bluuebunny/crossref_metadata_2025 huggingface dataset:
Genetic Optimization of LDPC Codes to Improve the Correction of Burst Errors
Authors: Broulím Jan , Ayriyan Alexander , Grigorian Hovik
Published: January 2020

Error correction plays a crucial role when transmitting data from the source to the destination through a noisy channel. It has found many applications in television broadcasting services, data transmission in radiation harsh environment (e. g. space probes or physical experiments) or memory storages influenced by Single Event Effects (SEE). Low Density Parity Check (LDPC) codes provide an important technique to correct these errors.

The parameters of error correction depend both on the decoding algorithm and on the LDPC code given by the parity-check matrix. Therefore, a particular design of the paritycheck matrix is necessary. Moreover, with the development of high performance computing, the application of genetic optimization algorithms to design the parity-check matrices has been enabled.

In this article, we present the application of the genetic optimization algorithm to produce error correcting codes with special properties, especially the burst types of errors. The results show the bounds of correction capabilities for various code lengths and various redundancies of LDPC codes. This is particularly useful when designing systems under the influence of noise combined with the application of the error correction codes.
KANTBP 4M Program for Solving the Scattering Problem for a System of Ordinary Second-Order Differential Equations
Authors: Chuluunbaatar Galmandakh , Gusev Alexander A. , Chuluunbaatar Ochbadrakh , Vinitsky Sergue I. , Le Hai Luong
Published: January 2020

We report an upgrade of the program KANTBP 4M implemented in the computer algebra system MAPLE for solving, with a given accuracy, the multichannel scattering problem, which is reduced to a boundary-value problem for a system of ordinary differential equations of the second order with continuous or piecewise continuous real or complex-valued coeffcients. The solution over a finite interval is subject to mixed homogeneous boundary conditions: Dirichlet and/or Neumann, and/or of the third kind. The discretization of the boundary problem is implemented by means of the finite element method with the Lagrange or Hermite interpolation polynomials. The effciency of the proposed algorithm is demonstrated by solving a multichannel scattering problem with coupling of channels in both the reaction region and the asymptotic one.
An Approach to the Estimation of Dimensions from Static Images
Authors: Jakab František , Kainz Ondrej , Michalko Miroslav , Petija Rastislav
Published: January 2020

The broad goal of this study is the estimation of dimensions of real-world multidimensional objects. The focus is on the human being and its dimensional parameters, primarily the height. The approach to the estimation of the height in a single camera environment is presented and is experimentally verified. The proposed method presumes that the distance from the optical device to the human body and its Vertical Field of View (VFOV) are known. The VFOV has to be calculated or acquired only once for a specific device. The accuracy of the proposed method is validated by a series of test scenarios including, e.g., statistical height measurements.
Development of the Geometry Database for the BM@N Experiment of the NICA Project
Authors: Akishina Elena , Alexandrov Evgeny , Alexandrov Igor , Filozova Irina , Gertsenberger Konstantin , Ivanov Victor , Priakhina Daria , Shestakova Galina
Published: January 2020

The article is dedicated to the current state of the Geometry Database for the BM@N experiment of the NICA project. The main goal of the database is to provide a central storage of the BM@N geometries, convenient tools for managing its geometry modules, various software assembling versions of the BM@N setup as a combination of modules and additional files providing support for a set of versions. Both the Graphical User Interface (GUI) and the Application Programming Interface (API) have been developed.
Development of the BM@N Web Monitoring
Authors: Gabdrakhmanov Ilnur R. , Merts Sergei P.
Published: January 2020

The BM@N experiment is a fixed target experiment and the first stage of the NICA project. Its development is of great importance for the NICA experiment as a whole. In order to effectively conduct the experiment, a convenient and unified monitoring tool is needed. The monitoring system backend is based on the FairRoot package while its frontend uses the CERN jsROOT library. The user is able to monitor any detector subsystem, select specific detector station, plane, time or strip profile histograms in 1/2/3D view. The QA functions currently are presented by reference run auto-selecting and consequent overlaying histograms.
Software Development for the BM@N Experiment at NICA: Challenges and Status
Authors: Gertsenberger Konstantin , Merts Sergey , Gabdrakhmanov Ilnur , Filozova Irina , Alexandrov Igor , Alexandrov Evgeny , Moshkin Andrey , Chebotov Alexander
Published: January 2020

A new generation of experiments on relativistic nuclear physics is planned to be started in the nearest years at the Nuclotron-based Ion Collider facility (NICA) under construction at the Joint Institute for Nuclear Research in Dubna. The fixed target experiment BM@N (Baryonic Matter at Nuclotron) is considered as a first stage towards the implementation of the physics program available at NICA. For a successful accomplishment of the BM@N physics program, a well-developed and tested software package for simulation, digitization, reconstruction and analysis of collision events and other supporting tasks is of utmost importance. The data flow scheme of the experiment is shown. Offine and online software systems, such as the main BmnRoot framework, databases of the experiment, data monitoring and others providing information support for the experiment are presented. The implementation of the software systems is a necessary stage for the successful operation of the BM@N experiment.
CORSIKA Based Simulations of Background in Baikal Experiment
Authors: Pastirčák Blahoslav
Published: January 2020

The Baikal experiment aims to register cosmological neutrinos and map the high-energy neutrino sky in the Southern Hemisphere including the region of the Galactic Center. It will use a km3-scale high-energy neutrino telescope located in the southern basin of the Lake Baikal. The northern location of the detector site allows direct observation of the Galactic Center in more than 75 % of the astronomical time. The selection of events from neutrino induced upward going muons, suggests a fairly reliable estimation of the expected background from atmospheric muons. The procedure for simulating background events from atmospheric muons in an array is performed in several steps. The CORSIKA 7.64 was used to simulate the flux of atmospheric muons at the sea level with appropriate chemical composition of the primary cosmic rays. The muon propagation through water and rock to the array level was then simulated with the MUM code. As the last step of the simulation chain, the detector response to the Cherenkov radiation of muons was estimated by taking into account the features of the array measuring systems was performed. The main features of the CORSIKA Monte Carlo code and the next steps of the simulation chain are summarized. The physical models embedded in CORSIKA are described. Application of the full simulation chain is demonstrated.
Nonparametric Tests for Purity of Low Statistics Data
Authors: Zlokazov Victor B.
Published: January 2020

The nonparametric methods are most suitable for tasks facing the uncertainty or complexity of models and the small statistics of the analyzed data. They are irreplaceable in those cases when high tempo of the analysis is required.
Anatomical study of sacral hiatus in South Indian population and its clinical significance in caudal epidural anaesthesia
Authors: Anupriya A. , Sophia M. Mahima
Published: January 2020

Background: Caudal anaesthesia is administered into the epidural space through Sacral Hiatus(SH). Hence reliability and success of caudal epidural anaesthesia depends upon the anatomical knowledge of sacral hiatus. Aim: The aim is to study the morphological measurements and variations of structures around the sacral hiatus and to identify possible anatomical reasons for failure of caudal epidural anaesthesia (CEA). Materials and methods: Fifty three dry adult sacral bones of both sexes were measured using Vernier Caliper, scale and divider. The shape of sacral hiatus (SH) was observed and its length and breadth were measured. The measurements were focused on sacral hiatus and its relation with surrounding bony projections. Results: The shape of the sacral hiatus showed a maximum occurrence of inverted 'V' and 'U' shapes with 35.85% and 26.42% respectively. The level of apex of SH was maximum at S4 foramen level in 68.63% cases followed by S5 and S3 level. In 62.26%, the level of base was observed at S5 level . The average length of the sacral hiatus was 23.02(± 8.95 mm), APdiameter was 5.49 (±l.44 mm) and base of SH was 14.6 (± 3.99 mm). The distance from apex and base of SH to S2 foramen level was 31.07 mm and 52.86 mm respectively. Conclusion: The anatomical knowledge of SH is very much necessary to increase the reliability and success of CEA. Surrounding bony irregularity, different shapes of hiatus and defect in dorsal wall of sacral canal should be taken into consideration before undertaking CEA so as to avoid its failure.
Jejuno-jejunal intussusception in an adult - a cadaveric case report
Authors: Iqbal S.
Published: January 2020

lntussusception is rare in adults. It accounts for 5 to 10% of all intussusceptions and 1 % of all bowel obstructions. It has a definite lead point in the form of either a lesion in the bowel wall or intraluminal, which alters the normal peristalsis and may lead to an invagination. It may present as an acute, intermittent or chronic problem and thus making its pre-operative diagnosis difficult. The symptoms are usually those of bowel obstructions which include nausea, vomiting, abdominal pain with or without melena and it depends on the causative lesions. Ultrasound and CT scans are the two most important radiological methods used in the diagnosis of intussusceptions. Surgical resection of the intussuscepted mass without reduction and end to end anastomosis is the preferred line of treatment in adults, because most of the enteric intussusceptions are associated with malignancy. In this report, we present a case of jejuno - jejunal intussusception in a dissection hall cadaver and analyze its incidence, etio-pathogenesis, classification, symptomatology, importance of imaging studies in the diagnosis and the therapeutic interventions in detail.
Non syndromic congenital malformations - a DNA study using comet assay
Authors: Swer Rijied Thompson , Datta Dyutimoy , D'Silva Mary Hydrina
Published: January 2020

Background and Objectives: The role of genomic instability resulting from chromosomal aberrations, gene mutations due to deletions, translocations and single gene defects is a known phenomenon leading to DNA damage. A deficient repair process is also attributed to the perpetuation of this damage. Placental insufficiency in pregnancy during late embryonic or early fetal period resulting in DNA damage gives rise to malformed phenotypes. An attempt was made to study the extent of DNA damage in non syndromic congenital malformations. Materials and Methods: A total of 20 children were studied. 10 of them, between 10 days to 5 years of age, presenting with non syndromic congenital anomalies formed the cases. An equal number of children matched for age criteria formed the controls. Lymphocytes collected from peripheral blood of these children were subjected to the standard comet assay, an highly sensitive, reliable, relatively inexpensive and reproducible single cell layer electrophoretic technique, where damaged DNA migrates out of the cell towards the anode forming a comet. The length of the tail is a measure of the DNA damage. Results: The malformations observed were those of urogenital, craniofacial and nervous systems. The mean comet tail lengths were 24.744 μm, 20.649 μm and 27.402 μm respectively. Comparing this to the mean tail length in controls with 1.992 μm, there was high statistical significance (P value <0.0001). Conclusion: Gene mutations, particularly involving Sex Region Determining (SRD) genes and Superoxide Dismutase (SOD) enzyme imbalances, have been implicated in these congenital malformations. Thus the comets seen in this study reflect the DNA damage due to the gene defects.
Transverse gallbladder: a case report
Authors: Medhi Shobhana , Baruah Anuradha , Kusre Giriraj
Published: January 2020

Ectopic gallbladder or anomalous position of the gallbladder is a rare congenital anomaly. Knowledge and awareness of this anomaly is important as it may predispose to various gallbladder diseases and may lead to diagnostic confusion. Here we present a case of a rare variant of ectopic gallbladder - transverse or horizontal position of the gallbladder in a still born male fetus observed during routine fetal autopsy.
Esthetic Perception of Various Forms of Anterior Diastemas during Smiling
Authors: Singla Divya , Stan Neha , Mittal Sanjay , Bhullar Mandeep , Aggarwal Isha , Hassan Rameez
Published: January 2020

Introduction Midline diastema is a common esthetic problem in mixed and permanent dentition. It is considered attractive in some cultures and unattractive in others.

Aim The aim of this study is to compare the perceptions of anterior diastema by dental students and laypersons.

Materials and Methods The study was conducted on 100 undergraduate students of Bhojia Dental College (n = 50) and Bhojia Nursing College (n = 50), Himachal Pradesh, India. A self-prepared questionnaire was given, which consisted of two parts: first part had personal details (name, age, sex, knowledge of diastema) and the second part contained an edited photograph of a patient who had reported to the Department of Orthodontics, Bhojia Dental College, with the chief complaint of midline diastema. The photographs were modified by photoediting software and arranged according to the previous studies on anterior diastema by Frush and Fisher, Lombardi, and Simian. A visual analog scale with scores 1–4 (1, most attractive; 2, attractive; 3, less attractive; 4, least attractive) was used to rank these photographs by the students. Comparison between various variables was made by using chi-squared test.

Results Smile attractiveness from the most to the least attractive was Simian > Frush and Fisher > Lombardi > midline diastema among both dental and nursing students. Gender and presence of diastema had no relation with the students’ perceptions (p > 0.05).

Conclusion The location and width of diastema had an important role in the perception of dental diastemas. Midline diastema was a gap with most negative perception.
Prosthetic Rehabilitation of Amputated Fingers Using Thimble Prosthesis: A Novel Methodology
Authors: Dewan Sumedha , Kalra Tarun , Kumar Manjit , Bansal Ajay
Published: January 2020

Any kind of deformity or injury to the finger or hand is one of the most encountered type of injuries, which may cause psychological and emotional disturbance to the patient. The prosthetic rehabilitation of the amputed part of the finger supports the patient emotionally as well as physically and also has a role in making the patient socially more acceptable. This case report highlights on a simple technique for fabricating a thimble prosthesis using silicone elastomers.
Climate crisis, health equity, and democratic governance: the need to act together
Authors: Krieger Nancy
Published: January 2020

On Friday, 20 September 2019, over 4 million people worldwide participated in the youth-led Global Climate Strike. Emphasizing the dire impacts of the climate crisis on people’s health, planetary health, and health equity, participants called for politicians and those with power to listen to the scientists and to the evidence. But who are these politicians and what is the evidence regarding to whom they listen? In the United States (US), critical research documents how the public’s will is being subverted—and people and planetary health are being harmed—via changes to the ‘rules of the game’ that affect democratic governance. Health professionals, organizations, and institutions should encourage civic engagement—for themselves, their staff, members, and study participants—regarding: voter registration; being counted in the 2020 Census; countering partisan gerrymandering; and helping to build strong coalitions addressing profound links between climate change, health equity, and democratic governance.
Studying thermal conductivity after irradiation
Authors: Patrick Chris
Published: January 2020

Time-domain thermoreflectance reveals two distinct regions of thermal conductivity degradation in sapphire after irradiation with swift heavy ions.
Hawkmoths of Australia
Authors: Moulds Maxwell , Tuttle James , Lane David
Published: January 2020

Hawkmoths are large charismatic insects with highly variable and colourful larvae. Some species are specialised in their habitat preferences, but others are widespread and often encountered in gardens. However, little is known about most species, and associating the adults with their larvae has previously been difficult or impossible.
Hawkmoths of Australia allows identification of all of the Australian hawkmoths for the first time and treats species found on mainland Australia, Tasmania and all offshore islands within Australian limits. It presents previously undescribed life histories of nearly all species and provides a comprehensive account of hawkmoth biology, including new parasitoids and their hawkmoth hosts. Detailed drawings and photographs show the external and internal morphology of adults and immatures, and eggs, larval instars and pupa. Keys are provided for last instar larvae and pupae of the 71 species that the authors have reared. The book is concluded by a glossary, appendices to parasitoids and larval foodplants, an extensive reference list with bibliographical notes and a comprehensive index.
The wealth of new information in this book makes it an essential reference for anyone interested in these moths.
Hawkmoths of Australia is Volume 13 of the Monographs on Australian Lepidoptera Series.
Effects of treatment with a microRNA mimic or inhibitor on the developmental competence, quality, epigenetic status and gene expression of buffalo (Bubalus bubalis) somatic cell nuclear transfer embryos
Authors: Sah S. , Sharma A. K. , Singla S. K. , Singh M. K. , Chauhan M. S. , Manik R. S. , Palta P.
Published: January 2020

Expression levels of 13 microRNAs (miRNAs) were compared between buffalo blastocysts produced by somatic cell nuclear transfer through hand-made cloning and IVF to improve cloning efficiency. Expression of miR-22, miR-145, miR-374a and miR-30c was higher, whereas that of miR-29b, miR-101, miR-302b, miR-34a, miR-21 and miR-25 was lower, in nuclear transferred (NT) than IVF embryos; the expression of miR-200b, miR-26a and miR-128 was similar between the two groups. Based on these, miR-145, which is involved in the regulation of pluripotency, was selected for further investigation of NT embryos. miR-145 expression was lowest at the 2-cell stage, increased through the 4-cell stage and was highest at the 8-cell or morula stage in a pattern that was similar between NT and IVF embryos. miR-145 expression was higher in NT than IVF embryos at all stages examined. Treatment of reconstructed embryos 1h after electrofusion with an inhibitor of miR-145 for 1h decreased the apoptotic index and increased the blastocyst rate, total cell number, ratio of cells in the inner cell mass to trophectoderm, global levels of acetylation of histone 3 at lysine 18 and expression of Krueppel-like factor 4 (KLF4), octamer-binding transcription factor 4 (OCT4) and SRY (sex determining region Y)-box 2 (SOX2) in blastocysts. Treatment with an miR-145 mimic had the opposite effects. In conclusion, treatment of NT embryos with an miR-145 inhibitor improves the developmental competence and quality, and increases histone acetylation and expression of pluripotency-related genes.
Superrepellency of underwater hierarchical structures on
Salvinia
leaf
Authors: Xiang Yaolei , Huang Shenglin , Huang Tian-Yun , Dong Ao , Cao Di , Li Hongyuan , Xue Yahui , Lv Pengyu , Duan Huiling
Published: January 2020

Significance

Instability and collapse of the underwater slippery air mattress hinder its applications, after which the air mattress cannot be recovered even on superhydrophobic surfaces like lotus leaves. Beyond superhydrophobicity, we present the underwater superrepellent capacity of
Salvinia
leaves, which can efficiently and robustly recover the invalid slippery air mattress by trapping the replenished air to replace the water in the microstructures. The interconnected wedge-shaped grooves on the base are key to the recovery, which spontaneously transport the replenished air to the entire surface governed by a gas wicking effect. Using 3D printing technology, biomimetic artificial
Salvinia
surfaces are fabricated, which successfully achieves the recovery of the air mattress. This finding will greatly extend the underwater applications of water-repellant surfaces.
Cops5 safeguards genomic stability of embryonic stem cells through regulating cellular metabolism and DNA repair
Authors: Li Peng , Gao Lulu , Cui Tongxi , Zhang Weiyu , Zhao Zixin , Chen Lingyi
Published: January 2020

Significance

Genome integrity is required for clinical applications of pluripotent stem cells. Two major strategies, maintaining low levels of reactive oxygen species (ROS) and high DNA damage repair (DDR) activities, are applied by embryonic stem cells (ESCs) to secure their genomic stability. Here, we demonstrate the pivotal role of Cops5 in safeguarding genome integrity of ESCs. Through regulating the autophagic degradation of Mtch2, Cops5 suppresses oxidative phosphorylation and ROS production, thereby reducing endogenous DNA damage. Meanwhile, Cops5 is also involved in maintaining high DDR activities, including nucleotide excision repair, nonhomologous end joining, and homologous recombination, in ESCs.
Receptor recognition by meningococcal type IV pili relies on a specific complex
N
-glycan
Authors: Le Guennec Loic , Virion Zoé , Bouzinba-Ségard Haniaa , Robbe-Masselot Catherine , Léonard Renaud , Nassif Xavier , Bourdoulous Sandrine , Coureuil Mathieu
Published: January 2020

Bacterial infections are frequently based on the binding of lectin-like adhesins to specific glycan determinants exposed on host cell receptors. These interactions confer species-specific recognition and tropism for particular host tissues and represent attractive antibacterial targets. However, the wide structural diversity of carbohydrates hampers the characterization of specific glycan determinants. Here, we characterized the receptor recognition of type IV pili (Tfp), a key adhesive factor present in numerous bacterial pathogens, using
Neisseria meningitidis
as a model organism. We found that meningococcal Tfp specifically recognize a triantennary sialylated poly-
N
-acetyllactosamine–containing
N
-glycan exposed on the human receptor CD147/Basigin, while fucosylated derivatives of this
N
-glycan impaired bacterial adhesion. Corroborating the inhibitory role of fucosylation on receptor recognition, adhesion of the meningococcus on nonhuman cells expressing human CD147 required prior defucosylation. These findings reveal the molecular basis of the selective receptor recognition by meningococcal Tfp and thereby, identify a potential antibacterial target.
Neuroprotective effect of Annona muricata-derived polysaccharides in neuronal HT22 cell damage induced by hydrogen peroxide
Authors: Kim Woo Sik , Kim Yi-Eun , Cho Eun-Ji , Byun Eui-Baek , Park Woo Yong , Song Ha-Yeon , Kim Kwangwook , Park Sang-Hyun , Byun Eui-Hong
Published: January 2020

Crude extracts and phytochemical compounds derived from Annona muricata leaves have been demonstrated to exert neuroprotective effects. However, the neuroprotective effects of Annona muricata leaves-derived polysaccharide extracts (ALPs) have not been investigated. ALP treatment was shown to induce concentration-dependent antioxidant activity in HT22 cells, and to increase cell viability in H2O2-treated HT22 cells. These effects were correlated with a decrease in major components of oxidation, including: Ca2+, ROS, and malondialdehyde (MDA). Mediators of the intracellular response to oxidation, including Bax, cytochrome c, and cleaved caspases-3, -8, -9, MAPKs, and NF-κB, were positively influenced by ALP treatment under conditions of H2O2-mediated oxidative stress. In addition, ALP restored the expression of superoxide dismutase (SOD) and associated signaling pathways (PARP, PI3K/AKT and Nrf2-mediated HO-1/NQO-1) following H2O2 treatment. These results provide new pharmacological evidence that ALP facilitates neuroprotection via prevention of neuronal oxidative stress and promotion of cell survival signaling pathways.

Abbreviations

ABTS: 2,2ʹ-azino-bis-(3-ethylbenzothiazoline-6-sulfonicacid); AD: Alzheimer’s disease; ALP: polysaccharide extracts isolated from Annona muricata leaves; ARE: antioxidant response element; DPPH: 1,1-diphenyl-picrylhydrazyl; DCFH-DA: 2ʹ,7ʹ-dichlorofluorescin diacetate; ECL: electrochemiluminescence; ERK: extracellular regulated kinase; FBS: Fetal bovine serum; FITC: fluorescein isothiocyanate; FRAP: ferric reducing antioxidant power; HO-1: Heme oxygenase-1; JNK: c-jun N-terminal kinase; MAPKs: mitogen-activated protein kinases; MDA: malondialdehyde; MMP: mitochondrial membrane potential; MTT: 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazoliumbromide; NQO1: NAD(P)H:quinine oxidoreductase 1, Nrf2: nuclear factor-E2-related factor 2; PD: parkinson’s disease; PI3K: phosphatidylinositol-3kinase; PVDF: polyvinylidene difluoride; ROS: reactive oxygen species; SOD: Superoxidedismutase; TPTZ: tripydyltriazine
Symbiotic riboflavin degradation by Microbacterium and Nocardioides bacteria
Authors: Kanazawa Hiroshi , Ozaki Sayoko , Doi Yuki , Masuo Shunsuke , Takaya Naoki
Published: January 2020

Unlike its biosynthetic mechanisms and physiological function, current understanding of riboflavin degradation in soil is limited to a few bacteria that decompose it to lumichrome. Here, we isolated six Microbacterium and three Nocardioides strains. These strains utilized riboflavin and lumichrome, respectively, as carbon sources. Among these strains, we identified Microbacterium paraoxydans R16 (R16) and Nocardioides nitrophenolicus L16 (L16), which were isolated form the same enrichment culture. Co-cultured R16 and L16 reconstituted a riboflavin-degrading interspecies consortium, in which the R16 strain degraded riboflavin to lumichrome and ᴅ-ribose. The L16 strain utilized the lumichrome as a carbon source, indicating that R16 is required for L16 to grow in the consortium. Notably, rates of riboflavin degradation and growth were increased in co-cultured, compared with monocultured R16 cells. These results indicated that a beneficial symbiotic interaction between M. paraoxydans R16 and N. nitrophenolicus L16 results in the ability to degrade riboflavin.
Applying the Theory of Planned Behavior in Functional Food Purchasing: a Young Consumers Perception
Authors: Bakti I G M Y , Sumaedi S , Astrini N J , Rakhmawati T , Yarmen M , Damayanti S
Published: January 2020

The 4.0 industrial era has impact not only on the industrial sector but also on the changes of people’s lifestyle, including the healthy lifestyle changes. More specifically, one of the impacts of the 4.0 industrial era is the growth of functional food industry. This research aims to analyze the effect of attitude, subjective norm, and perceived behavioral control on young consumers’ purchase intention on functional food. This research focused on young consumers because they are susceptible to consume a food that can cause non-communicable diseases. This study used a quantitative approach. A survey was used to collect data. Questionnaires were spread in a university in South Tangerang. This study obtained 123 students that participated in the survey. Multiple regressions analysis was performed to test the conceptual model and the proposed hypotheses. The findings showed that attitude and subjective norm influence the purchase intention of the young consumers to buy functional foods. In the other hand, this research also revealed that perceived behavioural control has no significant impact on repurchase intention.
Increasing performance of straight pattern of rubber tyre on asphalt track due to sulfur composition
Authors: Purboputro P I , Darmawan A S , Hendrawan M A
Published: January 2020

The motion of a ground vehicle is primarily determined by friction force transferred from road via tires. Therefore, the effect of the compound composition on the hardness and wear resistance is investigated. The grip coefficients on the track in wet and dry conditions are also investigated. In this research, the three combinations of black carbon and sulfur composition namely compound 1, compound 2 and compound 3 are provided. The hardness, wear resistance and grip coefficient are then tested. The results of the tests are also compared to the existing compound material which is already on the market. The shore A hardness of compound 1, compound 2 and compound 3 are 75, 75, and 77 respectively. The wear rate of compound 1, compound 2 and compound 3 in dry asphalt condition are 19.49 mm3/sec, 18.64 mm3/sec and 13.42 mm3/sec respectively. The wear rate of compound 1, compound 2 and compound 3 in wet asphalt condition are 6.457 mm3/sec, 5.933 mm3/sec and 4.133 mm3/sec respectively. The grip coefficient of compound 1, compound 2 and compound 3 in dry asphalt condition are 0.756, 0.751, and 0.725 respectively. The grip coefficient of compound 1, compound 2 and compound 3 in wet asphalt condition are 0.702, 0.693, and 0.685 respectively. The compound material already on the market has shore A hardness of 71, wear rate in dry asphalt condition of 11.40 mm3/sec, wear rate in wet asphalt condition of 2.800 mm3/sec, grip coefficient in dry asphalt condition of 0.773 and grip coefficient in wet asphalt condition of 0.727. The shore A hardness and wear rate of compound 1, compound 2 and compound 3 are higher than the shore A hardness and wear rate of the compound material already on the market. While the grip coefficient of compound 1, compound 2 and compound 3 are lower than the grip coefficient of the compound material already on the market.
Performance Improvement in Aerospace Production Through Lean Manufacturing Implementation
Authors: Zahra A Az , Indrawati S , Sulistio J
Published: January 2020

The high demand in aerospace industry require on going improvement to meet its costumer. Prototyping is a form of effort to ensure the quality of airplanes. However, several problems rose in this phase but two of them are significant in disrupting the production system. They are the spare parts tardiness and unnecessary motion leading a high lead time. The objective of this article is to develop lean action plan to reduce lead time in airplane prototyping. The method applied in this paper is divided into three major phases. Firstly, evaluate current system performance using Value Stream Mapping (VSM). Secondly, determine the dominant waste by cooperating waste finding checklist. Finally, develop a lean action plan. Most waste occurred in production activities. Waste of motion is the highest among other waste with the score of 44 followed by waiting with the score of 24. The third highest waste is excess processing with the score of 2. The causes of these wastes are lack of facilities such as machines and tools and inefficient operators in picking and mixing sealant. The lean action plans are to add machines and tools for labelling, adding sealant room and to change the production plant lay out. By doing so, the lead time can be reduced up to 0,25 hours.
A Prototype of Effective Online Teaching Tools with Adaptive Navigation Support
Authors: Hamzah A
Published: January 2020

This paper proposes a prototype of educational system based on adaptive navigation support to help teacher manage their courses online. In a university context, a teacher can have many courses in one semester. The courses consists of several topics with several material and assignments on it. In a such circumstances, a teacher must prepare the topic’s material before they can go to the class. This situation can cause the teacher to overwhelmingly getting busy to identify which courses they want to focus on and which one they do not. Therefore, they need a tools as an aid to choose which courses they should focus on. In this study, a prototype has been built based on adaptive navigation approach to help teacher overcome the situation. Link hiding techniques were used as a mechanism to help user focus on one task at a time.
Sustainable risk mitigation in manufacturing company
Authors: Kusrini E , Handayani S
Published: January 2020

Companies that are not aware of any risk events and sources of risk that occur in the company, will not be able to formulate an appropriate strategy in mitigating risk. This research aims to identify, measure and plan risk mitigation strategies related to sustainable risk. Sustainable risk is related to risks from environmental, economic and social aspects. This research takes a case study in one of the manufacturing companies in Indonesia. This study uses the Failure Mode and Effect Analysis (FMEA) method to identify events and sources of risk and the House of Risk (HOR) to analyze and design risk mitigation. This research identified 14 risk events and 39 sources of risk that occurred in the company. By using the HOR method, 15 priority sustainability risk mitigation actions were obtained.
Study of Energy Saving Performance Contracts Application for Electrical Energy Efficiency in Industrial and Commercial Sectors
Authors: Sanvia F S , Garniwa I , Alvianingsih G , Aryani D R
Published: January 2020

Industrial and Commercial sectors are the largest energy consumption. Building sector is one of the biggest energy consumptions, especially in Industrial and commercial devices, like air conditioning systems, lighting systems, and building transportation systems. Energy Saving Performance Contract (ESPC) could be an alternative to support implementation of energy efficiency in building sector up to 10-30%. This study investigates about application of ESPC for air conditioning system retrofit in Industrial and Commercial building, namely Chiller. Chiller retrofit could produce energy efficiency 210 MWh/year or reduce up to 30% of energy consumption with a 5-year payback period investment. This study can be broadened to develop application of ESPC in Indonesia.
Machine learning approach to air traffic control skill based on mastery theory of aerodrome control procedures, self-concept and practice drills
Authors: Hutabarat Liber Tommy , Sunardy  , Sysvia Tiara , Dwiyanto  , Sinambela Marzuki
Published: January 2020

The objectives of the research were to discover the correlation of mastery theory of aerodrome control procedures toward the skill of air traffic control, self-concept toward the skill of air traffic control, frequency of drills toward the skill of air traffic control and correlation of mastery theory of aerodrome control procedures, self-concept and frequency of drills toward the skill of air traffic control. The population consisted of 105 students and 50 students were taken as the sample through cluster random sampling technique. The results of the research concluded, there was a significantly positive correlation between mastery theory of aerodrome control procedures and skill of air traffic control as shown by coefficient correlation 0.6648, there was a significant positive correlation between self-concept and skill of air traffic control as shown by coefficient correlation 0.5825, there was significant positive correlation between frequency of drills and skill of air traffic control as shown by coefficient correlation 0.4159 and there was significant positive correlation of mastery theory of aerodrome control procedures, self-concept, frequency of drills toward the skill of air traffic control as shown by multiple coefficient correlation 0.740. Determination coefficient of multiple correlations was 0.5478 or 54.78% showed that mastery theory of aerodrome control procedures, self-concept, frequency of drills gave impact on skill of air traffic control.
Energy consumption prediction for electric rickshaw based on load variance
Authors: Siagian Parulian , Napitupulu Richard , Sianturi Libianko , Barus Rohancen P , Mendrofa Omesh , Siregar Wandro , Sinambela Marzuki
Published: January 2020

Electrical Rikshaw forecasting is usually a univariate time series forecasting problem. The recent increase in load variance of electric rickshaw has lead to large available datasets. In this case, we use the machine learning approach based on Long Short Term Memory (LSTM) and Support Vector Machine (SVM). The accurate energy consumption of electric Rickshaw forecasting is depended to train and test real dataset. The time series of electric Rickshaw observed in Mechanical Labs of Universitas HKBP Nomensen, Medan, Indonesia. The main aim of this paper to generate the observation of energy consumption from the electric rickshaw and look for accuracy of electrical load in the substation.
LTE soft handover based on hysteresis and threshold combination
Authors: Pinem Maksum , Rifki Mhd Ikhsan , Sinulingga Emerson P. , Suherman S.
Published: January 2020

This paper proposes the combination of hysteresis and threshold based soft handover in the long-term evolution (LTE) network and presents the performance evaluation. As the simulation conducted, the observations of the generated data show that the threshold margin of -115 dBm with hysteresis margin 24 produces the highest active set, achieving 2.082. The higher the active set value results the lower the outage probability. Outage probability for threshold value of -115 dBm occurs at distance 611 m, reaching only 2.1x10−7.
Emergency patient health service simulation as a supporter of smart health care
Authors: Pardede A M H , Novriyenni N , Kadim L A N
Published: January 2020

Providing health services for patient requests obtained from smart devices installed in each patient can be done if the service center has adequate resources and there are no criteria for emergency patients, but this will be different if in real life an emergency service request occurs. Providing emergency services to hospitals is growing, especially with the introduction and evolution of triage systems by giving priority services to patients based on their level of urgency. Providing services to emergency patients must be a priority in service delivery, because it can be ascertained that this emergency request is closely related to the safety of the patient’s life, such as an accident or sudden onset of disease. Service simulations in patients are carried out using Simulink, by limiting the availability of all the resources in the service center, and providing real life simulation events for 56 emergency patients, and the simulation concludes that priority queuing systems can serve all patient requests and perform as quickly as possible.
Preparation of doped microstructure diffusing film by photocuring micro-imprint
Authors: Jiajia Wang , Jianyun He , Changsong Zhao , Pengcheng Xie , Jinge Tong
Published: January 2020

In this paper, the process of preparing of doped diffusion film by ultraviolet curing micro-embossing was studied. The preparation method of microstructure diffusion film by photo-curing micro-embossing is different from the traditional methods. The effect of irradiation time on the apparent quality and the effect of the percentage of light diffusing agent on the optical properties and tensile properties of the diffusion film were investigated. The results shown that under the condition of 365 nm ultraviolet light wavelength and a light intensity of 800 mW/cm2 , the apparent quality of the diffusion film was good. When the irradiation time was 6 s; and the content of the diffusing agent was 30%, the optical performance was relatively good; the larger the content of the light diffusing agent, the smaller the tensile strength of the diffusing film.
In vitro degradation behavior of as-cast Mg-3Zn-1Ca-0.5 Sr alloy
Authors: Liu Hening , Zhang Kui , Yuan Jiawei , Li Yongjun , Li Xinggang , Ma Minglong , Shi Guoliang , Wang Kaikun
Published: January 2020

Recent advancements in bone implant materials have led to the development of various alloys. In this study, the degradation behavior of the as-cast Mg-3 wt% Zn-1 wt% Ca-0.5 wt% Sr alloy in vitro was investigated using x-ray diffraction (XRD), scanning Kelvin probe force microscopy (SKPFM), and scanning electron microscopy (SEM). Our results demonstrated that the alloy microstructure was composed of α-Mg, a Ca2Mg6Zn3 phase, and a Mg17Sr2 phase. The Ca2Mg6Zn3 phase, which had the smallest absolute potential, was shown to have cathodic protection, while the α-Mg, which had the largest absolute potential, was shown to prefer corrosion. The in vitro corrosion products of the as-cast alloy were Mg(OH)2, a Ca-P compound, and HA. At the beginning of the corrosion, the hydrogen evolution rate of the alloy was fast due to the thin corrosion product layer. With the extension of the corrosion time, the corrosion layer thickened and the hydrogen evolution rate slowed down and stabilized to 1.25 × 10−5 mol cm−2 · h . Due to the high concentration of Ca and Mg ions near the second phase, HA was quickly deposited and an ion exchange channel between the solution and the alloy was formed, making it easier for the Mg, Ca, and Sr ions to enter the solution and promote the formation of HA. The hysteresis effect of Sr element was found, that is, Sr ions were released into the solution after etching for a period of time, which promoted the formation of HA and HA-containing Sr (Sr/HA).
Relationship between thermophysical properties and structure of CMAS glass melts based on chromium slag
Authors: Deng Leibo , Yun Fei , Jia Ruidong , Li Hao , Ren Da , Zhang Xuefeng , Jia Xiaolin
Published: January 2020

In an attempt to determine the relationship among the network structure, viscosity, electrical conductivity, surface tension, and density of chromium-containing glass melts, the variation in glass melt thermophysical properties of the CaO–MgO–Al2O3–SiO2 quaternary system were investigated by comprehensive physical property analysis and Raman spectroscopy. The results demonstrated that the network structural units Q

n
(n = 0, 1, 2, 3) coexisted in the glass melts and their mutual transformation caused changes in the depolymerization degree, leading to a range of viscous activation energies, conductive activation energies, surface tension, and melt densities. Additionally, the logarithm of viscosity varied linearly with the logarithm of electrical conductivity (slope: 0.67–1.54). Meanwhile, the surface tension and melt density decreased with temperature. Consideration of these interrelations is indispensable during the development of chromium-containing slag glass ceramics, particularly for pilot and industrial applications.
Impact of the Current US Preventive Services Task Force Recommendations for Cervical Cancer Screening in Young Women 21 to 29 Years Old
Authors: Morris C Paul , Chowsilpa Sayanan , Mustafa Sara , Chan Isaac , Miller Daniel , Maleki Zahra , Rodriguez Erika F
Published: January 2020

Objectives

In 2012, the US Preventive Services Task Force decreased the recommended frequency of cervical cytology screening to once every 3 years and recommended against testing women younger than 21 years regardless of sexual history. We evaluated the impact of this in 21 to 29-year-old women at a tertiary care academic medical center in 2011 and 2017.

Methods

We retrospectively analyzed Papanicolaou test results at two time points in 21- to 29-year-old women.

Results

There was a decrease in the number of high-grade lesions in 21- to 25-year-old women (odds ratio [OR], 0.36) from 2011 to 2017. Within the 26- to 29-year-old patient group, there was a trend toward a higher percentage of high-grade squamous intraepithelial lesion (HSIL) in 2017 compared to 2011 on cytology, which did not reach statistical significance (OR, 1.46). However, follow-up histologic specimens showed a higher percentage of HSIL in 2017 compared to 2011 in this age group (OR, 2.16).

Conclusions

Our findings suggest that the cervical cancer screening guidelines introduced in 2012 have not had a detrimental impact on the outcomes of cervical cancer screening for 21- to 25-year-old women. However, we need to continue monitoring the effects of decreased screening in 26- to 29-year-old women.
Hybrid Breast Augmentation: A Reliable Formula for Preoperative Assessment of Fat Graft Volume Based on Implant Volume and Projection
Authors: Maximiliano João , Munhoz Alexandre Mendonça , Pedron Mirian , de Oliveira Antonio Carlos Pinto , Duarte Daniele Walter , Neto Rafael , Portinho Ciro Paz , Collares Marcos Vinicius Martins
Published: January 2020

Background

Autogenous fat grafting (AFG) is an established technique used as an adjunct to breast augmentation (BA) to redesign breast shape. Surgeons often use experience and intuition to estimate AFG volume, which can result in incorrect assessment of donor areas and unnecessary fat removal.

Objectives

This aim of this study was to develop a method based on a mathematical formula, which utilizes implant volume and projection to predict AFG volume.

Methods

Thirty patients (60 breasts) underwent primary hybrid BA. A software package (SketchUp) was used to simulate 3-dimensional AFG and implant volumes, which in turn were used to develop an equation for estimating AFG volume according to 3 different implant projections. The results for each group were compared, via Pearson’s correlation coefficient, with the results of the clinical series.

Results

All patients received Motiva Ergonomix SmoothSilk/SilkSurface implants, ranging in volume from 175 to 355 cc (mean, 265 cc), as well as an average AFG volume of 79.2 cc/breast (range, 50-110 cc). Twenty-nine patients (96.6%) were either very satisfied or satisfied during a mean follow-up of 18 months (range, 6-28 months). A high correlation was observed between the AFG performed in the cohort and predictions obtained from the formula (r = 0.938, P < 0.001).

Conclusions

The AFG volume in hybrid BA procedures can be estimated utilizing measurements based on implant volume/projection. This low-cost method can be applied to guide surgical decision-making in patients who are candidates for BA.

Level of Evidence: 4
Rapid Determination of Lead in Urine by Ion Exchange
Authors: Forman Donald T , Garvin James E
Published: January 2020

For routine screening of employees in the lead industry, a method for determination of urinary lead was developed in which this element is removed from urine by means of a chelating agent, eluted, and determined by a modified dithizone method. The method gives values which are about 5% below those obtained by the wet ashing technic, with a precision of ± 2.1% in the range of 2-15 µg. of lead per 50 ml. urine sample. The advantages of the method are that it requires only about 1 hr. to carry out, is convenient, and avoids the time-consuming and potentially hazardous wet ashing step.
Micromethod for the Estimation of Plasma Fibrinogen
Authors: Martinek Robert G , Berry Roland E
Published: January 2020

Fibrinogen is quantitatively precipitated from plasma by 1.20 M phosphate buffer. The amount of precipitated fibrinogen is determined turbidimetrically at 450 mµ. The method requires 0.25 ml. of plasma for the blank and sample. Reliability of the method has been established by comparison with an ammonium sulfate turbidimetric method and a colorimetric method, demonstration of specificity, variation in incubation temperature, demonstration of optimal molarity and pH, and replicate analyses.