bluuebunny/crossref_metadata_2025 huggingface dataset:
Molybdenum oxide on carbon nanotube: Doping stability and correlation with work function
Authors: Park Rebecca Sejung , Kim Hyo Jin Karen , Pitner Gregory , Neumann Christopher , Mitra Subhasish , Wong H.-S. Philip
Published: July 2020

Carbon nanotubes (CNTs) have great potential for future high-performance and energy-efficient transistor technology. To realize this potential, methods to dope the CNTs need to be developed to achieve low parasitic resistance of the transistor. Two key issues present themselves: (a) understanding the doping mechanism of the various methods and (b) stability of the doping method. For instance, although studies on molybdenum oxide (MoOx) demonstrate its ability to heavily dope nanomaterials, the interaction between MoOx and the CNT is unclear. Here, we observe an unstable effect of MoOx on the CNT and demonstrate dielectric passivation as a means to preserve the doping strength. The semiconducting CNTs exhibit greater than 103× reduction in resistance after stably doped with MoOx. By exploiting the instability of MoOx, we delve deeper into clarifying the doping mechanism. The relationship between the time-dependent material property of MoOx and the change in the electrical measurements of CNT devices is investigated to study the role of work function in doping the CNTs. We conclude that the doping mechanism of MoOx on the CNT is due to bandgap modulation by charge transfer, which occurs due to the difference in work function between MoOx and the CNT.
A synergetic hybrid mechanism of piezoelectric and triboelectric for galloping wind energy harvesting
Authors: Wang Qiong , Zou Hong-Xiang , Zhao Lin-Chuan , Li Meng , Wei Ke-Xiang , Huang Liang-Pei , Zhang Wen-Ming
Published: July 2020

Small-scale wind energy harvesting, which can replace batteries to power small electronic devices and realize self-powered systems, has been extensively studied. To improve the working wind-speed range and output power of small-scale wind energy generation systems, we propose a synergetic hybrid piezoelectric and triboelectric mechanism for galloping wind energy harvesting. In this mechanism, a piezoelectric energy harvester (PEH) works in the vibration area and starts working at low wind speeds, while triboelectric nanogenerators work at the vibration boundaries and cooperate with the PEH at high wind speeds. The triboelectric nanogenerator boundaries can (1) constrain the maximum deformation of the beam at high wind speeds to avoid damage to the PEH, (2) increase the vibration frequency to enhance the electromechanical conversion efficiency, and (3) allow the PEH to have a low equivalent stiffness to work effectively at low wind speeds. A dynamic model is presented to characterize the synergetic hybrid piezoelectric–triboelectric wind energy harvester (SHPTWEH) and this is verified by experiments. The results show that the triboelectric nanogenerator boundaries greatly expand the effective working wind-speed range, and the total average power output by the prototype SHPTWEH was 0.24 mW at a wind speed of 14 m/s, which was 2.3 times that of the PEH alone.
Coupling analysis for sway motion box with internal liquid sloshing under wave actions
Authors: Jiang Sheng-Chao , Bai Wei
Published: July 2020

This work investigates the coupling effects of internal sloshing flow on the sway motion response of rectangular box sections. The impulse-response-function method is employed for external wave action, while the viscous two-phase flow model with the volume of fluid interface capturing technique based on the OpenFOAM® package is adopted for the internal sloshing flow. A new lower critical frequency is defined to understand the coupling effects of the internal sloshing flow, which is the corresponding frequency of the minimal sway motion amplitude. The external wave and internal sloshing forces are out-of-phase at the lower critical frequency. The numerical simulations show that the lower critical frequency is equivalent to the sloshing natural frequency when the internal sloshing flow is in the non-breaking pattern. The non-breaking sloshing-induced force approaches the same magnitude as the external wave force, which leads to a zero-amplitude sway motion. When the internal sloshing exhibits the breaking phenomenon, a phase transition of the internal sloshing force can occur, which causes the lower critical frequency to be smaller than the sloshing natural frequency. The increased incident wave amplitude or decreased tank breadth can strengthen the nonlinear behavior of the sloshing coupling action. That is, the sway motion response deviates more from the linear sloshing flow results, including the smaller lower critical frequency and the larger minimal sway motion amplitude. However, with the increased breaking-sloshing-induced nonlinearity, the difference in the sway motion response between the coupling and uncoupling results reduces, which implies a lower coupling effect.
Electromechanical modeling of the transmembrane potential-dependent cell membrane capacitance
Authors: Sabri E. , Lasquellec S. , Brosseau C.
Published: July 2020

The cell membrane experiences deformation and poration due to electrical stress. In this Letter, we develop continuum simulations of the capacitance-transmembrane potential (TMP) characteristics of the cell membrane. The electromechanical properties of biological cells are gaining increasing visibility so that the utility of numerical models should not be underestimated as a means to check and vet experimental analysis. While several early experiments with solvent-containing bilayers have demonstrated a nonlinear electric field dependence of the capacitance of artificial bilayer membranes, it is noteworthy that the TMP dependence of the membrane capacitance and resistance is not commonly reported in the computational literature. We consider both nonuniform tension and compression of the membrane to determine the anisotropic variation of its thickness, which depends on TMP and Young modulus. The membrane capacitance per unit area of the order of 10−2 Fm−2 and the areal membrane resistance of the order of 10−2 Ω m2 can be explained by the core (cytoplasm)-shell (membrane) structure of the cell. Our results show that a quadratic dependence of membrane capacitance and conductance captures the impact of the strain state under electric field excitation. We, furthermore, discuss the different degrees of influence on membrane capacitance and resistance that different structural parameters (cell aspect ratio, membrane thickness, and surface area) have. The method presented here provides a path forward toward exploring different core-shell models of biological cells in order to optimize cell electrodeformation and electroporation.
Air and Moisture Tolerant Synthesis of a Chelated bis(NHC) Methylpalladium(II) Complex Relevant to Alkyl Migration Processes in Catalysis
Authors: Gardiner Michael G. , Ho Curtis C. , McGuinness David S. , Liu Yi Ling
Published: July 2020

An air- and moisture-tolerant alternate synthetic pathway to the preparation of a cationic chelated bis(NHC) methylpalladium(ii) complex, [{(MesIm)2CH2}Pd(Me)(NCMe)][PF6], is described. The pathway involves the isolation of a bis(NHC) AgI complex, [{(MesIm)2CH2}2Ag2][PF6]2, via metallation of the corresponding diimidazolium salt with Ag2O followed by carbene transfer to [(COD)PdBrMe]. This new method avoids a previously reported unstable intermediate that displayed rapid decomposition at room temperature, attaining the targeted cationic methylpalladium(ii) complex in high yield. CO/ethylene copolymerisation catalysis trials are reported showing solvent dependent catalyst lifetime and copolymer yields. Preliminary ethylene insertion studies are also outlined revealing possible pathways leading towards catalyst deactivation.
Signal transducer and activator of transcription (STAT) 1 and STAT3 are expressed in the human ovary and have Janus kinase 1-independent functions in the COV434 human granulosa cell line
Authors: Frost E. R. , Ford E. A. , Peters A. E. , Reed N. L. , McLaughlin E. A. , Baker M. A. , Lovell-Badge R. , Sutherland J. M.
Published: July 2020

Ovarian granulosa cells are fundamental for oocyte maintenance and maturation. Recent studies have demonstrated the importance of members of the Janus kinase (JAK)/signal transducer and activator of transcription (STAT) signalling pathway in the granulosa cell population of mouse and horse ovaries, with perturbation of JAK1 signalling in the mouse shown to impair oocyte maintenance and accelerate primordial follicle activation. The presence and role of the JAK/STAT pathway in human granulosa cells has yet to be elucidated. In this study, expression of JAK1, STAT1 and STAT3 was detected in oocytes and granulosa cells of human ovarian sections from fetal (40 weeks gestation) and premenopausal ovaries (34–41 years of age; n=3). To determine the effects of JAK1 signalling in granulosa cells, the human granulosa-like cell line COV434 was used, with JAK1 inhibition using ruxolitinib. Chemical inhibition of JAK1 in COV434 cells with 100nM ruxolitinib for 72h resulted in significant increases in STAT3 mRNA (P=0.034) and p-Y701-STAT1 protein (P=0.0117), demonstrating a role for JAK1 in modulating STAT in granulosa cells. This study implicates a conserved role for JAK/STAT signalling in human ovary development, warranting further investigation of this pathway in human granulosa cell function.
Premarital relationships and condom use among young people in Suva, Fiji
Authors: Mitchell Elke , Bell Stephen
Published: July 2020

Abstract

Background
Young people in Fiji experience high rates of sexually transmissible infections and early pregnancy. Despite being identified as a key priority group in national strategies, little is known about use of condoms among young people in premarital relationships. This study aimed to enhance understandings of premarital sex and condom use practices among young people in Fiji. Methods: Focus group discussions with 33 young women and men aged 18–29 years and 17 interviews with young women aged 18–26 years in an urban setting in Fiji were conducted. Inductive thematic analysis examined condom use practices. Results: Participants described a range of contextual influences inhibiting or enabling condom use. Factors inhibiting condom use included sociocultural expectations regarding premarital abstinence; young people’s engagement in hidden sexual relationships; limited intergenerational dialogue about sexual health issues; judgmental attitude of staff at condom access points; male dominance of condom use preferences; and belief condoms disrupt intimacy, reduce sexual pleasure and infer a lack of trust. Factors that enhanced condom use included accessing condoms through discreet methods; adult beliefs that supported safe sex practices; and refusing to have sex without a condom. Conclusion: Findings broaden understandings of young people’s condom use practices in Suva, Fiji. The findings illustrate the need for culturally appropriate youth-centred sexual and reproductive health (SRH) programs and services. Specific strategies that might enhance young people’s condom use include community- and youth-led responses; peer condom distribution; provision of condom dispensers in community settings; scaling up of youth-friendly SRH services; and the delivery of comprehensive sexuality and relationships education.
Post-COVID-19 psychosocial intervention in healthcare professionals (Intervención psicosocial postCOVID-19 en personal sanitario)
Authors: Martín-Aragón-Gelabert Maite , Terol-Cantero Maria-Carmen
Published: July 2020

This brief article presents an analysis of the potential consequences of the COVID-19 epidemic for healthcare professionals within a social psychology framework. It also includes several suggestions for designing psychosocial intervention strategies for the post-emergency phase.
The sirtuin inhibitor cambinol reduces intracellular glucosylceramide with ceramide accumulation by inhibiting glucosylceramide synthase
Authors: Ishibashi Yohei , Ito Makoto , Hirabayashi Yoshio
Published: July 2020

The accumulation of glucosylceramide (GlcCer), which is synthesized by UDP-glucose ceramide glucosyltransferase (UGCG), is associated with several diseases, including Gaucher disease and Parkinson’s disease. Since the inhibition of UGCG can be used to treat diseases caused by GlcCer accumulation, several UGCG inhibitors have been developed. In this study, we report on the inhibition of UGCG activity by cambinol, a sirtuin inhibitor. Unlike conventional UGCG inhibitors, cambinol has no structural similarity to GlcCer. LC-ESI MS/MS analysis revealed that the cellular GlcCer levels were reduced by cambinol with an increase in ceramide, the GlcCer precursor. Histidine 193 plays an important role in the inhibition of UGCG via a known UGCG inhibitor, D-PDMP. However, cambinol was found to inhibit UGCG activity in a histidine 193-independent manner. This study provides insights into the mechanism of inhibition of UGCG activity by cambinol, and provides a basis for the development of a cambinol-based novel UGCG inhibitor.
DNA damage in mononuclear cells following maximal exercise in sedentary and physically active lean and obese men
Authors: Peres Alessandra , Da Silva Igor M. , Santos Maeli , Beretta Ângela , Andrade Vanessa Moraes , RomãO Pedro R. T. , Dorneles Gilson P.
Published: July 2020

We evaluated the impact of maximal exercise on oxidative stress and DNA damage in peripheral blood mononuclear cells (PBMC) from sedentary and exercised lean and obese men. PBMC were collected before, immediately and 1‐h after exercise and exposed to hydrogen peroxide (H2O2; 25 and 50 µM, 4 h). A leukocytosis was induced by maximal exercise immediately and 1‐h after exercise in all groups. However, a lymphopenia was observed 1‐h after exercise in the Sedentary obese group. In the control condition, low DNA damage index concomitant to increases in intracellular glutathione content (GSH) was identified immediately after exercise in all groups. However, higher DNA damage index and lipid peroxidation occurred 1‐h after the bout in Sedentary and Exercised Obese groups. PBMC exposed to both H2O2 25 and 50 µM experienced higher DNA damage and lipid peroxidation index immediately after exercise in all groups. Both lipid peroxidation and DNA damage index remained higher in PBMC of Sedentary Lean, Sedentary Obese, and Exercised obese groups obtained 1‐h after exercise in both H2O2 25 and 50 µM, with the highest values identified in PBMC from Sedentary Obese group. However, increases in GSH content were identified in treated PBMC from sedentary and exercised lean groups as well as exercised obese group 1‐h after exercise. Habitual exercise confers increased resistance of PBMC to DNA damage induced by oxidative stress, reducing the detrimental effects of obesity.

Keywords: Exercise, physical activity, DNA damage, obesity, mutagenesis, oxidative stress
Wearable resistance sprint running is superior to training with no load for retaining performance in pre‐season training for rugby athletes
Authors: Feser Erin H. , Bayne Helen , Loubser Ignatius , Bezodis Neil E. , Cronin John B.
Published: July 2020

This study determined the effects of a six‐week lower‐limb wearable resistance training (WRT) intervention on sprint running time, velocity, and horizontal force‐velocity mechanical variables. Twenty‐two collegiate/semi‐professional rugby athletes completed pre‐ and post‐intervention testing of three maximal effort 30 m sprints. A radar device was used to measure sprint running velocity from which horizontal force‐velocity mechanical profiling variables were calculated. All athletes completed two dedicated sprint training sessions a week for six‐weeks during pre‐season. The intervention (wearable resistance, WR) group completed the sessions with 1% body mass load attached to the left and right shanks (i.e. 0.50% body mass load on each limb), whilst the control group completed the same sessions unloaded. For the control group, all variables were found to detrain significantly (p ≤ 0.05) over the training period with large detraining effects (ES > 0.80) for theoretical maximal horizontal force, slope of the force‐velocity profile, maximal ratio of force, index of force application, 5 and 10 m times. For the WR group, there were no significant changes to any recorded variables (all p > 0.05) and all effects of training were trivial or small (ES < 0.50). After adjustment for baseline differences, significant between group differences were found for all variables (large effects, ES > 0.80) except theoretical maximal velocity, 30 m time, and maximal velocity. The addition of light wearable resistance to sprint training during a six‐week pre‐season block enables the maintenance of sprint performance and mechanical output qualities that otherwise would detrain due to inadequate training frequencies.
Loss of decay-accelerating factor triggers podocyte injury and glomerulosclerosis
Authors: Angeletti Andrea , Cantarelli Chiara , Petrosyan Astgik , Andrighetto Sofia , Budge Kelly , D’Agati Vivette D. , Hartzell Susan , Malvi Deborah , Donadei Chiara , Thurman Joshua M. , Galešić-Ljubanović Danica , He John Cijiang , Xiao Wenzhen , Campbell Kirk N. , Wong Jenny , Fischman Clara , Manrique Joaquin , Zaza Gianluigi , Fiaccadori Enrico , La Manna Gaetano , Fribourg Miguel , Leventhal Jeremy , Da Sacco Stefano , Perin Laura , Heeger Peter S. , Cravedi Paolo
Published: July 2020

Kidney glomerulosclerosis commonly progresses to end-stage kidney failure, but pathogenic mechanisms are still poorly understood. Here, we show that podocyte expression of decay-accelerating factor (DAF/CD55), a complement C3 convertase regulator, crucially controls disease in murine models of adriamycin (ADR)-induced focal and segmental glomerulosclerosis (FSGS) and streptozotocin (STZ)-induced diabetic glomerulosclerosis. ADR induces enzymatic cleavage of DAF from podocyte surfaces, leading to complement activation. C3 deficiency or prevention of C3a receptor (C3aR) signaling abrogates disease despite DAF deficiency, confirming complement dependence. Mechanistic studies show that C3a/C3aR ligations on podocytes initiate an autocrine IL-1β/IL-1R1 signaling loop that reduces nephrin expression, causing actin cytoskeleton rearrangement. Uncoupling IL-1β/IL-1R1 signaling prevents disease, providing a causal link. Glomeruli of patients with FSGS lack DAF and stain positive for C3d, and urinary C3a positively correlates with the degree of proteinuria. Together, our data indicate that the development and progression of glomerulosclerosis involve loss of podocyte DAF, triggering local, complement-dependent, IL-1β–induced podocyte injury, potentially identifying new therapeutic targets.
Self-gravitating razor-thin discs around black holes via multi-hole seeds
Authors: Vieira Ronaldo S S
Published: July 2020

We construct self-gravitating razor-thin discs of counterrotating matter around Schwarzschild black holes (BHs) by applying the ‘displace, cut, and reflect’ method to known seed solutions representing multi-holes. All but one of the sources of the seed solution generate the surrounding annular disc, whereas the remaining BH is mapped onto a Schwarzschild BH which lies at the disc centre after the transformation. The discs are infinite in extent, have annular character, and are linearly stable up to the innermost stable circular orbit (ISCO) of the system. The spacetime is asymptotically flat, having finite Arnowitt–Deser–Misner mass. Moreover, all energy conditions for the disc are satisfied for radii larger than the ISCO radius; the method, however, produces counterrotating streams with superluminal velocities in the vicinity of the central BH. We also comment on charged discs around extremal Reissner–Nordström BHs constructed from a Majumdar–Papapetrou N-BH seed solution. These simple examples can be extended to more general ‘BH + disc’ solutions, obtained by the same method from seeds of the type ‘BH + arbitrary axisymmetric source’. A natural follow-up of this work would be to construct discs around Reissner–Nordström BHs with arbitrary charge-to-mass ratio and around Kerr BHs.
Development and validation of experimental modal analysis with fixture-free oblique impact testing based on a vector projection method
Authors: Yee Khoo Shin , Cheng Lian Yee , Chao Ong Zhi , Ismail Zubaidah , Noroozi Siamak
Published: July 2020

Experimental modal analysis (EMA) with oblique excitation (i.e. oblique impact testing) is useful in improving the long test time problem of conventional EMA with normal excitation (i.e. triaxial normal impact testing), in order to extract all the important dynamic characteristics of a 3D complex structure. In this study, a new methodology involving a vector projection method is introduced to find the driving point frequency response function (FRF) in the oblique direction, without the need for a special fixture with an obliquely oriented impedance head. Hence, this presents a low cost and practical solution for scaling the mode shape, as compared to the traditional approach. Moreover, the concurrent forces characteristic of oblique excitation are used in the development of the theoretical relationship between FRFs with oblique excitation and those with normal excitation. This is important for the validation of the oblique impact testing result, such as the FRF and modal parameter estimations. The experimental results show that oblique impact testing has reliable and effective results, as compared with the triaxial normal impact testing, in terms of the FRF correlation, natural frequency discrepancy, modal damping ratio error and modal assurance criterion of the unit modal mass mode shape.
3D numerical analysis of mass diffusion in (nano) composites: the effect of the filler-matrix interphase on barrier properties
Authors: Zid Sarra , Zinet Matthieu , Espuche Eliane
Published: July 2020

Polymer nanocomposites based on impermeable fillers have been widely developed to improve gas barrier properties. These materials have to be viewed as three phase systems: the matrix, the fillers and an interphase layer between the filler and the matrix. In this paper, the effect of the interphase layer on the overall diffusivity of nanocomposites loaded with impermeable disk-like fillers is analyzed and quantified through 3D finite element modeling of mass diffusion. Ideal ordered filler distributions as well as random filler distributions are considered for filler content in the range 1–20 vol%. A parametric study covering interphase thickness to filler thickness ratio values between 0.125 and 0.5 and interphase diffusivity ratio D
interphase/D
matrix values from 10−4 to 106 is presented and discussed. The results show that, depending on their quality (weakly or highly diffusive), the presence of interphases can be either beneficial or totally detrimental to the nanocomposite overall barrier properties. A specific case corresponding to the exact compensation of the tortuosity effect by the diffusion in the interphase layer is evidenced and analyzed. Moreover, the effect of continuous diffusion paths, which may occur between overlapping interphases, is investigated. This effect appears to be particularly critical for the barrier performance in the case of highly diffusive interphases. Finally, a confrontation between our simulation approach and an analytical model as well experimental data is proposed.
Reply to comment on ‘Improvements for drift-diffusion plasma fluid models with explicit time integration’
Authors: Teunissen Jannis
Published: July 2020

This is a reply to the comment of Jiayong Zou on the paper ‘Improvements for drift-diffusion plasma fluid models with explicit time integration’. The criticism in the comment, namely that the current-limited approach is inconsistent with the underlying partial different equations, seems to be invalid. However, this criticism raises an interesting question about the behavior of the current-limited scheme for a given time step, which is discussed in this reply.
Multi-hollow surface dielectric barrier discharge: an ozone generator with flexible performance and supreme efficiency
Authors: Homola Tomáš , Prukner Václav , Hoffer Petr , Šimek Milan
Published: July 2020

This contribution investigates the effects of duty cycle and mass flow of synthetic air and oxygen on the efficiency of ozone generation in multi-hollow surface dielectric barrier discharge (MSDBD). It discloses that the efficiency of ozone generation in MSDBD is significantly higher compared with standard coplanar DBD, surface DBD and volume DBDs. Ozone production yield reached 205.5 ± 29.1 g (kW h)−1(40% duty cycle, 8 slm) and 413.91 ± 58.7 g (kW h)−1(100% duty cycle, 8 slm) at an energy cost of 8.7 and 4.3 eV/molecule for synthetic air and oxygen, respectively. Such high ozone yields arose out of the intrinsic characteristics of MSDBD ceramics, which were efficiently cooled by the flow of the working gas. The amplitude modulation of low-frequency 5 kHz high-voltage sine waveforms facilitates controlled O3production at a nearly constant rate of yield. Since the correct evaluation of ozone production yield requires precise determination of the discharge power, the concentration of ozone and working gas-flow, considerable attention was paid to measurements of these parameters. It is confirmed and experimentally demonstrated herein that correct determination of discharge power lies with Lissajous figure methods, while the determination of power through the direct integration of productu(t)i(t), wherei(t) is measured by Pearson current probe, leads to systematically lower values of calculated power with consequent overestimation of the ozone production yield. The correct determination of discharge power is clearly the key to the proper calculation of ozone production yield and efficiency. Under the DBD discharge conditions presented herein, ozone production yield and efficiency achieved figures as high as 19.5% and 35.2% of theoretical limits recently established for air and oxygen, respectively.
Bose–Einstein condensation of nonequilibrium magnons in confined systems
Authors: Mohseni Morteza , Qaiumzadeh Alireza , Serga Alexander A , Brataas Arne , Hillebrands Burkard , Pirro Philipp
Published: July 2020

We study the formation of a room temperature magnon Bose–Einstein condensate (BEC) in nanoscopic systems and demonstrate that its lifetime is influenced by the spatial confinement. We predict how dipolar interactions and nonlinear magnon scattering assist in the generation of a metastable magnon BEC in energy-quantized nanoscopic devices. We verify our prediction by a full numerical simulation of the Landau–Lisfhitz–Gilbert equation and demonstrate the generation of magnon BEC in confined insulating magnets of yttrium iron garnet. We directly map out the nonlinear magnon scattering processes behind this phase transition to show how fast quantized thermalization channels allow the BEC formation in confined structures. Based on our results, we discuss a new mechanism to manipulate the BEC lifetime in nanoscaled systems. Our study greatly extends the freedom to study dynamics of magnon BEC in realisitc systems and to design integrated circuits for BEC-based applications at room temperature.
Feature Selection in Cross-Project Software Defect Prediction
Authors: Saifudin A , Trisetyarso A , Suparta W , Kang C H , Abbas B S , Heryadi Y
Published: July 2020

Advances in technology have increased the use and complexity of software. The complexity of the software can increase the possibility of defects. Defective software can cause high losses. Fixing defective software requires a high cost because it can spend up 50% of the project schedule. Most software developers don’t document their work properly so that making it difficult to analyse software development history data. Software metrics which use in cross-project software defects prediction have many features. Software metrics usually consist of various measurement techniques, so there are possibilities for their features to be similar. It is possible that these features are similar or irrelevant so that they can cause a decrease in the performance of classifiers. In this study, several feature selection techniques were proposed to select the relevant features. The classification algorithm used is Naive Bayes. Based on the analysis using ANOVA, the SBS and SBFS models can significantly improve the performance of the Naïve Bayes model.
Extended Generic Process Model For Analysis MITM Attack Based On Evil Twin
Authors: Ahmad MS , Lutfi S , Abdullah SD
Published: July 2020

The high of criminal level related to the field of networking, is a threat that is quite dangerous MITM. The perpetrators of this attack use a fake AP (access point) with different gateway settings that are legitimate AP, so this type of attack becomes quite difficult to detect. This is due to the lack of standard operating procedures (SOP) in handling this case. This research was conducted with the aim of making a forensic model based on the analysis stages in the Evil Twin based MITM case using the user side based live forensic method. The results of the forensic investigation in the study resulted in an investigative model of ENFGP (Extended NFGP) which was divided into 10 stages and consisted of 30 completion steps, obtained through the process of testing and implementation methods in the MITM based Evil Twin attack and further testing based on several previous forensic models
Using Self-Organizing Map (SOM) for Clustering and Visualization of New Students based on Grades
Authors: Purbasari I Y , Puspaningrum E Y , Putra A B S
Published: July 2020

Student grouping, particularly in high school, is a necessary process to divide and classify students into classes based on their abilities and interests. Each school may have different approaches to decide the grouping, but most schools use academic grades. The activity occurs every new academic year and schools with plenty of new students registered may feel a bit overwhelmed with this grouping assignment. A decision support system which can automatically perform grouping on a list of students may be able to help the school’s staffs with this repetitive task. A self-organizing map (SOM) is an example of unsupervised learning algorithm using an artificial neural network structure to produce a low dimensional representation from a given input. However, SOM is also known as one of clustering techniques, since dimensionality reduction may also be seen as reducing (or clustering) input data to lower dimensions (or clusters). This research aims to group new enrolled students to a high school based on their academic grades using a SOM learning algorithm. The grades came from their rapport books and national examination results from their previous study. The resulting groups are three distinct clusters which represents Life Sciences, Social Sciences, and Linguistics study areas.
How IT Support a Government Organization’s Agility to Respond Citizen’s Changing Needs?:Literature Review
Authors: Safitri Eristya Maya , Susanto Tony Dwi , Hadiwiyanti Rizka , Pratama Arista
Published: July 2020

Now the use of information technology has changed citizen’s styles and lifestyle. Public services that are practical, very fast and automated is the need for majority of Indonesian society. Coupled with various requests for public services needed by the community with a variety of specific case studies. This certainly has implications for the government in presenting services that suitable with the various needs of the citizen. On the other hand, in increasing the effectiveness and efficiency of public services, the government has shifted its business processes by increasing the adoption of e-government. However, the fact is the IT investments that can reach tens or hundreds millions rupiah every year can be said to be almost non-existent by governments where most of the operational processes are carried out electronically. To overcome this problem, the government should not simply shift the business process with IT adoption on a large scale. The government needs to adopt a model of organizational agility to support government IT agility. In anticipating this, several previous studies have contributed to developing an organizational agility model with IT support. However, the model developed is still not enough to achieve organizational agility. Therefore, in this study will synthesize some previous theories relating to organizational agility using IT support. The result of this study are an analysis of the synthesis of the agility process models of government organizations with IT support.
Detection of Relevant Career Track for Information System Undergraduates Using Profile Matching
Authors: Kusumantara Prisa Marga
Published: July 2020

We are facing the industrial revolution era 4.0 today. The issue of information technology, disruption technology and employment is very urgent. Data from the Indonesian Ministry of Research and Technology and from the Indonesian Ministry of Manpower in 2017 show that Indonesian workers who work not in accordance with their majors are above 50%. The number of jobs relevant graduates are an important value for Information System study program during the assessment by the National Accreditation Agency for Higher Education. So that needs a system to help students for detecting, identifying, and directing them to relevant career track usingDecission Support Systemapproach.Profile Matchingmethod implemented with determining of 17alternatives(career track) and 18criteria(competencies: core=60%, elective=40%) based on IS 2010 curriculum. Whereas weight of each criterion associated with alternatives is stated in 3 variants (significant coverage, some coverage, not required). The highest rank shows that those career track is the most relevant to the student’scriteria(competencies). The other uses of those rank is also able to help students in determining their thesis topic.
Developing and Evaluating a Jejakatua Virtual Campus Tour Prototype Using Auto-stitching Technique
Authors: Suryanto T L M , Wibowo N C
Published: July 2020

This paper describes the design and manufacture of virtual campuses with auto-stitching techniques. The automatic stitching technique using Insta360 allows getting a panoramic view of the 3600 campus area. The creation of a virtual campus is built by each campus to support campus promotion more fully and more closely. The prototype of the Virtual Campus Exploration (Jejakatua) application was implemented at the Faculty of Computer Science UPN “Veterans” Jatim the Jejakatua application page and evaluated by users using a set of questionnaires distributed using Google Forms. The results of testing by the black box test the built system is in accordance with the design and can be operated properly. Studying the questionnaire to 30 respondents from UPN “Veteran” Jatim academicians gave a pretty good average response. So Jejakatua is fully built using the auto-stitching method using Insta360 and is quite feasible to be implemented on Campus.
IDENTIFICATION OF POSITIVE GRAM BIOPESTICIDE BACTERIA USING FUZZY CLUSTERING LEVEL SET and RANDOM FOREST
Authors: Satoto Budi Dwi , Utoyo Imam , Rulaningtyas Riries , Yusuf Muhammad
Published: July 2020

The quality of agricultural land is an important factor for corn farmers in Madura. Control of maize plants is affected by the use of pesticides when viewed from a positive perspective can help humans in terms of eradicating pests that damage agricultural land. But on the other hand, pesticides also have a negative impact on humans and the surrounding environment, namely the breakdown of the food chain. To overcome this problem, biopesticides can be used in the form of bacteria that can kill plant pest organisms (OPT). Bacillus thuringiensis is one of the bacteria that can produce protein crystals that are insect killers (insecticides) when undergoing a sporulation process. By studying this identification, it is expected that farmers can analyZe the use of pesticides and replace them with bio-pesticides that are more environmentally friendly. In this study, an image processing approach was used to identify the presence of biopesticide bacteria. At the pre-processing stage, the stages of a culture of bacterial colonies were carried out on Blood Agar Plate media, followed by repairs to the results of image morphology. Fuzzy Clustering level set is one of the methods used in the image segmentation process. The results of form extraction are then used in the training process to determine the type of bacteria in the sample. This method makes identification of agricultural land easier, faster and costs less. The result is that in processing 100 training data and 25 data testing using Bacilli bacteria with 9 bacterial morphological attributes and 2 identification classes the accuracy value of the Random Forest decision tree was 91%.
Online Survey for supportingand developing IT Master Plan: The case of HVA Toelongredjo Hospital
Authors: Sophan Mochammad Kautsar , Muntasa Arief , Putri Annisa Sukma
Published: July 2020

The IT master plan is a long-term plan in an organization in terms of developing Information Technology to support the organization’s vision and mission. The IT master plan is important for hospitals because it will provide direction on how hospital information systems are built. However, because the main business of a hospital is not IT, it is often the development of hospital information systems without a master plan that the application of information systems that are made does not fit the hospital’s needs. The purpose of this research is to design an online survey system that is used to support the preparation of the IT master plan, especially in hospitals so that it will be easy to get an evaluation of the conditions of implementing IT in hospitals. The online survey system was built using the Unified Software Development Process (USDP) approach. By using this method, it turns out that it is easy to model the system, so that the system analysis and design process can be made quickly. This research was conducted in the HVA Toeloengredjo hospital. The survey application that was built has been used to get a response to the IT conditions at HVA Hospital. On the results of online survey processing analyzed using a Likert scale. It was found that 42 respondents of HVA Hospital stated that 84.30% of IT master plan conditions were ideal supported by good IT conditions of 73.40%, resulting in a level of IT implementation in HVA Hospital is very good.
Measurement of Security Quality of E-Commerce Using Fuzzy Analytical Hierarchy Process
Authors: Prastiti Novi , Rahmanita Eza , Jazari Ibnul
Published: July 2020

The importance of e-commerce website security is to protect e-business and user information. A number of e-commerce security problems arise along with increasing transactions through e-commerce. This research uses Fuzzy Analytic Hierarchy Process (FAHP) method because Fuzzy is used for uncertainty or vague variables, while AHP is very suitable in considering both qualitative and quantitative characteristics that are closer to the real situation. From the research that has been done, the Tokopedia.com site is the best e-commerce in terms of website security. Tokopedia is on first on secure web tests, and on second rank on web asafa tools and observatory tools.
Extraction System Web Content Sports New Based On Web Crawler Multi Thread
Authors: Pramudita Y D , Anamisa D R , Putro S S , Rahmawanto M A
Published: July 2020

Web crawlers are programs that are used by search engines to collect necessary information from the internet automatically according to the rules set by the user. With so much information about sports news on the internet, it takes web crawlers with incredible speed in the process of crawling. There are several previous studies that discussed the process of extracting information in a web document that needs to be considered both in terms of both aspects, including in terms of the structure of the web page and the length of time needed. Therefore, in this research the web crawler application was developed by applying a multi-thread approach. This multi-thread approach to research is used to produce web crawlers that are faster in the process of crawling sports news by involving news sources more than one address at a time. In addition to the multi-thread approach, adjusting the structure of the website pages is also done to ensure the information to be extracted by web crawling. From the results of the multi-thread implementation test on the crawling process, this study has been able to increase speed compared to the single-thread method of 122.95 seconds. But the results of web update detection, have resulted in a speed that decreased by 6.27 seconds in the crawling process with unequal data and the speed on the crawling process has also decreased by 24.76 seconds on server 1 and by 23.92 seconds on server 2.
K-Means Clustering Algorithm for Determination of Clustering of Bangkalan Regional Development Potential
Authors: Doni A F , Negera Y D P , Maria O A H
Published: July 2020

Regional potential is the ability of an area that can be developed to improve the area according to its regional characteristics. This potential can cover social, economic, infrastructure, natural resources, and human resources and their work. To improve regional development, a strategic policy is needed that leads to improving the economy of a region. In this study the regional grouping of 3 agricultural, plantation, and livestock groups in Bangkalan Regency consisted of 18 sub-districts using the K-Means Clustering method, from which the data was processed preprocessing using Scaling transformations starting from the lower limit search and the upper limit, looking for the Lower Limit and Upper Limit, then grouping using K-Means Clustering. From the research, it was found that testing in the agricultural sector with 3 clusters for the initial cluster center 5,7,15 obtained final clusters according to the highest yield criteria in cluster 1 compared to clusters 2 and 3. For testing in the plantation sector with 3 clusters for the initial cluster center 4,7,16 the final clusters were obtained according to the highest yield criteria in cluster 2 compared to clusters 1, and 3 and for testing the livestock sector with 3 clusters at the initial cluster center 3,11,13 the final clusters were obtained according to the criteria it was known that more height in cluster 2 is compared to cluster 1 and 3.
Cryptograph Rsa and Compression Shannon Fano Text File Services at Mobile Devices
Authors: Kuswanto Dwi
Published: July 2020

Text File Services is still an option for sending a message, the visible difference between Text File Services and other services besides the file size of sending messages is the security level. In Instant Messenger there are features to secure conversations with various Cryptograph methods, while Text File Services does not have that feature. Therefore made Text File Services with additional features Cryptograph. Cryptograph method used is the RSA algorithm. The RSA algorithm makes the plaintext increase in the number of characters, so the Compression feature needs to be added to suppress the increase in the number of characters. Shannon Fano is a Compression symbol wise algorithm where each character that is compressed is converted into a new binary code. This compression is intended to reduce the number of Encryption result characters. The results of this study obtained information that the RSA and Shannon Fano methods can be implemented in the text file service, with the longer key being used the longer the process of decryption of messages with the average value of the avalanche effect ciphertext and the result of Compression is relatively the same. The key length used for the possibility of Brute Force is positively correlated with an average Test Compression Ratio of 1.41 and space-saving of 29.37%.
Data Mining Forecasting Sales of Building Materials on CV. Forward Together in Surabaya With Use Time Series
Authors: Hardi S , Fakhrur Rozi N
Published: July 2020

Forecasting is one of the elements essential to making a decision. With increasing competition among entrepreneurs with other entrepreneurs so forecasting is necessary to improve the quality of a building material for consumer satisfaction on the CV. Maju Bersama. The problems will be discussed in this study is to implement the method Deseasonalizing and Exponential Smoothing method for forecasting a building material on the CV. Maju Bersama. The purpose of this research was to determine the forecasting sales of building materials in the future. In this research the procedure used is problem identification, formulation of the problem observation, analysis and drawing conclusions. Data from this research is data from the CV. Forward Together between January 2017 until June 2019. The results obtained from this research is the sale price of building materials with Exsponential smooting MAE method with the accuracy of the smallest value of α = 0.01 is single Exsponential smooting with Randu value α = 0.75 with MAE = 121.41, Bamboo ori value α = 0.97 with MAE = 74.3, Gelam value of α = 0.01 with MAE = 117,15 and MAE values Deseasonalizing. MAE value for randu = 69.55, gelam with value MAE = 177.17, bambu Ori MAE = 117.66. The results of this research is expected to be input to the CV. Maju bersama in taking a decision in improving the quality of construction materials for consumer satisfaction.
The Design of Product Inventory Strategy with System Thinking and Economic Order Quantity Method Approach (Case Study: PT. Y)
Authors: Lufika R D
Published: July 2020

The global supply chain allows companies to distribute their product all around the globe. The companies have to prepare themselves with an integrated system that is involving the possibility to deliver the product to the farthest area within their regional target. However, the limited due date of products generates the distribution and inventory problem that is complex and challenging to solve. One of the methods to solve the distribution problem of products with the due date is to use the system thinking approach to identify the root of the problem. The Economic Order Quantity (EOQ) method is the most reliable method to discover the most cost-effective strategy, especially for products with the limited due date. The company for this case study is PT Y. The main problem of the company is stock out. The result shows the root of the problem in this company is the unstable demand from the customer, storage management, and distribution management. There are similarities between the three root problems. The due date and quantity are the factors that control the three root problems. The result also shows that the EOQ Model that is taking the due date into account is more expensive than regular EOQ model.
Optimization of Pectin Extraction from Pedada Fruit (Sonneratia caseolaris)
Authors: Jariyah  , Murtiningsih  , Widyawati A.
Published: July 2020

Pedada has a high pectin content that can be used for produce pectin. The study aimed to determine the optimum conditions of extraction time and temperature on the quality of pectin. This study consists of 2 stages, the first stage determines the best treatment for temperature and extraction time. The second stage was to determine the optimization of pectin extraction using RSM (Response Surface Methodology). The best treatment for the first extraction was obtained at 80°C and 120 minutes, and the code and experimental level values were obtained +1,414 (94,1421°C:162,426 minutes); +1 (90°C:150 minutes); 0 (80°C:120 minutes); -1 (70°C:90 minutes); -1,414 (65,8579°C:77,5736 minutes). The result of extraction optimization was 89,59°C and 128,55 minutes with a yield of 7,66%, equivalent weight 850,42mg, methoxyl content 3,71%, galacturonic content 85,17% and esterification degree 24,99% with desirability 0,75.