bluuebunny/crossref_metadata_2025 huggingface dataset:
Cross shelf gradients of scleractinian corals in the Spermonde Islands, South Sulawesi, Indonesia
Authors: YUSUF SYAFYUDIN , BEGER MARIA , Tassakka Asmi Citra Malina A.R. , DE BRAUWER MAARTEN , PRICELLA AMANDA , RAHMI RAHMI , UMAR WIDYASTUTI , LIMMON GINO V. , MOORE ABIGAIL MARY , Jompa Jamaluddin
Published: March 2021

Abstract. Yusuf S, Beger M, Tassakka ACMAR, Brauwer MD, Pricella A, Rahmi, Umar W, Limmon GV, Moore AM, Jompa J. 2021. Cross shelf gradients of scleractinian corals in the Spermonde Islands, South Sulawesi, Indonesia. Biodiversitas 22: 1415-1423. Coral reef ecosystems around the world have suffered extensive degradation, including the reefs of the Wallacea region within the Coral Triangle global biodiversity hotspot. Anthropogenic and natural threats can reduce the level of coral reef biodiversity differentially across environmental or impact gradients. The purpose of this study was to evaluate the changes in hard coral (Scleractinia) diversity and community structure across an inshore-offshore zonation gradient in the Spermonde Islands, South Sulawesi, Indonesia. Data on coral colony species and abundance as well as live coral cover were collected from 10 m2 belt transects at a depth of 6 to 8 m. A total of 72 transects were placed around the 12 island stations in three zones: the inner mid-shelf zone, outer mid-shelf zone and outer shelf zone. Data were analyzed to determine the species richness, and three ecological indices for the hard coral communities were calculated: the Shannon Diversity Index (H'), Similarity Index (E), and Dominance Index (C). A total of 310 hard coral species belonging to 62 genera were recorded. The coral communities were dominated by the genera Fungia, Montipora and Porites, and coral cover was in the 'moderate' category. The number of species was directly proportional to the number of colonies within each zone. Live coral cover was higher in the inner mid-shelf zone and outer shelf zone than the outer mid-shelf zone; conversely, the species richness and coral colony abundance were higher in the outer mid-shelf zone. However, the differences were not statistically significant. The indices H’, C, and E did not differ significantly between the zones. However, Tambakulu Island in Zone 4 had the lowest values of E and H’ and the highest value of C. Findings suggest that most-hard coral communities in the cross-shelf zones of the Spermonde Islands are stable communities characterized by relatively high diversity and low dominance indices.
Screening of endophytic fungi from oil palm (Elaeis guineensis) in producing exopolysaccharides
Authors: Yurnaliza Yurnaliza , Jamilah It , Hartanto Adrian , Lutfia Anisa
Published: March 2021

Abstract. Yurnaliza Y, Jamilah I, Hartanto A, Lutfia A. 2021. Screening of endophytic fungi from oil palm (Elaeis guineensis) in producing exopolysaccharides. Biodiversitas 22: 1467-1473. Exopolysaccharides (EPS) are microbial polysaccharides with a high biotechnological application in many fields due to their bioactivity and biocompatibility. Endophytic fungi are potential agents for producing EPS even though they remained under-exploited, especially those originating as indigenous strains from oil palm (Elaeis guineensis Jacq.). The present study reports on EPS production by a collection of endophytic fungi isolated from the petioles of oil palm under submerged fermentation. The culture medium was formulated with sucrose as C-source to trigger the secretion of EPS by the strains. Isolation of EPS was done through absolute ethanol precipitation in cold conditions. A total of 29 endophytic fungal strains was recovered from the foliar part of the plants. Molecular identification based on ITS-rDNA region and phylogenetic construction of each lineage revealed the dominant species from Pestalotiopsidaceae (syn. Amphisphaeriaceae), followed by Hypoxylaceae, Pleosporaceae, Didymosphaeriaceae, Sporocadaceae, and other minor families. In general, most isolates were ascomycetous fungi along with a basidiomycetous and zygomycetous fungus. After fermentation for 10 days, three fungal endophytes identified as Annulohypoxylon thailandicum P8 (Hypoxylaceae), Pseudopestalotiopsis simitheae P1 (Pestalotiopsidaceae), and Diaporthe eucalyptorum P11 (Diaporthaceae) secreted EPS higher in values than the others. The most prominent strain was A. thailandicum P8 with a yield of >50 mg/100 mL of filtrate solution. Based on FT-IR spectral analysis, the EPS product was detected to contain carboxyl, carbonyl, glycosidic bonds, and hydroxyl groups hereafter confirmed the characteristics of exopolysaccharides. The results demonstrated that the EPS may be evaluated for its bioactivity in a future study.
Estimation of Above Ground Biomass and carbon stocks of Tectona grandis and Gmelina arborea stands in Gorontalo Province, Indonesia
Authors: RUSLIM YOSEP , Sandalayuk Daud , Kristiningrum Rochadi , Alam Andi Sahri
Published: March 2021

Abstract. Ruslim Y, Sandalayuk D, Kristiningrum R, Alam AS. 2021. Estimation of Above Ground Biomass and carbon stocks of Tectona grandis and Gmelina arborea stand in Gorontalo Province, Indonesia. Biodiversitas 22: 1497-1508. Plantation forest plays an important role to fulfill timber needs, while more recently plantation forest is increasingly acknowledged to sequester and store carbon which can mitigate climate change and also as carbon sequestration for the environment. This study aimed to calculate the stand potential, stand biomass and carbon stocks of teak (Tectona grandis) and gmelina (Gmelina arborea) stands in the context of land after being abandoned in Gorontalo Province, Indonesia. Four plots with size of one hectare each were sampled in which each species (i.e. teak and gmelina) consisted of two plots. In each plot, the diameter at the breast-high (1.3 m) and the height of each individual were recorded. Data analysis included growth parameters of the stands (i.e., Mean Annual Increment/MAI and Current Annual Increment/CAI) and above-ground biomass and carbon sequestered by the stands. Simple linear regression using polynomial trendline was used to determine the relationship between variables and the degree of the relationship. The results showed that the maximum growth of teak stands at Plots I and II reached a maximum point at the age of 32 and 25 years with the total volume of 307.50 and 254.81 m3ha-1, respectively. While the maximum growth of gmelina stands at Plots I and II reached a maximum point at the age of 15 years with the total volume of 190.54 and 251.80 m3ha-1, respectively. The biomass content in teak stands at Plots I and II and gmelina stands at Plots I and II were respectively 267.83; 221.94; 104.03 and 137.48 tons ha-1. Meanwhile, the carbon content in teak stands at Plots I and II and gmelina stands at Plots I and II were respectively 125.88; 104.31; 48.90; and 64.62 tons ha-1. The results of the regression analysis suggest that there was strong relationship between carbon sequestered and the age of the stands as well as total basal area. The results of this study suggest that Tectona grandis is more potential to be developed as plantation forest than Gmelina arborea when aiming at carbon sequestration and biomass production.
Morphological evaluation and determination keys of 21 citrus genotypes at seedling stage
Authors: Budiarto Rahmat , Poerwanto Roedhy , Santosa Edi , Efendi Darda
Published: March 2021

Abstract. Budiarto R, Poerwanto R, Santosa E, Efendi D. 2021. Morphological evaluation and determination keys of 21 citrus genotypes at seedling stage. Biodiversitas 22: 1570-1579. The identification of citrus varieties is generally based on flower, fruit, and mature tree characters. The detailed and comprehensive identification of seedling stage is very limited, therefore present study aimed to identify and distinguish 21 citrus genotypes based on 50 morphological characters of vegetative shoot at seedling stage. Cluster analysis using complete linkage agglomerative method showed broader dissimilarities between C. x limon and C. x microcarpa. Unfortunately, this method was limited to differentiate six genotypes within Citrus reticulata Blanco due to extremely low dissimilarities found. All citrus seedlings have similarities in the forms of habitus, gland spots, arrangement and venation of leaf. The result of PCA determined petiole wing, spine, color, hair and fragrance of leaves as five morphological markers at seedling stage. In addition, there was a positive correlation between spine and leaf pleasant. Moreover, the details of morphological dissimilarities between genotypes were described in arranged determination keys.
Temporal of reef fish communities in the coastal water of Krueng Raya, Aceh Besar Regency, Indonesia
Authors: Ulfah Maria , Fajri Siti N. , Nasir Muhammad , Agustina Sri , Purnawan Syahrul
Published: March 2021

Krueng Raya waters have a big potency on coral reef fish; However, there was no study was conducted to document this biodiversity. This data are crucial for the conservation plan. Therefore, the objective of the study was to examine the community structure of reef fish in the Krueng Raya coastal waters, Mesjid Raya Subdistrict, Aceh Besar, Indonesia. The sampling was conducted from January 2014 to December  2016. The data were collected at three stations by the Visual Census method with a depth of 3-4 meters. The research found the average amount of reef fish was 1743 individuals that were consisted of 93 species and comprised of 26 families. The Families dominating were Pomacentridae, Acanthuridae, Chaetodontidae, and Labridae. The distribution level of reef fish individually was influenced by the environmental conditions of the coral reef ecosystem. The severe condition of the coral ecosystem in the Krueng Raya coastal waters was caused by two factors. Firstly, fishing activities of the locals and tourists who deliberately stepping on the coral colonies and using unfriendly tools to catch the fish (speargun). Another factor was the occurrence of coral bleaching in 2016, of which almost 80% of the coral ecosystem in the Krueng Raya coastal waters was exposed to this phenomenon (bleaching).Keywords: Reef Fish, Acanthurida,  Communities Structure, Krueng Raya
Temporal sex ratio, growth patterns and condition factor of the blue swimming crab (Portunus pelagicus) in Northern of Tiworo Strait waters, Southeast Sulawesi, Indonesia
Authors: Astuti Oce , Alimina Naslina , Safilu Safilu , Emiyarti Emiyarti , Sara La , Nurgayah Wa , Rahmadani Ani , Skel Ira
Published: March 2021

Blue swimming crabs Portunus pelagicus occupied Tiworo Strait waters has been experiencing heavy pressure due to high exploitation and damaging its habitat caused by conversion to be a port or jetty particularly in the intertidal and subtidal zones closed to mangrove areas and river mouth. Those zones constitute main habitats of BSCs. The study aimed to analyze temporal sex ratio (SR), growth patterns and condition factor (CF) of BSCs in Tiworo Strait waters which was conducted in June–December 2018. The BSC samples were taken monthly using collapsible pot. Each sample taken was identified its sex, measured its CW and weighed its BW. Monthly SR of male and female was counted, while BW–CW relationship was analyzed using a simple linear regression. Growth patterns and CF were derived and analyzed from BW–CW regression. The results of study showed that monthly BSC SR of male and female showed females preponderated over males, except in November. The growth pattern of male and female was negative allometric (b 3). Data of BSCs CF were mostly influenced by growth coefficient (b), namely the higher b the lower CF. This condition is frequent happening in BSC population dominated by juvenile and mature stages. This study showed most BSCs found in this location were juvenile which indicated as their nursery ground in the intertidal zone dominated by sand substrate closed to mangrove forest.
Pola pertumbuhan dan faktor kondisi ikan sembilang (Potosus canius) di Teluk Bintan Kepulauan Riau
Authors: Yulianto Tri , Atmadja Wiwin Kusuma , Zulpikar Zulpikar , Ariska Risma , Suryanti Ani
Published: March 2021

One of the economically important fish included in the Plotosidae family is the Sembilang Fish. This study aims to determine the growth patterns and condition factors of the Sembilang fish. The research was conducted in July 2018. The locations of the Sembilang Fish sampling station include Dompak Island Bay, Bugis Village Bay, Madong Bay, Pengujan Bay and Tanjung Uban. The total sample of Sembilang Fish that has been obtained is 150, consisting of 80 males and 70 females. Total length ranges from 19.7-66 cm, with weights ranging from 33.68-960 g. The mode of distribution of the frequency of the fish caught during the study was in the second class interval, namely 25.7-30.7. The relationship between the length and weight of male Sembilang fish is W = 0, 0268L2,5378 and the female is W = 0, 00542L2,3347. The growth pattern of Sembilang fish, both male and female, is negative allometric which shows the length growth is faster than the weight. Fish condition factors obtained during the study ranged from 0.723 to 1.166.Keywords:BintanCondition FactorLength-weight-relationshipPlotosus caniusSembilang fish ABSTRAKSalah satu ikan ekonomis penting yang termasuk dalam famili Plotosidae adalah Ikan Sembilang. Penelitian ini bertujuan untuk mengetahui pola pertumbuhan dan faktor kondisi ikan sembilang. Penelitian dilaksanakan pada bulan Juli 2018. Lokasi stasiun pengambilan sampel Ikan Sembilang diantaranya Teluk Pulau Dompak, Teluk Kampung Bugis, Teluk Madong, Teluk Pengujan dan Tanjung Uban. Total sampel Ikan Sembilang berjumlah 150 ekor, terdiri dari 80 ekor jantan dan 70 ekor betina. Ukuran panjang total berkisar antara 19,7-66 cm, dengan berat berkisar antara 33,68-960 g. Modus distribusi frekuensi ikan sembilang yang tertangkap selama penelitian ada pada selang kelas kedua yaitu 25,7-30,7. Hubungan panjang dan bobot Ikan Sembilang jantan adalah W = 0, 0268L2,5378 dan betina adalah W = 0, 00542L2,3347. Pola pertumbuhan Ikan Sembilang baik jantan maupun betina adalah alometrik negatif yang memperlihatkan pertumbuhan panjang lebih cepat daripada bobotnya. Faktor kondisi ikan selama penelitian nilainya berkisar antara 0,723 hingga 1,166.Kata kunci: BintanFaktor kondisiHubungan panjang-bobotPlotosus caniusIkan Sembilang
Epidemiological and clinical features in patients with coronavirus disease 2019 outside of Wuhan, China: Special focus in asymptomatic patients
Authors: Liu Ping , Niu Ruichao , Chen Jie , Tang Yuling , Tang Wenfang , Xu Linyan , Feng Juntao
Published: March 2021

Objectives

In December 2019, coronavirus disease 2019 (COVID-19) emerged in Wuhan City and rapidly spread across the world. The clinical characteristics of affected patients in different regions and populations may differ. Thus, this study aimed to identify the characteristics of the disease to provide an insight about the prevention and treatment of COVID-19.

Methods

Data on the demographic characteristics and clinical findings of the patients admitted at the First Hospital of Changsha from January 1, 2020 to February 10, 2020 were assessed.

Results

In this study, there were 8 (3.8%) asymptomatic, 21 (10.0%) mild upper respiratory tract infection (URTI), and 180 (86.1%) pneumonia cases. In total, 47 (22.5%) patients resided in Wuhan, and 45 (21.5%) had recently traveled to Wuhan before disease onset. Moreover, 19 (9.1%) had contact with people from Wuhan, and 69 (33.0%) were family cluster cases. The median incubation period was approximately 6.3 (range: 1.0–20.0) days. Fever and cough were the most common initial symptoms: 99 (49.3%) patients presented with fever, without cough; 59 (29.4%) with cough, without fever; and 33 (16.4%) with both fever and cough.

Conclusion

The symptoms of patients with COVID-19 were relatively mild outside Wuhan, and family cluster was a remarkable epidemic characteristic. Special attention should be paid to asymptomatic patients.
Ethnic disparities in COVID-19 mortality in Mexico: A cross-sectional study based on national data
Authors: Ibarra-Nava Ismael , Flores-Rodriguez Kathia G. , Ruiz-Herrera Violeta , Ochoa-Bayona Hilda C. , Salinas-Zertuche Alfonso , Padilla-Orozco Magaly , Salazar-Montalvo Raul G.
Published: March 2021

Introduction

Across the world, the COVID-19 pandemic has disproportionately affected racial and ethnic minorities. How ethnicity affects Indigenous peoples in Mexico is unclear. The aim of this cross-sectional study was to determine the mortality associated with ethnicity, particularly of Indigenous peoples, in a large sample of patients with COVID-19 in Mexico.

Methods

We used open access data from the Mexican Ministry of Health, which includes data of all confirmed COVID-19 cases in the country. We used descriptive statistics to compare differences among different groups of patients. Logistic regression was used to calculate odds ratios while adjusting for confounders.

Results

From February 28 to August 3, 2020, a total of 416546 adult patients were diagnosed with COVID-19. Among these, 4178 were Indigenous peoples. Among all patients with COVID-19, whether hospitalized or not, a higher proportion of Indigenous peoples died compared to non-Indigenous people (16.5% vs 11.1%, respectively). Among hospitalized patients, a higher proportion of Indigenous peoples died (37.1%) compared to non-Indigenous peoples (36.3%). Deaths outside the hospital were also higher among Indigenous peoples (3.7% vs 1.7%). A higher proportion of Indigenous peoples died in both the private and public health care sectors. The adjusted odds ratio for COVID-19 mortality among Indigenous peoples with COVID-19 was 1.13 (95% confidence interval 1.03 to 1.24). The adjusted odds ratio for COVID-19 mortality among Indigenous peoples with COVID-19 was higher among those who received only ambulatory care (1.55, 95% confidence interval 1.24 to 1.92).

Discussion

In this large sample of patients with COVID-19, the findings suggest that Indigenous peoples in Mexico have a higher risk of death from COVID-19, especially outside the hospital. These findings suggest Indigenous peoples lack access to care more so than non-Indigenous people during the COVID-19 pandemic in Mexico.
Prevalence of COVID-19 in adolescents and youth compared with older adults in states experiencing surges
Authors: Rumain Barbara , Schneiderman Moshe , Geliebter Allan
Published: March 2021

Purpose

There has been considerable controversy regarding susceptibility of adolescents (10–19 years) and youth (15–24 years) to COVID-19. However, a number of studies have reported that adolescents are significantly less susceptible than older adults. Summer 2020 provided an opportunity to examine data on prevalence since after months of lockdowns, with the easing of restrictions, people were mingling, leading to surges in cases.

Methods

We examined data from Departments of Health websites in six U.S. states experiencing surges in cases to determine prevalence of COVID-19, and two prevalence-related measures, in adolescents and youth as compared to older adults. The two other measures related to prevalence were: (Percentage of cases observed in a given age group) ÷ (percentage of cases expected based on population demographics); and percentage deviation, or [(% observed—% expected)/ % expected] x 100.

Results

Prevalence of COVID-19 for adolescents and for youth was significantly greater than for older adults (p < .00001), as was percentage observed ÷ percentage expected (p < .005). The percentage deviation was significantly greater in adolescents/youth than in older adults (p < 0.00001) when there was an excess of observed cases over what was expected, and significantly less when observed cases were fewer than expected (p< 0.00001).

Conclusions

Our results are contrary to previous findings that adolescents are less susceptible than older adults. Possible reasons for the findings are suggested, and we note that public health messaging targeting adolescents and youth might be helpful in curbing the pandemic. Also, the findings of the potential for high transmission among adolescents and youth, should be factored into decisions regarding school reopening.
A CT radiomics analysis of COVID-19-related ground-glass opacities and consolidation: Is it valuable in a differential diagnosis with other atypical pneumonias?
Authors: Gülbay Mutlu , Özbay Bahadır Orkun , Mendi Bökebatur Ahmet Raşit , Baştuğ Aliye , Bodur Hürrem
Published: March 2021

Purpose

To evaluate the discrimination of parenchymal lesions between COVID-19 and other atypical pneumonia (AP) by using only radiomics features.

Methods

In this retrospective study, 301 pneumonic lesions (150 ground-glass opacity [GGO], 52 crazy paving [CP], 99 consolidation) obtained from nonenhanced thorax CT scans of 74 AP (46 male and 28 female; 48.25±13.67 years) and 60 COVID-19 (39 male and 21 female; 48.01±20.38 years) patients were segmented manually by two independent radiologists, and Location, Size, Shape, and First- and Second-order radiomics features were calculated.

Results

Multiple parameters showed significant differences between AP and COVID-19-related GGOs and consolidations, although only the Range parameter was significantly different for CPs. Models developed by using the Bayesian information criterion (BIC) for the whole group of GGO and consolidation lesions predicted COVID-19 consolidation and AP GGO lesions with low accuracy (46.1% and 60.8%, respectively). Thus, instead of subjective classification, lesions were reclassified according to their skewness into positive skewness group (PSG, 78 AP and 71 COVID-19 lesions) and negative skewness group (NSG, 56 AP and 44 COVID-19 lesions), and group-specific models were created. The best AUC, accuracy, sensitivity, and specificity were respectively 0.774, 75.8%, 74.6%, and 76.9% among the PSG models and 0.907, 83%, 79.5%, and 85.7% for the NSG models. The best PSG model was also better at predicting NSG lesions smaller than 3 mL. Using an algorithm, 80% of COVID-19 and 81.1% of AP patients were correctly predicted.

Conclusion

During periods of increasing AP, radiomics parameters may provide valuable data for the differential diagnosis of COVID-19.
Leaf ethanolic extract of Etlingera hemesphaerica Blume mitigates defects in fetal anatomy and endochondral ossification due to mercuric chloride during the post-implantation period in Mus musculus
Authors: Ruyani Aceng , Kartika Eda , Parlindungan Deni , Putra Riza Julian , Sundaryono Agus , Susanta Agus
Published: March 2021

This study aimed to investigate the effectiveness of leaf ethanolic extract ofEtlingera hemisphaerica(LE3H) in reducing defects in fetal anatomy and endochondral ossification in mice induced by HgCl2during the post-implantation period. Pregnant mice were divided into four groups, each consisting of 10 dams, and received drink and foodad libitum. The first group was administered LE3H (E1), the second one HgCl2(E2), the third one HgCl2+LE3H (E3), and the fourth was control (E0), administered double-distilled water only. HgCl2(5 mg/kg bw) was administrated by injection intraperitoneally on gestation day (GD)9 and LE3H (0.39 mg/g bw) was administered by gavage on GD10. The treated and control animals were killed by cervical dislocation on GD18, dissected, and the morphologically normal living fetuses (MNLF) were collected. The MNLF of E0, E1, E2, and E3 from 5 dams were fixed with Bouin solution, and observed using the free hand razor blade technique for soft tissue examination. The remaining MNLF were fixed with 96% ethanol, and then stained with Alizarin Red S and Alcian Blue for ossification examination. Index of length of ossified part (ILOP) of humerus, index of width of ossified part (IWOP) of humerus, ILOP of femur, and IWOP of femur were calculated. E2 had higher cases of anatomical defects (74,6%) than E3 (48.9%), E1 (15.0%), and E0 (0%). E2 had humerus IWOP of 0.82±0.03, which was significantly lower than that of E0 (0.89±0.04) and E1 (0.89±0.03), while that of E1 and E0 was not significantly different from each other. Meanwhile, IWOP in E3 (0.88±0.03) was significantly higher than that in E2, but not different from that in E1 and E0. Thus, LE3H mitigated defects in fetal anatomy and endochondral ossification induced by HgCl2in mice.
Infodemics: Do healthcare professionals detect corona-related false news stories better than students?
Authors: Grüner Sven , Krüger Felix
Published: March 2021

False news stories cause welfare losses and fatal health consequences. To limit its dissemination, it is essential to know what determines the ability to distinguish between true and false news stories. In our experimental study, we present subjects corona-related stories taken from the media from various categories (e.g. social isolation, economic consequences, direct health consequences, and strong exaggeration). The subject’s task is to evaluate the stories as true or false. Besides students with and without healthcare background, we recruit healthcare professionals to increase the external validity of our study. Our main findings are: (i) Healthcare professionals perform similar to students in correctly distinguishing between true and false news stories. (ii) The propensity to engage in analytical thinking and actively open-minded thinking is positively associated with the ability to distinguish between true and false. (iii) We find that the residence of the subjects (East- or West-Germany) plays only a minor role. (iv) If news stories are in line with existing narratives, subjects tend to think that the stories are true.
Epigenome wide association study of response to methotrexate in early rheumatoid arthritis patients
Authors: Gosselt Helen R. , Vallerga Costanza L. , Mandaviya Pooja R. , Lubberts Erik , Hazes Johanna M. W. , de Jonge Robert , Heil Sandra G.
Published: March 2021

Aim

To identify differentially methylated positions (DMPs) and regions (DMRs) that predict response to Methotrexate (MTX) in early rheumatoid arthritis (RA) patients.

Materials and methods

DNA from baseline peripheral blood mononuclear cells was extracted from 72 RA patients. DNA methylation, quantified using the Infinium MethylationEPIC, was assessed in relation to response to MTX (combination) therapy over the first 3 months.

Results

Baseline DMPs associated with response were identified; including hits previously described in RA. Additionally, 1309 DMR regions were observed. However, none of these findings were genome-wide significant. Likewise, no specific pathways were related to response, nor could we replicate associations with previously identified DMPs.

Conclusion

No baseline genome-wide significant differences were identified as biomarker for MTX (combination) therapy response; hence meta-analyses are required.
A CLSTM and transfer learning based CFDAMA strategy in satellite communication networks
Authors: He Qiang , Xiang Zheng , Ren Peng
Published: March 2021

With the development of the economy and technology, people’s requirement for communication is also increasing. Satellite communication networks have been paid more and more attention because of their broadband service capability and wide coverage. In this paper, we investigate the scheme of convolutional long short term memory (CLSTM) network and transfer learning (TL) based combined free/demand assignment multiple access (CFDAMA) scheme (CFDAMA-CLSTMTL), which is a new multiple access scheme in the satellite communication networks. Generally, there is a delay time T between sending a request from the user to the satellite and receiving a reply from the satellite. So far, the traditional multiple access schemes have not processed the data generated in this period. So, in order to transmit the data in time, we propose a new prediction method CLSTMTL, which can be used to predict the data generated in this period. We introduce the prediction method into the CFDAMA scheme so that it can reduce data accumulation by the way of sending the slots request which is the sum of slots requested by the user and the predicted slots generated in the delay time. A comparison with CFDAMA-PA and CFDAMA-PB is provided through simulation results, which gives the effect of the CFDAMA-CLSTMTL in a satellite communication network.
Validity of the Self-Expression and Emotion Regulation in Art Therapy Scale (SERATS)
Authors: Haeyen Suzanne , Noorthoorn Eric
Published: March 2021

Background

The Self-Expression Emotion Regulation in Art Therapy Scale (SERATS) was developed as art therapy lacked outcome measures that could be used to monitor the specific effects of art therapy. Although the SERATS showed good psychometric properties in earlier studies, it lacked convergent validity and thus construct validity.

Method

To test the convergent validity of the SERATS correlation was examined with the EES (Emotional Expressivity Scale), Emotion Regulation Strategies for Artistic Creative Activities Scale (ERS-ACA) and Healthy-Unhealthy Music Scale (HUMS). Patients diagnosed with a Personality Disorder, and thus having self-regulation and emotion regulation problems (n = 179) and a healthy student population (n = 53) completed the questionnaires (N = 232).

Results

The SERATS showed a high reliability and convergent validity in relation to the ERS-ACA approach strategies and self-development strategies in both patients and students and the HUMS healthy scale, in patients. Hence, what the SERATS measures is highly associated with emotion regulation strategies like acceptance, reappraisal, discharge and problem solving and with improving a sense of self including self-identity, increased self-esteem and improved agency as well as the healthy side of art making. Respondents rated the SERATS as relatively easy to complete compared to the other questionnaires.

Conclusion

The SERATS is a valid, useful and user-friendly tool for monitoring the effect of art therapy that is indicative of making art in a healthy way that serves positive emotion regulation and self-development.
A beszerzés helye és szerepe a Magyarországi kis- és középvállalatoknál (The Role of Purchasing in the Hungarian Small and Medium Enterprises)
Authors: Vörösmarty Gyöngyi , Tátrai Tünde , Havasi Zoltán
Published: March 2021

A kis- és középvállalkozások (kkv-k) a legtöbb országban, így Magyarországon is kiemelt szerepet töltenek be a gazdaság életében. A velük kapcsolatos kutatások elérkeztek abba a fázisba, amikor például a kisvállalkozás- fejlesztés és az ellátásilánc-menedzsment összekapcsolásával megismerhetjük egy adott vállalati funkció szerepét és helyét a célcsoportban. A szerzők tanulmányukban egy kutatás eredményeit mutatják be, mely egyenrangú módon fókuszál a beszerzési tevékenység és a kkv-k sajátosságaira. A beszerzési aspektusok kiemelésével lehetőség van mélyebben megismerni a kkv-k bizonytalanságának forrásait, a beszállítókkal kapcsolatos igényeik megfogalmazását, a vevők preferenciáit, melyen keresztül általános kép kapható a szállítófejlesztés lehetőségeiről, kifejezetten a beszerzési tevékenység informatikai támogatásáról, továbbá véleményükről a beszerzés mint szolgáltatás kiszervezésével kapcsolatban. A kutatást megalapozó kérdőíves felmérés nemzeti összehasonlításra is lehetőséget ad, valamint segíti egy adott tevékenységre fókuszálva a hazai kis- és középvállalkozások helyzetének bemutatását. ______ Small and medium enterprises (SME) play an important role in the economy of Hungary, just like in most other countries. Studies on SMEs recently have focused on the role of a particular company function in the target group by linking the development of SMEs to new advanced options, such as supply chain management. This paper provides an overview of authors’ ques a questionnaire research focusing on the specific characteristics of both purchasing and SMEs. Focusing on the purchasing aspects enables us to gain a deeper knowledge on the main causes of the instability of SMEs as well as on their expectations regarding suppliers and a better understanding on the preferences of the clients. As a result authors can highlight the main options of developing the supply chain as well as the IT support of purchasing and they can state their opinion on the outsourcing of the purchasing as a service. The questionnaire survey providing the basis for the study enables authors to make international comparisons as well as to present the current state of the Hungarian SMEs focusing on a particular business activity.
A Shackletoni krízismenedzsment tanulságai a pénzügyi válság idején
Authors: Müller Helga
Published: March 2021

A szerző Sir Ernest Shackleton Déli-sark-kutató sikertelen, de vezetői szempontból kiemelkedő expedícióinak eseményeit alapul véve mutatja be azokat a természeti válság során eredményes vezetői módszereket, melyek a modern gazdasági válságok idején is követendő példaként állíthatók a felelős vezetők elé. Az emberközpontú vezetés jelentőségére koncentráló munka Shackleton történetét, az egyes területekhez kapcsolódó, jelentős pszichológiai és vezetéselméleti kutatásokat és személyes tapasztalatokat is párhuzamba állítva a vezető érzelmi intelligenciájának fontosságát, a kiválasztást és csoportszervezést, a motivációt, a személyes példát és felelősségvállalást helyezi a fókuszba.
Making the Transition to Virtual Methods in the Literacy Classroom: Reframing Teacher Education Practices
Authors: Stoetzel Lindsay , Shedrow Stephanie
Published: March 2021

In response to the COVID 19 pandemic universities and colleges abruptly closed and teacher educators had little time to move instruction from face-to-face classrooms to digital learning environments. This sudden shift created a myriad of obstacles as instructors worked to retain pedagogically sound and effective instruction digitally—while also preparing novice teachers to teach online themselves. Adding another layer of complexity was prospective teachers’ lack of knowledge and hesitation regarding technology tools, as well as how to meaningfully integrate the tools into their teaching. Facing these challenges, we as literacy teacher educators drew upon effective methods of teacher education, literacy practices and digital literacy to rethink the way we design lessons and assignments for our literacy methods courses. The framework we created for restructuring the integration of technology into courses can be duplicated across disciplines and guide instructors to reconceptualize their use of tech tools to re-envision face-to-face and digital instruction to expand learning outcomes.
Adaptability of quinoa genotypes to altitudes and population densities in Colombia
Authors: Anchico Wilson , Spehar Carlos Roberto , Vilela Michelle Souza
Published: March 2021

This work aimed at evaluating and comparing agronomic characteristics of 15 quinoa (Chenopodium quinoa Willd) genotypes cultivated in two altitudes and sowing densities. The experiment initiated by individual plant selection in Brasília, DF, followed by progeny evaluation in Colombia, at 1,100 m and 1,850 m altitude and population densities of 30 and 12 plants m-1, with row spacing of 0,50 m. Eleven progenies and four commercial cultivars were tested. The progenies were obtained by selecting individuals in BRS Syetetuba based on plant height, grain and dry matter yield, harvest index and 1,000 grain weight. The genotypes with the highest grain yield were BRQ 8 (2,283 kg ha-1), Aurora (2,121 kg ha-1) and BRQ 4 (2,043 kg ha-1). In general, the genotypes had early plant cycle, from emergence to physiological maturity of 100-110 days at high plant density for the two altitudes. It is concluded that exploring variability in progenies originated from natural crosses is effective in the adaptation of quinoa to tropical environments. Moreover, genotypes tested in the Cerrado (Brazilian Savannah) maintain the same response relation when evaluated in Colombia.
Molecular characterization and core collection evaluation of Manihot esculenta Crantz
Authors: Costa Nathalia Almeida , Azêvedo Hellen Sandra Freires da Silva , Silva Luciélio Manoel da , Cunha Elisa Ferreira Moura , Siviero Amauri , Campos Tatiana de
Published: March 2021

Cassava is one of the most important subsistence crops in tropical regions. It is necessary to preserve and to know the genetic diversity existent for the adequate use of genetic resources. The evaluation of genetic diversity among genotypes results in information about potential parents in breeding programs, allows duplicates identification, and facilitates germplasm exchange between research institutions. The objective of this study was to characterize the genetic diversity of cassava accessions of North Brazil region. A total of 106 accessions were analyzed using ten microsatellite markers. The genetic parameters estimated were: expected heterozygosity (HE), observed heterozygosity (HO) and polymorphic information content (PIC). Clustering was performed using the UPGMA and Neighbor-Joining (NJ) method. Bayesian analysis, analysis of principal coordinates and identification of a core collection were also used. The ten loci amplified 8,40 alleles on average. The average heterozygosity estimates were: HE = 0.71, HO = 0.58 and PIC = 0.72. Genetic distances ranged from 0.158 to 0.908.  Six (5,66%) accesses were redundant. Clustering and dispersion analysis didn’t differentiate bitter from sweet cassava, and there wasn’t correlation between groups and collect origin. The core collection consisted of 22 individuals that represented 94% of total allelic diversity and 20,75% of the base collection. The results indicate high dissimilarity between the accessions and allowed the detection of redundant genotypes, showing the use of genetic markers as informative tools for the management of collections.
Canola agronomic performance in three sowing dates in Jataí-GO
Authors: Assis Raissa Macedo , Nery Silva Flavia Andrea , Carneiro Luciana Celeste , Silva Givanildo Zildo da , Cruz Simério Carlos Silva , Machado Carla Gomes
Published: March 2021

Canola (Brassica napus L. var oleifera) is a potential crop due to the growing world demand for vegetable oil. This work aims to evaluate the performance of five canola hybrids in three sowing dates in Jataí-GO. The experiment was conducted in the year of 2017, in a randomized block design, with subdivided plots and four replications. Plots were composed by three sowing dates (03/03, 03/10 and 03/17) and subplots by the canola hybrids Hyola 50, Hyola 61, Hyola 433, Hyola 571CL and Hyola 575CL. Seedling emergence, inicial and final plant population, flowering, maturation, plant height, plant survival index and grain yield were evaluated. The thermal sum calculation was performed with the phenological data. Results were submitted to analysis of variance and means were compared by Scott Knott test at 5% of probability. The plants survival index highlighted Hyola 433, Hyola 571CL and Hyola 575CL hybrids. Grain yield varied according to hybrid and sowing date. In the edaphoclimatic conditions of this study, in the year of 2017, the best agronomic performance was observed in the first sowing date for the canola hybrids Hyola 433 and Hyola 575CL and in the second sowing date for the canola hybrid Hyola 571CL.
Does the residual effect of n-fertilization applied on corn phase maintain forage production of the following pasture phase in an integrated crop-livestock system?
Authors: Bernardon Angela , Soares André Brugnara , Elejalde Denise Adelaide Gomes , Assmann Tangriani Simioni , Zatta Angélica Caroline , Candiotto Lucas
Published: March 2021

Nutrient cycling represents an important nutrient source in the Integrated Crop-Livestock Systems (ICLS). In general, only the crop phase of the ICLS is fertilized, however little is known about this residual effect of nitrogen fertilization from summer crop to succeeding winter pasture. This research aimed to evaluate the forage growth dynamic and botanical composition of a mixed pasture of black oat (Avena strigosa Schreb) and ryegrass (Lolium multiflorum Lam.) affected by two canopy height managements (high and low) and nitrogen fertilization applied to either the summer crop (corn) or winter pasture phase of an ICLS. The experiment was established in 2012 in southern Brazil. Black oat and ryegrass were growing during winter season and corn (Zea mays L.) during summer season, being this paper related to the 2014 pasture period. Treatments were composed by two canopy heights (25 and 10 cm) and two N-Fertilization Times (N-Pasture or N-Corn) of 200 kg of N ha-1. Canopy height was regulated by beef steers grazing through continuous stocking with a variable stocking rate. Forage mass was lower in the 10 cm canopy height on average, however this forage mass was composed by greater proportion of ryegrass leaves and lower proportion of dead material in relation to the treatment with 25 cm canopy height. The N-fertilization applied directly on pasture phase (N-Pasture) increased forage mass, tiller population density, participation of ryegrass and ryegrass leaf proportion in the forage mass. Furthermore, when pasture was fertilized with N, the forage accumulation rate increased about 69%, highlighting that the corn N-fertilization did not present significant effect on forage productivity. The residual effect of corn N-fertilization was not enough to maintain high forage accumulation. Thus, the pasture N-fertilization is fundamental to keep high-productive crop-livestock system.
Tolerance to irrigation water salinity in physalis plants: productive aspects
Authors: Silva Joseano Graciliano da , Lopes Kilson Pinheiro , Oliveira Odair Honorato de , Rodrigues Marília Hortência Batista da Silva , Paiva Francisco Jean da Silva
Published: March 2021

The cultivation of non-traditional fruits has gained ground in the horticulture sector, but which, in certain situations, are plants that require previous studies related to soil adaptability, climate, and irrigation water quality. In this sense, this work aimed to evaluate the effects of irrigation water salinity on Physalis peruviana L. (fisális) plants in the different growth phases. The experimental area was installed on the premises of the Federal University of Campina Grande, adopting a casualized block design, with four saline levels of irrigation water (0.3; 1.2; 2.1 and 3.0 dS m-1) and five repetitions per treatment. The variables analyzed were: stem diameter, plant height and number of leaves every 15 days, leaf area at 55 days after transplanting, number of side branches, number of flower buds, number of flowers, average fruit weight, polar diameter, and equatorial diameter of fruits, number of fruits per plant and productivity. According to the results, the plants were tolerant to saline levels of irrigation water of up to 3.0 dS m-1, without prejudice to the phenological and productive characteristics of the crop. The unitary increase in the salinity of the irrigation water did not result in damage to the physiological characteristics of the plants until the 60 days of transplanting.
Attributes of pedoindicator soils in areas cultivated with typical crops in the Western Amazon, Brazil
Authors: Jordão Half Weinberg Corrêa , Campos Milton César Costa , Mantovanelli Bruno Campos , Frozzi José César , Cunha José Maurício da , Chechi Leonardo , Fonseca Julimar da Silva
Published: March 2021

The crop systems adopted in the Amazônia region have been studied several times in terms of the variability and to indicate the soil attributes more sensitive to the different crops. Thus, the objective of this work was to apply multivariate techniques in order to identify the chemical attributes most sensitive to environmental changes in different crop systems in Western Amazonia, Brazil. The research was conducted in five rural properties located in the Humaitá city region, Western Amazonia, Brazil. There were selected four environments with natural characteristics (Native Forest - NF) and five cropping systems (Grazing, Cassava, Açaí, Agroforestry and Reforestation). In the selected areas, soil samples were collected at depths layers of 0.0-0.05 m; 0.05-0.1 m and 0.1-0.2 m and the following chemical analyzes were performed: pH in water, Ca2+, Mg2+, K +, Resin-P, phosphorus bio-available particulate (Pbp), OC, Al3+, H++Al3+ and from these results SB, T, t, m% and V% were calculated. Multivariate statistical techniques were used to verify similarities between the crop systems in the attempt to relate the crops grown and the chemical attributes. The multivariate analysis was essential in the crop systems distinction, as well as to describe the relationship with the chemical properties. The results demonstrate and reinforce the existing variability between crop systems, with emphasis on the variation in crop systems, compared to natural environments.
Design and Construction of Zana Robot for Modeling Human Player in Rock-paper-scissors Game using Multilayer Perceptron, Radial basis Functions and Markov Algorithms
Authors: Ghasemi Maryam , Roshani Abdolreza , Muhammad Ali Peshawa J. , Nia Farhad F. , Nazemi Ehsan , Roshani Gholam H.
Published: March 2021

In this paper, the implementation of artificial neural networks (multilayer perceptron [MLP] and radial base functions [RBF]) and the upgraded Markov chain model have been studied and performed to identify the human behavior patterns during rock, paper, and scissors game. The main motivation of this research is the design and construction of an intelligent robot with the ability to defeat a human opponent. MATLAB software has been used to implement intelligent algorithms. After implementing the algorithms, their effectiveness in detecting human behavior pattern has been investigated. To ensure the ideal performance of the implemented model, each player played with the desired algorithms in three different stages. The results showed that the percentage of winning computer with MLP and RBF neural networks and upgraded Markov model, on average in men and women is 59%, 76.66%, and 75%, respectively. Obtained results clearly indicate a very good performance of the RBF neural network and the upgraded Markov model in the mental modeling of the human opponent in the game of rock, paper, and scissors. In the end, the designed game has been employed in both hardware and software which include the Zana intelligent robot and a digital version with a graphical user interface design on the stand. To the best knowledge of the authors, the precision of novel presented method for determining human behavior patterns was the highest precision among all of the previous studies.
Formación y regulación profesional de la Psicología en Educación: un desafío a nuestro alcance
Authors: Jiménez Juan E. , Báez Bernardo F.
Published: March 2021

Se presentan las reflexiones sobre tres cuestiones que afectan a la figura del Psicólogo Educativo (PE) relacionadas con sus actividades o competencias profesionales, con la regulación de la profesión, y con su posible integración en el campo de la orientación educativa. Respecto a la definición de sus competencias profesionales, se efectúa especial hincapié en la necesidad de partir de las demandas del propio contexto donde se trabaja y, en especial, cuando se trata de la escuela como escenario altamente institucionalizado. Por ello, se definen algunas de las propiedades del espacio profesional en el que debería enmarcarse la formación y competencias del PE. Se reivindica la necesidad de la regulación de la profesión, del mismo modo que en el caso de la especialidad clínica, y se destaca la necesidad de que de forma paralela se fortalezca la formación básica de los PE, estableciendo menciones u opciones de especialización que capaciten para desempeñar un trabajo de calidad tanto en escenarios educativos formales como informales. Se aboga que el psicólogo que finaliza sus estudios de grado tenga la opción de acceder a la Orientación Educativa a través de un Máster de Psicología de la Educación que oferte dos itinerarios o especialidades. Por un lado, la correspondiente al perfil de Psicólogo Educativo Generalista, que acreditaría a aquellos que quieran ejercer como profesionales más generalistas en el ámbito de la educación, ya sea en gabinetes psicopedagógicos, empresas o en otros ámbitos sociales, y que no necesariamente han de estar registrados como centros sanitarios. Por otro lado, el itinerario o especialidad de Psicología Escolar, que facilitaría al psicólogo el acceso a la Orientación Educativa en el marco de la escuela hasta que se consiga el reconocimiento de la profesión de psicólogo escolar como ocurre en algunos países de la Unión Europea.