of the island of Sumatra tilted, resulting in pressure. This study aims to analyze the coulomb displacement of stress and trigger interactions on seismic activity in the West Sumatra region from January 2000 to June 2018 using earthquake data from the United States Geological Survey (USGS) catalog sourced from Global Centroid Tensor Moment Catalog (CMT) earthquake data, United States Geological Survey Catalog (USGS), International Seismological Center Catalog (ISC), ISC-EHB and Meteorology and Geophysics Agency (BMKG), covering the boundaries of -4° SL- 1°NL and 96° - 104°EL. With earthquake magnitude (Mw) ≥7 SR and depth of 1 to 500 km for calculation of Coulomb Stress. Whereas for seismicity later with magnitude Mw ≥ 3.0 up to 9.0 depths of 1 to 500 km Based on analysis of the earthquake on September 12th, 2007 Mw = 8.5 is a trigger earthquake that triggered all significant earthquakes Mw ≥7 SR, earthquake on September 13th, 2007 Mw = 7.9 is a trigger earthquake that triggered the earthquake that occurred on September 13th, 2007 Mw = 7.0 and February 25th, 2008 Mw = 7.2, the earthquake of February 25th, 2008 and September 30, 2009 was a category of non-trigger earthquakes while the earthquake was significant October 25th, 2010, distribution of stress changes Positive Coulomb is more dominant compared to the negative Coulomb voltage change distribution. This means that after a large earthquake occurred on October 25th, 2010, the Mentawai segment area still has a high accumulation of stress.
Sea surface temperature variability in the Makassar strait during ENSO (El niño Southern Oscillation) from the Terra-MODIS data sets
Authors: Purwandari R N , Mubarrok S , Mandang I
Published: August 2019

ENSO (El Niño Southern Oscillation) is an anomaly phenomenon of ocean-atmosphere system in the Pacific Ocean. This phenomenon also affects the condition of SST (Sea Surface Temperature) in Indonesian seas, especially Makassar Strait. The condition of SST is influenced by water mass from the Pacific Ocean that flows into Makassar Strait Indonesian Throughflow (ITF). The purpose of this study is to analyse the relationship between the SST and ENSO phenomenon in Makassar Strait. Oceanic Niño Index (ONI) used todeterminethe extreme ENSO events (El Niño and La Niña), and we compared the maximum and minimum value of SST between those events. The data used in this study is monthly average of SST level-3 from Tera-MODIS satellite and processed using software SeaDAS (version 7.3.2). During 17 years (2001 – 2017) there were 6 La Niña Phenomenon and 4 El Niño phenomenon. The result from this research indicates a relationship between SST and Enso Phenomenon, where the SST range in La Niña condition is higher that El Niño condition. The correlation value is 0.109. The monthly average of SST at La Niña Condition in the Makassar Strait has a values between 29.66 °C to 30.25 °C, while SST in El Niño condition is ranged from 29.91 °C to – 30.23 °C.
The attainment of 100 percent electrification ratio in the archipelago of Indonesia by people way electricity initiative
Authors: Legino Supriadi , Arianto Rakhmat , Pasra Nurmiati
Published: August 2019

The electrification ratio in Indonesia has reached over 90 percent already but it is not easy to attain the rest of people who have not gotten the light because they are living in the scattered and isolated areas over several thousand islands in the archipelago of Indonesia. Conventionally, the electricity service in Indonesia is developed by using a centralized and interconnected of various large scale units of power plants. However, many big project of a large size power plant is currently facing many challenges including land and acquisition, financial closing, complex permit procedures, and right of way for transmission lines. As a result, the cost of such conventional system cannot be offset by the expected efficiency from a better reliability and economies of scale of such conventional system. To address this problem, the School of Technology STT PLN Jakarta, proposes an initiative namely ListrikKerakyatan (LK), which is a simple and small scaleself manage electricity development by local people empowerment using renewable energy available around the communities. After passing several pilot projects, This LK initiative has already successfully implemented in Klungkung District, Bali, using the model, called TOSS (TempatOlahSampahSetempat), stands for localized municipal waste treatment. The pilot project shows that a 30 kW gasifeier genset including its associated unit TOSS for 3 ton of waste is cost around USD 40 thousands, the cost of which is still less than rural funding available from national budget. LK needs relatively little operational cost since its fuel is made from municipal waste.
Natural rubber composites for solid tyre used for forklift tensile properties and morphological characteristics
Authors: Nasruddin  , Bondan Aprillena T
Published: August 2019

The engineering of natural rubber and synthetic rubber into vulcanized solid tyres for forklifts has been carried out to obtain the optimum ratio of formula and process temperature according to the standards of solid tyre commercial forklifts. Composite formulated materials consist of natural rubber, synthetic rubber, carbon black, silica, calcium carbonate, and coal fly ash, while the temperature, time, and other process materials are fixed variables. The results of testing the mechanical properties of forklift solid tyres for formula C are as follows: specific gravity1.195 g/cm3 hardness78 Shore A, tensile strength 17.3 Mpa, tear strength 55.2 kN/m, abrasion resistance 160.8 mm3 modulus 300% is 6.6%, and ozone resistance at 50 pphm, 20% strain, 24 h, 40 °C is no cracks.
Synthesis and characterization of meropenem imprinted polymer
Authors: Sirumapea Lasmaryna , Ali Zulfikar M , Bachri Amran M , Alni Anita
Published: August 2019

Meropenem imprinted polymer (M-MIP) has been successfully synthesized. It is prepared by using meropenem (MERP) as template and acrylamide as functional monomer. For comparison, non-imprinted polymer (NM-MIP) was synthesized in the absence of MERP. The synthesized polymers were then characterized by infrared spectroscopy (IR) and thermogravimetry analysis (TGA). Extraction of template from polymer was conducted using soxhletation method and methanol-acetate acid (85:15) as the leaching solvent.. The prepared M-MIP showed higher adsorption capacity than the NM-MIP. Adsorption capacity of MIP and NIP were 4.8942 mg/g and 1.0078 mg/g respectively.
Determination of quality parameters in nata de cocolawak as hepatoprotector functional food
Authors: Solihah Indah , Miksusanti  , Novita Rennie Puspa , Ramadhan Sandy Yoga
Published: August 2019

One of the hepatotoxic condition is caused when consuming large amounts of drugs induced liver injury for a long period of time, such as in TB (tuberculosis) treatment [1]. One of the solutions to prevent the occurrence of hepatotoxicity symptoms in TB patients is by consuming temulawak (Curcuma xanthorriza Roxb.) supplements [2]. Temulawak supplement was given in the form of dessert nata de cocolawak to increase patient interest in consuming it because it is served in a better taste. Parameters product quality of food was determined based on SNI (Indonesian National Standard). This research was conducted in order to increase the economics and environment value of nata de coco products as a functional food. Based on the measurement results, the quality of nata de cocolawak products meets most of the SNI parameters for nata de coco products. Nata de cocolawak products have 9.56% of sugar, 2.11% of crude fiber, level of mineral content are 3.63 mg/Kg of iron, 58.25 mg/Kg of calcium, and 25.73 mg/Kg of zinc, level of metal contaminant are 0.005 ppm of Pb, 0.212 ppm of Cu, and negative levels for As. The Total plate count (TPC) on the product to measure microbial contamination is 5.5.102 CFU/g. Curcumin content as an active compound in the product is 1.306mg/g of sample. The treatment group had smaller ALT, AST, and ALP values than the placebo group. But statistically, these values did not differ significantly (p> 0.05).
Adsorption of congo red using Mg/Fe and Ni/Fe layered double hydroxides
Authors: Hidayati N , Apriliani D R , Helda  , Taher T , Mohadi R , Elfita  , Lesbani A
Published: August 2019

Layered double hydroxides with different divalent ions i.e. Mg/Fe and Ni/Fe were synthesized using coprecipitation method at basic condition. Materials were characterized using X-Ray diffraction and FTIR analyses. Furthermore, Mg/Fe and Ni/Fe layered double hydroxides were applied as adsorbent of Congo red dye in aqueous medium using batch system. Adsorption of Congo red on layered double hydroxides was investigated through kinetic and thermodynamic studies. X-ray diffraction analysis showed that unique diffraction of layered materials were identified at 2θ diffraction 11.33°, 29.55°, 59.66° (Mg/Fe) and 11.41°, 29.40°, 60.40° (Ni/Fe). Interlayer distance of Mg/Fe and Ni/Fe layered double hydroxides was 7.80 Å and 7.75 Å, respectively. IR spectrum of Mg/Fe and Ni/Fe layered double hydroxides showed that vibration of layered material was appeared at 1381 cm−1 (νN-O; nitrate), 347 cm−1 (νMg-O; layered double hydroxides), 586 cm−1 (νFe-O; layered double hydroxides) for Mg/Fe and 1381 cm−1 (νN-O; nitrate), 493 cm−1 (νNi-O; layered double hydroxides), 516 cm−1 (νFe-O; layered double hydroxides) for Ni/Fe. Kinetic pseudo second order was fitted than pseudo first order kinetic model for adsorption of Congo red with R ± 0.99 for both Mg/Fe and Ni/Fe. The rate of adsorption K
2 for Mg/Fe and Ni/Fe layered double hydroxides was 0.008 g.mg−1min−1 and 0.0058 g.mg−1min−1. Adsorption of Congo red on Mg/Fe and Ni/Fe layered double hydroxides was well described and following Freundlich adsorption isotherm model shows physical adsorption process on layered double hydroxides.
Modification of cellulose with acetic acid to removal of methylene blue dye
Authors: Hariani Poedji Loekitowati , Riyanti Fahma , Kurniaty Asri
Published: August 2019

The study on cellulose modification with acetic acid to cellulose-acetate has been carried out. Cellulose is extracted from the kepok banana peel (Musa paradisiaca L.). Modified cellulose acetate was characterized by FTIR spectroscopy and SEM-EDS. Cellulose acetate to removal of methylene blue with adsorption parameter include initial concentration (10, 20, 30, 40, 50, 60, 70, 80, 90 and 100 mg/L), pH solution (3, 4, 5, 6, 7, and 8) and contact time (15, 30, 45, 60, 75, and 90 minutes). The peak of FTIR cellulose acetate obtained by functional groups -OH, C-H, C=O, and C-O esters. The morphology of cellulose-acetate has a more homogeneous than cellulose. Adsorption of cellulose-acetate on methylene blue optimum at an initial concentration of 90 mg/L, pH of solution 6, and contact time of 30 minutes. The adsorption kinetics corresponds to pseudo-second order and adsorption equilibrium corresponds to Langmuir isotherms with adsorption capacity of 42.107 mg/g.
The Rationality of Antihypertensive and Oral Antidiabetic Patients with Chronic Kidney Disease with Hypertension and or Type 2 Diabetes Mellitus in RSI Siti Khadijah Palembang
Authors: Puspa Novita Rennie , Herlina  , Beumaputra Arya Prasetya , Hidayah Arini Alfa
Published: August 2019

Chronic Kidney Disease (CKD) is defined as a condition of kidney damage occurring for 3 months or more with a decrease in Glomerular Filtration Rate (GFR) of less than 60 mL/min/1,73m2. The etiology of CKD includes hypertension and type 2 diabetes melitus (DM). The existance of irrational using of antihypertensive drugs and oral antidiabetics in CKD patients with hypertensive etiology and or type 2 diabetes melitus leads to research on the rationality of antihypertensive and oral antidiabetics. This study aims to evaluate the rationality of antihypertensive and or oral antidiabetics of patients with kidney disease with hypertension and or type 2 diabetes mellitus in RSI Siti Khadijah Palembang. This research was done by descriptive analysis method, data collection was done prospectively. The data obtained were 5 samples that suits exclusion criteria as well as 20 samples that suits inclusion criteria. The results of evaluation of antihypertensive drug use were found to be 100% precise indication, 100% precise dose, 95% precise patient, 90% precise drug, and 10% of patients experienced side effects. The evaluation of the use of OAD were 100% precise indication, 100% precise dose, 100% precise patient, 100% precise drug, and 100% of patients had no side effects.
Utilization of remote sensing imagery data to determine the priority location of green open space as child-friendly integrated public space in Palembang City
Authors: Nafiudin Nurrohman , Ardiansyah  , Rokhmatuloh
Published: August 2019

Palembang is a metropolitan city in Indonesia. As the second largest city in Sumatra, the population of Palembang in 2016 was 1,602,071 people, with a population density of 3,999 people / km2. Meanwhile, the area of green open space has been reduced every year. Based on Minister of Public Works Regulation Number: 05/PRT/M/2008 concerning Guidelines for the Supply and Utilization of Green Open Space in Urban Areas, the percentage of urban areas used as green open space is a minimum of 30% of the total urban area, consisting of 20% public green open space and 10% private green open space. The existence of remote sensing imagery and geographic information systems, could help in determining the priority location of green open space as a child-friendly integrated public space in Palembang. The imagery that used in this research is Landsat 8 imagery, analyzed using ArcGIS 10.3. The research method is a quantitative method using a tiered approach. In general, the final result of the study is in the form of a map of priority locations for child-friendly integrated public space. The 5 Ulu urban village is the location that has the greatest potential to be developed into a child-friendly integrated public space.
Enhanced photocatalytic CO2 reduction activity of silvered titania prepared by wet deposition method
Authors: Handoko C T , Huda A , Bustan M D , Yudono B , Gulo F
Published: August 2019

Titania (TiO2) was successfully modified with Ag nanoparticles by wet deposition method. The established structures adopt the anatase crystal structure and contain a mixture of Ag° and Ag1+ species. The Ag loading triggers extended absorption in the visible light region. Furthermore, the Ag loading improves the photocatalytic CO2 reduction efficiency compared to the pure TiO2. The optimal Ag loading is 2% molar ratio of Ag versus TiO2 and the photocatalytic activity will decrease with higher Ag loading. This improved efficiency may be attributed to the synergistic effect between electron trapping and Surface Plasmon Resonance (SPR) phenomenon of Ag nanoparticle on TiO2 surface.
Microplastic contamination on Anadara granosa Linnaeus 1758 in Pangkal Babu mangrove forest area, Tanjung Jabung Barat district, Jambi
Authors: Fitri Syaidah , Patria M P
Published: August 2019

Anadara granosa is an important food source for people in Tanjung Jabung Barat District, Jambi. This study uses samples of cockle, sediment and water. The results showed a 100% sample containing microplastic. The types of microplastic found are fiber, fragments and films. The average microplastic amount in A. granosa individuals was 434 ± 97.05 particles/individuals. Fiber is the type of microplastic that is most commonly found in samples of cockles, sediments and water. In the blood cockles sample, fiber was found as much as 180.6 ± 21.22 particles/individual and 4.1 ± 0.43 particles/g cockle. Fiber is also found with high concentration in water samples of 128.3 ± 0.15 particles/L. The river is indicated as a microplastic source to the sea. The station sample 1 in 100 m near the river mouth has a higher microplastic concentration with an average of 448.3 ± 53.92 microplastic/individual, compared to station sample 3 which is only 420.3 ± 42.66 microplastic/individual.
Propagation for conserving endangered taxol producing tree Taxus sumatrana through shoot cuttings technique
Authors: Susilowati A , Rachmat H H , Kholibrina C R , Hartini K S , Rambe H A
Published: August 2019

Taxus sumatrana or commonly known as Sumatran yew is native endangered taxol producing trees from Indonesia and promising drug for cancer source. Due to very limited and restricted natural growing habitat, small population size and the tendency of habitat deterioration, their sustainable occurrence is facing a serious threats. Urgent task for conserving this species was needed. Shoot cutting is promising methods for solving natural regeneration problems of this species. This research was conducted to determine appropriate shoot cutting technique for propagating the species and hence conserving Sumatran yew. Completely Randomized Design Factorial with 2 factors and 20 replications was used in this research. The first factor was cutting medium the second factor was auxin addition. The observed parameters were survival rate, rooting percentage, primary root number and primary root length. The result showed that the percentage of rooted cuttings were varied from 50 to 65 percent depend on the treatment. Cutting media and auxin treatment significantly only affected primary root number. Combination of soil and husk with auxin addition produced the highest rooting percentage.
236U identification in the new AMS beamline at the TANDAR accelerator
Authors: de Jesús J , de Barbará E , Arazi A , Fernández Niello J , Martí G V , Abriola D , Cardona M A , Gollan F , Hojman D , Pacheco A J , Samsolo N
Published: August 2019

236U (T
1/2 = 23 My) is an excellent monitor for nuclear contamination in the environment. Indeed, spent nuclear fuels present isotopic ratios 236U/238U several orders of magnitude higher than natural samples. 236U also provides a useful fingerprint to identify and trace nuclear material for safeguards purposes. Here we describe a new beamline for the discrimination of 236U using the accelerator mass spectrometry (AMS) technique. This system comprises a Wien velocity filter and a 6.7 m long time-of-flight (ToF) path with a focusing quadrupole. The ToF is determined by a time zero detector and a surface barrier detector, which also provides an energy measurement. The capability of the system to discriminate 236U from the much more abundant isotopes 235U and 238U is shown. While sensitivity values of 236U/238U∼ 10−8 were achieved, ongoing works aim to improve this performance.
The low energy physics of quarkonium suppression in heavy ion collisions
Authors: Abreu L , Navarra F S , Nielsen M
Published: August 2019

In the late stage of relativistic heavy ion collisions there is a hadron gas phase, where particles interact at energies of the order of the temperature, i.e., ≃ 100 − 150 MeV. We discuss heavy quarkonium production and dissociation in this hot hadron gas. We review the theory giving special emphasis to our recent works on J/ψ and ϒ suppression in interactions with pions.
Using pulsar’s braking indices to estimate changes in their moments of inertia with age-related considerations
Authors: Oliveira H O , Magalhaes N S , Marinho R M , Carvalho G A , Frajuca C
Published: August 2019

Pulsars are modeled as neutron stars originated from the collapse of a progenitor one. In the canonical model they are described by spherical magnetized dipoles that rotate with the magnetic axis usually misaligned relative to the rotation axis, and such misalignment would explain the observation of radiation emitted in pulses in a certain direction rendering the typical observational characteristic of this kind of star. The frequency of such pulses decays with time and it can be quantified by the braking index (n). In the canonical model n = 3 for all pulsars but observational data show that n
[negationslash] = 3. In this work we present a model for the understanding of the frequency decay of the rotation of a pulsar adapting the canonical one. We consider the pulsar a star that rotates in vacuum and has a strong magnetic field but, in contrast to the canonical model, we assume that its moment of inertia changes in time due to a uniform variation of a displacement parameter in time. We found that the old pulsars that present high values of the braking index tend to present smaller internal displacements of mass, in particular the superfluid neutron matter in the core. We relate this trend to neutron vortices’ creep in rotating superfluids, indicating a possible reason for this coincidence.
Effect of the nucleon-nucleon interaction on the fusion cross-section within the relativistic mean field formalism
Authors: Bhuyan M , Kumar Raj , Carlson B V
Published: August 2019

We establish a relationship between the nucleon-nucleon interaction potential and the nuclear fusion reaction cross-sections at low energies. The axially deformed self-consistent relativistic mean field is used with the non-linear NL3* interaction parameter set. The Wong formula is used to estimate the fusion cross-section for 58Ni + 58Ni and 48Ca + 238U systems, which are known to display fusion hindrance phenomena. The results of the application of the nucleus-nucleus optical potential for the fusion cross-section from the recently developed effective relativistic NN-interaction (R3Y) potential is compared with the well-known, phenomenological M3Y potential. The results obtained from our present calculation for the R3Y interaction are reasonable good as compared to the M3Y potential concerning the available experimental at barrier energies. The present analysis pursues a full microscopic studies of fusion process at low energies by taking the R3Y potential along with the relativistic mean field density instead of taking the M3Y interaction within the double folding approach.
Sodium analysis in sweeteners by neutron activation analyses technique
Authors: Medeiros I M M A , Zamboni C B , Giovanni D N S , Medeiros J A G
Published: August 2019

Evaluation of Sodium in sweeteners is important in nutritional investigations and for consumers: excessive sodium consumption is one of the major risk factors, responsible for hypertension and cardiovascular diseases. In this study, twelve brands acquired in markets of São Paulo city were analysed by Instrumental Neutron Activation Analyses technique (INAA). The aim was to verify compliance with ANVISA recommendation in relation to sodium level. The results were compared with the amounts recommended and with the tolerable intake limit (< 0.4 g/kg). The sodium concentration in sweeteners samples showed low content for most of the brands. The results shown that for the general population, it is not risk.
Study of the elemental composition of plants and extracts of medicinal plants through X-ray fluorescence
Authors: Estanagel T H P , Oliveira J M , Bonventi W , Aranha N , Chaud M V , Vila M M D C , Balcão V M , Yoshida V M H
Published: August 2019

Medicinal plant extracts are mostly used in different kinds of products in different areas, such as pharmaceutical, cosmetic, food and veterinary, being employed in different dosages and applications. It is known that the metabolism of the human body is regulated by the presence or absence of certain chemical elements. Some elements enter vital functions, such as potassium and calcium. Potassium helps in muscle contractions, especially of the heart muscle, and calcium enters as an specific element in the bone composition. Some other elements like heavy metals (As, Hg, Cd, and Pb) are highly toxic to the human body, even at quite low concentrations. Therefore, there is the need to investigate the chemical composition of plants and medicinal extracts, because the presence of some elements in levels concentrations, as well as the deficiency of others, can lead to a series of metabolic disorders in the human body. The main objective of this study was to evaluate the chemical composition of plants and extracts of medicinal plants, using the Energy Dispersive X-Ray Fluoresce (EDXRF) technique, to assessing the chemical composition of plants and extracts. The qualitative and quantitative chemical elements investigated in the plants and extracts were: As, Cr, Cu, Fe, Ni, Zn, Si, P, S, Cl, K, Ca, Ti, V, Mn, Co, Rb, Zr, Cd, Sn, Ba, Hg, Pb, Bi, Mo, Pd, and Pt.
Confinement effects from a PNJL model at zero temperature regime
Authors: Mattos O A , Lourenço O , Frederico T
Published: August 2019

The Polyakov-Nambu-Jona-Lasinio (PNJL) model is a model that incorporates confinement effects in the Nambu-Jona-Lasinio (NJL) model through the addition of the Polyakov loop (Φ). These effects are studied at finite temperature regime. However, at zero temperature its modified Fermi-Dirac distributions become step functions and Φ disappears from the equations of state (EOS), as well as the Polyakov potential, leading the model to the conventional form of the NJL model. In this work we propose a variation of the PNJL model where all the couplings depend on Φ with the constraint that the interactions vanish at the deconfinement phase where Φ reaches its maximum value and the quarks behave as free particles. In this approach, coupling constants of original PNJL model become now dependent on Φ. As a consequence, all equations of state present a dependence even at zero temperature regime. The thermodynamics of this new model is discussed.
Geometry and multiplicity in high energy collisions of d-Au
Authors: Gonçalves K J C , Torrieri D G , de Souza R A
Published: August 2019

In characterizing the strongly coupled QCD system produced in nuclear collisions an important uncertainity is the initial state, in particular the role of nuclear and subnuclear scale fluctuations in small systems. In this regard, the d-Au collision is a potentially unique probe since the deuterium nucleus contains only two nuclei, allowing potentially to separate nucleonic and sub-nucleonic dynamics from multiplicity cuts. We investigate this possibility via the PHOBOS Glauber Monte Carlo program. We calculate geometric quantities of the initial state of an ultra-relativistic collision between a deuterium and a gold nucleus, and systematically examine the relationship between geometry and experimental observables.
α-cluster structure in 62,64Ge described by the local potential approach
Authors: Souza M A , Miyake H , Borello-Lewin T , da Rocha C A , Frajuca C
Published: August 2019

The unstable nuclei 62Ge and 64Ge are analyzed in terms of the α + core structure applying a nuclear potential with (1 + Gaussian)×(W.S. + W.S.3) shape. The ground state bands of 62Ge and 64Ge and first negative parity band of 64Ge are calculated and compared with experimental data. The calculated 64Ge ground state band gives a good account of the experimental energies from 0+ to 8+ state. The rms intercluster separations and B(E2) transition rates are obtained for the 64Ge ground state band and a discussion is presented.
Predictions on the α-cluster structure in 104Te
Authors: Souza M A , Miyake H , Borello-Lewin T , da Rocha C A , Frajuca C
Published: August 2019

The present work analyzes the α + core structure in 104Te using the local potential model. The α + core interaction is described by a nuclear potential of (1 + Gaussian)×(W.S. + W.S.3) shape. The energy levels, total α widths and rms intercluster separations are determined for the ground state band and compared with a previous calculation which uses a double-folding potential. The two potential forms produce similar spectra between the 0+ and 14+ states. The antistretching effect is predicted for the 104Te ground state band, as is observed in previous α + core calculations in intermediate mass nuclei. An α-decay half-life T1/2,α
≈ 3 ns is predicted for 104Te in the α-decay energy Qα ≈ 5.36 MeV using an α preformation factor P = 1. The calculated T1/2,α
value is compatible with the recently reported experimental result on α-decay of 104Te.
AnalisaCAEN, a simple software suite to reduce and analyze coincidence data collected using CAEN v1724 digitizer
Authors: Zahn G S , Genezini F A , Ribeiro I
Published: August 2019

In this work a small software suite for the reduction and analysis of coincidence data collected using CAEN’s proprietary software was developed. These software check the output files for coincidences, generate a single list mode file with the coincident events, build histograms for each input, plus a time difference histogram and a 2-detector data matrix, perform time gates and allows for the subtraction of accidental coincidences, and perform energy gating on the final data matrices, generating histograms with the gated spectra. Moreover, the suite has an integrator that guides the user through all the required steps.
Francis-99 Workshop 3: Fluid structure interaction
Authors: Trivedi Chirag , Gunnar Dahlhaug Ole , Selbo Storli Pål-Tore , Kristian Nielsen Torbjørn
Published: August 2019

Francis-99 is a series of three workshops, which provides an open platform to the hydropower researchers. It gives the possibility to explore capabilities/skills on futuristic turbine design and development. Under the Francis-99 test cases, complete design and data of a Francis turbine are provided. The measurements are conducted on state-of-the-art facility at the Waterpower Laboratory, NTNU. The first workshop was organized during 15-16 December 2014, which focused on the steady state operating condition of the Francis turbine, i.e., best efficiency point, part load and high load. The second workshop was organized during 14-15 December 2016, which focused on the transient operating conditions, i.e., load variation and start-stop. The third workshop was organized during 28-29 May 2019, which focused on fluid structure interactions. In the third workshop, two test cases were provided: (1) Hydrofoil and (2) Francis turbine. The hydrofoil test case aimed to investigate fundamental research, and the turbine test case aimed to investigate applied research.

https://www.ntnu.edu/nvks/f99-third-workshop
FSI analysis of francis-99 hydrofoil employing SBES model to adequately predict vortex shedding
Authors: Čupr P , Štefan D , Habán V , Rudolf P
Published: August 2019

The added effects from the fluid on a structure submerged in water significantly affect its dynamic response. Since the hydraulic turbine runner is geometrically complex and involves complicated flow phenomena, the research on simple hydrofoil offers a unique opportunity to investigate added effects and mutual interaction of the elastic structure and vortical flow. For this purpose, the fluid structure interaction of Francis-99 hydrofoil was analysed using the Stress Blended Eddy Simulation (SBES). Advantage of this hybrid RANS-LES turbulence model over RANS models is shown by its enhanced ability to represent vortex shedding. The results of modal sensitivity analysis showed, that fillets of the fixed hydrofoil have negligible influence on the natural frequencies of the hydrofoil and therefore the simplified geometry was used. The modal analysis of fully fixed hydrofoil both in the air and submerged in water were carried out to investigate the added mass effect. Moreover, the hydrodynamic damping for various flow velocities was also investigated for the first bending mode. Overall results are complemented by sensitivity analysis of time step size and mesh for both structural and fluid domains. The results showed that the computed damping ratio above the lock-in and vortex shedding frequency at lock-in are largely underestimated. Therefore, the geometry with blunt trailing edge was additionally tested.
A Design Method of Two DOF Joint at the Base of Heavy-load Manipulator Based on Linear Driving
Authors: Dai Zongmiao , Wu Peizhang , Wang Qingyuan
Published: August 2019

In this paper, we propose a two DOF joint mechanical design scheme for heavy-load manipulator based on linear driving, the key structural parameters that directly influencing on the linear driving force is determined. Based on the multi-body kinematics and the principle of virtual work, we derive the relationship between the torque of joint space at the base of the heavy-load manipulator and the force of linear driving, then by analyzing the relationship, we obtain the design method of key structural parameters. Finally, using simulation analysis we validate this design method.
Improving the Absolute Accuracy by Online Interpolation Technique of Industrial Robots
Authors: Patel Darpan , Lienenlüke Lars , Storms Simon , Brecher Christian , Wied Johannes
Published: August 2019

This paper describes a novel method to improve the accuracy of industrial robot by calibration technique. Robot calibration is broadly classified into model-based and modeless techniques. In this paper, a modeless technique capable of interpolating the deviation along the Z-axis is defined which doesn’t consider any kinematic model, instead adapts interpolation method to compensate errors. The robot’s deviation is measured with a laser tracker and the deviation controlling parameters are calculated. The controlling parameters interpolate the deviation and with an online compensation program this deviation is compensated in real time scenario. This modeless technique is experimentally tested and it demonstrates a substantial improvement in the accuracy of the robot.
Fault Detection and Diagnosis for a Nonlinear Hydraulic Actuator
Authors: Ortiz Juan Felipe , Borrás Carlos , Sepulveda Diego
Published: August 2019

In this work a nonlinear dynamic and mathematic model for the position control of a hydraulic actuator with internal leakage was developed, simulations were made and a basic PID control in order to check the actuator behaviour. An internal leakage emulator was installed bypassing the two chambers of the hydraulic cylinder. Time and position data were acquired via Quanser Q8-USB and saved for modelling and validation purposes, sinusoidal and square signals and both for four fault conditions. Data were classified through MATLAB Simulink algorithm having in consideration parity equations and residual generation, obtaining a high level of validation for the proposed model and the desired responses and fault detection, diagnosis and classification.
Research on Condition Monitoring of Key Components in wind Turbine based on Cointegration Analysis
Authors: Sun Xide , Xue Dong , Li Runfei , Li Xiaogang , Cui Liye , Zhang Xishan , Wu Wei
Published: August 2019

Traditional models based on temperature trend can not comprehensively monitor the condition of wind turbine, besides, the threshold obtained from model can cause fluctuation when wind turbine operates under different conditions. In view of this, this paper presents a novel methodology based on cointegration analysis for continuously monitoring the operating conditions of wind turbine. The first step is to determine the optimal combination of parameters from normal SCADA sample data, by using the cointegration test. Then, perform the method of cointegration analysis to calculate the cointegration residuals and stationary threshold line under normal working space. When wind turbine component is operating out of the normal track, the data sample in cointegration residuals will exceed the stationary threshold line, and send the alert signals. The method is tested using SCADA data of wind turbine with known faults, the results demonstrate the proposed method can effectively monitor the abnormal state of generator and gear box, and provide the function of early warning.
A Low Cost Robotic Medical Simulator for CPR Training
Authors: Freire Fiallos A A , Rosero Plúa F M , Rea Minango S N
Published: August 2019

Medical simulators have become an important tool for teaching and developing skills in health personnel. The present work describes the design and construction of a simulator for cardiopulmonary resuscitation in adults, of intermediate fidelity, equipped with monitoring software. This device has an adult-size torso, with sensors and actuators controlled and monitored wirelessly through the user’s computer. The prototype aims to assist in the training of paramedics and first responders, due to its ability to show real-time data on the execution of the cardiopulmonary resuscitation maneuver. The simulator has been designed in a modular way so that it allows an easy assembly and change of pieces if necessary. The graphical interface gives feedback in real time on the effectiveness of the maneuver. Based on surveys carried out in trained personnel, it was confirmed that the simulator is very useful to carry out practices for which it was designed, as well as to reduce the cost of implementation by being built with materials available in the local market.
Study on a Real Time Scheduling Optimization Model for Multi-source Heterogeneous Distribution Network
Authors: Huang Hongyang , Huang Xiaoming , Lou Boliang , Ma Junchao , Lu Haiqing , Lv Wentao
Published: August 2019

Real-time scheduling for distributed power consumption can be heterogeneous distribution network problems, in this paper, an optimization model based on real-time scheduling based on the day before the scheduling model, the power supply capacity of the model based on load forecasting to make full use of distributed power and energy storage equipment, reduces in the peak period of the main power supply rely on, and the imperialist competitive algorithm based on the optimization model was solved. Through the simulation test, the power supply capacity of the real-time scheduling model can effectively utilize the distributed power and energy storage devices to reduce the peak power grid based on the running cost of distribution network is reduced by 2.59%.
Microstructure and Property of Fe-based Wear-resistant Alloy Coating Prepared by Laser Cladding on the Surface of Super High-speed Elevator Parts
Authors: Zhang Wei , Feng Qiuhong , Wang Eryi , Zheng Luyu
Published: August 2019

Aiming at the problem of poor wear-resistance of wear-resistant parts used in super high-speed elevator, the experiments of laser cladding to prepare composite coating were made. Fe-Cr-Ti-V-Mo-C powder was used as cladding material. The microstructure and property of composite coating were tested by relevant equipment. The research results show that the composite coating is made up of Cr3C2, TiC, VC, WC, Fe3C, Fe-based solid solution. The carbides present as network-like and distribute in solid solution. The average hardness of composite coating is 743 HV0.2, which is 91% higher than that of matrix. Using this technology to the surface strengthening of elevator parts, the wear resistance and service life can be greatly improved.
Structural S235 and S355 Steels – Numerical Analysis of Selected Rods Connection
Authors: Major M , Nawrot J , Major I
Published: August 2019

The paper discusses two structural steels: S235 and S355, commonly used for making steel rod structures. The numerical analysis of a selected rod connection with static load and butt connected using high strength bolts was made. Two material criteria were adopted, assuming for the first analysis S235 steel for the column and S355 for the beams, and for the second analysis, the S355 steel for both beams and the column. The numerical model prepared in this way covers the real work of the connection and is the basis for assessing the correctness of its work, i.e. maintaining safety during exploitation.
Preparation and Experimental Study of Three Element Mixed Molten Salt
Authors: Yan Quanying , Wang Chenyu , Jing Zhang , Liu Chao , Fan Qingzhu
Published: August 2019

36 kinds of mixed salts made of KCl, Na2CO3 and K2CO3 were prepared in this paper. The melting point and solidification point of the sample were studied by DSC, and the stability of the selected samples is also tested. The experimental results show that the smaller component of KCl, the smaller melting point of molten salt. The melting point of the samples which melted together was 570-580°C, and the freezing point is mainly between 550 and 570 C. The test ratio of the samples were selected from experiments was 2: 3: 5 (KCl: Na2CO3: K2CO3). The sample has a low melting point at 568.9°C and a low freezing point at 545.3°C, which can effectively avoid the blockage of piping system. The research results in this paper will provide reference and basis for the application of ternary mixed molten salt in solar energy field.
Kinetics Parameters Determination in Non-isothermal Conditions for the Decomposition Reaction of Calcium Carbonate by the True Activation Energy
Authors: Tan Guanglei , Mu Tao , Tang Dan , Wang Xiaomin
Published: August 2019

The true activation energy has been obtained by the trend extrapolation under the differential condition. The frequency factor and the reaction model can be uniquely determined by comparing the result of the model-fitting method with the true activation energy. The result is shown that, the true activation energy can be used to determine the kinetics parameters for the decomposition reaction of calcium carbonate under non-isothermal conditions.
Passivation Mechanisms of Atomic Layer-deposited AlOxFilms and AlOx/SiOxStack
Authors: Gong Lei , Zhou Chunlan , Zhu Junjie , Wang Wenjing , Ji Fangxu
Published: August 2019

A new passivation layer of AlOx/SiOxwere prepared, in which 80 nm SiOxwas prepared by spin-coating perhydropolysilazane (PHPS) and annealed at 450°C. In order to compare the passivation effect of single AlOxlayers and the SiOx/AlOxstack on silicon surface, the fixed charge (Qf) in the passivated layers and chemical passivation effect were obtained by corona charge method. Fourier transform infrared spectroscopy (FTIR) and Time-of-flight secondary ion mass spectrometry (TOF-SIMS) was used to investigate the Si-H, Si-O bonds and the hydrogen profile in the passivation layer, respectively. The result reveals that the single layer of AlOxprovides good field effect with a large amount of negative Qf. Furthermore, SiOxcapping on AlOxhave more excellent chemical passivation because of amount of H saturate the dangling bonds on the silicon surface.
Thickness-dependent Strengthening Effect of Grain Refiner Al3Zr and Al3(Zr,Sc) in Al Alloys
Authors: Li Chunmei , Jiang Xianquan , Cheng Nanpu , Chen Zhiqian , Tang Jianfeng
Published: August 2019

Grain refinement is an effective means to optimize the properties of the alloy. Al3Zr, Al3Sc and Al3(Zr,Sc) phases have attracted much attention as effective grain refiners for aluminum alloys, and their precipitation size will directly affect their interfacial strengthening effect with the matrix. In this paper, the first-principles method has been used to construct the Al/Al3Zr/Al double interface crystal model with different thicknesses of Al3Zr. The strengthening effect of the phase Al3Zr on the matrix during the precipitation growth process is described, and the optimal precipitation thickness of the strengthening phase Al3Zr is determined. By calculating the Griffith separation work and stress-strain curves of the interfaces between the refining phases with different thicknesses and the aluminum matrix, the change trend of the strengthening effect on the Al/Al3Zr/Al interface during Al3Zr precipitation growth is analyzed from the perspective of the combination of static and dynamic interface strength. Then the interfacial strengthening effect of the Sc-doped Al3(Zr,Sc) phase to Al matrix is analyzed. The electron density difference is used to analyze the interfacial bonding characteristics from the perspective of electronic bonding.
Synthesis of Poly (Butadiene –g–Styrene) Core-Shell Latex for Use in Cement Modifying
Authors: Wang Dong , Zhao Tingting , Zhao Wenjie
Published: August 2019

Polybutadiene–graft –polystyrene (PB-g -PS) latex with different ratios of polybutadiene to polystyrene were prepared via emulsion graft copolymerization method through grafting styrene onto polybutadiene latex using a redox initiator system. The PB macroradicals reacted with styrene to form graft copolymers. The effect of initiator concentration, reaction temperature, grafting monomer/polybutadiene weight ratios, and monomer dropping time on the conversion, grafting efficiency, degree of grafting, and mean particle diameter of graft copolymerization reaction were investigated. The grafting efficiency of PB-g-PS was determined by a solvent-extraction technique. Fourier transform infrared spectroscopy and nuclear magnetic resonance technique were used to confirm structure of the synthesized copolymers. Transmission election micrographs verified that the synthesized latex particles had a core –shell structure, which can be incorporated into cement as modifier.
Numerical and Analytical Comparison of Dispersion Relations of Weakly Modulated Fibonacci Sequence One-dimensional Photonic Crystals
Authors: Li Yan
Published: August 2019

The photonic band and the equifrequency surface of the weakly modulated one-dimensional Fibonacci sequence photonic crystal have been calculated by the finite difference time domain method and the analytical method, respectively, where the analytical method is based on the transfer matrix method. The results show that the equifrequency surface of the photonic crystals calculated by numerical method may lead to a completely wrong conclusion. Therefore, in the study of weakly modulated photonic crystals, the study of analytical methods is very necessary.
A Narrowband Mid-infrared Absorber with Tunable Peak Absorbance and Nearly Unchanged Peak Wavelength Using a Phase Changing Material
Authors: Ou Chunhui , Wang Jian , Hao Zhibiao , Wang Lai , Xiong Bing , Sun Changzheng , Han Yanjun , Li Hongtao , Yu Jiadong , Luo Yi
Published: August 2019

A narrowband mid-infrared (MIR) absorber with tunable peak absorbance and nearly unchanged peak wavelength is demonstrated using a phase changing material. The absorber is formed by an Au IR reflector, a SiO2 dielectric cavity and a 1D photonic crystal that consists of SiO2 and GeSbTe (GST), which is a phase-transition material and thus controls the absorbance without static power consumption. The dimension of the Au/SiO2/GST/SiO2 are optimized for high peak absorbance, high quality factor and low background absorbance. The as-fabricated absorber with amorphous GST shows the peak absorbance of 0.704 at 5.636μm, quality factor of 46.19, and background absorbance less than 0.02. Without significantly changing the absorption peak wavelength and background absorbance, the peak absorbance of the absorber can be tuned up to 4.47 dB by the phase transition of GST. Such tunable narrowband MIR absorber is a promising candidate for low-cost thermal emitter for infrared applications.
Theoretical Prediction and Experimental Research of the Thermal Properties of Fatty Acid Mixtures
Authors: Yan Quanying , Fan Qingzhu , Zhang Jing , Liu Chao , Wang Chenyu
Published: August 2019

The theoretical calculation formula was used to predict the phase transition temperature and latent heat of the binary mixtures. Phase transition temperature and latent heat were experimentally studied by differential scanning calorimeter and compared with theoretical and experimental values. It is proved that the theoretical calculation formula was feasible to predict the phase change temperature and latent heat of fatty acid mixtures. Capric acid, stearic acid, myristic acid, palmitic acid and lauric acid organic phase-change materials were mixed to prepare binary mixtures. The results showed that the experimental data of phase transition temperature and latent heat of the binary mixtures were in good agreement with the theoretical ones. The results provide a reference and basis for the theoretical prediction of phase transition temperature and latent heat of phase transition for fatty acid mixtures.