bluuebunny/crossref_metadata_2025 huggingface dataset:
Indirekte Steuerung und Stressbewältigung in der Arbeitswelt 4.0
Authors: Maier Edith , Reimer Ulrich , Ulmer Tom
Published: January 2021

Der digitale Wandel führt zu mehr Flexibilisierung, welche sich auch auf das betriebliche Gesundheitsmanagement (BGM) auswirkt. Die Arbeitswelt 4.0 birgt Chancen wie mehr Selbstbestimmung und bessere Vereinbarkeit von Beruf und Familie, aber auch Risiken wie psychische Überlastung und interessierte Selbstgefährdung, besonders in Organisationen mit indirekter Steuerung. Digitale Lösungen können eine wichtige Rolle bei der Stressbewältigung spielen und klassische BGM-Maßnahmen ergänzen.
Integration von ressourcenorientiertem Kosten- und Resilienzmanagement
Authors: Nickel Johannes , Pedell Burkhard
Published: January 2021

Der Beitrag entwickelt einen Bezugsrahmen für die Integration von Kosten- und Resilienzmanagement. Auf Basis von Interviews werden anschließend zentrale Maßnahmen des Resilienzmanagements identifiziert, welche an den Unternehmensressourcen ansetzen, um die Resilienz des Unternehmens durch die Schaffung von Flexibilität und Redundanz zu verbessern. Darauf aufbauend werden schließlich die Wechselwirkungen analysiert, die von Maßnahmen des Kosten- und des Resilienzmanagements ausgelöst werden.
Instandhaltungscontrolling in der digitalen Welt
Authors: Becker Wolfgang , Schuhknecht Felix
Published: January 2021

Die industrielle Fertigung entwickelt sich aufgrund der zunehmenden Digitalisierung stetig weiter. Dies führt für das produktive Anlagevermögen zu einem deutlichen Veränderungsprozess. Auch wirkt sich das auf die Instandhaltung selbst, aber auch auf das Instandhaltungscontrolling aus.
Müssen Medien Haltung zeigen?
Authors: Schiffhauer Mark
Published: January 2021

Im Anschluss stellt Dr. Mark Schiffhauer in seinem Beitrag ein Projekt der Wochenzeitung Die Zeit vor, das zeigt, wie man als Medienmarke Menschen ins Gespräch bringen kann. Auf der Online-Plattform „Deutschland spricht“ stellte Die Zeit ihren Lesern Fragen wie „Hat Deutschland zu viele Flüchtlinge aufgenommen?“. Die Antworten der registrierten User wurden ausgewertet und Menschen mit besonders gegensätzlichen Standpunkten anschließend unter dem Motto „redet miteinander“ analog zusammengebracht. Inzwischen läuft das Projekt auch auf internationaler Ebene sehr erfolgreich. / Nun: Definiere Medien, definiere Haltung. Wenn mit „Medien“ die klassischen „Leitmedien“ oder „Qualitätsmedien“ gemeint sind und mit „Haltung“ eine – auch aus aktuellem Anlass – gesteigerte Wachsamkeit, ein gesteigertes kritisch-distanziertes Verhältnis zur Macht und zu den Mächtigen, die ja tatsächlich allerorten an den Grundpfeilern der demokratischen Ordnung rütteln, den Klimawandel – oder gar den Holocaust – leugnen und generell Populismus wie Nationalismus wieder salonfähig machen; ja wenn gar die Pressefreiheit selbst zunehmend unter Beschuss gerät und sogar die Werbung vermehrt „auf Haltung macht“, dann ist man versucht, die Frage im Sinne des Zeitgeistes reflexartig mit „ja, natürlich“ zu beantworten. Selbstverständlich sollen Qualitätsmedien ihrer in der Verfassung verankerten Funktion im demokratischen Gemeinwesen gerecht werden und die Bürger informieren, das Zeitgeschehen einordnen und „sagen, was ist“ – immer im Sinne der Demokratie und einer freiheitlichen Gesellschaft.
Unsere Verantwortung für eine offene Gesellschaft - Facebooks Rolle als Plattform
Authors: Kulow Tina
Published: January 2021

Facebook hat es sich zum Ziel gesetzt, die Welt näher zusammenzubringen. Unsere Mission übersetzt sich als klare Haltung für eine offene Gesellschaft in unserer Unternehmenskultur. Um so ein großes Ziel langfristig zu verfolgen, braucht es eine Kultur, die auf starken Werten basiert. Vielfalt und Inklusion sind zwei dieser fest verankerten Werte, die nicht nur niedergeschrieben sind, sondern sich in der tagtäglichen Zusammenarbeit bei Facebook zeigen. Mit den Facebook-Apps wollen wir Menschen miteinander verbinden, den Aufbau von Communities fördern und letztendlich gesellschaftlichen Zusammenhalt stärken – online, aber auch im analogen Leben. So spiegelt sich alles was in der Welt passiert auch in den sozialen Medien wider.
Einführung
Authors: Riese Markus
Published: January 2021

Medienmarken nehmen vermehrt Stellung zu gesellschaftlichen Themen und bereichern damit den öffentlichen Diskurs. In diesem Diskurs wird das Selbstverständnis von Medienunternehmen zwischen einer Gewinnorientierung und einer Wertorientierung neu ausgehandelt. Es reicht nicht mehr aus, dass Unternehmen erfolgreich wirtschaften. Sie sollen auch deutlich einen wertvollen Beitrag zum Gemeinwohl – mit den Interessen nachfolgender Generationen im Blick – leisten.
Translated Literature in Contemporary Slovenia
Authors: Blatnik Andrej
Published: January 2021

Based on a typological model borrowed from sociology, this article analyzes literary translation support mechanisms in the world and especially in Slovenia. It tracks the growing inclusion of translation policies in the national cultural policies and subsequent growth of the translated books in the book subsidy system and their strong presence in the reading field. With the help of statistical data it shows the status of translated litera­ture in Slovenian reading habits.
Between the Manuscript and the Book: Functions of the Editor
Authors: Girčienė Jurgita
Published: January 2021

This article, based on interviews with representatives of Lithuanian publishing houses, describes the editor’s role in contemporary publishing. It is showed that editors contribute to strategic and managerial processes within the publishing houses and are responsible for the process of editing manu­scripts. Even though certain publishing houses retain the habit of referring to the senior or chief editor as the one engaged in strategic activity, today many of the houses have project manager positions tasked with shaping the publishing portfolio. Today’s editors engage in managerial activities rarely; their main field of responsibility remains editing manuscripts. The clearest functions are associated with microlevel text specialization: copyeditors, proofreaders, and editors handling book layouts. Lithuanian publishing houses are yet to develop a clearly defined role of content editors, which is customary in other countries wherein the publishing industry had developed more consistently. According to the publishers, Lithuanian publishing houses face a lack of experts able to refine the contents of the manuscripts, i.e., to offer macrolevel text editing services.
The Dialogue between the Supreme Administrative Court and the Constitutional Tribunal in the Preliminary Reference Procedure
Authors: Chmielarz-Grochal Anna
Published: January 2021

The purpose of the article is to analyze how the Supreme Administrative Court implements the right of this court to apply to the Constitutional Tribunal, enshrined in the Constitution of the Republic of Poland, with a request to examine the constitutionality of the legal act applicable in a particular case. The emergence of this investigation is marked by a noticeable decrease in the number of requests submitted by administrative courts to investigate the constitutionality of a legal act, which encourages the investigation of the causes of this phenomenon. The prior application of the court for the constitutionality of a legal act encourages the analysis of a specific cooperation dialogue between the requesting court and the Constitutional Tribunal.
Special Legal Regimes and Their Status under the Lithuanian Legal System
Authors: Vaičaitis Vaidotas A.
Published: January 2021

Based on the constitutional approach, this article examines three special legal regimes in the Lithuanian legal system: the state of emergency, disaster management regime, and quarantine. The article uses four methodological criteria to reveal the differences and similarities between these legal regimes: a) the basis for the declaration of a particular legal regime, b) the subjects of their declaration and management, c) their duration, and d) the special measures applied during them, including human rights restrictions.
Hubungan Penggunaan Instagram dengan Self-Presentation Mahasiswa Perguruan Tinggi Tangerang Selatan
Authors: Yunita Yosa , Amirudin Amirudin
Published: January 2021

Instagram merupakan media berbagi foto atau video. Instagram menggunakan foto atau video sebagai bentuk penyampaian pesan. Bentuk interaksi dalam Instagram dapat dilakukan dengan memberikan like atau komentar di dalam unggahan foto atau video pengguna Instagram. Dalam menggunakan Instagram tentu seseorang memiliki tujuan masing-masing, salah satunya menjadikan Instagram sebagai media untuk mempresentasikan dirinya. Presentasi diri merupakan upaya individu untuk menumbuhkan kesan tertentu di depan orang lain dengan cara menata perilaku agar orang lain memaknai identitas dirinya sesuai dengan apa yang ia inginkan. Penelitian ini ingin mencari tahu apakah ada hubungan antara penggunaan Instagram dengan presentasi diri mahasiswa Perguruan Tinggi Tangerang Selatan. Penelitian ini menggunakan pendekatan kuantitatif dengan analisis statistika korelasional. Sedangkan teknik pengumpulan data yang digunakan yaitu kuesioner dan dokumentasi.Teori yang digunakan dalam penelitian ini yaitu teori penggunaan Instagram dengan dimensi aktivitas Instagram yang dikemukakan oleh Atmoko (2012). Berdasarkan hasil penelitian, korelasi atau hubungan antara penggunaan Instagram dengan presentasi diri mahasiswa Perguruan Tinggi Tangerang Selatan kuat, dengan nilai 0,743. Adapun hasil uji hipotesis dalam penelitian ini menunjukkan bahwa Ha diterima dan Ho ditolak, sehingga ada hubungan antara penggunaan Instagram dengan presentasi diri mahasiswa Perguruan Tinggi Tangerang Selatan.
Bisnis Multi Level Marketing Pada PT. K-Link Nusantara Di Tinjau Dari Hukum Bisnis Islam
Authors: Nurhasanah Siti , Taufik Sulamat
Published: January 2021

The purpose of this research is to discuss the multi level marketing (MLM) business in terms of Islamic business law, as well as to find out how the business practices carried out by PT. K-LINK and whether K-Link's MLM business practices are in accordance with the DSN-MUI fatwa No 75 / DSN-MUI / VII / 2009. This study used descriptive qualitative method. The data collection techniques used interviews and documentation. Based on the research results it is known that the Multi Level Marketing business practices at PT. K-Link Nusantara, starting from its direct selling practice, marketing and recruiting, bonus distribution and prices have followed the existing Islamic law rules and can be said to be in accordance with the basic principles of the Islamic religion which refers to the Al-Quran, Hadith, and Ijma '. And the MLM business practices of PT. K-Link Nusantara is protected from something that is forbidden such as maisir, ghoror, haram, usury, indecency, dzulm and immorality. The aqad uses aqad al-bai '/ murabahah, aqad wakalah, aqad ju'alah, and aqad ujroh. All of these aqads are adjusted to the contents of the DSN-MUI fatwa Number 75 / DSN-MUI / VII / 2009 concerning the Guidelines for Direct Selling in Sharia Level, so the practice can be said to be in accordance with the DSN-MUI fatwa Number 75 / DSN-MUI / VII / 2009.
Akad Wakalah Menjadi Penyebab Pembiayaan Murabahah Bergeser Dari Transaksi Jual Beli Menjadi Transaksi Jasa
Authors: Azis Abdul , Muslim Mochamad Bukhori , Hidayah Nur
Published: January 2021

This paper examines the wakalah contract as the cause of the shift of murabaha  financing from buying and selling transactions to service transactions. Analysis of wakalah legal norms with normative philosophical approaches, normative juridical and empirical juridical. The wakalah contract given by Islamic banks absolutely to customers to make purchases has caused murabaha  financing to shift from buying and selling transactions to service transactions, because the customer has acted for and on behalf of himself in purchasing goods from suppliers, while the money transferred by the bank sharia to customers is considered as borrowed money. A wakalah contract that does not have any effect on transactions on customers in purchasing goods from suppliers, cannot be called wakalah but has the effect of transferring money from Islamic banks to customers as service transactions
Ketahanan Nasional Dalam Perspektif Al-qur’an
Authors: Ghani Abdul
Published: January 2021

The conclusion of this dissertation is that the concept of national resilience in the Qur'an supports the National Resilience concept of national resilience, which consists of 8 (eight) gatra, namely: geography, demographics, ideology, politics, economics, social culture, and natural resources. Besides that, through searching the words al-difa '(defense), al-amn (security), al-hifz (maintenance) and al-salam (safety in the Qur'an, this dissertation reveals 9 (nine) other gatras that support the national resilience, namely: conducive community environmental resilience, the community's physical and mental health, the quality of education, law enforcement, deliberative culture, technology, national character, leadership and faith of citizens.This disertation has different studies with Syarifuddin (2018): "Soldiers in the Qur'anic Perspective", which discusses the function of the army as guardians of national resistance in the perspective of the Koran. Thus with Muhammad Yahdi (2019): "Military in the perspective of the Koran", which discusses the mental development of the army with an approach used by Rasulullah Saw in mentoring the army as a guardian of national defense. This dissertation has the same opinion with Chasib (2015), Valentinus CP. (2014) Lotaria L atif (2017) which discusses global national resilience. This dissertation has a difference with Fitriyani from Gadjah Mada University in Yogyakarta (2015) entitled "Care for the Environment in the framework of national resilience", Study on the youth association of Environmental care in the Semarang area.This dissertation uses a qualitative method, whereas in interpretation, the writer uses the maudu'i interpretation method by extracting verses of the Koran as an argument to answer various reasons related to the title namely: "National resilience in the perspective of the Koran".
Pengaruh Motivasi Intrinsik Dan Peraturan Pesantren Terhadap Kepuasan Santri Pondok Pesantren Manahijussadat Lebak, Banten
Authors: Saragih Muhamad Nasrun , Sastradiharja EE Junaedi , Zuhri Saifuddin
Published: January 2021

This study aims to test and determine whether empirically through valid data, intrinsic motivation and pesantren regulations have an effect on the satisfaction of students both partially and simultaneously. The method used by researchers is a survey method with a correlational approach to the santri of Manahijusadat Islamic Boarding School in Lebak, Banten. This type of research is quantitative, therefore the data analysis technique used is statistical analysis techniques, namely descriptive statistical techniques and inferential statistics. As for the means of collecting data through a questionnaire to 100 respondents from class III MTs Manahijussadat Islamic Boarding School, interviews and documentation. The results of the research hypothesis test showed that there was a positive and significant influence of intrinsic motivation on student satisfaction with a percentage of 17.8%. Second, there is a positive and significant effect of Islamic boarding school regulations on the satisfaction of students as indicated by the percentage of influence of 25.5%. Third, there is a joint positive and significant effect of intrinsic motivation and pesantren regulations on student satisfaction by 32.6%
Vestibular, Gaze, and Balance Disorders in Asymptomatic Congenital Cytomegalovirus Infection
Authors: Pinninti Swetha , Christy Jennifer , Almutairi Anwar , Cochrane Graham , Fowler Karen B. , Boppana Suresh
Published: January 2021

BACKGROUND AND OBJECTIVES:

Congenital cytomegalovirus (cCMV) is the leading nongenetic cause of sensorineural hearing loss and developmental disabilities. Because there are limited data from studies of vestibular involvement in select groups of children with cCMV, the true frequency of vestibular disorders in cCMV is likely underestimated. Our objective for this study is to determine the prevalence of vestibular, gaze, and balance disorders in a cohort of children with asymptomatic cCMV.

METHODS:

Comprehensive vestibular, gaze, and balance assessments were performed in 40 children with asymptomatic cCMV. The function of semicircular canals of the inner ear and vestibulo-visual tract were assessed by measuring vestibulo-ocular reflex in a computer-driven motorized rotary chair; inner ear saccular function was assessed by using cervical vestibular evoked myogenic potential; gaze stability during head movement was assessed by using clinical dynamic visual acuity, and balance was assessed by using the sensory organization test and the Bruininks-Oseretsky Test of Motor Proficiency, Second Edition. Test results for each variable were compared with those of a control group without cCMV and/or compared to age-matched normative published data.

RESULTS:

Vestibular disorders were evident in 45% of the cohort on the basis of rotary chair and cervical vestibular evoked myogenic potential testing, suggesting abnormalities in semicircular canals, the utricle and saccule of the inner ear, and vestibulo-visual tracts. Additionally, 46% of the cohort had difficulties maintaining gaze during head movement, and one-third to one-half of the cohort had difficulties maintaining balance.

CONCLUSIONS:

Vestibular, gaze, and balance disorders are highly prevalent in children with asymptomatic cCMV. Systematic screening for vestibular disorders will be used to determine the full clinical impact for the development of effective interventions.
The abundance of false killer whale, Pseudorca crassidens (Artiodactyla: Delphinidae) in coastal waters of Golfo Dulce and Osa Peninsula, Costa Rica
Authors: Sánchez Robledo Erika , Oviedo Correa Lenin Enrique , Herra-Miranda David , Pacheco-Polanco Juan Diego , Goodman Sierra , Guzman Hector
Published: January 2021

Introduction: False killer whale (Pseudorca crassidens) is a tropical and subtropical social species that live in groups with individuals of mixed ages and sex classes. False killer whales have been documented since the late 1990s in Southwestern Costa Rica. Objective: To estimate the abundance of false killer whales in Osa Peninsula waters. Methods: Cetacean surveys off the Osa Peninsula Waters (OPW), Costa Rica, yielded opportunistic encounters with false killer whales in Drake Bay and Caño Island (2001-2015) and observations during formal surveys in Golfo Dulce (2005-2015). Photo-identification data was analyzed using capture-mark-recapture models in the study area, through an open population (POPAN) framework, considering the effect of time on the parameters apparent survival and capture probability, producing an abundance estimate for a superpopulation in the entire study area. Results: False killer whale abundance in OPW is characterized by a small population size of no more than 100 individuals, complemented by a very low probability of encounter and a contrasting high apparent survival. Conclusions: This population estimate should be taken as conservative, however, the small population size of less than 100 individuals should be considered vulnerable, in contrast to the increasing anthropogenic impacts in the coastal seascape. We argue the potential occurrence of population units along the coastal seascape of the Pacific littoral and oceanic island-associated units at Isla del Coco.
Will global change modify the distribution of the Anadenanthera colubrina (Fabales: Fabaceae) plant, a key species in dry tropical forest?
Authors: Giamminola Eugenia Mabel
Published: January 2021

Introduction: Seasonally dry tropical forests (SDTF) are one of the most threatened terrestrial ecosystems on the planet as a consequence of global change. They harbor high biodiversity and provide a wide range of ecosystem services; therefore, their conservation is a priority worldwide. Climate warming, as well as land use patterns, are leading to species distribution range shifts. Objective: The objective of this work was to study the current and future potential distribution of a SDTF representative tree species (Anadenanthera colubrina) in the Argentinian Sub Andean Piedmont nucleus and to assess the effects of land use and climate changes. Methods: Current and future potential distribution was modeled with Maxent, using 49 presence points and 20 variables. Climate change effects were estimated in four different temperature and carbon dioxide concentration scenarios. Land use changes were determined subtracting the deforested area until 2017 to the current and future potential distribution of the species. Results: A. colubrina current distribution represents 18 % of Northwestern Argentina. Land use changes decreased almost 25 % of it and climate change will probably cause a retraction in the East and a slight expansion towards the West and South of the current distribution. The synergistic effect of land use and climate change projected to the worst scenario would reduce 63 % of its current distribution. Conclusions: Our data demonstrate the central role of distribution range studies to assess the effects of anthropic activities. Climate change and land use change would have a negative and synergistic effect on the distribution of A. colubrina. Although a possible expansion of the Sub Andean Piedmont nucleus of SDTF would occur, this expansion may be limited by the Sub Andean mountain range that could act as an orographic barrier.
Seasonal and annual variation in the abundance of Ephuta (Hymenoptera: Mutillidae) in Panama
Authors: Añino Yostin J , Cambra Roberto A , Windsor Donald M , Williams Kevin A , Bartholomay Pedro R , Sánchez Vanessa , Quintero Diomedes
Published: January 2021

Introduction: Ephuta Say is a widespread New World genus of mutillid wasp whose ecology is poorly understood. Objective: The objective of this study was to determine how Ephuta species abundance varies annually and seasonally driven by weather conditions and hosts. Methods: Ephuta specimens, located in the “old forest” at Barro Colorado Island, were examined from weekly samples (2001-2006) of ten Malaise traps. The monthly abundance of each Ephuta species was compared with monthly average humidity, solar radiation, temperature and rainfall. Results: Nine species and ten morphospecies were identified. Most specimens were collected from March to June. April was the month reported with the greatest abundance. Of the four abiotic variables measured, only average monthly temperature was correlated with Ephuta abundance. Months with the highest number of Ephuta specimens were correlated with suspected host abundance, as indicated by the monthly abundance of Pompilidae (Hymenoptera) captured during the year 2007. Conclusions: We concluded that Ephuta display strong seasonal variation in abundance, with the peaks occurring during the end of the dry season and beginning of the rainy season, which correlate broadly with temperature and the abundance of their pompilid hosts.
Briófitos en los troncos de árboles como indicadores de la alteración en bosques montanos de Panamá
Authors: Guerra Georgina , Arrocha Clotilde , Rodríguez Gloria , Déleg Jorge , Benítez Ángel
Published: January 2021

Introducción: Los bosques montanos tropicales se caracterizan por una alta riqueza y endemismo de briófitos. Sin embargo, la diversidad es altamente sensible a cambios microclimáticos relacionados con alteraciones antrópicas. Objetivo: En este estudio, se evaluó la riqueza y composición de briófitos epífitos en los troncos de árboles de bosques montanos alterados y bosques no alterados ubicados en la ladera occidental del Parque Nacional Volcán Barú. Métodos: Los bosques no alterados mostraron alta humedad, mientras que los bosques alterados mostraron altos niveles de luz y temperatura. En cada árbol evaluamos la presencia y cobertura de briófitos epífitos en 160 cuadrantes de 20 × 30 cm. Resultados: Se registraron un total de 86 especies (49 hepáticas y 37 musgos). La riqueza fue positivamente influenciada por la alteración antrópica, donde los bosques alterados presentaron un mayor número de epífitos de sol. La composición de las comunidades difiere entre los dos tipos de bosques, donde las epífitas de sombra fueron restringidas a bosques no alterados, mientras que las epífitas de sol a zonas alteradas. Conclusiones: Las comunidades de briófitos fueron indicadores efectivos de la alteración de los bosques montanos del Parque Nacional Volcán Barú. Por lo tanto, la conservación de los bosques no alterados garantizará la conservación de una rica y diversa comunidad de briófitos epífitos.
Spatial variations of leaf morphometry in mangroves in La Havana, Cuba
Authors: Denis Dennis
Published: January 2021

Introduction: Mangroves represent 11 % of the emerged land of Cuba. There is no previous research describing foliar characteristics, but these variables can be used as health indicators in forest ecosystems. Objective: In the current study we describe folial morphometry in four mangroves around Havana city: Bajos de Santa Ana, Cojímar, Rincón de Guanabo and El Cobre – Itabo lagoon. Methods: We collected 1 472 leaves´ samples of Rhizophora mangle, Avicennia germinans and Laguncularia racemosa, between April and July in 2019, to extract eight foliar variables: length, width, area, perimeter, lateral asymmetry, inner angles and shape index. Results: Geographic differences several variables of leaves in R. mangle and A. germinans were detected, but L. racemosa showed high similarity among localities. Differences can be explained by environmental differences in localities. Conclusions: There is a need for more extensive research on these kinds of foliar indicators to support it use in future monitoring or researches, and for that using digital pictures fotografías pose many advantages.
Population genetics of the fish Brycon henni (Characiformes: Bryconidae) using species-specific polymorphic microsatellite loci
Authors: Landínez-García Ricardo M. , Márquez Edna J.
Published: January 2021

Introduction: The freshwater fish Brycon henni (Characiformes: Bryconidae) is endemic to Colombia and currently considered as “least concern” according to the International Union for Conservation of Nature (IUCN). Objective: To develop microsatellite markers to examine population genetics in Brycon henni. Methods: Using a low-coverage sequenced genomic library, this study developed the first set of microsatellite loci to study the population genetics of this Neotropical species. These loci were used to evaluate the genetic diversity and structure of B. henni from three sites of the Magdalena-Cauca Basin (Colombia). Results: A set of twenty-one polymorphic microsatellite loci was highly informative and revealed that B. henni is evenly genetically structured between two tributaries of the Cauca River separated by only 30 km, a finding that indicates it conforms to reproductively isolated groups. Conclusions: We reported a set of twenty-one polymorphic microsatellite loci that was highly informative and allowed the detection of genetic structure at local and regional scales. This genetic population structure, concordant with that found in eight congeners, is relevant to estimate the B. henni risk categorization as well as for management, conservation, and restocking programs.
Population biology and sexual dimorphism in the freshwater prawn Atya scabra (Decapoda: Atyidae) in the De Contas River, Bahia, Brazil
Authors: De Barros Matheus Souza Ferreira , Calado Tereza Cristina dos Santos , Dos Santos Ewerton Vieira , Silva Alberis Santos , Albuquerque Letícia Gomes de Andrade
Published: January 2021

Abstract. Introduction: Crustaceans have economic and ecological importance and the role of caridean crustaceans in lentic environments is crucial to maintain the trophic structure. The species Atya scabra is occasionally associated with fisheries, especially in Northeast and Northern Brazil. Objective: To determine the population structure, reproductive period, patterns of growth and distribution of size classes among sexes in a population of the prawn A. scabra in the De Contas River, Bahia, Brazil. Methods: Individuals were sampled in a period of one year by passing sieves through marginal vegetation and using dragnets. In the laboratory, we recorded the sex of the individuals and measured them using a pachymeter with 0.001 mm precision. The dimensions measured were CL (carapace length), TL (total length) and CW (carapace width). In order to analyze data, linear models for the relationships CL × CW were constructed and the type of allometry for each sex was determined. Individuals were grouped into size classes of 5 mm intervals. A chi-square test (χ2) was used to test deviation from the 1:1 sex ratio. The proportion of ovigerous females was registered for each month to determine the breeding period. Results: A total of 517 individuals were collected, 328 were males and 186 females of which 169 were ovigerous. Males showed a polymodal distribution in size classes and were significantly larger than females, which presented a unimodal distribution in size classes. The observed growth patterns demonstrated that both sexes present negative allometry. However, sexual dimorphism was detected when comparing the growth parameters. Ovigerous females were sampled the entire year and size-frequency data demonstrated that recruitment also occurs throughout the year, which allowed us to classify their reproduction as continuous. Conclusions: Our data is essential to draw sustainable fishery management strategies. We suggest a minimum capture size of 70 mm and capture restrictions from May to August.

Key words: ecology; freshwater; limnology; conservation; morphometry.
Sex ratio of the green sea turtle Chelonia mydas (Testudines: Cheloniidae) hatchlings in the Guanahacabibes Peninsula, Cuba
Authors: Calderón-Peña Randy , Betancourt-Avila Ryan , Rodríguez-Fajardo Elizabeth , Martínez-González Yoel , Azanza Ricardo Julia
Published: January 2021

Introduction: Sea turtles have temperature dependent sex determination. The increase in global temperature leads to higher nest temperatures that can cause a prevalence of females, threatening the future of these species. Objective: The present work aims to evaluate the trend of incubation temperatures and the incubation period, as well as to estimate the sex ratio in nests of Chelonia mydas at Antonio and La Barca beaches, Southwestern Cuba, during the seasons from 2012 to 2018. Methods: Temperature data loggers were placed in green turtle nests with a representativeness that varied between the years analyzed. To assess the temporal variation of temperatures and incubation periods, a Kruskal-Wallis test was performed in each case. Sex ratio was estimated from its relation with temperature and incubation duration. Results: At La Barca beach, there was a 1.5 °C increase in the mean nest temperature from 2012 to 2018, although no differences were found in the period from 2015 to 2018. At Antonio beach, there is no trend since no differences were found in the mean nest temperature except for the years 2013 and 2017, which had lower temperatures than the other seasons. In both beaches mean nest temperature exceeded 30 °C in most of the years. As a result, there was a predominance of nests with incubation periods shorter than 55 days. With these values, a female hatchling production over 90 % is expected in both study sites. Conclusions: In correspondence with the registered temperature and incubation period values, most of the years reflect a hatchling production biased towards females in both beaches.
Can agroecological management increase functional diversity of birds in rice fields?
Authors: Lorenzón Rodrigo Ezequiel , León Evelina , Juani Marcelo , Beltzer Adolfo , Peltzer Paola , Lajmanovich Rafael , Attademo Andrés
Published: January 2021

Introduction: Recognition of the variety of ecosystem services that biodiversity performs in agroecosystems is one of the basic principles of agroecology. Because indices of functional diversity may be directly related with ecosystem services, an assessment of functional diversity can be useful for evaluating ecosystem services provided under agroecological management. Objective: We compared functional diversity of birds found in rice fields under conventional and agroecological management in the rice zone of Santa Fe Province, Argentina. Our objective was to determine whether agroecological management of rice is associated with a higher functional diversity and a different functional composition of birds than conventional management. Methods: We surveyed birds eight times, roughly every 15 days between November 2017 and March 2018, from beginning of sowing to before harvest, in both types of rice fields. Birds were sampled by a combined technique of line transects and point counts at four sites in each type of management. We calculated indices of functional diversity and composition based on morphologic and trophic attributes of birds detected in each type of field. Results: Functional richness, divergence and dispersion were higher under agroecological management. Only differences in functional richness between managements reflected differences in species richness. Community-level weighted means of trait values by sample varied between management types. An insectivorous diet, pursuit as a foraging method, and air and shrubs as foraging substrates were traits best represented under agroecological management. Conclusions: Our results suggest that agroecological management of rice crops is related with a higher functional diversity of birds than conventional practices, suggesting that agroecological management may enhance the provision of ecosystem services by birds in rice agroecosystems.
Essential oil composition and cytotoxic activity in two species of the plant genus Vismia (Hypericaceae) from the Venezuelan Andes
Authors: Vera Janne Rojas , Buitrago Díaz Alexis , Arvelo Francisco A. , Sojo Felipe J. , Suarez Alírica I. , Rojas Luis
Published: January 2021

Abstract. Introduction: The Vismia genus belongs to the Hypericaceae family and comprises around 57 species of which 17 have been located in Venezuela. Previous investigations have been carried out in extracts as well as pure isolated compounds, revealing antimicrobial, antioxidant and anti-HIV, among other, biological activities. Objective: This investigation aims to determine the cytotoxic activity of essential oils from leaves of Vismia baccifera Triana & Planch (VBJ and VBV) and Vismia macrophylla Kunth (VM) collected in three different locations of the Venezuelan Andean region. Methods: Essential oils obtained by hydrodistillation were analyzed using gas chromatography-mass spectrometry (GC-MS) and their cytotoxic activity was analyzed following the MTT (3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyltetrazolium bromide) assay. Human tumor cell lines from SKBr3, MCF-7 and PANC-1, two breast carcinomas and one pancreatic adenocarcinoma of ductal type, were tested with the oil samples and human dermis fibroblasts were used as non-tumor cells. Results: β-caryophyllene and trans-caryophyllene were present as major components in VBJ and VBV, respectively, while γ-bisabolene was the main component in the VM sample. Anticancer activity was observed on V. baccifera essential oil against SKBr3, MCF-7 and PANC-1. The selectivity index showed that VBV is highly selective against the SKBr3 cell line and has no activity against non-tumor cells. Conclusions: These results are considered a contribution to natural products research and may provide supportive data for future studies on cancer.
Riqueza estacional y estructura de la comunidad de hormigas epígeas en fragmentos de bosque de sabanas inundables, Orinoquia Colombiana
Authors: Agudelo-Martínez Juan Carlos , Pérez-Buitrago Néstor
Published: January 2021

Introducción: Las hormigas son uno de los grupos taxonómicos más abundantes y diversos, además su fidelidad ecológica les permite desempeñar roles indispensables para el funcionamiento adecuado de los ecosistemas terrestres. Objetivo: evaluar la dinámica estacional de la biodiversidad (riqueza y abundancia) de la comunidad de hormigas asociadas a fragmentos de bosque y la sabana inundable circundante (sabana-borde-bosque) en el municipio de Arauca (Colombia). Métodos: en un transecto lineal se recolectaron hormigas en siete puntos de muestreo usando trampas de caída, recolecta directa y saco mini-winkler para hojarasca en ocho fragmentos de bosque y la sabana circundante. Estimadores no paramétricos y el índice de complementariedad se utilizaron para describir la estructura de la comunidad de hormigas. Las estaciones climáticas (sequía y lluvias) y los ambientes (sabana inundable, borde y bosque) se compararon utilizando la riqueza y abundancia de especies. La relación de las especies de hormigas por cada punto de muestreo se evaluó con un análisis de escalamiento multidimensional no métrico (NMDS) y los atributos de los fragmentos de bosque se relacionaron con la riqueza de especies a través de un análisis de correspondencia canónica (CCA). Resultados: se recolectaron 30 496 especímenes correspondientes a 104 especies, 37 géneros y ocho subfamilias. Los géneros mejor representados fueron: Pheidole, Camponotus, Solenopsis y Dolichoderus. Los estimadores de riqueza no paramétricos mostraron que la comunidad de hormigas oscila entre 107 y 119 especies. No se detectaron diferencias en la riqueza y abundancia de especies respecto a las estaciones climáticas. La riqueza de especies fue mayor en el bosque respecto a la de la sabana y el borde. El resultado del ACC presentó una variación total explicada por el 62.7 % que muestra la relación entre las especies y los atributos de los fragmentos de bosque. Conclusiones: no se detectaron diferencias en la riqueza y abundancia de especies entre las estaciones seca y lluviosa, sugiriendo que las especies son residentes permanentes del área de estudio, por lo que deben existir mecanismos que permitan a ciertas especies de hormigas sobrellevar la estación lluviosa. Las variables del fragmento área, perímetro y compactación presentan una relación directa con la riqueza de especies, mientras que la dimensión fractal tiene una relación inversa sobre la riqueza de especies que el fragmento alberga. Este trabajo amplía el conocimiento de las especies de hormigas presentes en el norte de la Orinoquia colombiana.
Research impact and productivity of Benin according to the Science Citation Index Expanded (1973 to 2018)
Authors: Monge-Nájera Julián , Mêgnigbêto Eustache , Ho Yuh-Shan
Published: January 2021

Introduction: In Benin, a tropical West African country of 11 million inhabitants where the economy is based on agriculture, the only bibliometric work available has focused on the role of collaboration among researchers, but there are no general long term studies of the country’s scientific output. Objective: To analyse the scientific output of Benin, according to the Science Citation Index Expanded, in a 46-year period. Methods: We searched for “Benin” in the country/region field of the index and analysed the results with descriptive statistics. Results: We found 4 557 documents, published between 1973 and 2018. They closely match the trends previously found in other small tropical countries: domination of articles over other types of publication like letters and notes; increase in total number of articles published each year; small collaborations in large American and European projects; and a long article lifespan that reflects the relatively slow accumulation of scientific research in tropical regions. Considering the size of the country’s economy, Benin has a good level of scientific productivity. Conclusion: In its scientific activity, Benin is similar to other tropical countries, and would benefit from increased cooperation among local researchers; from less dependence on small participations in international megaprojects, and from opening the door to research in areas of innovation rather than just solving immediate problems.
Análise quantitativa dos graduados, acadêmicos e evadidos do curso de licenciatura em Física da UFAC: um diagnóstico inicial
Authors: Santos Bianca , Silva Marcelo Castanheira da , Pinheiro Antonio Romero da Costa , Paiva Irlen , Melo Junior Eloi Benicio de
Published: January 2021

O presente trabalho visa apresentar um diagnóstico inicial sobre o quantitativo de alunos que evadiram e concluíram o curso de licenciatura em Física da Universidade Federal do Acre. O estudo foi baseado nos dados fornecidos pela coordenação do curso referente aos treze anos de existência, a partir da abertura em 2005 até o primeiro semestre de 2018. O estudo ainda apresenta abordagem estatística e uma reflexão sobre a importância do curso para o estado do Acre, bem como apresenta elementos do perfil do licenciado em Física (diplomado), como sexo, à idade que concluiu a graduação, a naturalidade e a faixa de tempo necessário para integralizar os estudos. Verificou que a diferença de sexo, forma de ingresso e períodos cursados estão ligados a evasão dos graduandos. Constatou-se que os 4º e 6º períodos têm o maior índice de evasão, a formação por outro lado ocorre entre o 8º e 11º período.
Histórias de vida e pesquisa (auto)biográfica: contribuições para a formação da identidade docente
Authors: Freitas Bruno Miranda , Barguil Paulo Meireles
Published: January 2021

Este texto objetiva discutir sobre as Histórias de vida e a Pesquisa (auto)biográfica nas Ciências Humanas, e, de modo especial, na área da Educação, e apresentar as suas contribuições para a formação da identidade docente. As Histórias de vida e a Pesquisa (auto)biográfica são práticas autopoiéticas, nas quais o sujeito identifica aspectos formadores nas suas experiências e constitui sentido à sua trajetória. Neste artigo, de natureza bibliográfica, analisaremos aportes teóricos de Josso (2010), Pineau e Le Grand (2012), Ferrarotti (2014), Delory-Momberger (2014), Dominicé (2014a, 2014b, 2014c), Nóvoa (2014) dentre outros. Conforme esse referencial, a reflexão sobre a trajetória pessoal é um movimento investigativo e formador da identidade, a qual não é fixa, pois o sujeito pode reconfigurá-la em virtude de novas experiências e interpretações.
Correlations between grain yield and related traits in winter wheat under multi-environmental traits
Authors: Tsenov N. , Gubatov T. , Yanchev I.
Published: January 2021

Abstract. In a series of field trials, a database of quantitative traits associated with winter wheat grain yield has been collected. The aim of the present study is to determine the relationships between the winter wheat (Triticum aestivum L.) traits of productivity in environments causing the maximum possible variation of each of the traits. In order to determine the correlations between the quantitative characters studied, all possible statistical methods have been applied (regression analysis, PCA, Multiple Correspondence analysis), which complement each other. It was found that the nature of the correlations between traits depends to a large extent on the methods for their evaluation. There are high and significant correlations between grain yields and the grain number per spike (weight of grain per spike and number of grains per m2) even under strong genotype by environment interaction of all the traits in trails. The established results are related to possible options for increasing winter wheat grain yield by breeding.
Morphological characterization and genetic analysis in bread wheat germplasm: A combined study of heritability, genetic variance, genetic divergence and association of characters
Authors: Gerema G. , Lule D. , Lemessa F. , Mekonnen T.
Published: January 2021

Abstract. The present study was conducted to assess the nature and magnitude of genetic variability and traits association of bread wheat genotypes for yield and related traits. A total of 180 genotypes were evaluated in alpha lattice design with three replications in 2017/18 cropping season. Data for 10 quantitative traits were collected and subjected to analysis of variance. The result from the analysis of variance revealed highly significant variability observed among genotypes for all traits studied. Phenotypic coefficient of variation (PCV) is superior over genotypic coefficient of variation (GCV) for most traits but narrow variations were found between PCV and GCV for most of the traits. Heritability in broad sense and genetic advance as percent of the mean (GA%) were relatively higher for Kernels per spike and grain filling period. Grain yield showed positive and highly significant (p≤0.01) association with number of tillers, kernel per spike and plant height both on genotypic and phenotypic levels.The path coefficient analysis showed that spike length, plant height and kernels per spike had positive direct effect on grain yield on both genotypic and phenotypic levels. Divergence analysis (D2) grouped the total test germplasm into 10 clusters. Among those, clusters IV and IX showed the highest genetic distance and thus the possibility to develop segregating populations upon the crossing of widely related genotypes in those clusters. The results could help researches to utilize the most promising wheat genotypes of this study in future breeding programmes for enhancing desirable traits.
Effect of Gmelina leaf meal diets on productive and physiological parameters of West African dwarf goats
Authors: Jiwuba P.C. , Amaduronye W.N. , Akazue R.C.
Published: January 2021

Abstract. West African Dwarf (WAD) goat plays an important socio-economic role, hence the effect of 82 days of feeding Gmelina leaf meal (GLM) diets on feed intake, body weight change and blood indices of WAD goats were investigated. A total of 36 WAD goats averaging 9.04 kg in weight were randomly divided into four groups of nine goats each with three goats constituting a replicate. The groups were randomly assigned four experimental diets (T1, T2, T3, and T4, containing GLM at 0%, 12%, 24% and 36%, respectively) in a completely randomized design. Results indicated significant (p<0.05) improvement for body weights and feed conversion ratio for T2, T3, and T4. There was significant difference (p<0.05) for all the haematological parameters except packed cell volume (PCV). White blood cells (WBC) increased in their number (p<0.05) with incremental levels of GLM in the diets. All the serum biochemical indices showed significant (p<0.05) difference with glucose and cholesterol concentration reduced (p<0.05) with incremental levels of GLM. It could be concluded that GLM can be included in the diets of goats up to 36% without deleterious effects on the productive and physiological indices of WAD goats.