bluuebunny/crossref_metadata_2025 huggingface dataset:
Integrative taxonomy reveals multiple lineages of the spider genus Cybaeus endemic to the Ryukyu Islands, Japan (Arachnida : Araneae : Cybaeidae)
Authors: Ihara Yoh , Koike Naoki , Nakano Takafumi
Published: February 2021

The epigean spiders of the genus Cybaeus L. Koch, 1868 are known to have diversified in western North America and the Japanese Archipelago. To date, ~80 species of Cybaeus are known from Japan, but they have not previously been recorded from the Ryukyu Islands that harbour a diversity of endemic species. Here we describe eight new species of Cybaeus from the Ryukyu Islands, extending the range of Cybaeus southward to the central Ryukyus. Both sexes of each of the new species are described, and their phylogenetic relationships are estimated using nuclear and mitochondrial gene markers. Although Cybaeus okumurai, sp. nov. and C. kumadori, sp. nov. possess genital features that are common in the other Japanese congeners, the other six species (C. yakushimensis, sp. nov., C. kodama, sp. nov., C. amamiensis, sp. nov., C. aikana, sp. nov., C. tokunoshimensis, sp. nov., and C. hikidai, sp. nov.) are characterised by an elongated embolus and tubular spermathecae. These unique genital characteristics and the phylogeny recovered here suggest that these features evolved independently among the Japanese and Ryukyu Cybaeus species. Phylogenetic analyses highlight an unusual biogeographical pattern in which C. yakushimensis and C. kodama endemic to Yakushima Island in the northern Ryukyus are related to species distributed in the central Ryukyus. In contrast, our phylogeny suggests that C. okumurai from Tanegashima Island in the northern Ryukyus is sister to C. ashikitaensis (Komatsu, 1968), distributed in Kyushu of the Japanese Archipelago. The retreat constructs and sympatric distribution of Cybaeus found among the Ryukyus are also briefly discussed.
ZooBank: urn:lsid:zoobank.org:pub:640D15AA-17F4-48EE-88B4-485CFF8FCD60
Concentrations of the endocannabinoid N-arachidonoylethanolamine in the follicular fluid of women with endometriosis: the role of M1 polarised macrophages
Authors: Fonseca Bruno M. , Moreira-Pinto Beatriz , Costa Lia , Felgueira Eduarda , Oliveira Pedro , Rebelo Irene
Published: February 2021

Although N-arachidonoylethanolamine (AEA; also known as anandamide) is present in human follicular fluid (FF), its regulation remains unknown. Therefore, the aims of the present study were to: (1) investigate the relationships between FF AEA concentrations in women undergoing assisted reproductive technology and their age, body mass index, ART characteristics and fertility treatment outcomes; and (2) assess how different inflammatory patterns may trigger AEA production by human granulosa cells (hGCs). FF AEA concentrations were higher in women undergoing IVF than in those undergoing intracytoplasmic sperm injection group. FF AEA median concentrations were lower in women undergoing ART because of male factor infertility than in women with endometriosis (1.6 vs 2.5nM respectively), but not women with tubal, hormonal or unexplained infertility (1.6, 2.4 and 1.9nM respectively). To evaluate the effects of macrophages on AEA production by hGCs, hGCs were cocultured with monocyte-derived macrophages. The conditioned medium from M1 polarised macrophages increased AEA production by hGCs. This was accompanied by an increase in AEA-metabolising enzymes, particularly N-acyl phosphatidylethanolamine-specific phospholipase D. The results of the present study show that high FF AEA concentrations in patients with endometriosis may be associated with the recruitment of inflammatory chemokines within the ovary, which together may contribute to the decreased reproductive potential of women with endometriosis. Collectively, these findings add a new player to the hormone and cytokine networks that regulate fertility in women.
A critical role of the soybean evening complex in the control of photoperiod sensitivity and adaptation
Authors: Bu Tiantian , Lu Sijia , Wang Kai , Dong Lidong , Li Shilin , Xie Qiguang , Xu Xiaodong , Cheng Qun , Chen Liyu , Fang Chao , Li Haiyang , Liu Baohui , Weller James L. , Kong Fanjiang
Published: February 2021

Significance

In many plant species, the timing of flowering is sensitive to photoperiod. In many crop species, genetic variation in this sensitivity is critical for adaptation to specific regions and management practices. This study identifies a component of the genetic pathway controlling flowering time in soybean, a legume crop of major global importance. Notably, plants lacking this component flower extremely late. Photoperiod sensitivity in plants, including soybean, was first systematically described in a seminal paper 100 y ago, and the results presented here establish an important new molecular step underlying this response. This step is a critical control point that could be genetically adjusted to engineer photoperiod sensitivity for yield improvement across a broad range of locations and agricultural contexts.
Changing personality traits with the help of a digital personality change intervention
Authors: Stieger Mirjam , Flückiger Christoph , Rüegger Dominik , Kowatsch Tobias , Roberts Brent W. , Allemand Mathias
Published: February 2021

Significance

Personality traits have consequences and are malleable throughout the lifespan. However, it is unclear if and how personality traits can be changed in desired directions. A 3-mo digital personality change intervention was deployed, and a large-scale randomized controlled trial (n= 1,523) was conducted to examine the effects of intended personality change in a nonclinical sample. The intervention group showed greater changes than the control group, and changes aligned with intended goals for change. Observers also perceived personality changes, but reported changes were less pronounced. Moreover, self- and observer-reported changes persisted until 3 mo after the end of the intervention. These findings provide the strongest evidence to date that normal personality traits can be changed through intervention in nonclinical samples.
Reduced proinsecticide activation by cytochrome P450 confers coumaphos resistance in the major bee parasite
Varroa destructor
Authors: Vlogiannitis Spyridon , Mavridis Konstantinos , Dermauw Wannes , Snoeck Simon , Katsavou Evangelia , Morou Evangelia , Harizanis Paschalis , Swevers Luc , Hemingway Janet , Feyereisen René , Van Leeuwen Thomas , Vontas John
Published: February 2021

Significance

Honey bees pollinate the majority of crops, but their survival is under threat. The bee parasitic mite
Varroa destructor
is a major cause of honey bee decline. The successful control of
Varroa
mites depends on a small number of in-hive acaricides. Species-specific activation of the chemical coumaphos is a powerful “pro-drug” approach to attain this selective toxicity and protect bees. We identified a coumaphos-resistant
Varroa
population that escapes toxicity by down-regulating the activating enzyme, a P450 monooxygenase. Decreased activation is a rare but evolutionarily powerful solution to achieve resistance. It demonstrates that the current proinsecticide approach is under threat, as it can be circumvented, and highlights the need to restart the pipeline to develop selective pest control agents.
Gender assignment strategies and L1 effects in the elicited production of mixed Spanish-Basque DPs
Authors: Munarriz-Ibarrola Amaia , Ezeizabarrena Maria-José , Arrazola Varun DC , Parafita Couto M. Carmen
Published: February 2021

This paper investigates the strategies involved in gender assignment in Spanish-Basque mixed Determiner Phrases
(DPs) with a gendered Spanish determiner (el
M /la
F) and a Basque ungendered noun. Previous studies on Spanish-Basque mixed DPs
have revealed conflicting results regarding the determining factor affecting gender assignment, namely, phonological ending vs.
analogical gender. We designed a forced-switch elicitation task in order to elicit mixed DPs with a Spanish determiner and a
Basque noun (controlled for both phonological vs. analogical cues). Thirty highly proficient Spanish-Basque bilinguals with
different profiles and socio­linguistic backgrounds participated in the study. Three cues were significant in the selection of the
Spanish M/F determiner: the analogical gender and two phonological cues, the word ending and the root ending of the Basque noun.
Further statistical analyses revealed participants’ L1 as a strong factor in the variability attested: bilinguals with Spanish as
(one of) their L1(s) rely predominantly on the analogical criterion, whereas speakers with only Basque as L1 follow mainly the
phonological criterion. Overall, this study provides an explanation for the previous conflicting results and highlights the fact
that bilinguals may use different strategies depending on their bilingual profile and the morpho-phonological properties of the
languages in contact.
Completion of neuronal remodeling prompts myelination along developing motor axon branches
Authors: Wang Mengzhe , Kleele Tatjana , Xiao Yan , Plucinska Gabriela , Avramopoulos Petros , Engelhardt Stefan , Schwab Markus H. , Kneussel Matthias , Czopka Tim , Sherman Diane L. , Brophy Peter J. , Misgeld Thomas , Brill Monika S.
Published: February 2021

Neuronal remodeling and myelination are two fundamental processes during neurodevelopment. How they influence each other remains largely unknown, even though their coordinated execution is critical for circuit function and often disrupted in neuropsychiatric disorders. It is unclear whether myelination stabilizes axon branches during remodeling or whether ongoing remodeling delays myelination. By modulating synaptic transmission, cytoskeletal dynamics, and axonal transport in mouse motor axons, we show that local axon remodeling delays myelination onset and node formation. Conversely, glial differentiation does not determine the outcome of axon remodeling. Delayed myelination is not due to a limited supply of structural components of the axon–glial unit but rather is triggered by increased transport of signaling factors that initiate myelination, such as neuregulin. Further, transport of promyelinating signals is regulated via local cytoskeletal maturation related to activity-dependent competition. Our study reveals an axon branch–specific fine-tuning mechanism that locally coordinates axon remodeling and myelination.
Brd4 regulates NLRC4 inflammasome activation by facilitating IRF8-mediated transcription of Naips
Authors: Dong Xingchen , Hu Xiangming , Bao Yan , Li Guo , Yang Xiao-dong , Slauch James M. , Chen Lin-Feng
Published: February 2021

NLRC4 inflammasome activation and the subsequent maturation of IL-1β and IL-18 are critical for protection against infection by bacterial pathogens. The epigenetic regulator Brd4 has emerged as a key player in inflammation by regulating the expression of inflammatory cytokines. However, whether Brd4 has any role in inflammasome activation remains undetermined. Here, we demonstrated that Brd4 is an important regulator of NLRC4 inflammasome activation in response to Salmonella typhimurium infection. Brd4-deficient bone marrow–derived macrophages (BMDMs) displayed impaired caspase-1 activation, ASC oligomerization, IL-1β maturation, gasdermin-D cleavage, and pyroptosis in response to S. typhimurium infection. RNA sequencing and RT-PCR results revealed that the transcription of Naips was decreased in Brd4-deficient BMDMs. Brd4 formed a complex with IRF8/PU.1 and bound to the IRF8 and PU.1 binding motifs on the promoters of Naips to maintain the expression of Naips. Furthermore, myeloid lineage–specific Brd4 conditional knockout mice were more susceptible to S. typhimurium infection with increased mortality, bacterial loads, and tissue damage; impaired inflammasome-dependent cytokine production; and pyroptosis. Our studies identify a novel function of Brd4 in innate immunity by controlling inflammasome-mediated cytokine release and pyroptosis to effectively battle S. typhimurium infection.
GTP-dependent formation of straight tubulin oligomers leads to microtubule nucleation
Authors: Ayukawa Rie , Iwata Seigo , Imai Hiroshi , Kamimura Shinji , Hayashi Masahito , Ngo Kien Xuan , Minoura Itsushi , Uchimura Seiichi , Makino Tsukasa , Shirouzu Mikako , Shigematsu Hideki , Sekimoto Ken , Gigant Benoît , Muto Etsuko
Published: February 2021

Nucleation of microtubules (MTs) is essential for cellular activities, but its mechanism is unknown because of the difficulty involved in capturing rare stochastic events in the early stage of polymerization. Here, combining rapid flush negative stain electron microscopy (EM) and kinetic analysis, we demonstrate that the formation of straight oligomers of critical size is essential for nucleation. Both GDP and GTP tubulin form single-stranded oligomers with a broad range of curvatures, but upon nucleation, the curvature distribution of GTP oligomers is shifted to produce a minor population of straight oligomers. With tubulin having the Y222F mutation in the β subunit, the proportion of straight oligomers increases and nucleation accelerates. Our results support a model in which GTP binding generates a minor population of straight oligomers compatible with lateral association and further growth to MTs. This study suggests that cellular factors involved in nucleation promote it via stabilization of straight oligomers.
Natural history of MZ B cells
Authors: Nemazee David
Published: February 2021

In this issue, Tull et al. (https://doi.org/10.1084/jem.20202001) and Kibler et al. (https://doi.org/10.1084/jem.20201952) track human marginal zone B cell development from early progenitors to the memory compartment, addressing changes in age and autoimmunity, the sequence of development in the gut-associated lymphoid tissue, and clonal sharing among memory cells.
Detection of Ca2+ transients near ryanodine receptors by targeting fluorescent Ca2+ sensors to the triad
Authors: Sanchez Colline , Berthier Christine , Tourneur Yves , Monteiro Laloé , Allard Bruno , Csernoch Laszlo , Jacquemond Vincent
Published: February 2021

In intact muscle fibers, functional properties of ryanodine receptor (RYR)–mediated sarcoplasmic reticulum (SR) Ca2+ release triggered by activation of the voltage sensor CaV1.1 have so far essentially been addressed with diffusible Ca2+-sensitive dyes. Here, we used a domain (T306) of the protein triadin to target the Ca2+-sensitive probe GCaMP6f to the junctional SR membrane, in the immediate vicinity of RYR channels, within the triad region. Fluorescence of untargeted GCaMP6f was distributed throughout the muscle fibers and experienced large Ca2+-dependent changes, with obvious kinetic delays, upon application of voltage-clamp depolarizing pulses. Conversely, T306-GCaMP6f localized to the triad and generated Ca2+-dependent fluorescence transients of lower amplitude and faster kinetics for low and intermediate levels of Ca2+ release than those of untargeted GCaMP6f. By contrast, model simulation of the spatial gradients of Ca2+ following Ca2+ release predicted limited kinetic differences under the assumptions that the two probes were present at the same concentration and suffered from identical kinetic limitations. At the spatial level, T306-GCaMP6f transients within distinct regions of a same fiber yielded a uniform time course, even at low levels of Ca2+ release activation. Similar observations were made using GCaMP6f fused to the γ1 auxiliary subunit of CaV1.1. Despite the probe's limitations, our results point out the remarkable synchronicity of voltage-dependent Ca2+ release activation and termination among individual triads and highlight the potential of the approach to visualize activation or closure of single groups of RYR channels. We anticipate targeting of improved Ca2+ sensors to the triad will provide illuminating insights into physiological normal RYR function and its dysfunction under stress or pathological conditions.
Making sound visible—a simple schlieren imaging setup for schools
Authors: Veith Sonja Isabel , Friege Gunnar
Published: February 2021

Sound is an interesting topic for physics lessons at all ages. However, it is difficult to illustrate this ubiquitous phenomenon and many models do not adequately represent the properties of sound and thus promote unwanted conceptions. The experiment presented here avoids this by visualising sound itself with the help of the schlieren technique. For this purpose, an easily reproducible variant of a schlieren setup is presented. The simple setup is described in detail.
The discrepancies in different facets of MgB2 bulk superconductors prepared under various sintering durations by spark plasma sintering
Authors: Zhang J Y , Zhang Y F , Lou Z W , Zhang P H , Li C Y , Yuan J W , Peng L , Ma Y X , Noudem J G , Izumi M
Published: February 2021

Seven MgB2 bulk superconductors with good superconductivity and crystallinity were prepared under the pressure of 50 MPa at 950 °C and different sintering durations (15 ∼ 240 min) by spark plasma sintering (SPS), with the onset critical temperature (T
c,onset) around 37.5 K. The superconducting properties and microstructure measured from the facets perpendicular (PeF) and parallel (PaF) to the compression direction of the SPSed MgB2 bulk samples were also analyzed to investigate the effect of the sintering duration on the MgB2 bulks and the discrepancy between the PeF and the PaF. The optimum performance was obtained from the sample prepared for 45 min for both facets, and the critical current density (J
c) measured from the PeF and the PaF are 364 kA cm−2 and 344 kA cm−2 in self field at 20 K, respectively. The PeF exhibits better Jc
performance than the PaF at low fields and the PaF exhibits better J
c performance than the PeF at high fields. It can be concluded that the sintering duration affects the properties of the PeF mainly by changing their crystallite size. While for the PaF, the sintering duration mainly affects the microstructural defects, such as cracks, pores and secondary phase particles, thus further affecting their J
c performances. In terms of the flux pinning mechanism of the SPSed MgB2 bulk samples, the PaF is less susceptible to sintering duration than the PeF, and the better J
c performance of the PaF at high fields is due to the stronger grain boundary pinning. It can be also found that the point pinning being stronger at higher temperature is the result of the decreasing anisotropy of MgB2 bulk samples with the temperature.
Improving reliability of power supply of mineral-raw-material complex
Authors: Minakova T E
Published: February 2021

The problem of ensuring the reliability of the main equipment of enterprises of the mineral and raw materials complex is considered. The significant influence of automatic control means on the automatic power supply system (object of study) on the efficiency of mining enterprises is shown. Achieving the goal of improving uninterrupted power supply for the operation of electrical installations of the mining complex is ensured by solving the problem of reducing the time of disconnection of damaged areas and transient processes. For this, an algorithm has been developed that uses a set of signs of emergency situations: values of voltages, currents, states of relay protection actuators and automation. In addition, the integration of automatic power supply control and relay protection based on the concept of smart power supply networks of a mining enterprise has been proposed. A sign of identification of the type of emergency mode was by the level of voltage reduction on the buses of the switchgear, control of the actuation of relay protection devices that disconnect equipment in emergency mode, autoreclosing, underfrequency load shedding, automatic reserve entry. MATLAB/Simulink simulated the operation of electrical equipment of the power supply system in accordance with the known method of relay protection and automation, as well as using the proposed algorithm for identifying emergency modes and restoring voltage after disconnection of the damaged area.
Digital technologies in modeling and design of mining excavators
Authors: Shibanov D A , Ivanov S L , Shishkin P V
Published: February 2021

Development and application of digital technologies at the stage of new model design is highly relevant. Manufacture of a testbed vehicle and its full-scale pilot testing is impossible for Russian manufacturers of mining excavators due to a high cost of a prototype and a lack of special testing grounds. In order to reduce the risks of machine builders as vehicle manufacturer and those of MPPs as users of the prototype excavator, it is necessary to introduce and develop the digital twin technology at the stage of designing new models. A general reference point in development of the digital twin of a mining excavator is minimizing human input. Due to integration of works by stages of creation of the digital twin in a form of an information diagnostic system, there is a possibility to manage the life cycle of the product and optimize MRO with accounts of actual conditions and operating modes.
Improving useful life of assembled cutting tools by designing a modified flank geometry in indexable cutting inserts
Authors: Mikhailov S , Kovelenov N
Published: February 2021

An innovative approach is proposed to increase the useful life of assembled cutting tools by designing a special shape of the flank surface of indexable faceted cutting inserts (IFCIs). Calculation relationships were developed as a way to define the nature and degree of effect of blade geometry on the flank wear rate. The paper describes specifics of designing the optimal flank shape for roughing and finishing operations. Curved (convex) flank geometry is confirmed to effectively increase the tool life before reaching the maximum allowed flank wear land. An important factor for choosing the insert flank geometry and dimensions is the strength of the cutting blade of the insert. To maximize tool life with regard to the insert strength, a CAD method is developed for geometry calculation and optimization of the complex-profile flank surface. IFCI design examples featuring modified flank geometry offer improved tool life. Complex flank shape comprising a series of elementary surfaces with different geometry, is shown to be highly efficient. The results of field tests for new IFCIs in milling operations confirm the great practical value of methods for controlling the tool wear behavior through modified flank geometry.
Time-Frequency Feature-Based Underwater Target Detection with Deep Neural Network in Shallow Sea
Authors: Zheng Yunliang , Gong Qiyong , Zhang Shufang
Published: February 2021

In this paper, we propose a time-frequency feature-based signal detection method with deep neural network and apply it for target detection in shallow sea. The short time Fourier transform is employed to capture the time-frequency feature of the target signal. We input the time-frequency diagram of the signal into the deep neural network model, train the network model through the labeled data samples, and use the test set to estimate the signal detection probability. In addition, we analyze the influence of different learning rates on the detection performance. The experimental results show that the performance of the proposed method is better than that of the energy detector, and the detection performance of different learning rates is different.
A Novel Approach of Intermittent Demand Prediction in Industrial Domain
Authors: Hu Xiaolei , Zhang Xue , Zhang Dai
Published: February 2021

Intermittent demand, one of the categories of unusual demand, such as demand of spare parts of industry equipment management, seasonal and short life cycle products, is characterized by infrequent demand arrivals and variable demand sizes, which is difficult to predict. To solve this problem, a novel approach was proposed in this paper to predict intermittent demand. It provided mechanism to forecast demand arrival time with demand values at the same time when demand occurs. It firstly applied Decision Tree to predict a 0-1 binary values of demand arrival time. Meanwhile Neural Network was built to predict demand values. Then the time points of these two results were matched. The demand values for those moments when predicted demand that did not occur were replaced by zero. Finally we applied this approach to predict sparse demand of products, the results showed that the predicting accuracy was superior to traditional Back-propagation Neural Network through comparison.
Heterotrophic Bacteria from the Digestive Tract of Rice Field Eel (Monopterus albus) and Its Potency as Probiotic
Authors: Faturrahman  , Khair W H , Andini A S
Published: February 2021

Normal microbiota in the gastrointestinal tract has a mutual relationship with its host. This research aimed to know the morphological diversity of heterotrophic bacteria that live in the gastrointestinal tract of rice field eel and its potency as probiotic. Bacterial isolation has been done by cultivated of the sample in the nutrient agar medium and then observed colonies and cell morphology. Candidate probiotics of isolates were selected based on the capability of starch, protein and lipid hydrolysis, bacterial resistance to acidity and bacterial resistance to antibiotics. The result of this research showed there are 10 isolates and have various colonies’ morphological appearance. All of those isolates consist of 40% cocci, 30% small rod and each 10% long rod, streptococci, and spiral. As many as 8 isolates were gram-positive and 2 isolates was gram-negative. The motility test showed 70% of isolates were motile and 30 % non-motile. The results of casein hydrolysis, starch, and fate indicate that 70% of isolates were able to obtain Hydrolyze casein, that 60% of isolates were able to hydrolyze starch and that none of the isolates were able to obtain hydrolyzed fats. All of the probiotic candidates who were tested in isolation are resistant to all antibiotics tested. Thus, it said that not all discoveries meet the criteria as potential candidates.
Development of 3D Animation Based Hydrocarbon Learning Media
Authors: Zakir Supratman , Maiyana Efmi , Nur Khomarudin Agus , Novita Rina , Deurama Mayuti
Published: February 2021

The learning process of chemistry on the hydrocarbon compound material taught by the teacher currently uses 2D-based media (blackboard). Actually, there is nothing wrong with using this blackboard for teachers in teaching, but there are some materials that need to be explained more concretely through direct media or IT-based media. In addition, students also do not understand the learning being taught because there are no facilities for practice so that students still use their imagination in practical learning. From the information obtained through interviews with chemistry teachers, the teacher’s desire to make IT-based media is very high, but they are constrained by the ability to design it. The research method used is the 4D version of Research and Development (RnD) (Define, Design, Develop, Disseminate). The results showed that the products produced were valid, practical, and effective for use as a medium in learning hydrocarbons with the respective values of validity, practicality and effectiveness were 0.83, 0.92, and 0.94.
Web-based e-learning Application for learning Arabic language
Authors: Zubaidah  , kardena Absharini , Shalihah Siti , Hodijah Ooh , Afrida Yeni , Safitri Loli
Published: February 2021

In today’s digital era, there are still many lecturers who conduct face-to-face meeting using the lecture strategy and using projectors and/or laptops as learning media. This educational model, although using multi-media, still has shortcomings because the interactions that occur during the educational process are limited on two-way interactions between lecturers and students. Learning tends to focus on the lecturer. In addition, learning faces obstacles when lecturers have to leave class because of other jobs outside the city or outside the island and even abroad. This traditional learning model also does not give students the opportunity to learn freely and independently. By considering this fact, the development of an ICT-based education system in a broader sense is urgently needed. It aims to overcome various problems and learning limitations. E-Learning system is an alternative solution to various problems. One of the e-Learning systems which based on computer technology is the use of website. The use of Website in the learning process provides opportunities for students to access learning material at any time and repeatedly so that the students can improve their mastery of learning material. Thus, the presence of lecturers is optional or even non-existent. This is because the parties who take on the role of lecturers are computers, electronic guides designed by content writers, e-Learning Designers, and computer programmers. This article offers website-based learning for Arabic language education study programs that can be used as a substitute for face-to-face learning (online learning).
Development of Learning Media for Android-Based Budget Accounting
Authors: Husrizal Syah Dedy , Muda Iskandar , Elidawati  , Abu Bakar Erwin
Published: February 2021

The purpose of this paper is to develop learning media for Android-based Budget Accounting; and testing the feasibility of learning media developed based on validation or assessment from media experts and students. Media feasibility validation was conducted by the learning technology lecturer and was tested on 50 students at the Accounting Study Program of one of the campuses in North Sumatera. In broad outline, the results of the validation of the media from the material and media aspects were classified as Very Feasible (VF) that is 89.06% and 89.88%, as well as the results of the validation of student trials from aspects of validity of concept, material preparation and implementation potential are Very Feasible (VF), that is 85.12%, 87.90% and 81.55%. The learning media products that are produced are files in the android package (apk) format.
The Role of ICT-Based Metacognition Against the Capabilities of Student Statistics in the Industrial Age 4.0
Authors: Rusmini  , Irawan Saragih Doni , Sari Wahyuni Harahap Fitrah , Fitri Yulia
Published: February 2021

The ability of statistics is the knowledge base of statistical reasoning and statistical thinking. The ability of Statistics can be improved by increasing the role of student metacognition. In the industrial era 4.0, one way to optimize students’ metacognition skills is to get used to solving complex problems with ICT-based. Optimal statistical ability will contribute to the habit of self to work systematically and scientifically. So that this attitude is a capital for students facing the Industrial era 4.0. The method used is a qualitative method. In the Intervention applying statistics learning by developing ICT-based statistics module to increase the role of metacognition in improving the statistical abilities of students of Medan Potensi Utama University. Samples, taken as many as two classes, namely the control class and randomized experiment. Based on the results of the first trial in the field, the results show that the ability of metacognition has a significant effect on the ability of student statistics. student statistics. Students also show a positive response to ICT-based learning in the classroom.
The Factor Analysis of Online Learning Barriers on Learning Evaluation Course During Covid 19 Pandemic
Authors: Syafril  , Novrianti
Published: February 2021

In covid 19 pandemic, since march UNP through UNP rector circular letter no 1593/UN35/AK/2020 obligates the practise of online learning using UNP platform. This decision surely becomes one barrier for some parties in the term of practise. Lecturer readiness in preparing the design of right message for online learning is main point. Even though the socialization related to the design of message in online learning has been long implemented, but it is not fully practised, it becomes particular burden for lecturer. This barrier can be seen from the utilization of synchronous which is not utilized yet, as result some of lecturer are still practising e-learning like face to face lecture i.e same time lecture. It emerges barrier for students. Based on the result of analysis done from the shared questionnaire, the dominant barriers perceived by the students is the readiness of material which is minimum which are available on e-learning, such as e-book, e-module, and the right recommended of e-resources. One thing that must be prepared by university in preparing digital material from various courses is motivating the lecturer to produce the sources of digital (Shurygin, V. Y., &Krasnova, L. A. (2016)). Network aspect and technical problems is aspect which is improvement in the institution which is compulsory to be able to do fast improvement in line with 4,0 revolution era which require the high adoption level on e-resources digital literacy.
Students’ Morphological Errors in Using Word Formation in Writing an Essay
Authors: Dyuli Adha Annisha , Dania Rahma
Published: February 2021

This research was aimed to find out students’ morphological errors in using word formation in writing an essay. Word formation that was found in the students’ writing are derivation and inflection. The type of this research was descriptive qualitative research. The source of data was the English Department students of Universitas Putra Indonesia Yayasan Perguruan Tinggi Komputer ( UPI YPTK) Padang who were in the fourth semester that consist of 23 students. The data were gotten through writing test. The finding of this research showed that the students made morphological errors in using derivation and inflection in writing the essay. Errors in derivation were 10 data, while errors in inflection were 83 data. Based on those findings, the students still made errors in using word formation in their writing.
Guttmann scale Method for Analyze Emotional Intelligence and Speaking Achievement Between Students’
Authors: Wulan Sari Adek , Roza Veni
Published: February 2021

The research was done because there is a significant factor in supporting language learning and academic achievement. That factor was emotional intelligence. Additionally, in language learning process, social. and personal skills are. necessary. As a result, the researcher needed to find and to search about emotional intelligence of the. students. and their speaking achievement. This research was conducted in SMKN 1 Baso at the tenth grade in academic.years of 2019/2020. This research. was a correlational research .as its design. The instruments of this .research were questionnaire .for measuring emotional intelligence and documentation for collecting speaking score of the students. It was all of the tenth grade students of SMKN 1 Baso as the population which consists of 7 classes. The sample was 47 students taken by purposive sampling technique. After that, the researcher has .used Pearson .Product Moment Correlation .Coefficient to search and to find the correlation. between two variables. The researcher.has gotten that the coefficient .of relationship .between. Emotional intelligence of the students and their speaking achievement was 0.48. Based on the result of the research, it can be concluded that emotional intelligence has positive contribution in speaking achievement. The meaning of positive symbol was if the students were intelligent in emotional, they also became intelligent in speaking.
Designing E-Training Computer Assisted Instruction Used to Pedagogic Competency in Vocational Education
Authors: Syahmaidi Eril , Hidayat Hendra , Hartanto Suryo , Fitri Rahmadani Ade
Published: February 2021

This study aims to make the syntax of e-training models valid, practical, and effective on pedagogical competencies. Computer-based training is an e-training model that suits students’ desires in developing pedagogical competencies to get quality graduates. The research method used is Research and Development by conducting expert validity tests with Focus Group Discussion (FGD) and limited trials of the e-training model. The results of this study are formed in the syntax of the e-training model which consists of; (1) Preparation Phase includes Planning, Training Program, and Training Program Preparation; (2) Implementation Phase including E-Training, Face-to-Face, Discussion, Demonstration; (3) The evaluation phase includes Input, Process, Output, and Impact. Finally, implementing the e-training model can help prospective educators prepare to enter into vocational teacher candidates. The results are expected to meet the needs of vocational teacher candidates who have pedagogical competencies that influence the vocational students’ influence.
Indonesian Course in Covid-19 Pandemic Period With A Line Application System
Authors: Deswalantri
Published: February 2021

Indonesian language lectures during the Covid-19 pandemic experienced many obstacles and conveniences that were not obtained during face-to-face lectures. The convenience includes that students are not bothered with attendance, which begins with a lecture contract, which becomes one of the assessments. Students are more flexible in communicating with peers and lecturers without being limited by time and place. Recovery often takes place beyond a predetermined time limit. Obstacles that were found, such as the frequently missing internet signal, arose, especially for students who lived far away near hills or mountains and ate a large quota. But students still miss face-to-face lectures.
The Evaluation of Online Learning in Micro Teaching Course in Tarbiyah and Teacher Training Faculty IAIN Bukittinggi
Authors: Iswantir M , Sesmiarni Zulfani
Published: February 2021

This research is based on the existence of Covid 19 Outbreak, which forced face-to-face learning process changes into online. The change of lecture model from offline to online demands the mastery of technology. The evaluation model of online learning in micro teaching courses used Kirkpatrick evaluation model, which use four evaluation steps; reaction, learning, behavior, and result. The limitation of research problem was evaluation of online learning program in micro teaching course. The formulation of problem was how big the degree of additional and change of students’ knowledge after following online learning in micro teaching course. The aims of research was how big the degree of online learning in micro teaching course. The kind of research was evaluation research used Kirkpatrick evaluation model by using 4 evaluation steps; reaction, learning, behavior and result. The population was students who take micro teaching courses total of 575. Sampling techniques was accidental sampling, 450 people. The technique of data gathering used questionnaire by analyzing data using quantitative non-statistical analysis. The result of research are (1) 40,56 % students mentioned they were satisfied to the implementation of online micro teaching, (2) 32,1 % students stated there is increasing of the additional of knowledge, skill and change of students’ attitude after following micro teaching. (3) 49,33% students tell there is quite increasing on the change of students’ behavior after returning to their circle, and (4) 40,65 % impact on the change of work behavior to students’ work productivity after following online micro teaching.
Academic Writing Learning Model in Higher Education Based on Hybrid Learning
Authors: Widyartono Didin
Published: February 2021

Abstract – Students must have academic writing competencies in order to express scientific ideas and attitudes through scientific papers. Therefore, learning activities are needed according to the times. Various information and communication technology devices can be used to access learning resources and materials. Learning activities can be presented by utilizing information and communication technology devices, including implementing online learning. Hybrid learning presents a variety of learning materials by utilizing the advantages of face to face meetings and online learning. The purpose of this study is to produce an academic writing learning model based on hybrid learning. The method used is development with the following research procedures: design, production, and product testing. The results were obtained by academic writing learning models in higher education based on hybrid learning.
Meta-assessment of student’s renewable energy projects
Authors: Nasrudin D , Setiawan A , Rusdiana D
Published: February 2021

The success of students in doing projects is determined through assessment. Lecturers make rubrics by the assignments given to students. Are arranged tasks and rubrics able to measure what is being measured? This paper aims to uncover the results of a meta-assessment of student projects on renewable energy. The method used is a systematic meta-analysis that is confirmed by self-evaluation, peer reviewers, and expert opinions on lesson plans, implementation, and evaluation. The results showed that the lesson plan that had been prepared was good, only needed improvement in the teaching materials. At the implementation stage, field monitoring and a daily journal are required. While in the evaluation aspect, the rubric that is used is still not enough to express all the categories and abilities displayed by students. Muti-method assessment is needed to measure student competencies and skills that are more holistic.
The Effectiveness of Cooperative Learning Model in the Type of Numbered Heads Together (NHT) Assisted with Picture Puzzle Media on Self-Efficacy and Student Learning Outcomes in the Coordination System Material
Authors: Sri Puji Retno A. , Khoiri Nur , Ihda Norra Bunga
Published: February 2021

The purpose of this study was to determine the effectiveness of cooperative learning model in the type of Numbered Heads Together (NHT) assisted with picture puzzle Media on self-efficacy and student learning outcomes. The research design used was quasi experimental design in the form of nonequivalent control group design. The sample of this study was class XI in SMA Al Islam Wirosari which was taken by non-probability sampling with the number of 77 students. The data were analyzed by using independent sample t-test, based on the result shows that: (1) The student’s self-efficacy score obtained t-count (3.890)> (5% = 1.665), then Ho is rejected and Ha Furthermore. The t-test results on students learning outcomes obtained t-count (3,357)> (5% = 1,665 ), then Ho is rejected and Ha is accepted. (2) Based on the results of the N-Gain test the self-efficacy score of the experimental class was 0.3 and included in the middle category, the control class was 0, 1 was included in the low category, while the N-Gain test result of students learning outcomes in the experimental class were 0.506 and it included in the middle category, in the control class of 0, 285, it included in the low category. This study concluded that the Numbered Heads Together (NHT) in cooperative learning model assisted with picture puzzle media is effective in self-efficacy and student learning outcomes in the coordination system material.
An Analysis of Questioning Skill in Elementary School Pre-service Teachers Based on Bloom’s Taxonomy
Authors: Rahmatih A N , Indraswati D , Gunawan G , Widodo A , Maulyda M A , Erfan M
Published: February 2021

Questioning is an important skill for students which reflects their critical thinking skills. It is also an indicator of creative thinking and even metacognition abilities. This study used Bloom’s Taxonomy to analyze students’ questioning skills. The purpose of this study was to look at the level of student questioning skills based on Bloom’s Taxonomy criteria. The number of questions classified in the factual category was 50% of the 114 questions made. Questions included in the conceptual category were 35%, the procedural category was 5%, while questions included in the metacognitive category were 10%. The conclusions are: (1) The quality of questions made by PGSD students is mostly in the factual cognitive category that requires answers with a low cognitive level; (2) Most questions are at the cognitive level of analyzing; (3) the ability of the research subject in converting information to questions is still at the basic level and the initial skills of HOTS (Higher Order Thinking Skills).
The effectiveness of the Predict Observe Explain (POE) Method and Time Token Arends for Students’ Concepts Understanding in The Social Studies Subject
Authors: Indraswati D , Gunawan G , Nursaptini N , Widodo A , Sutisna D
Published: February 2021

This study aims to determine the effectiveness of predict observe explain (POE) learning methods and time token Arends on the ability to understand concepts of elementary school students in social studies subjects. This research is a quasi-experimental research with pretest-posttest control group design. The population of this study were 40 students of class IV SDN 4 Cakranegara. Simple random sampling technique was used to determine the treatment class. Class IVa was treated with the time token Arends method and class IVb was treated with the predict observe explain (POE) method. The students were tested with 10 pretest questions and 10 posttest questions. Data analysis was performed using the normality test, homogeneity test, normalized gain, paired t-test, independent t-test, and the MANOVA test. The significance level used is 0.05. The results showed that the use of the POE method and time token Arends is not effective in increasing the concept understanding for grade IV students of SDN 4 Cakaranegara in social studies subjects.
Information Technology Factors Affecting Supply Chain Collaboration in Automotive Component Manufacturing in Indonesia
Authors: Gumilang Dicky
Published: February 2021

There is a growing need for collaborative supply chain management. This collaboration has been attracting the researchers due to their critical impact to improve business value. The use of information technology (IT) which is presently widely used in almost areas of business and engineering is considered prerequisites of today’s complex supply chain. Current study shows that a broad array of references in supply chain collaboration especially in identifying influencing factors on Information Technology are partial and limited. This study was aimed at reviewing a comprehensive understanding of dominant IT factors that influence successful supply chain management. Based on thorough analysis on the state of the art literature review, a proposed construct of influencing IT factors in supply chain collaboration is offered. Multiple linear regression technique is used to model the proposed construct. The result of analysis suggests that a further research on identifying factors and determining samples is required to model accuracy.
Statistical Analysis Relationship Between Behavior of Millenial Parents With Game Addictions in Children
Authors: Latubessy Anastasya
Published: February 2021

Game addiction has been declared as one of the mental disorders by WHO. According to research conducted by first author in previous studies stated that there is a negative correlation between the learning process of children with game addiction. This causes anxiety for parents. Today, technology that is developing rapidly is one of the challenges for parents, especially millennial parents. On the other hand, millennial parents also often use gadgets or play games on these gadgets. The parenting style applied by millennial parents to children can also affect children’s growth and development. Indirectly the child will follow what the parents do. The current research, analyzes the relationship between millennial parents’ care for game addiction in children. This study consisted of two variables, namely the millennial parent’s behavior and game addiction, each of which has aspects that are translated into a questionnaire. This study uses a qualitative approach. The method of correlation test analysis using Pearson Product Moment with the help of SPSS. The study concluded that, there was a relationship between behavior of millennial parents and game addiction in children. The relationship that occurs is a significant positive correlation where, the higher the behavior style of millennial parents, the higher the game addiction in children. With the correlation coefficient between the parental millennial behavior and game addiction in children amounting to 0.366 with sig. = 0.023 (p <0.05).