bluuebunny/crossref_metadata_2025 huggingface dataset:
Application of 99mTc-UBI 29–41 scintigraphy in knee periprosthetic infection diagnosis
Authors: Kiamanesh Zahra , Ayati Narjess , Alavi Royasadat , Gharedaghi Mohammad , Aryana Kamran
Published: June 2019

Aim In recent years, the use of total knee arthroplasty (TKA) is considered a safe and cost-effective orthopedic procedure for alleviating the chronic pain and treatment of progressive osteoarthritis. This procedure may have some complications including periprosthetic infection as the most serious and aseptic loosening as the most common one. Differentiating between these entities is important because each has a different therapeutic approach. This study was conducted to investigate the ability of 99mTC-UBI scan to distinguish septic from aseptic loosening in a painful knee prosthesis.

Methods 34 patients with painful knee prostheses were included. The 99mTC-UBI scan was done immediately after IV administration of 99mTC-UBI in early dynamic and 30-minute static images. Time-activity curve (TAC) was drawn for all patients and target to non-target ratio (T/NT) was calculated on 30-minute images. The final diagnosis was confirmed by surgical findings, microbiologic culture results or active clinical follow up.

Results Using TAC analysis, 24 99mTC-UBI scans were considered negative and 10 positive for an infectious process. Sensitivity, specificity, negative and positive predictive values were 56 %, 80 %, 83 %, and 50 %, respectively. T/NT ratio analysis on 30-minute static images demonstrated 9 positive and 25 negative patterns, with a cut off value of 1.83 for the T/NT ratio. The sensitivity, specificity, negative and positive predictive values, and accuracy of this test modality were all 100 %.

Conclusions Our findings show 99mTc-UBI scan is an excellent clinical diagnostic test for differentiating septic from aseptic loosening of the knee prostheses with perfect sensitivity and specificity. Highly accurate results were obtained only 30 minutes after injection.
Heterogeneity of Macrophages in Atherosclerosis
Authors: Stremmel Christopher , Stark Konstantin , Schulz Christian
Published: June 2019

Atherosclerosis is a prevalent inflammatory condition and a frequent cause of morbidity and mortality worldwide. Macrophages are among the key immune cells driving lesion formation in the arterial wall. They have therefore evolved as potential targets for therapeutic strategies. Understanding of the different macrophage phenotypes and functions seems to be of pivotal importance for the development of treatments to target these immune cells. This review highlights the complexity of the mononuclear phagocyte system and summarizes important features of macrophage biology contributing to atherosclerosis.
The Factors Related with Behaviors and Approaches of Mothers in Avoiding Children from Gastroenteritis
Authors: Durduran Yasemin , Kandemir Bahar , Pekcan Sevgi , Evci Reyhan
Published: June 2019

Gastrointestinal infection is an important public health problem in children and is frequently seen in developing countries due to low socioeconomic status and education levels, not obeying hygiene rules, and lack of environmental sanitation. Prevention of diarrheal diseases and raising the awareness of the mothers about diarrhea/gastroenteritis is a very important subject. The aim of this study was to evaluate the knowledge and attitude of the mothers, who attended a pediatric outpatient clinic for any reason, about the management and prevention of gastroenteritis in children.

This cross-sectional study was performed in Konya, Turkey. The study was carried out with mothers who attended the pediatric outpatient clinic of a faculty of medicine and who had a baby between 0 and 2 years of age. Surveys prepared according to the literature, were used for collecting data. Descriptive statistics, chi-square test, and independent t-test were used for data analysis. A p-value of < 0.05 was considered to be significant.

The mean age of mothers was 31.7 ± 7.2 years. Of all the mothers, 97.2% had short nails, 76.3% regularly cleaned their nails once a week, and 92.2% used soap for hand washing every time. A mean score of 8.7 ± 2.8 for a question giving 12 situations where hand washing was necessary was obtained. Of the mother's babies, 40.3% had had diarrhea at least once. In terms of giving baby water and changing feeding behavior during diarrhea/gastroenteritis, significant differences were found between mothers whose babies had diarrhea/gastroenteritis previously and those whose babies had not experienced diarrhea/gastroenteritis. 83.6% of mothers had never heard about vaccination against rotavirus.

Washing hands correctly and mothers' knowledge about proper water and food hygiene are important points in protecting children against diarrheal and gastroenteritis diseases. However, there is lack of knowledge and good practice, both in protecting children from, and managing children with, diarrhea. Thus, we believe that it would be beneficial to inform and educate mothers with little children, regularly about these issues.
An omentum-inspired 3D PEG hydrogel for identifying ECM-drivers of drug resistant ovarian cancer
Authors: Brooks Elizabeth A. , Gencoglu Maria F. , Corbett Daniel C. , Stevens Kelly R. , Peyton Shelly R.
Published: June 2019

Ovarian cancer (OvCa) is a challenging disease to treat due to poor screening techniques and late diagnosis. There is an urgent need for additional therapy options, as patients recur in 70% of cases. The limited availability of clinical treatment options could be a result of poor predictions in early stage drug screens on standard tissue culture polystyrene (TCPS). TCPS does not capture the mechanical and biochemical cues that cells experience in vivo, which can impact how cells will respond to a drug. Therefore, an in vitro model that captures some of the microenvironment features that the cells experience in vivo could provide better insights into drug responses. In this study, we formed 3D multicellular tumor spheroids (MCTS) in microwells and encapsulated them in 3D omentum-inspired hydrogels. SKOV-3 MCTS were resistant to Paclitaxel in our 3D hydrogels compared to a monolayer on TCPS. Toward clinical application, we tested cells from patients [ovarian carcinoma ascites spheroids (OCAS)] who had been treated with Paclitaxel, and drug responses predicted by using the 3D omentum-inspired hydrogels demonstrated the lack of the Paclitaxel response of these samples. Additionally, we observed the presence of collagen production around the encapsulated SKOV-3 MCTS, but not significantly on TCPS. Our results demonstrated that our 3D omentum-inspired hydrogel is an improved in vitro drug testing platform to study the OvCa drug response for patient-derived cells and helped us identify collagen 3 as a potential driver of Paclitaxel resistance in 3D.
Charging effects and anomalous resistive features of superconducting boron doped diamond films
Authors: Coleman Christopher , Bhattacharyya Somnath
Published: June 2019

Anomalous resistive peaks below the superconducting transition temperature in heavily boron doped nanocrystalline diamond films could have potential application in switching devices, however it’s exact origin is still under study. We establish a temperature dependence of this resistive phase similar to what has been reported for in Josephson junction arrays and other granular superconductors where the charge duel of the Berezinskii-Kosterlitz-Thouless (BKT) transition has been observed. Non-linear magnetic field dependence of the resistance with a temperature dependent peak feature below the critical field are also presented. Pronounced temperature dependent hysteresis in the current voltage sweeps at temperatures below the determined BKT critical point are related to pinning of charge defects. It is shown that these collective features allude to a Charge-BKT transition between charge and anti-charge analogues.
A new development in magnetic particle tracking technology and its application in a sheared dense granular flow
Authors: Tao Xingtian , Tu Xuemin , Wu Huixuan
Published: June 2019

This paper presents a new development in the magnetic particle tracking (MPT) technology that measures the translational and rotational motions of a small particle. A main advantage of MPT is that it is able to track objects in an opaque environment without using radioactive material or X-rays. In addition, it can provide information about the orientation and rotation of the object, which is difficult to obtain using other technologies. However, the reconstruction process of MPT using standard optimization approaches is very time consuming and, therefore, limits its applications. In this work, two new MPT reconstruction algorithms are examined and the results are compared with the optimization approach. The extended Kalman filter (EKF) algorithm has the same accuracy as the optimization method but is orders of magnitude faster. The speed of the sequential importance sampling approach is between those of the above two methods. The accuracy of position obtained using EKF is about 0.6%, and the uncertainty of orientation is less than 1.5°. The MPT is applied to measure a dense granular shear flow to investigate the spatial distribution of a tracer particle.
The contrasting leaf functional traits between a karst forest and a nearby non-karst forest in south-west China
Authors: Fu Pei-Li , Zhu Shi-Dan , Zhang Jiao-Lin , Finnegan Patrick M. , Jiang Yan-Juan , Lin Hua , Fan Ze-Xin , Cao Kun-Fang
Published: June 2019

Karst and non-karst forests occur in the same region in south-west China, but the soil water and mineral nutrients availability are different between the forests. Our hypothesis was that the leaves of karst trees would be better adapted to dry, nutrient-poor conditions than those of trees in a nearby non-karst forest. We compared the gas exchange, anatomical characteristics and mineral nutrient concentrations in leaves from 21 tree species in a tropical karst forest and 19 species in a nearby non-karst forest in south-west China. We found that the leaves of karst trees had higher P concentrations, photosynthetic capacity and water use efficiency, and greater adaxial and abaxial epidermis thickness than leaves of non-karst forest trees. Evergreen and deciduous trees differed more significantly in leaf functional traits in the karst forest than in the non-karst forest. The leaf palisade:spongy mesophyll thickness ratio was positively correlated with stomatal conductance and negatively correlated with photosynthetic water use efficiency in the karst forest but not in the non-karst forest. Our findings indicate that karst forest trees are more conservative in water use, whereas soil P deficiency could be a major limiting factor for the growth of non-karst forest trees.
The Russian thick journal as a discursive space of negotiation
Authors: Bollaert Charlotte
Published: June 2019

This paper sets out to investigate the crucial role played by Russian “thick journals,” also referred to as literary-artistic and socio-political monthlies, in Jean-Paul Sartre’s Russian reception during the Thaw era. To this end, the positions (Bourdieu 1983) occupied by the four thick monthlies that published Sartre’s work and/or about his work in the USSR during the Thaw are mapped. Considering the position of, and relations between, those journals sheds a different light on Sartre’s reception. It reveals how the thick journals functioned, not only as a medium for introducing Sartre, but also as a space where his reception was actively negotiated.
Language and translation practices of Spanish-language newspapers published in the U.S. borderlands between 1808 and 1930
Authors: Gasca Jiménez Laura , Álvarez Maira E. , Fernández Sylvia
Published: June 2019

This article examines the impact of the anglicizing language policies implemented after the annexation of the U.S. borderlands to the United States on language use by describing the language and translation practices of Spanish-language newspapers published in the U.S. borderlands across different sociohistorical periods from 1808 to 1930. Sixty Hispanic-American newspapers (374 issues) from 1808 to 1980 were selected for analysis. Despite aggressive anglicizing legislation that caused a societal shift of language use from Spanish into English in most borderland states after the annexation, the current study suggests that the newspapers resisted assimilation by adhering to the Spanish language in the creation of original content and in translation.
Translation in nineteenth-century periodicals
Authors: O’Connor Anne
Published: June 2019

This article argues that when considering periodicals as “carriers” of foreign texts, attention must be paid to the modalities of this form of publication, and the manner in which periodicals enable and condition access to texts. The article examines not just the transnational circuits of communication of periodicals, but also the discursive practices, the agency, and the dynamic and distinct modalities of the periodical form. The nineteenth century witnessed an unprecedented expansion of periodical publishing and this article uses the case study of a nineteenth-century periodical, theDublin University Magazine, in order to question the cultural transfers taking place, the positioning of translations within the publication, the significance of the medium of communication, and the challenges posed when studying translation in periodicals. Drawing on book history approaches, the article focuses on integrating the study of the translations within their publication context, examining how the mutable and ephemeral form of the periodical allowed for expanded textual discourses and also for widened participation in the translation enterprise.
The formulaicity of translations across EU institutional genres
Authors: Biel Łucja , Koźbiał Dariusz , Wasilewska Katarzyna
Published: June 2019

This paper explores the formulaicity of EU translations into Polish across four institutional genres (legislation, judgments, reports, websites) with reference to the corresponding EU English corpora in order to understand how the degree of formulaicity is affected by the variable of genre. Formulaicity is operationalised as lexical bundles – high-frequency multi-word sequences (Biber and Barbieri 2007). The study shows a strong correlation between formulaicity and genres, as well as multiple facets of formulaicity (e.g. tokens vs. types). Our findings generally confirm the increased aggregate formulaicity of translations as regards bundle tokens for all EU genres, except for judgments, and the increased variation of bundles (types) for all the genres at the 40 occurrences per million words (pmw) threshold, although the “micro-formulaicity” threshold yielded inconclusive results. Another finding reveals a consistently low overlap of bundles between translations and non-translations. We argue that translations develop their own formulaic profiles which are levelled out compared to EU English corpora and which minimally overlap with formulaic profiles of domestic genres.
Self-bound Bose–Fermi liquids in lower dimensions
Authors: Rakshit Debraj , Karpiuk Tomasz , Zin Paweł , Brewczyk Mirosław , Lewenstein Maciej , Gajda Mariusz
Published: June 2019

We study weakly interacting mixtures of ultracold atoms composed of bosonic and fermionic species in 2D and 1D. When interactions between particles are appropriately tuned, self-bound quantum liquids can be formed. We show that while formation of these droplets in 2D is due to the higher order correction terms contributing to the total energy and originating in quantum fluctuations, in 1D geometry the quantum fluctuations have a negligible role on formation of the self-bound systems. The leading mean-field interactions are then sufficient for droplet formation in 1D. We analyze energetic stability for 2D and 1D systems and predict values of equilibrium densities of droplets.
Night sky brightness measurement during the March 2018 Earth Hour in Yogyakarta
Authors: Sukma M , Pramudya Y , Muchlas  , Okimustava
Published: June 2019

Switching off the light for one hour is annual global event to celebrate the Earth Hour. At that time, there is also campaign to observe the night sky with minimal light pollution. Hence, during this event, it is important to measure the level of light pollution using the Sky Quality Meter (SQM) device that was directed to the zenith. The research is intended to obtain comparison of the night sky brightness (NSB) between reguler days (23th and 25th of March) and Earth Hour day (24th of March). The measurement was performed in Yogyakarta that is located in -7.798893° south and 110.364992° East using the SQM-LU device. The location is the city center where the artificial light comes from the building, advertising boards, city lights and vehicles. The data distribution analysis was performed to obtain the mode value of NSB for each day. The mode value of NSB on 23th, 24th, 25th of March 2018 are 15.5 mag/arcsec2, 14.61 mag/arcsec2 15.02 mag/arcsec2 and the mode value on the Earth Hour event is 17.4 mag/arcsec2. Hence, it can be concluded that the night sky in Yogyakarta has a high level of light pollution. By turning off the light, the light pollution can be reduced.
Spectroscopic Study of Be Star β Lyrae
Authors: Putra S P , Imaduddin I , Aprilia  , Ramadhan D G , Malasan H L , Arifyanto M I
Published: June 2019

We present the spectroscopic observation of β Lyrae, an interacting eclipsing binary, with orbital rotation period of 12.9 days, with one component known as the B-emission (Be) star. The primary star is a B6-B8II of 3 M⊙ and the secondary is a 13 M⊙ B0.5V star. The secondary star is embedded in the accretion disk produced by the infalling matter from the primary star, and this disk is estimated as the source of the emission lines. The observations were conducted at Bosscha Observatory, Lembang, Indonesia from May to August 2018, using 10” Meade LX-200R Telescope (D = 254 f/D = 9.84), equipped with a Littrow High Resolution Spectrograph (LHIRES) III, grating of 1200 grooves/mm yielding in the resolution of R∼5900, and CCD SBIG ST-402 XME camera with backfocus at 17.5 mm. Seeing during observation was estimated to be 2 arc seconds. During this period, we have obtained 15 spectra in various wavelength coverage, 4 spectra covering around λλ = 5779 – 6046 ÅÅ (typical S/N = 0.02), 1 spectrum covering around λλ = 6430.257 – 6694.434 ÅÅ (typical S/N = 0.06), and 10 spectra covering around λλ = 6487 – 6752 ÅÅ (typical S/N = 0.06). The observed spectra show Hα-emission profiles with V/R variation, He I 6678 Å with P-Cygni profiles, and He I 5876 Å with P-Cygni profiles. These variations are due to the fact that β Lyrae is a binary star system, and also it is suspected that another possible mechanism might be involved.
Employment of hyper-cycloidal oscillatory motion for finding the coefficient of rolling friction. Part 1: Theoretical model
Authors: Alaci S , Pentiuc R-D , Ciornei F C , Romanu I C , Irimescu L , Buium F
Published: June 2019

The oscillation motions of physical pendula constructed with contacts between ball and cylindrical external surfaces for materializing the theoretical frictionless pivot point were applied for determining the coefficient of rolling friction (occurring as a characteristic of the relative motion between the contacting surfaces). The condition imposed for estimation of the coefficient of rolling friction consists in the requirement that the theoretical curve and the experimental data describing the decrease of angular amplitude should superpose each other. To be mentioned that specialized software for dynamic analysis characterizes the rolling friction by the internal damping of the contacting materials instead of applying the coefficient of rolling friction between the materials.
Experimental Researches concerning the Rheology of Cutting Fluids
Authors: Radulescu I , Radulescu A V , Ramalchanov S , Yankov S , Rupetsov V S
Published: June 2019

Cutting fluids are used to reduce the negative effects of the heat and friction on both tool and work piece. The cutting fluids produce three positive effects in the process: heat removal elimination, lubrication on the chip–tool interface and chip removal. This paper proposes to study the rheological properties of four different type of cutting fluids, as function of their chemical and physical characteristics. The tests were performed using a cone and plate Brookfield viscometer, by determining the rheological parameters and the variation of the apparent viscosity with the temperature. This approach has been used to quantify the performance of the tested products and to compare products in the marketplace.
Micro-scratching tests of a lead-free solder alloy SAC 305 used in electronic industry
Authors: Petrescu A M , Stoica N A , Tudor A , Rădulescu A V , Stoica M , Chişiu G
Published: June 2019

The electronic connections need to satisfy three functionalities and those are the electrical, thermal and mechanical functionalities. The PCB (Printed Circuit Board) has the role of providing a mechanical support for an assembly of various electrical and electronical components and to connect them to obtain a functional end-product. The goal of the present paper was to identify the mechanical and tribological properties of the lead-free soldering alloy SAC 305 deposit on the copper-PCB assembly used in electronic technology. The variation of the friction coefficient for all the normal forces applied on the test samples was analyzed. The understanding of the behavior of the lead-free soldering alloy for the micro scratch test is essential for the improvement of the hole electronic system integrity.
Modular omnidirectional mobile robot with four driving and steering wheels
Authors: Tătar M O , Pecie R
Published: June 2019

In this paper the authors present a modular omnidirectional mobile robot with four driving and steering robot. The paper describes the experimental prototype, the kinematic analysis in two configurations (four driving and steering wheels configuration and synchro-drive configuration), the electronic components, the testing process of the robot and future research directions.
Double Flank Gear Roll Inspection of Spur Gears Manufactured using Fused Deposition Modeling
Authors: Rizescu C I , Ciobanu R R , Rizescu D
Published: June 2019

The paper presents an experimental study that has as main objective the evaluation of the integration capacity of the spur gears obtained by FDM in high precision mechanisms. The development of precision mechanical systems required the use of the additive layer manufacturing technology in order to manufacture the gears that have specific particularities for the applications in which gears are integrated. Take these aspects into consideration, the paper presents the results achieved by testing on a ZWP-06 machine the gears obtained by fused deposition modeling technology. Gears were obtained on an Anet A2, semiprofessional 3D printer. To obtain a superior quality of toothed wheels, both process parameters: the material properties, and the features of the 3D printer were taken into account. The results, obtained from the test, revealed the level of influence of the execution parameters of the toothed wheels by FDM on their quality. The correlation of the process parameters remains the most important aspect for obtaining components with a high accuracy class, which complies with the resistance standards under the conditions of a shorter execution time.
Modeling and simulation of a dual-axis solar tracker for PV modules
Authors: Marcu A , Alexandru C , Barbu I
Published: June 2019

The paper deals with the modeling and simulation in virtual prototyping environment of a mechatronic solar tracker used for photovoltaic systems, with the aim to increase the energetic efficiency, by maximizing the rate of incoming incident solar radiation. The solar tracker in study is an equatorial dual-axis mechanism, which allows the adjustment of the diurnal and seasonal angles of the PV module in accordance with a predefined tracking program, the actuating sources being linear actuators. The modeling and simulation of the tracking system is carried out by using the MBS (Multi-Body System) commercial software solution ADAMS (Automatic Dynamic Analysis of the Mechanical Systems).
Some aspects of quality and risk management for natural gaz meters
Authors: Ilea P E , Săvescu D , Stoica A
Published: June 2019

The following paper refers to some general aspects regarding the measurement of natural gas. There are also presented the unauthorized intervention methods in natural gas distribution system and implicitly the fraudulent consumption of natural gas. It has been proposed to identify, analyze and respond to the risks involved in the measurement process, and to create a new natural gas meter by proposing an internal procedure set to prevent and reduce as much as possible unauthorized distribution. The measuring device is capable of preventing and detecting in real time unauthorized use of the distribution system.All these actions lead to changes in the competitive management process of the trading company involved in the distribution of natural gas
Mobile Teleradiology Simulation Using Dicom Files Reader Application on Android Smartphones
Authors: Guswantoro Taat , Gideon Samuel
Published: June 2019

The rapid development of digital technology has given birth to the industrial revolution 4.0, where every line of human life cannot be separated from the existence of smartphones. The development has spread to all fields including in the field of radiology. The development of Android-based applications that are able to open Dicom files, makes it easier for doctors to analyze patients’ diseases without limited time and location. In this study mobile teleradiology simulation was carried out by sending dicom files that were archived in zip from the scanning results using mobile x-ray and DR films via email, files which were received using an android smartphone and then extracted. By activating the dicom file reader application on the smartphone an image that can be adjusted to brightness, sharpness, contrast so that it can be further analyzed by the recipient. With this simulation, it is analogous if the file sent is a scanning of a patient, and the recipient is a doctor, then the doctor can analyze the disease of the patient.
Identification The Subsurface Structures of Kadipaten Terung Site Using Surface 3D Resistivity Methods
Authors: Widodo A , Syaifuddin F , Mudhofar A , Warnana D D , Rochman J P G N , Ariyanti N , Lestari W
Published: June 2019

Measurements of the 3D resistivity method have been carried out in the Terung Site, Terung Wetan Village, Krian, Sidoarjo Regency. The study was conducted to determine the distribution pattern of the Terung Site subsurface structure. Many archaeological sites from ancient times have been buried or deliberately buried beneath the surface. The process of searching archaeological sites that have been carried out only based on the results of stories that developed in the community. The 3D resistivity method can be used as a method for conducting site searches. The 3D resistivity method gives the image of the resistivity distribution in a vertical and horizontal cross section therefore to produce a more resolutive image. Based on measurements with the 3D Wenner configuration resistivity method, there is a structured continuity of Kadipaten Terung Site in the depth of 1.5-3.5 meters with resistivity values of 30 Ωm - 80 Ωm.
Development Carbonated Hydroxyapatite Powders from Oyster Shells (Crassostrea gigas) by Sintering Time Controlling
Authors: Almukarrama  , Yusuf Yusril
Published: June 2019

Carbonated-hydroxyapatite (CHAp) is a hydroxyapatite substituted with carbonate ions and is known to resemble the hard bone structure of humans. CHAp was synthesized from biogenic material. Oyster shells (Crassostrea gigas) was biogenic materials that used as a calcium source. In addition, sodium bicarbonate and ammonium hydrogen phosphate were also used as sources of carbonate and phosphate. In this research, the oyster shells used were milled, calcined, and characterized to determine the phase changes from CaCO3 to CaO by decomposition process. CHAp powders which were synthesized by precipitation method, were sintered at 650 °C for 0.25, 0.5, 1, 2 and 4 hours. To find the quality of CHAp powders with different sintering time, characterization process using Fourier Transform Infrared Spectroscopy (FTIR), X-Ray Diffractometer (XRD), and Scanning Electron Microscope-Energy Dispersive X-Ray (SEM-EDX) has been successfully done. FTIR, XRD, and SEM-EDX was used to determine functional groups, to confirm the presence of carbonate groups, to analyse the crystallography, and to calculate the Ca/P molar ratio and carbonate content of CHAp powders. Based on the results of characterization process showed that the oyster shells weres successfully synthesized into CHAp and the length of sintering time effects of the crystallite size and crystallinities. CHAp powders sintered for 4 h have 41.385 % and 31.499 nm degree of crystallinity and crystallite size, respectively.
Fiber Content and Relative Feed Value Estimation of Gamma Irradiated Rice Straw
Authors: Firsoni  , Wahyu Hardani Shintia Nugrahini , Wahyono Teguh
Published: June 2019

Ionizing irradiation is an alternative treatment to reduce the cell wall constituents and improve the nutritional value of substrates. The purpose of this research was to evaluate the fiber content and relative feed value of rice straw after gamma irradiation treatment. Rice straw was obtained from Sidenuk rice variety. Two polyethylene packages of samples were irradiated in Iradiator Karet Alam (IRKA), Indonesia at doses of 5 and 10 kGy in the presence of air. Treatments includes untreated/unirradiated, 5 kGy and 10 kGy irradiated rice straw. The observed parameters were neutral detergent fiber (NDF), acid detergent fiber (ADF), dry matter digestibility (DMD), dry matter intake (DMI) and relative feed value (RFV) estimation. The change of fiber content was also qualitatively observed by Fourier Transform Mid-Infrared (FTIR). This research was arranged into a completely randomized block design with five replications. The results showed that there was no difference in NDF and ADF content between all treatments. There was also no difference in RFV due to the results of NDF and ADF measurements. Interestengly, there was a strong absorption with a wide and strong band centred at 3331 cm−1 (O-H stretch) only observed in the untreated sample. Meanwhile, a peak signal was observed at 1722 cm−1 only in 5 kGy and 10 kGy irradiated rice straw spectra. This could affect in the increased of hemicellulose compounds after irradiated treatments. It can be concluded that gamma irradiation treatment at doses of 5 and 10 kGy has not been able to influence the fiber content and relative feed value of rice straw. However, there was a tendency for hemicellulose compounds increasingly due to irradiation treatment.
The Role of DC Biased Plasma Treatment of Polystyrene on the Formation of the C≡N Functional Group Controlling Its Hydrophobicity
Authors: Hanif Mahardika A. , Masruroh  , Santjojo Dionysius J. D. H.
Published: June 2019

Nitrogen plasma treatment was carried out to modify the surface of polystyrene film deposited on a quartz crystal microbalance (QCM) sensor. The modification was intended to enhance the wettability of the film by inducing the formation of CN functional group on its surface. This work investigated the effect of DC bias controlling N* in the plasma on the effectiveness of the nitrogen plasma treatment. The polystyrene was deposited by a spin coating method on the surface of a quartz crystal normally used in an electronic resonator. The nitrogen plasma was generated in an aluminium vacuum chamber using a 2 MHz radio frequency (RF) generator. The vacuum pressure and the gas flow rate were kept constant during the experiments. The plasma character in the chamber was controlled by applying a DC bias between the RF electrodes and the sample stage. The DC voltage was varied from 100 to 500 volts at 100 volts’ step, while maintaining the RF voltage constant. During the process, the species in the plasma was characterized using an optical emission spectroscopy (OES). The wettability of the treated samples was tested using a contact angle measurement system. FTIR measurement was utilized to study the polar functional groups on the surface of the polystyrene before and after the treatment. The OES identified the existence of N radical (N*). The reduced intensity of emission line of the N* increased with the increase of the DC voltage. However, a small decrease was also evidence at DC voltage higher than 400 volts. The decrease of the line intensity was directly related to the decrease of the contact angle (CA < 40°). The relation of the N* and the resulted wettability is related to the polar functional group of the C≡N bond found in the treated polystyrene’s surface.
Synthesis temperature and NaOH concentration dependences of microstructure and magnetic properties of MnNi-Fe2O4 nanoparticles
Authors: Saputra A I , Herdiman  , Suharyadi E , Kato T , Iwata S
Published: June 2019

MnNi-Fe2O4 nanoparticles have been successfully synthesized by coprecipitation method in different synthesis temperatures and NaOH concentrations. Microstructure and magnetic properties of nanoparticles were characterized by X-ray diffractometer (XRD), transmission electron microscope (TEM), fourier transform infra-red (FTIR) spectroscope, and vibrating sample magnetometer (VSM). X-ray diffraction patterns confirmed the formation of spinel structure with crystallite size in the range of 7.5 nm to 14.0 nm. The spectral analysis revealed two characteristic absorption bands related to metal-oxygen vibration in tetrahedral and octahedral site that appeared at 586 cm−1 and 432 cm−1, respectively. The magnetization saturation within the range of 3.0-8.1 emu g−1. The tendency to increase in coercivity from 6.5 to 17.5 Oe was due to the increase in synthesis temperature. The increase in NaOH concentration also affected coercivity to increase from 12.3 to 84.9 Oe.
Experimental Analysis on The Tensile Strength of Polyester Resin based Calcium Carbonate Powder and E-Glass Fibre Reinforced Composite
Authors: Wicaksono S T , Ardhyananta Hosta , Waluyo M B
Published: June 2019

Calcium carbonate powder is contained in the waste produced from processing limestone. Limestone is used as an alternative substitute for organic fillers in polymer composites. The use of this waste can be a valuable resource as a replacement filler in polymer composites. The main purpose of this study is to reuse the waste materials calcium carbonate for composite materials. E-glass type woven roving is used as reinforcement and polyester resin was is as a matrix. In the present research, the addition of calcium carbonate waste powder in composites E-glass/polyester was investigated for tensile strength and density. In the hybrid, composite specimen of this study was prepared using hand lay-up technique. Tensile testing was carried out according to ASTM D368 standard. At first, calcium carbonate powder, glass fibre, and polyester were prepared in a specific volume and the specimens were prepared. Comparison filler plays an important role in producing the tensile strength of the composite. Thus, the fill ratio was considered as an experimental variable and were varied (2.5, 5.0, 7.5, and 10% by weight for calcium carbonate; 10, 12.5, 15, and 17.5% by weight for E-Glass. After testing was carried out, it is found that the strength of the material was increased as the volume of E-glass fibre increased.
The rule of radius averaging in hydrogen atom
Authors: Abdurrouf
Published: June 2019

According to quantum mechanics, electrons do not have a fixed position in an atom, and therefore orbitals have no definite radii. However, electrons have characteristic wave functions from which the radius of their orbits can be calculated or averaged. Depending on the average method, there are three most popular expressions for orbital radius, namely the average radius, the root mean square (rms) radius, and the most probable radius. Unfortunately, for hydrogen atom, none of those three radii is equal to the classical radius, even for large principal quantum numbers called the classical regime. Here, by using energy analysis, we propose a harmonic radius and show that the results well agree with the classical radius for each principal and orbital quantum numbers.
Forecasting Foreign Tourist Using Intervention Analysis On Count Time Series
Authors: Atmanegara Eviyana , Suhartono  , Atok RM
Published: June 2019

The foreign tourist’s data are count time series data that contains the discrete value. Poisson autoregressive (AR) and Negative Binomial AR are time series models used for forecasting count data. The number of foreign tourist arrivals is influenced by the series of inputs called interventions, such as the existence of bomb terror and tourism promotion. This research aims to forecast the number of foreign tourists visiting Indonesia by nationality, 2019. The number of tourist arrivals from Bahrain and Singapore represents low count data and high count data, respectively. This work employs intervention analysis on count time series model and intervention analysis on ARIMA. Intervention on Poisson AR is the best model for forecasting the number of tourist arrivals from Bahrain and Singapore to Indonesia, 2019.
Convert Probability Network to Artificial Neural Network based on Position, Time and Speed of Events
Authors: Cholissodin Imam , Marji
Published: June 2019

Building a probability function to get the best answer between events in many review problems is a very complex one. In this study, several events were given as a case study to find a solution, after which an analysis will be carried out when and where the event contained position and time features. So that the distance factor, travel time factor and speed factor for each event can be calculated. Then a concept comparison between Probability Network from the Bayes Theorem versus Artificial Neural Network (ANN) was made, accompanied by a review of the Propositional Logic (PL) or First Order Logic (FOL) concept compared to using the Uncertainty concept in calculating the probability of an eventin a pseudo event that has often been ignored because it is considered to have no influence and the probability is small whereas it can be the opposite. In fact, sometimes, the pseudo event is the main factor determining the real event and the probability is much greater than expected. In addition, we also give an Engineering Events Theorem that can intentionally set event-by-event syntheses to increase the probability of an event which is initially smaller than the probability of another event. After being given an injection/dummy/synthesis event, however, then the initially small probability of the event becomes very high and the time of occurrence can be accelerated or decelerated, or even minimized so that it does not occur.
Geographically Weighted Bivariate Gamma Regression in The Analysis of Maternal Mortality Rate and Infant Mortality Rate in North Sumatra Province 2017
Authors: Dewi Diah Kusuma , Purhadi  , Sutikno
Published: June 2019

In this study, Geographically Weighted Bivariate Gamma Regression (GWBGR) model is proposed. This GWBGR model is a developer of the Bivariate Gamma Regression (BGR) model which all of the regression parameters depend on the geographical location, i.e latitude, and longitude. In these models, the response variables are correlated and follow the gamma distribution. We applied the GWBGR model to analyze Maternal Mortality Rate (MMR) and Infant Mortality Rate (IMR) in North Sumatra Province 2017. The result shows that the test of heterogeneity spatial is significant, it means MMR and IMR in North Sumatra Province depend on the geographical location. Modelling with BGR produced 6 groups based on significant variable similarities to MMR and 3 groups based on significant similarity of variables towards IMR. Based on AICc, GWBGR model is smallest than BGR model. Finally, we conclude that the GWBGR model was better than the BGR Model (global model).
Generalized Linier Autoregressive Moving Average (GLARMA) Negative Binomial Regression Models with Metropolis Hasting Algorithm
Authors: Febritasari Popy , Surya Wardhani Ni Wayan , Sa’adah Ummu
Published: June 2019

This paper discusses regression models when the variance in count data is not equal to the mean. It happens in mortality cause of traffic accident data in jurisdiction’s territory of Dharmasraya’s Police Resort, where the variance is larger than the mean, which is called overdispersion. In this case we used negative binomial regression in time series with generalized linier autoregressive moving average (GLARMA) models. The parameters were estimated using maximum likelihood estimation (MLE) method and metropolis hasting algorithm at 100thburn - in period and 150000 iteration. The prior distribution and the number of iteration in metropolis hasting algorithm had less Mean Square Error (MSE) than MLE method. Prediction for next period using model metropolis hasting algorithm.
Modeling of Exclusive Breastfeeding and Mother Working Status with Recursive Bivariate Probit Model (Case Study in Surabaya City 2017)
Authors: Isnaini Fadhila , Ratnasari Vita , Mashuri Muhammad
Published: June 2019

There are special cases in Bivariate Probit model where one dependent variable becomes the regressor endogenous variable for the other dependent variable. Therefore, recursive bivariate model is used to solve this case. Exclusive breastfeeding is measured to identify its characteristics so that policies can be formulated to increase the rate of exclusive breastfeeding. The variable of mother working status is endogenous. Therefore, a recursive model is used to model this case. Mother’s working status affects mother’s exclusive breastfeeding. Mothers who do not work increase the chances of a mother being able to give exclusive breastfeeding. The greater the age of the first pregnancy of the mother, the less the chances of mothers to not work. A mother with more child has more chance to not working. A medium number of family member affect a chance for a mother to working. A mother who has last education at the Elementary School has a high chance of exclusively breastfeeding their babies. This may be related to the ability of mothers to work with mother’s education. Early Initiation of Breastfeeding (EIB) affects the opportunity for mothers to exclusively breastfeed. It proves the importance of EIB shortly after the baby is born so that the baby does not confuse the nipple and the breastfeeding process becomes easy. A husband who has last education at Senior High School give a greater chance for the mother to exclusively breastfeed. Recursive Bivariate Probit models have smaller AIC values than Bivariate Probits, which are 522.226 and 526.414. This shows that the Recursive Bivariate Probit model is better at modeling cases of exclusive breastfeeding and the status of working mothers in Surabaya city than Bivariate Probit Model.
Possibilistics C-Means (PCM) Algorithm for the Hepatocellular Carcinoma (HCC) Classification
Authors: Khairi Rafiqatul , Rustam Zuherman , Utama Suarsih
Published: June 2019

Hepatocellular Carcinoma (HCC) is a malignant tumor that attacks the liver and can cause death. Although there have been advances in technology for the prevention, diagnosis, and treatment, the number of liver cancer patients is still increasing. The liver can still function normally even if some of its parts are not in good condition. Therefore, the symptoms of liver cancer at an early stage are difficult to detect. Early diagnosis of this disease will increase the chances of recovery. One method to diagnose Hepatocellular Carcinoma (HCC) is to check the level of alpha-fetoprotein (AFP) in the blood which is alpha-fetoprotein (AFP) is a cancer index. If the liver cancer cells continue to grow, the level of alpha-fetoprotein (AFP) will be very high. This paper presents a Possibilistic C-Means (PCM) algorithm, which used to classify the results of alpha-fetoprotein (AFP) blood tests to determine whether patients diagnosed with Hepatocellular Carcinoma (HCC) or normal patients. This method will help to get an accuracy of about 92%.
Summarizing Netizens’ Sentiments Towards the 1stIndonesian Presidential Debate using Lexicon Sentiment Analysis
Authors: Lestari Ariesta , Karolita Devi
Published: June 2019

Twitter is one of the popular social media platforms in Indonesia. This platform has been used as a media communication and public engagement tool for many purposes, especially in political and governance domains. During the process of 2019 Indonesian Presidential Election, many people use Twitter to express their opinion/sentiment towards the election process. In this paper, we investigate the nature of people’s opinion towards the Indonesian Presidential Election after the 1st debate. The goal of this study is to perform exploratory sentiment based analysis of Twitter data, and that was gathered after the 1st debate. We used lexicon sentiment analysis to calculate the sentiment of political tweets collected after the 1st debate. The identification of positive and negative opinion was automatically conducted using the available dictionary. Our result shows that sentiment of the netizen towards the 1st Presidential debate was mostly negative. In addition to this result, a predictive model was generated using CART and logistic regression to predict the netizens’ sentiment. This experiment shows that the accuracy of the prediction model reaches 90%. Therefore, our study suggests that Twitter data can be used to analyse citizens’ sentiment toward the Indonesian Presidential Debate and can generate a model to predict citizens’ future sentiment toward the next debate.
Survival Analysis of Un-identical Recurrence Using Conditional I, Conditional II, and Marginal Method
Authors: Kusthika Putri Dita Ramadayanti , Sa’adah Umu , Efendi Achmad
Published: June 2019

Survival analysis can be used to examine events that may occur more than once in one individual or is called a recurring event. This event can be seen in cases of stroke recurrence. The occurred recurrence shows a more severe recurrence stage than before (recurring events are not identical). The Stratified Cox model with Conditional I, Conditional II, and Marginal methods can be used to analyse recurring events, especially in recurrent events that are not identical. The used data are secondary data from the medical record archives of stroke patients at Chasbullah Abdulmadjid Hospital Bekasi City from March 1, 2016 to April 30, 2016. Based on the Wald test and the backward elimination steps, we found two explanatory variables that influence the recurrence rate of stroke which were hypertension and hypercholesterolemia. The model from the three methods is a model with a combination of variables of hypertension and hypercholesterolemia. Patients suffering from hypertension or hypercholesterolemia have the potential to experience a recurrence of stroke compared to patients who do not have hypertension or hypercholesterolemia. Based on the AIC value of each method, the best method for recurring data on stroke patients is the Conditional I method.
Learning Vector Quantization for Diabetes Data Classification with Chi-Square Feature Selection
Authors: Putri Nadisa Karina , Rustam Zuherman , Sarwinda Devvi
Published: June 2019

Diabetes mellitus or commonly referred as diabetes is a metabolic disorder caused by high blood sugar level and the pancreas does not produce insulin effectively. Diabetes can lead to relentless disease such as blindness, kidney failure, and heart attacks. Early detection is needed in order for the patients to prevent the disease being more severe. According to the non-normality and huge dataset in medical data, some researchers use classification methods to predict symptoms or diagnose patients. In this study, Learning Vector Quantization (LVQ) is used to classify the diabetes dataset with Chi-Square for feature selection. The result of the experiment shows that the best accuracy is achieved at 80% and 90% of the data training and the performance measurement, which are precision, recall, and f1 score are the highest when the model contains all the features in the dataset.