bluuebunny/crossref_metadata_2025 huggingface dataset:
Ergebnisse des Hypothermienetzwerks des Universitätsklinikums Dresden von 2010–2017. Entwicklung der Hypothermietherapie bei Neugeborenen in Deutschland
Authors: Scherer Jonas , Whybra-Trümpler Catharina , Mildenberger Eva
Published: June 2020

Einleitung Die Hypothermiebehandlung (TH) verbessert bei Neugeborenen mit hypoxisch-ischämischer Enzephalopathie (HIE) das Outcome und sollte bei Hinweisen für eine perinatale Asphyxie und Zeichen einer moderaten oder schweren HIE angewendet werden.

Material/Methode Die Häufigkeit der HIE und der Anwendung der TH wurde aus den Daten der Neonatalerhebung und den Daten des 2010 etablierten Hypothermieregisters extrahiert. Letztere wurden darüber hinaus zur Analyse des kurzfristigen Outcomes herangezogen.

Ergebnisse Zwischen 2010 und 2017 schlossen sich 106 der 213 (Stand März 2020) deutschen Perinatalzentren dem Register an. Die Rückantwortquote lag zwischen 22 und 60%. Im Register wurden pro Jahr im Median 164 (IQR 115–224) TH bei Neugeborenen mit HIE erfasst, in der Neonatalerhebung 517 (382–664) bei 543 (432–583) Fällen von HIE. Seit 2014 lag die Zahl der TH über den berichteten Fällen von HIE. Nach TH bei klassischer Indikationsstellung verstarben 10,4% (8–13%) der Neugeborenen. 81% (78–82%) der Neugeborenen wurden nach Hause entlassen, 3,6% (3–5%) in eine Rehabilitationseinrichtung bzw. 5,4% (5–7%) in eine andere Klinik verlegt. Bei Entlassung wurden 89% (87–89%) der Patienten ausschließlich oral ernährt.

Diskussion Nach Etablierung der TH in die klinische Routine stieg die Zahl der behandelten Neugeborenen kontinuierlich an. Aktuell liegt die Zahl der TH über der Anzahl der Neugeborenen mit HIE, was nur schwer zu erklären ist, da das Vorliegen einer moderaten oder schweren HIE Voraussetzung für die TH ist. Die Daten des Hypothermieregisters zeigen für den untersuchten Zeitraum keine deutlichen Veränderungen bezüglich Mortalität oder neurologischem Outcome.
Effect of Reduced Occlusal Thickness with Two Margin Designs on Fracture Resistance of Monolithic Zirconia Crowns
Authors: Jasim Haider Hasan , Findakly Meelad Basil , Mahdi Nada Ali , Mutar Mustafa Tariq
Published: June 2020

Objectives The aim of this study was to compare the effects of two margin designs (shoulderless and slight chamfer) with two occlusal thicknesses on fracture resistance and failure mode of the monolithic zirconia crowns.

Materials and Methods Forty nickel–chromium dies were duplicated from the previous two prepared teeth using a three-dimensional optical scanner. Nickel–chromium supporting dies were divided into two main groups (n = 20) according to the type of margin design: group A, slight chamfer margin design and group B, shoulderless margin design. These groups were further divided into two subgroups according to the occlusal thicknesses (0.5 and 1 mm). The digital imaging of each die was done using a three-dimensional optical scanner, then zirconia blocks were milled by 5-axis machine. The crowns were cleaned by alcohol, air dried, and cemented by resin cement. Next, the crowns were subjected to 500 hot and cold cycles (30 seconds for each cycle). The samples were subjected to a static load until failure using an electronic universal testing machine and fracture resistance was recorded in Newton (N).

Statistical Analysis Data were analyzed using the test of normality (Shapiro–Wilk test) and two-way analysis of variance (ANOVA) test.

Results  The highest mean fracture load was recorded by the shoulderless (1 mm occlusal thickness) subgroup (3,992.5 N), followed by shoulderless (0.5 mm occlusal thickness) subgroup (3,244.4 N), and the slight chamfer (1 mm occlusal thickness) subgroup (2,811 N). The lowest mean of fracture load was recorded by slight chamfer (0.5 mm occlusal thickness) subgroup (1,632.9 N). The two-way ANOVA test revealed a significant difference between the four subgroups. Regarding the fracture mode, the slight chamfer subgroups showed a severe fracture of the restoration while the shoulderless subgroups showed a fracture through the midline of the restoration.

Conclusion Within the limitation of the comparative study, shoulderless margin design has a more favorable outcome than a slight chamfer design in all thicknesses. Although the restoration with reduced occlusal thickness has lower fracture resistance than 1 mm occlusal thickness, the 0.5 mm restorations still can tolerate occlusal forces.
Lehren aus der Pandemie: Corona als Chance für Querdenker
Authors: Ekkernkamp Axel
Published: June 2020

Ich habe vollstes Verständnis dafür, dass Sie Begriffe wie Digitalisierung und jetzt auch Coronakrise nicht mehr hören wollen.
Facharzt für Infektiologie: Keimen auf der Spur
Authors: König Romy
Published: June 2020

Es mangelt in Deutschland an infektiologisch geschulten Medizinern – seit Jahren schon. Dabei hilft ihre Expertise nachweislich, die Überlebenschance von infektiös erkrankten Menschen zu steigern. Mit den Anstrengungen, eine Ausbreitung des Corona-Virus einzudämmen, wird eine alte Forderung laut: einen Facharzt für Infektiologie einzuführen.
Corona-Pandemie: Zwangspause mit Beigeschmack
Authors: Kohrs Jens
Published: June 2020

„Paradox“, „grotesk“, „unanständig“ – mitten in der Coronakrise ist eine Diskussion über Kurzarbeit in deutschen Krankenhäusern entbrannt. Kliniken, die sie für Pflegekräfte und Ärzte planten und einführten, mussten heftige Kritik einstecken. Die Häuser argumentieren vor allem mit leeren Betten.
Ablaufsteuerung im OP: Prozessoptimierung ist Teamarbeit
Authors: Kucera Martin
Published: June 2020

Bereits 2018 hat die Kaufmännische Leiterin des Zentrums für Anästhesiologie und Intensivmedizin am Universitätsklinikum Hamburg-Eppendorf ein Projekt zur optimierten OP-Steuerung initiiert. Statt externen Gutachten zu vertrauen, baut es auf jene Kompetenz, die im eigenen Haus zur Verfügung steht. Die Strategie scheint aufzugehen.
From Working in the Fields to Taking Control. Towards a Typology of Women's Decision-Making in Wheat in India
Authors: Farnworth Cathy Rozel , Jafry Tahseen , Bharati Preeti , Badstue Lone , Yadav Ashok
Published: June 2020

Women in India perform a range of roles in wheat-based agricultural systems. However, data remain sparse. Cultural norms which construct men as farmers serve to conceal women’s contributions from researchers and rural advisory services. We use data from communities in four Indian states, selected to exemplify high and low gender gaps, to provide insights into how women are challenging norms which privilege male decision-making in order to participate in innovation processes. We hypothesized the transitioning of women from labourers in wheat to innovators and managers of wheat is likely to be far from straightforward. We further hypothesized that women are actively managing the processes unleashed by various sources of change. We use the concept of doxa—ideas and actions in a society that are taken for granted and are beyond questioning—as an analytic lens to help us understand the ways in which women deploy their agency to secure their goals. Our analysis allows us to develop a ‘A typology of women’s strategies to strengthen their managerial decision-making power in wheat’.
Scaling arguments for a plasma experiment relevant to an interplanetary coronal mass ejection
Authors: Young R. P. , Kuranz C. C.
Published: June 2020

We present the design of a plasma experiment scaled to be relevant to an interplanetary coronal mass ejection (ICME) traveling from the Sun to the Earth. The experiment would launch a compact torus of plasma (the scaled analog of the coronal mass ejected by the Sun) into a magnetized background plasma (the scaled analog of the interplanetary medium, the diffuse magnetized plasma that fills the Solar System). We present the complete process of scaling the ICME system to a laboratory experiment: beginning with the ICME features that we aim to replicate with a laboratory experiment, explaining how these desired features are translated into specific design constraints, and presenting a set of experimental parameters that meet those constraints. We find that the experiment would be possible with plasma conditions typically achieved in large-scale facilities such as the Big Red Ball at the University of Wisconsin or the LArge Plasma Device at the University of California, Los Angeles.
Dalton Project: A Python platform for molecular- and electronic-structure simulations of complex systems
Authors: Olsen Jógvan Magnus Haugaard , Reine Simen , Vahtras Olav , Kjellgren Erik , Reinholdt Peter , Hjorth Dundas Karen Oda , Li Xin , Cukras Janusz , Ringholm Magnus , Hedegård Erik D. , Di Remigio Roberto , List Nanna H. , Faber Rasmus , Cabral Tenorio Bruno Nunes , Bast Radovan , Pedersen Thomas Bondo , Rinkevicius Zilvinas , Sauer Stephan P. A. , Mikkelsen Kurt V. , Kongsted Jacob , Coriani Sonia , Ruud Kenneth , Helgaker Trygve , Jensen Hans Jørgen Aa. , Norman Patrick
Published: June 2020

The Dalton Project provides a uniform platform access to the underlying full-fledged quantum chemistry codes Dalton and LSDalton as well as the PyFraME package for automatized fragmentation and parameterization of complex molecular environments. The platform is written in Python and defines a means for library communication and interaction. Intermediate data such as integrals are exposed to the platform and made accessible to the user in the form of NumPy arrays, and the resulting data are extracted, analyzed, and visualized. Complex computational protocols that may, for instance, arise due to a need for environment fragmentation and configuration-space sampling of biochemical systems are readily assisted by the platform. The platform is designed to host additional software libraries and will serve as a hub for future modular software development efforts in the distributed Dalton community.
Bound states of light bullets in passively mode-locked semiconductor lasers
Authors: Dohmen Fabian , Javaloyes Julien , Gurevich Svetlana V.
Published: June 2020

In this paper, we analyze the dynamics and formation mechanisms of bound states (BSs) of light bullets in the output of a laser coupled to a distant saturable absorber. First, we approximate the full three-dimensional set of Haus master equations by a reduced equation governing the dynamics of the transverse profile. This effective theory allows us to perform a detailed multiparameter bifurcation study and to identify the different mechanisms of instability of BSs. In addition, our analysis reveals a non-intuitive dependence of the stability region as a function of the linewidth enhancement factors and the field diffusion. Our results are confirmed by direct numerical simulations of the full system.
Concepts from the linear magnetoelectric effect that might be useful for antiferromagnetic spintronics
Authors: Thöle Florian , Keliri Andriani , Spaldin Nicola A.
Published: June 2020

We discuss the correspondence between the current-induced spin polarization in non-centrosymmetric magnetic metals and the linear magnetoelectric effect in non-centrosymmetric magnetic insulators using a linear-response theory and the concept of magnetoelectric multipoles. We show that the magnetoelectric toroidal moment is a particularly useful quantity since it determines the ground-state antiferromagnetic domain of a non-centrosymmetric antiferromagnet in the presence of a steady-state electric current. We analyze two prototypical antiferromagnetic spintronic materials—Mn2Au and CuMnAs—and show that the experimentally reported domain reorientations are consistent with the alignment of their toroidal moments parallel to the applied electric current. Finally, we determine whether similar behavior should be expected in the prototypical insulating magnetoelectric materials, Cr2O3 and LiMPO4, if they could be doped into a semiconducting or metallic regime.
A graphene-based magnetoplasmonic metasurface for actively tunable transmission and polarization rotation at terahertz frequencies
Authors: Padmanabhan Prashant , Boubanga-Tombet Stephane , Fukidome Hirokazu , Otsuji Taiichi , Prasankumar Rohit P.
Published: June 2020

The rise of terahertz (THz)-based technologies has prompted intense interest in methods for manipulating the properties of THz radiation. In this Letter, we experimentally demonstrate a graphene micro-ribbon-based metasurface that allows us to tailor and dynamically tune the transmission and polarization rotation spectra of impinging THz pulses. This is achieved by controlling the geometry of the ribbon pattern and the applied DC magnetic field, both of which strongly influence the magnetoplasmonic response of the metasurface. The properties of the metasurface can be accurately modeled using an effective medium approach that considers the capacitive interaction of the ribbons resulting from the THz electric field. Our results highlight the promise of graphene-based THz devices that leverage the strongly enhanced light–matter interactions resulting from patterning.
Benchmarking the forward–backward trajectory solution of the quantum-classical Liouville equation
Authors: Braver Yakov , Valkunas Leonas , Gelzinis Andrius
Published: June 2020

Various quantum-classical approaches to the simulation of processes taking place in real molecular systems have been shown to provide quantitatively correct results in a number of scenarios. However, it is not immediately clear how strongly the approximations related to the classical treatment of the system’s environment compromise the accuracy of these methods. In this work, we present the analysis of the accuracy of the forward–backward trajectory solution (FBTS) of the quantum-classical Liouville equation. To this end, we simulate the excitation dynamics in a molecular dimer using the FBTS and the exact hierarchical equations of motion approach. To facilitate the understanding of the possible benefits of the FBTS, the simulations are also performed using a closely related quantum-classical Poisson Bracket Mapping Equation (PBME) method, as well as the well-known Förster and Redfield theories. We conclude that the FBTS is considerably more accurate than the PBME and the perturbative approaches for most realistic parameter sets and is, therefore, more versatile. We investigate the impact each parameter has on the accuracy of the FBTS. Our results can be used to predict whether the FBTS may be expected to yield satisfactory results when calculating system dynamics for the given system parameters.
Error-free data transmission through fast broadband all-optical modulation in graphene–silicon optoelectronics
Authors: Zhou Hao , Zhu Xiaoliang , Gu Tingyi , Wu Jiagui , Deng Guoliang , Huang Shu-Wei , Ophir Noam , Yu Mingbin , Kwong Dim-Lee , Zhou Shouhuan , Bergman Keren , Wong Chee Wei
Published: June 2020

Ultrafast third order nonlinearity in silicon photonics is promising for all-optical signal processing beyond 100 Gbit/s. However, the coexistence of slower dynamical responses, such as mesoscopic Drude free-carrier plasma or thermal nonlinearities, degrades high-speed signal integrity. Here, we introduce atomic-layer graphene onto the silicon nanophotonic platform to leverage its unique nondegenerate two-photon absorption and ultrafast carrier dynamics, demonstrating broadband and fast bitrate transmission through cross-absorption modulation. Multichannel error-free optical transmission across telecommunication C- and L-bands is demonstrated with 10−12  bit-error rates at a data transmission rate of 1 Gbps. The bandwidth of the hybrid silicon–graphene structure is demonstrated at least up to 25 GHz. The broadband cross-absorption modulation over 640 nm in graphene–silicon optoelectronics provides a promising scalable material platform for high-speed all-optical signal processing.
Probing unintentional Fe impurity incorporation in MOCVD homoepitaxy GaN: Toward GaN vertical power devices
Authors: Zhang Yuxuan , Chen Zhaoying , Li Wenbo , Lee Hyunsoo , Karim Md Rezaul , Arehart Aaron R. , Ringel Steven A. , Rajan Siddharth , Zhao Hongping
Published: June 2020

Unintentional impurity incorporation in GaN drift layers represents a challenging issue that can limit their potential performance in vertical power devices. In this paper, we focus on studying the origins of Fe impurity incorporation in metal-organic chemical vapor deposition (MOCVD) grown GaN materials. Acting as a compensator in n-type GaN drift layers, Fe impurities can reduce the electron mobility in GaN and limit the lowest controllable doping level. Two sources, the sample cleaning process and growth susceptor, were identified as the main mechanisms of Fe incorporation in the MOCVD GaN growth process. It was found that solvent cleaning of the wafer can introduce significant Fe contamination at the growth interface, which would slowly be incorporated into the GaN epilayer, thus causing background Fe impurity as high as 1017 cm−3 level. Moreover, the Fe impurity in the coating material on the susceptor can introduce additional Fe impurity during the growth process. Our studies revealed that the Fe impurity level could be significantly suppressed by more than two orders when an alternative cleaning process was used and the susceptor surface was fully covered by substrates. Characterization of the Fe impurity concentrations was performed via secondary ion mass spectrometry. The trap level (EC − 0.57) eV from deep-level transient spectroscopy that had previously been attributed to Fe confirmed the carrier compensation effect from Fe. Room temperature Hall mobility as high as 1007 cm2/V s was achieved on the MOCVD grown low-Fe GaN. Results from this work will provide guidance for achieving high purity GaN toward high performance GaN vertical power devices.
Fluorescence polarization filtering for accurate single molecule localization
Authors: Nevskyi Oleksii , Tsukanov Roman , Gregor Ingo , Karedla Narain , Enderlein Jörg
Published: June 2020

Single-Molecule Localization Microscopy (SMLM) has become one of the most important methods of super-resolution fluorescence microscopy. It is based on the precise localization of single molecules in wide-field microscopy images. It is well known that the localization accuracy can show a significant bias if the imaged molecules have a fixed orientation and are located either close to an interface or not exactly within the focal plane of the microscope. In this Letter, we propose a simple solution to this problem, which is based on polarization-resolved imaging. This method can be easily implemented into any existing SMLM setup, and we demonstrate its performance by imaging single dye molecules embedded into a polymer film, which fixes their orientation in space.
A simple system for neutron diffraction at 4 K and elevated pressures
Authors: Ridley Christopher J. , Funnell Nicholas P. , Offer Colin , Bull Craig L.
Published: June 2020

We describe a unique cryogen-free closed-cycle refrigerator system using a beryllium–copper VX1 variant of the Paris–Edinburgh press, which enables approximately 3 GPa to be generated on a sample volume of 66 mm3, over the temperature range of 4 K–300 K. The main advantage of this system is its versatility; it has been designed to be fully compatible with the PEARL neutron powder-diffraction instrument at the ISIS facility, but is also compatible with several other instruments at the facility with minor modifications. We provide a full description of the system, along with representative data collected on PEARL from MnF2 at 13 K and 2.4 GPa.
Acceptability and consensus for the management of game and non-game crop raiders
Authors: Kontsiotis Vasileios J. , Vadikolios Georgios , Liordos Vasilios
Published: June 2020

Abstract ContextWild boars (Sus scrofa) and European badgers (Meles meles) have been increasingly implicated in crop damage in Greece. The species’ increasing presence on agricultural land has also raised concern about disease transmission to livestock and humans. Greece does not have any plans for the management of these situations, because they have only recently emerged. Understanding public preferences for management strategies is necessary for the successful implementation of management plans. AimsTo survey residents of Eastern Macedonia and Thrace, north-eastern Greece, to understand variation between stakeholder groups in preferences for the management of wild boars and European badgers in different scenarios. MethodsData were collected from on-site face-to-face surveys (n=585), between September and November 2017. Respondents, assigned to one of general public, farmers, hunters and farmer-hunter groups, were asked to rate their acceptability of wild boar and European badger management strategies under four conflict scenarios: wild boars and European badgers raid crops and transfer disease. Key resultsStakeholders preferred less invasive strategies for the management of crop raiders, although they accepted lethal control in the more severe disease-transmission scenarios. Potential for conflict was higher for non-lethal control in the crop-raiding scenarios and for lethal control in the disease-transmission scenarios. Farmers and farmer-hunters were the groups more strongly supporting management strategies in all scenarios. Hunters were more reluctant to accept the reduction in numbers of a game species (i.e. the wild boar) than of a non-game species (i.e. the European badger). ConclusionsVariation in the acceptability of and consensus for wild boar and European badger management strategies was considerable, both among and within groups. ImplicationsFindings are a critical guide for the design of a conflict-management process aimed at reaching consensus for proper management strategies. This would allow for the successful management of human conflicts over wildlife.
Covert hate speech
Authors: Baider Fabienne , Constantinou Maria
Published: June 2020

Previous research on extremist discourse has revealed that racism is linguistically shaped by its socio-cultural context. For instance, a comparison between Greek Cypriot and Greek online data indicated that the two communities use different linguistic means and strategies to express their aversion to the Other, and that Greek comments are more overtly insulting than Greek Cypriot comments (Baider and Constantinou 2017a;Assimakopoulos and Baider 2019). The present study focuses on how irony is used to disseminate hate speech, albeit covertly. Our dataset comprises online Greek and Greek Cypriot comments posted on social media and collected during the same period of time (2015- 2016) within an EU project. We use concepts such asverisimilitudeandovert untruthfulnessto deconstruct ironic racist comments. We conclude that irony in both datasets fulfils three socio-pragmatic functions: it serves to insult or humiliate members of groups targeted for their ethnic identity; it creates or reinforces negative feelings against such groups; it promotes beliefs that could be used to legitimate their mistreatment. Regarding socio-cultural differences, it emerges that the use of the Greek Cypriot vernacular and the appeal to indigenous in-group social stereotypes influence the way irony shapes racist comments and reinforces in-group membership.
Dispersion of exciton-polariton based on ZnO/MgZnO quantum wells at room temperature*
Authors: Zheng Huying , Chen Zhiyang , Zhu Hai , Tang Ziying , Wang Yaqi , Wei Haiyuan , Shan Chongxin
Published: June 2020

We report observation of dispersion for coupled exciton-polariton in a plate microcavity combining with ZnO/MgZnO multi-quantum well (QW) at room temperature. Benefited from the large exciton binding energy and giant oscillator strength, the room-temperature Rabi splitting energy can be enhanced to be as large as 60 meV. The results of excitonic polariton dispersion can be well described using the coupling wave model. It is demonstrated that mode modification between polariton branches allowing, just by controlling the pumping location, to tune the photonic fraction in the different detuning can be investigated comprehensively. Our results present a direct observation of the exciton-polariton dispersions based on two-dimensional oxide semiconductor quantum wells, thus provide a feasible road for coupling of exciton with photon and pave the way for realizing novel polariton-type optoelectronic devices.
A theoretical study on chemical ordering of 38-atom trimetallic Pd–Ag–Pt nanoalloys
Authors: Taran Songül , Garip Ali Kemal , Arslan Haydar
Published: June 2020

In this study, truncated octahedron (TO) structure is selected for further analysis and we focus on 38-atom Pd–Pt–Ag trimetallic nanoalloys. The best chemical ordering structures of Pd
n
Ag32 – n
Pt6 trimetallic nanoalloys are obtained at Gupta level. The structures with the lowest energy at Gupta level are then re-optimized by density functional theory (DFT) relaxations and DFT results confirm the Gupta level calculations with small shifts on bond lengths indicating TO structure is favorable for 38-atom of Pd
n
Ag32 – n
Pt6 trimetallic nanoalloys. The DFT excess energy analysis shows that Pd8Ag24Pt6 composition has the lowest excess energy value in common with excess energy analysis at Gupta level. In Pd8Ag24Pt6 composition, eight Pd atoms are central sites of 8 (111) hexagonal facets of TO, 24 Ag atoms locate on surface, and 6 Pt atoms locate at the core of the structure. It is also obtained that all of the compositions except Pd18Ag14Pt6 and Pd20Ag12Pt6 exhibit a octahedral Pt core. Besides, it is observed that there is a clear tendency for Ag atoms to segregate to the surface and also Pt atoms prefer to locate at core due to order parameter (R) variations.
Recent progress in optoelectronic neuromorphic devices*
Authors: Guo Yan-Bo , Zhu Li-Qiang
Published: June 2020

Rapid developments in artificial intelligence trigger demands for perception and learning of external environments through visual perception systems. Neuromorphic devices and integrated system with photosensing and response functions can be constructed to mimic complex biological visual sensing behaviors. Here, recent progresses on optoelectronic neuromorphic memristors and optoelectronic neuromorphic transistors are briefly reviewed. A variety of visual synaptic functions stimulated on optoelectronic neuromorphic devices are discussed, including light-triggered short-term plasticities, long-term plasticities, and neural facilitation. These optoelectronic neuromorphic devices can also mimic human visual perception, information processing, and cognition. The optoelectronic neuromorphic devices that simulate biological visual perception functions will have potential application prospects in areas such as bionic neurological optoelectronic systems and intelligent robots.
The development of a trusted mechanism in building a web service to ensure the quality of data and information in the Universitas Jambi databorang application by using the ADDIE model
Authors: Marzal J , Syamsurizal  , Saputra E , Utomo P E P
Published: June 2020

Developers or users of an application that utilizes various databases demand accurate data through a web service, and it is a challenge to provide a trusted web service. This study aims to develop a trusted mechanism in building the Universitas Jambi’s web service by applying the ADDIE model. Data from the web service will be queried by a Databorang Application. The trusted mechanisms produced in this study are: 1) Analysis of data and information requirements, 2) Web service design, 3) Development of web service which has procedures: query development, validation of queries by experts, validation of results from users through the Databorang application, 4) Implementation, and 5) Evaluation. In a restricted deployment it was revealed that the user strongly believes in the truth of the data / information displayed by the application of Databorang. In line with the increasing data retrieval functions on the webservice, it is hoped that the webservice can act as the data center of the University of Jambi in the future.
Development of wall follower hexapod robot
Authors: Ariawan K U , Nurhayata I G , Sutaya I W
Published: June 2020

This study aims to develop a six-legged robot that is able to walk in an arena that resembles a maze (maze wall) and is able to follow a wall (wall follower). This robot is competed in the Indonesian Robot Contest (KRI) in the Indonesian Fire Extinguisher Robot Contest (KRPAI) division which is held annually by the Directorate of Student Affairs, the Directorate General of Learning and Student Affairs, the Ministry of Research, Technology and Higher Education. The research design consisted of 4 stages, including: mechanical design, electronic design, joint movement design at the robot’s foot, and software design. The final result of this research was a six-legged robot design (hexapod) with robot dimensions of 29 cm × 29 cm × 25 cm (length × width × height). From several tests, the robot’s success rate in completing the mission was 100%, with an average time of 16.73 seconds and the fastest time to complete the mission reached 15.85 seconds. Thus, the robot is expected to be included in the Indonesian Robot Contest (KRI) in 2020.
Creating kit and plc application with industrial applications for practice learning of plc technology in electronics Nusaputra university Sukabumi
Authors: Artiyasa M , Destria N , Desima M A
Published: June 2020

The purpose of this research was to develop PLC technology lessons so that they would be more easily practiced and so students could more easily master PLC Technology Studies, so that after graduation it is not difficult to find work, especially in the PLC field. The subjects of this research were students who studied PLC Technology were taken as samples and then given a pretest and their grades, they were given training that was taken from the module, after that, they were given appropriate module lessons from the introduction of the Kit, PLC and HMI themselves, inputs and outputs, their functions and the application, then ladder diagram and finally the wiring and the application. Methods for this research is research and development with steps of 1) Problem Analysis, 2)Data collection, 3) Product Design, 4) Design Validation, 5) Design Revision, 6) Product Testing, and 7) Analysis and Reporting. The feasibility of the PLC trainer and job sheet that had been made were obtained from the validation results by 5 validators and students responses to determine students responses to the media. The results of the study are in the form of KIT and PLC applications for industry, video tutorials, and modules and also outputs that were accredited and national journals. From the result, it can be seen that student made progress from grade from mean 53 from pretest to mean 86 from the post-test.
Developing inventory information system using mobile computing with quick response (2d-barcode) and geotagging
Authors: Setemen K , Sudirtha I G , Marsiti C I R , Dantes G R , Suputra P H
Published: June 2020

Inventory management is the main task of an organization to reach its objective of maintaining the number of stocks precisely and minimizing waste. Web-based inventory management in a university environment is expected to help the employees in keeping up with innovations on the status of tools and equipment. It is only fitting that inventory data management is also capable of accommodating distance. The use of the internet by using mobile computing which automatically can do tagging of inventories including information about the coordinate will broaden the potential of database using mobile computing technology with wireless data communication aided with 2D-barcode decoding automatization makes it possible to synchronize (record and track) on-line to the central database using some computers that work simultaneously and directly from the field. This inventory system can synchronize data directly from the field and the information can simultaneously be accessed by the users. Mobile computing (android Smartphone, computer tablet) is used as a mobile station that is capable of decoding the tags of inventories and buildings (in the 2D-barcode) and associating automatically with the database wireless networks and the internet to eliminate the distance factor and overhead-process (pre-processing of data from the field to the data storing station).
The development of “I Sangging Lobangkara” balinese folklore as an android based game
Authors: Ardani N L P , Dermawan K T , Arthana I K R , Putrama I M
Published: June 2020

The main goal of this study was to create an android game that introduces and maintains Balinese Folklore I Sangging Lobangkara. Balinese Folklore I Sangging Lobangkara has a lot of moral value that began to be forgotten. This folklore was about a very famous painter, I Sangging Lobangkara. Hearing the news of I Sangging Lobangkara’s skill in drawing, The King invited him to The Palace to test his skill. Those challenges from The King were packed as the challenge of the game. The game of Balinese folklore I Sangging Lobangkara was developed using Android Studio with library libGdx. The testing of the application was done by white box testing, black box testing, content expert testing, media expert testing, and user usability testing. Balinese folklore “I Sangging Lobangkara” game in Android successfully applied in all of the android’s features which is tested and there was not any error found.
Development of population document authentication system using a .p12 certificate
Authors: Prasetyo T S H , Pradnyana G A , Putrama I M
Published: June 2020

Government policies related to electronic transactions provide many positive responses. Throughthis policy, government services relating to authentication such as population documents can be done electronically while still paying attention to their validity. In the current service process, the document archive is less organized both in village and sub-district offices and the completion of documents is hampered for days because the officials are not available. To overcome this, a system that can overcome these problems is needed. In this system, the validity of the document was still observed by digital signing using an electronic certificate (.p12). Then, the development of this system was conducted using the waterfall model. There were three tests carried out namely the black-box test, white-box, usability testing using the system usability scale, and the user response test. The development of this system has passed the black-box test and white-box test, the overall results were in line with expectations. As for the usability scale system, the results of the category are acceptable. Then the user response test was conducted on five user roles and obtained the results with an average percentage that is in very good range.
Preventive maintenance of mechanical component development guideline on government building based work breakdown structure
Authors: Djonli Y , Latief Y , Machfudiyanto R A
Published: June 2020

Building is a physical form of construction work which is integrated with its domain, partly or fully on the surface and / or underneath the land and / or water, which functions as a place for people to carry out their activities. Buildings must be able to fulfill their functions. However, over the course of time and utilization, they will suffer from damage caused by various aspects, such as the mechanical components of the building. One of the efforts that can be done to reduce the damage is by doing preventive maintenance work. Preventive maintenance work includes tasks or measures taken to prevent the need for repairs. In the buildings preventive maintenance process, the scope of work can be arranged by using Work Breakdown Structure (WBS), hence a structured and activity oriented grouping can be achieved. However, in the application of government buildings there are no guidelines for WBS-based preventive maintenance work yet. Therefore, developing preventive maintenance work guidelines to improve care and maintenance performance is an important task in project management. The research methodology consisted of several stages, namely the literature study, archives analysis with data and information from previous research and related projects, case studies, and Delphi techniques through the validation of experienced experts. The result of this research was that WBS-based preventive maintenance work guidelines for mechanical components of government buildings could improve the quality of buildings and the effectiveness and efficiency of building maintenance.
The effectiveness of learning in vocational education in mechatronics through making a simple simulation program
Authors: Artanto D , Budi Cahyono E A , Siswoyo A , Effendi S M
Published: June 2020

As one of vocational education in Indonesia, Politeknik Mekatronika Sanata Dharma must be able to produce graduates who are competent and skilled in the field of mechatronics. In order to achieve this, practical and workshop learning must be given a large portion. However, some practical tools available are limited, due to constraints in the cost of procuring equipment that is quite expensive. This paper presents an active learning through the practice of developing a simple industrial control simulation program, using Proteus and LabVIEW software. One example of the control simulation presented here is the control on the conveyor as a supplier of items. From the observation and learning evaluation, it was found that by making a simple simulation program, students more easily develop skills in mathematics, logical thinking and problem solving. The effectiveness of learning can be measured from the value of student satisfaction and involvement, which in the example here is quite high. Students were enthusiastic and involved, starting from the design of the conveyor simulation image, making the simulation circuit in Proteus, programming the microcontroller, and making the simulation program at LabVIEW, even to realizing it to the actual conveyor.
Open source software implementation in peer assessment
Authors: Setemen K , Dewi L J E , Purnamawan I K
Published: June 2020

The objective of the research was to implement the Open Source Software in learning assessment. The assessment was a peer assessment. The peer assessment used iPeer 3.4 software, widely known as open source software. The iPeer 3.4 is a web based software, therefore it can be accessed anywhere through various existing devices. iPeer 3.4 was implemented in the course with two different groups of students, and survey was conducted on the assessment and the process of the assessment. The software has undergone the usability testing using System Usability Scale (SUS) developed by John Brook in 1986. The result of the test showed that the score for the software was ‘B’ and rated as ‘good’. It indicated that the iPeer 3.4 was suitable software for peer assessment.
Application of mind mapping learning method to improve learning outcomes of grade 10 students of information and communication technology at SMK Wira Harapan, Bali, Indonesia
Authors: Hariyanti  , Indrawan G , Dantes G R , Divayana D G H
Published: June 2020

The student-centered learning method is in line with the attitude of teachers and students who must be responsive in following and mastering the development of science and technology. This study aims to determine the effect of mind mapping learning methods on students’ understanding of concepts. The population in this study was Grade 10 Information and Communication Technology in Odd Semester 2019/2010 at SMK Wira Harapan, Bali, Indonesia. The samples in this study were 35 students. Data analysis was conducted using Paired T-Test Sample Test. The results showed that the application of the mind mapping learning method was able to increase the value of the learning outcomes of Computer System subjects from mean 76 to 87. With a 95% confidence level the results showed that this method was positively and significantly correlated with 47% student learning outcomes. The mind mapping learning method needs to be applied to subjects, which require more understanding based on logic understanding. Efforts to increase learning outcomes must also pay attention to the characteristics of students and other factors.
Optimization of artificial neural networks to improve accuracy of vocational competence selection of vocational school students using nguyen-widrow
Authors: Christyaditama I G P , Candiasa I M , Gunadi I G A
Published: June 2020

The present study used Neural Network Backpropagation combined with Nguyen-Widrow to optimize the disadvantages of ANN causes, which is the difficulty in initializing initial weights. The test was conducted on a dataset of values in semesters 1 and 2. The test results show that the best performance in training model of artificial neural networks with Nguyen-widrow is the smallest average MSE error of 0.002 and the highest average accuracy of 96.38%. Training on artificial neural network model training data with Nguyen-widrow has the smallest MSE error, 0.000996 and the highest accuracy is 97.49% on architecture ANN 9-9.1 with training function parameters: traingdx, epoch: 1000, learning rate: 0.1, and error: 0.001. The best performance was also seen in testing the testing of artificial neural network models with Nguyen-widrow with the smallest average error-MSE of 0.026 and the highest average accuracy of 87.85%. Training data testing on artificial neural network models with Nguyen-widrow has the smallest error-MSE which is 0.004436 and the highest accuracy is 94.50% on architecture ANN 9-9.1 with training function parameters: traingdx, epoch: 1000, learning rate: 0.1, and error: 0.001. The artificial neural network model with Nguyen-widrow has an accuracy difference of 8.53% smaller than the artificial neural network model with an accuracy difference of 9.28%. It can be concluded that the Artificial Neural Network with Nguyen-Widrow can overcome the ANN problem in determining initial weights so that it gives an increase in the accuracy of the prediction of students’ competency selection better than the Artificial Neural Network without Nguyen-Widrow.
Environmental Rehabilitation of Volga-Akhtuba Floodplain
Authors: Kalinin V V , Loboyko V F , Solovyova O A , Likhomanova M A , Ovcharova A Y , Loboyko A V
Published: June 2020

The research considers the water bodies of the Volga-Akhtuba floodplain requiring an optimal hydrological regime, aimed at preserving floodplain oak groves, soil fertility, spawning sites and at the development of the territory agricultural potential. New solutions are presented, aimed at complex approach to floodplain territory rehabilitation, at minimization of floodplain degradation and at its restoration, instead of traditional hydro-mechanized work on cleaning tracts, eriks and lakes of the floodplain. A phased restoration of the floodplain natural state and creation of balanced ecosystem with an operating self-purification mechanism are planned as a result of the proposed measures being implemented. These measures enable to increase the acreage of irrigated lands for vegetable crops by accumulating spring flood waters in the water bodies of Volga-Akhtuba floodplain.
An asymptotic and empirical smoothing parameters selection method for smoothing spline ANOVA models in large samples
Authors: Sun Xiaoxiao , Zhong Wenxuan , Ma Ping
Published: June 2020

Large samples are generated routinely from various sources. Classic statistical models, such as smoothing spline ANOVA models, are not well equipped to analyse such large samples because of high computational costs. In particular, the daunting computational cost of selecting smoothing parameters renders smoothing spline ANOVA models impractical. In this article, we develop an asympirical, i.e., asymptotic and empirical, smoothing parameters selection method for smoothing spline ANOVA models in large samples. The idea of our approach is to use asymptotic analysis to show that the optimal smoothing parameter is a polynomial function of the sample size and an unknown constant. The unknown constant is then estimated through empirical subsample extrapolation. The proposed method significantly reduces the computational burden of selecting smoothing parameters in high-dimensional and large samples. We show that smoothing parameters chosen by the proposed method tend to the optimal smoothing parameters that minimize a specific risk function. In addition, the estimator based on the proposed smoothing parameters achieves the optimal convergence rate. Extensive simulation studies demonstrate the numerical advantage of the proposed method over competing methods in terms of relative efficacy and running time. In an application to molecular dynamics data containing nearly one million observations, the proposed method has the best prediction performance.
Morphology, anatomy, phylogenetics and distribution of fossil and extant Trochodendraceae in the Northern Hemisphere
Authors: Manchester Steven R , Kvaček Zlatko , Judd Walter S
Published: June 2020

We present the oldest known occurrences of crown-group Trochodendraceae based on new material from the Palaeocene of Wyoming, USA. Two genera are recognized, Trochodendron and Eotrochion gen. nov. The fossil fruit of Trochodendron infernense sp. nov. is represented by a pedicellate, apically dehiscent capsular fruit composed of nine follicle-like units, each bearing a persistent convex style. The basal part is ornamented with numerous raised stamen scars. From the same deposits, Eotrochion is represented by infructescences, fruits and associated leaves. The infructescences are racemes of numerous apically dehiscent capsules, each with c. 14–16 styles, each with an underlying nectary and receptacles lacking stamen scars, but possessing a prominent perianth scar. A phylogenetic assessment of the modern species, plus representatives of four extinct genera of fossil Trochodendraceae based on available morphological characters, yields a favoured topology of Trochodendron(Eotrochion(Concavistylon kvacekii(C. wehrii (Pentacentron, Tetracentron)))). A parsimony analysis of currently available characters indicates that C. wehrii renders Concavistylon non-monophyletic. Accordingly, we transfer it to Paraconcavistylon gen. nov., characterized by pendent, rather than erect infructescences. We also reconsider the extinct Nordenskioeldia (Late Cretaceous to Miocene), the prior placement of which in Trochodendraceae has been challenged, and we consider it to fall outside the crown group of the family.
Stability-Indicating RP-HPLC and CE Methods for Simultaneous Determination of Bisoprolol and Perindopril in Pharmaceutical Formulation: A Comparative Study
Authors: Hassan Said A , Nashat Nancy W , Elghobashy Mohamed R , Abbas Samah S , Moustafa Azza A
Published: June 2020

Two fast, accurate and selective stability-indicating methods were developed and validated for the simultaneous determination of bisoprolol, perindopril and three of their possible degradation products. The first proposed method was a gradient reversed phase-high-performance liquid chromatography (HPLC) method, whereas the second was a capillary electrophoresis method. The structures of the obtained degradation products were elucidated using infrared and mass spectrometry. They were also confirmed to be either a drug impurity in the British Pharmacopoeia or a precursor to such impurity. The linearity for bisoprolol and perindopril was achieved in the range of 1–20 μg mL−1 and 5–30 μg mL−1 for HPLC and capillary electrophoresis methods, respectively. The proposed methods were validated according to the International Conference on Harmonisation guidelines. The HPLC method proved to be more sensitive and succeeded in the quantitative determination of the obtained degradation products. Also, it was able to quantify perindopril impurity up to three times lower than the desired limit set by the British Pharmacopoeia. They were successfully employed in the determination of bisoprolol and perindopril in their combined pharmaceutical formulation.