bluuebunny/crossref_metadata_2025 huggingface dataset:
RESEARCH REGARDING RECEPTION PARAMETER IN VOLLEYBALL AT THE LIBERO POSITION, USING SOFTWARE PROGRAMS FOR STATISTICAL ANALYZE
Authors: Gabriel alexandru Petrovici
Published: February 2023

The research in nowadays performance sport implies modern ways of training and analysis, more and more clubs are using software programs for statistical analysis in discovering their and opponents' strengths and weaknesses. Sports success measurement offers reliable information based on a variety of performance metrics. Given the complex nature of the sport, due to external impact conditions, known as situational variables such as the opponent's consistency, the time of play, the state of the match, etc., a thorough study of these measures is required, or internal characteristics, such as the role performed, the game's process, etc., which have to do with such markers. This investigation analyzes two libero players' efficiency at the reception parameter in Romania's national championship, for 10 months and 22 stages, in the season 2018-2019, at the team CSM Sibiu, Romania. The research method included the use of Click & Scout program to monitor the evolution of the two libero players at the efficiency parameter of reception and statistical tests to discover the data's statistical significance. The research results show improved reception efficiency during the national championship evolution with high performances in some stage presented in the results part and a statistically significant difference in the second part of the championship. The conclusions of the investigation highlight the idea that by using software programs and statistical interpretation of their results, coaches and the entire staff can improve the parameters of volleyball players knowing their players' strengths and weaknesses. This analyzing software proved to be efficient in discovering our players' strong points and weaknesses, analyzing the opponent's tactics, and finding ways to obtain victory in a volleyball game.
AN EVALUATION OF BLOCKCHAIN-BASED REPUTATION SYSTEMS. CASE STUDY: THE EERIS RESEARCH NETWORK
Authors: Holotescu Victor
Published: February 2023

The paper realizes an evaluation of Blockchain-based reputation systems used in education and research, starting from the definition of reputation in different contexts, then justifying the advantages of using the Blockchain technology for implementing reputation systems. A number of criteria are proposed for analyzing Blockchain-based reputation systems, selected from a review of literature presenting such projects. The results of the evaluation are used to fundament and conceive the design and implementation of a reputation research network, called EERIS - European Research Infrastructures System, which are presented in the second part of the article.
Because the events for adding information that affect the reputation happen less often, it is more efficient to query the reputation which is already stored and calculated on the Blockchain whenever it is needed. At the same time, all the information which compose the reputation are stored on the Blockchain, which makes other organizations handle their own reputation equation which can consist of different data which suits its needs.
This being said, in order to populate the Blockchain with the data the platform already contains, it is needed to do a migration. Hyperledger Fabric, because of the programming languages which can be used to write chaincode, is more powerful and allows integrating libraries or using the core methods, for making API calls, which in this case is considered to be use to initialize the chaincode upon creation.

The conclusions could be used for researchers focusing on different Blockchain educational use-cases, and also for those designing reputation systems for educational actors and entities.
Kilka uwag o strategicznym wymiarze wojny w Ukrainie
Authors: Gruszczak Artur
Published: February 2023

This chapter contains remarks on some strategic aspects of the war in Ukraine. It discusses Russia’s hostility towards the West and support for Russia from anti-Western developing countries. It emphasises the importance of the People’s Republic of China as a revisionist power questioning – like Russia – the strategic global leadership of the US. It points to the limitations and risks of the West’s strategy.
Konflikt rosyjsko-ukraiński jako czynnik nowej dwublokowej rywalizacji
Authors: Tyszkiewicz Adrian
Published: February 2023

This chapter contains remarks on some strategic aspects of the war in Ukraine. It discusses Russia’s hostility towards the West and support for Russia from anti-Western developing countries. It emphasises the importance of the People’s Republic of China as a revisionist power questioning – like Russia – the strategic global leadership of the US. It points to the limitations and risks of the West’s strategy.
Rosyjska inwazja na Ukrainę a przyszłość cyberwojny – wnioski w rocznicę „specjalnej operacji wojskowej”
Authors: Dziwisz Dominika , Sajduk Błażej
Published: February 2023

This chapter describes the ways how Russia has been using cyberspace against Ukraine, in the period immediately preceding the outbreak of the war until February 1, 2023. The aim is to present the complicated nature of activities in cyberspace and to try to explain Russian strategic assumptions in this domain of war. In addition, a prognostic element was taken into consideration, including the possible consequences of the Russian war in cyberspace for the security of Poland.
Political Polarization in Times of Crisis: La grieta and Its Impact on Argentine Democracy during the COVID-19 Pandemic
Authors: Lisińska Magdalena
Published: February 2023

The article discusses how the Argentine socio‑political polarization known as la grieta has influenced the country’s politics and impacted democratic standards during the Covid‑19 pandemic. It uses qualitative data to present the nature of Argentine socio‑political polarization, the outbreak of the Covid‑19 pandemic in Argentina and new areas of polarization that emerged in the country under the pandemic situation, mainly the quarantine measures and vaccination campaign. The paper also takes a look on potential challenges for the Argentine democracy in a post‑pandemic reality.
Denunciando al estado. Los artistas como Campaneros en América Latina de los 60.
Authors: Fijałkowska-Myszyńska Alicja
Published: February 2023

DENOUNCING THE STATE: THE ARTISTS AS BELL RINGERS IN LATIN AMERICA OF THE 1960S The term bell‑ringer is relatively new, however, it is derived from the concept of whistleblower, which emerged in the 1960s. In that decade, many Latin American countries experienced coups and military dictatorships, which oppressed the political opposition and censored the media. In the absence of the institutions of control and independent journalism, artists began to denounce the abuses of power and the vices of societies in their works, which led to the creation of new artistic movements in Latin America. This article seeks to test a hypothesis that as a result, the artists became bell‑ringers, perfectly fitting the definition framework of the theory presented by Marcia P. Miceli, Suelette Dreyfus, and Janet P. Near.
Divide and Rule: Political Impact of President Trump’s US-Mexico Border Wall Initiative
Authors: Laidler Paweł
Published: February 2023

While announcing his participation in 2016 presidential campaign, Donald Trump promised, if elected, to build a wall along the US‑Mexican border to limit the flow of illegal immigrants from Latin America to the United States. During the campaign, he repeatedly stressed the necessity to control the situation at the border, which he indicated as one of the biggest threats for US national security, claiming that Mexico should pay for the construction of the wall. After winning the election, President Trump decided to fulfill his promise and signed an executive order enabling the wall to be erected. During four years of his tenure, the wall was built in almost half of the planned length It had impact not only on the flow of immigrants from Latin America, but also on the debate about U.S. immigration policy, as well as on the bilateral relations with Mexico. The purpose of the article is to analyze political consequences of putting up the wall, both in the US and Mexico, and to assess the impact of Trump’s immigration policy on the relations between both countries.
Bukelismo. Regres demokracji w Salwadorze w okresie rządów Nayiba Bukele
Authors: Stelmach Michał
Published: February 2023

BUKELISMO: THE REGRESSION OF DEMOCRACY IN EL SALVADOR DURING THE TERM OF NAYIB BUKELE
The aim of the article is to analyze the process of autocratization of the El Salvador’s political system after 2019, as well as to show the specifics of the government of Nayib Bukele. The author, based on the systemic and institutional‑legal methods, and to a lesser extent empirical and comparative methods, verifies two research hypotheses, according to which (1) there was a violent and radical regression of the political system and a permanent transition from democracy to autocratic rule in El Salvador during the term of Nayib Bukele; (2) bukelismo is a classic combination of populism, militarism, and authoritarian behavior of the leader. The Salvadoran case of democratic regression has been presented in the broader context of anti‑democratic changes in the Latin American region. In the article, the author focuses on several key problems: systemic changes resulting in an imbalance and the separation of powers; mechanisms for controlling the executive power; populism and control of the information space by the president; and the militarization of politics.
Mikrokonteksty przemocy w wojnie domowej. O konflikcie zbrojnym, lokalnych antagonizmach i siłach chłopskich w Peru
Authors: Pietraszczyk-Sękowska Joanna
Published: February 2023

MICRO CONTEXTS OF VIOLENCE IN THE CIVIL WAR: ON THE ARMED CONFLICT, LOCAL ANTAGONISMS AND PEASANT FORCES IN PERU
The article discusses the mechanisms of the Peruvian internal conflict development (1980‑2000), with particular emphasis on the beginning of military operations in the central‑southern province and the circumstances of the peasants’ involvement. In the text, I decolonize the image of comuneros as passive victims of political violence. I assume that they were generally involved in the armed conflict but they responded primarily not to the macro‑ but the micro‑conditions of the processes of violence (i.e. inter‑ and intra‑village antagonisms instead of the political competition of the irregular forces with the state that arose outside their community). The article looks, therefore, at the mechanisms of the Peruvian conflict before the beginning of village self‑defense forces and identifies the sources of civilian terror in the province as well as its impact on the further course of the war. The text is based on the existing sources describing the participation of the peasants in the struggles, confronted with the results of my fieldwork in Peru in 2005‑2010 and their update from 2015‑2019.
Migración y vivienda en Buenos Aires: intensidad, calendario y generación como claves para entender el acceso a la propiedad
Authors: Mera Gabriela , Marcos Mariana
Published: February 2023

El objetivo del artículo es estudiar los diferenciales en el acceso a la propiedad de la vivienda de los migrantes internacionales en Buenos Aires desde una perspectiva demográfica poco aplicada al tema en América Latina, que explora la intensidad y el calendario del fenómeno en generaciones, grupos y territorios específicos. Para ello, se reconstruyeron las cohortes de nacimiento de diferentes colectivos nacionales a partir de datos de edad y lugar de nacimien­to, de los censos de población argentinos de 1970 a 2010. Como resultado principal, se pudo conocer que a mayor edad se produce un progresivo acceso a la propiedad de la vivienda, pero que el acceso al suelo se ha vuelto más restrictivo. Ello ha afectado a las generaciones más re­cientes en general, incluida la población argentina, pero muy especialmente a los migrantes de países limítrofes de sectores sociales más bajos y en los territorios más disputados de la ciudad.
Reflexionar para innovar
Authors: Villate Uribe Alejandro
Published: February 2023

Lejos de ser una investigación sobre el manejo de las contingencias por parte de las instituciones de educación superior, Reflexionar para innovar es un testimonio. Es la voz de la Universidad del Rosario (Colombia) contándose a sí misma y al mundo de qué manera desde las dependencias de la Vicerrectoría, en medio de un escenario tan adverso, se fortaleció y demostró cómo es posible encarar la incertidumbre frente la interrupción del derecho a la educación, la migración a modelos de educación remota mediados por tecnologías, las afectaciones a la salud (física, mental y emocional), la crisis financiera generalizada, el riesgo de abandono de las trayectorias de formación, entre muchos otros. En suma, este libro es un reconocimiento para cada uno de aquellos quienes contribuyeron a que la Universidad estuviera preparada para continuar con su labor de educar, investigar y transformar la sociedad, cuando todo parecía estar en su contra.
RELAÇÃO ENTRE CONSÓRCIOS PÚBLICOS E DESENVOLVIMENTO MUNICIPAL: uma análise a partir do tamanho e diversidade das redes intermunicipais em Minas Gerais
Authors: Leão Lucas , Quinet de Andrade Bastos Suzana , Dias Ribeiro Hilton Manoel
Published: February 2023

O estudo objetivou testar duas hipóteses relacionadas ao tamanho e a diversificação das redes de municípios mineiros, criadas a partir dos consórcios públicos. A primeira é que cidades com redes maiores (mais participantes) têm maior possibilidade de usufruir dos ganhos de escala e acesso a mais serviços públicos, o que influencia o desenvolvimento socioeconômico. A segunda é que a diversidade de áreas de atuação das redes também permite economias de escala, diante do reaproveitamento de insumos. A técnica estatística de Análise de Regressão Logística Ordenada é empregada considerando como regressandos diferentes dimensões do Índice FIRJAN de Desenvolvimento Municipal (IFDM) e como regressores variáveis criadas a partir dos dados da Confederação Nacional de Municípios (CNM) para refletirem as características das redes municipais, para 2020. Os resultados indicam que o tamanho da rede de municípios impacta positivamente a probabilidade de as cidades atingirem níveis mais elevados de desenvolvimento socioeconômico, medido pelo IFDM.
Hate Speech Detection in Social Media (Twitter) Using Neural Network
Authors: Miran Ara Zozan , Yahia Hazha Saeed
Published: February 2023

Hate speech recently became a real threat in social media, and almost all social media users are intended to in different ways. Hate speech is not limited to a group or society. It affects many people and can be classified as abusive, offensive, sexism, racism, political affiliation, religious hate, nationality, skin color, disability, gender-based, ethnicity, sexual orientation, immigrants, and others. Many researchers and authorities attempt to discover new procedures to sense hate speech in social media, especially on Facebook and Twitter, and many methods, models, and algorithms are used for this purpose. One of the most valuable models for detecting hate speech is Convolutional Neural Network (CNN). This review aims to assort academic studies on hate speech detection in Twitter using CNN-based models summarize the results of each model to expand the understanding of the recent circumstances of hate speech detection in Twitter. For this purpose, we implemented a broad, automated search using Boolean and Snowballing searching methods to find academic works in this area. Studies and papers have been distinguished, and the following information was obtained and aggregated from each article: authors, publication’s year, the journal name or the conference name, proposed model/method, the aim of the study, the outcome, and the quality of each study. According to the findings, the CNN and CNN-based models are standard models for hate speech detection. Besides, the findings show that other new models have a great compact on hate speech detection, and there is good progress in this field. However, the problems that still exist with hate speech detection models mainly are; most of the models cannot detect hate speech automatically. The methods are not suitable with all the languages, and they are working only with one language; most are best suited with the English language, and when they are used with datasets with other languages. Besides, the models are suffering from confusion in speech classification. Finally, most models are not considering a user-to-user speech in social media.
Swarm Optimization of Fuzzy Systems for Mobile Robots with Remote Control
Authors: Kozlov Oleksiy , Kondratenko Yuriy , Skakodub Oleksandr , Gerasin Oleksandr , Topalov Andriy
Published: February 2023

This paper is dedicated to the development and research of the advanced approach for optimization of fuzzy control systems (FCS) for mobile robots (MR) with remote control based on bioinspired swarm techniques. The proposed approach makes it possible to create effective intelligent control systems for MRs based on the principles of hierarchical multi-level control, remote IoT-based control, fuzzy logic control, and intelligent optimization of fuzzy control devices. The applied hybrid particle swarm optimization (PSO) techniques with elite strategy allow effectively optimizing various parameters of FCSs, finding the optimal solution to the problem, and, at the same time, have a higher convergence rate compared with the basic PSO algorithms. To evaluate the effectiveness of the obtained advanced approach based on hybrid swarm techniques, the optimization process of the FCS for the speed control of the multi-purpose caterpillar MR, which can move on inclined and vertical ferromagnetic surfaces, is carried out. The presented research results fully confirm the high efficiency of the proposed approach, as well as the expediency of its application for the optimization of fuzzy control systems for various remotely controlled mobile robots.
Repercussão de um movimento formativo de professores em atenção aos alunos com doenças crônicas (DC)
Authors: Giovanna Cruz de Souza Crispim  , Antonilma Santos Almeida Castro
Published: February 2023

O subprojeto Repercussão de um movimento formativo: em foco professores que atuam junto a alunos com doenças crônicas (DC) propõe ações a serem desenvolvidas durante a elaboração e execução de um curso de formação continuada, no sentido de analisar e compreender a repercussão dessa formação a respeito da DC, verificando se esse processo formativo reverbera na prática docente, na direção de efetivar e/ou melhorar a inclusão e permanência de alunos com doença crônica na ambiência escolar. Assim
Komunitas ikan karang herbivora di perairan Aceh bagian utara
Authors: Rudi Edi , Fadli Nur
Published: February 2023

Abstract. Herbivory reef fish is the most important of fish tropic group in the coral reef ecosystem.Hence, the objective of this study was to provide reliable data and information on herbivory reef fish based on management types in the northern Acehnese reef. Underwater Visual Census Techniques was used to collect the data at 20 sites around Weh Island and Aceh Besar. This study found 32 herbivory reef fishes species from five families in northern Acehnese reef. Densities of herbivory reef fish were varied from 27 to 104 ind./transect,while species numbers were also varied from 6 to 14 species/site. Family Acanthuriidae was the highest in species number, i.e. 19 species. Densities of herbivory reef fish in sites that were protected under the management authority of Sabang Weh Island were not significantly higher compare with sites from open access areas. Keywords: herbivory reef fish, coral reef, visual census technique, Aceh
Kajian pendahuluan analisis peramalan thunderstorm untuk penyusunan indeks dasar adaptasi kegiatan pertambakan (Suatu tinjauan meteorologi di Jakarta)
Authors: Ilhamsyah Yopi
Published: February 2023

Abstract. A meteorological prespective to analyze the Thunderstorm forecasting in Jakarta has been done. The principal indices to be adapted in a fishpond were also arranged in the study. Storms in Jakarta, so-called as Ordinary Cell Thunderstorms, are frequently arose in the afternoon, particularly during transition period on March-May and September-November in which many of them are triggered by different in surface heating. The latter emerged to an atmospheric instability and force the air parcel to rise through the atmosphere. RAOB was employed to the forecasting of Thunderstorm. A number of such indices as K and Showalter indices as well as CAPE are produced and applied to forecast the conditional instability of the troposphere. The result showed that the extension of inversion layer in ~500–300 hPa implied the shrink of humidity and might strength the convective instability. In addition, the higher amount of CAPE proved the maximum velocity of updraft which lead to a strong convection and vertical wind shear during Thunderstorm in Jakarta. On the other hand, based on the storm indices, three principal indices adapted in a fishpond were also arranged i.e. normal, moderate and risk condition.Keywords. Thunderstorm, Storm indices, Fishpond adaption
Keragaman ikan karang di perairan Pulau Makian Provinsi Maluku Utara
Authors: N Najamuddin , Ishak Samar , Ahmad Adityawan
Published: February 2023

Abstract. The objective of the present study was to identify and evaluate reef fish community structure at Makian Island. Sampling was conducted in two stations at coordinate position of 00º.22’15.75”N -127 º.25’12.00”E to 00 º.22’7.90”N - 127º. 25’17.40”E with two different depths i.e. 5 meters and 10 meters. Coral reef data were collected using line intercept transect method, while the reef fish data were taken using a census visual method. A total of 138 species of coral reef fishes were recorded during the survey belong to 47 genera and 21 families. The fish diversity on station 1 for both depths (5 meters and 10 meters) were a medium level, while on station 2 at 5 meters water depth was also a medium category, but a higher diversity was detected at 10 meters depth. The percentage coral covers on station 1 at 5 meters depth was a medium level, at 10 meters depth was classified as high covered, while on station 2 at 5 meters and 10 meters depth were classified very high percent covers.Key word. Diversity, coral, percent covers, and line intercept transect
Isolasi dan karakterisasi senyawa metabolit sekunder dari bakteri laut Streptomyces sp.
Authors: Bahi Muhammad
Published: February 2023

Abstract: Streptomyces is one of bacterial genus which has been considered as a potential source of many novel antibiotics from both terrestrial and marine microorganism. In this paper, four secondary metabolites have been isolated and characterized from a marine Streptomyces sp. B5798, namely phydroxyphenylacetic acid (2), indole-3-carboxylic acid (3), indole-3-acetic acid (4), and Macrolactin A (5), respectively. Two of them are common compounds, namely indole-3-carboxylic acid (3) and indole-3-acetic acid (4). The 3,4 dihydroxybenzaldehyde is a degradation product of phydroxyphenylacetic (2) in microorganism. Macrolactin A (5) showed cytotoxicity against brine shrimps test (A. salina). All structures of the isolated compounds were elucidated based on spectroscopic and mass spectrometry data.
Pertumbuhan dan kelangsungan hidup benih ikan nila (Oreochromis niloticus) pada beberapa konsentrasi tepung daun jaloh (Salix tetrasperma) dalam pakan
Authors: Yanti Zuraidha , A. Muchlisin Zainal , - Sugito
Published: February 2023

Abstract. The objective of the present study was to evaluate the possibility of jaloh (Salix tetrasperma) leaf  powders as alternative raw material for tilapia fish feed. Four concentrations of jaloh leafe powders  (0%, 5%, 10% and 15%) were examined in this study. The experimental fish were fed three times a day on  08.00AM, 12.00AM and 17.00PM. with feeding ration of 5% of body weight for 42 days. The one-way Anova test showed that the different concentrations of jaloh leaf powders gave a significantly effect on growth performance of tilapia larvae (p 0.05), but did not give a significant effect on their survival rate (p0.05). The Duncans test showed that the higher growth performace and survival rate were found at 5-10% of jaloh leaf powders, it was indicated that diet with 5-10% jaloh leaf powders were better than control (without jaloh leaf powders). Therefore, it is concluded that the jaloh leaf powders is suitable as alternative raws material for tilapia formulated diet at concentration of 5-10%.  Key words: Protein, carbohydrate and alternative feed Abstrak. Penelitian ini bertujuan untuk mengevaluasi kemungkinan pemanfaatan  tepung daun jaloh (S. tetrasperma) sebagai bahan baku alternatif untuk pakan ikan nila (Oreochormis niloticus). Dalam penelitian ini telah diuji beberapa tingkat proporsi tepung daun jaloh yaitu (0%, 5%, 10%, dan 15%). Pemberian pakan dilakukan tiga kali sehari, yaitu pada pukul 08.00, 12.00 dan 17.00 WIB. Ikan diberikan pakan sebanyak 5% dari berat bobot tubuhnya selama 42 hari. Hasil uji Anova satu arah menunjukkan bahwa pemberian tepung daun jaloh memberikan pengaruh nyata  terhadap pertambahan bobot badan dan laju pertumbuhan harian benih ikan nila (p0,05), namun tidak berpengaruh nyata terhadap kelangsungan hidupnya (p0,05). Uji lanjut Duncan menunjukkan bahwa penambahan tepung daun jaloh 5-10% dalam pakan memberikan hasil terbaik dari segi pertumbuhan mutlak, pertumbuhan harian dan kelangsungan hidup, dan hasil ini lebih baik berbanding kontrol (tanpa daun jaloh). Dengan demikian dapat disimpulkan tepung daun jaloh dapat dijadikan sebagai bahan baku alternatif dalam pakan ikan dengan kadar 5-10%. Kata kunci: Protein, karbohidrat dan pakan alternatif
Pengaruh fase bulan dan pasang surut terhadap kemunculan pari manta (Manta alfredi) di Perairan Karang Makassar, Taman Nasional Komodo Nusa Tenggara Timur
Authors: Ichsan Muhammad , Iriana Dulmi’ad , Yusuf Awaluddin Muhammad
Published: February 2023

Abstract. Karang Makassar is known as Manta point which is located in the Komodo National Park, Indonesia. This location is one of the habitat for manta ray. This research was conducted to find out the relationship between the appereance of manta ray with lunar pattern and tidal cycle. Observation data was collected from September to October 2012. Photo ID method was used to assess the number of manta ray appeareance. Lunar pattern data was obtained from USNO NAVY database, and tidal cycle was obtained from WX Tide Prediction Server. The result shows that from 20 dives, the highest average number of manta rays appearance was during full moon by 9,8 individual per dive. Meanwhile, during half moon and new moon were only 3 individual appearances per dive. On the other hand, based on tidal cycle, the highest manta rays appeareance was found during rising by 6,5 individual per dive, on falling by 4,4 individual per dive, and the lowest on slack by 3,4 individual per dive. We suggest that the best time for seeing manta rays in this location is during full moon and raising time.  Keywords: Manta rays; Lunar patterns; Tidal cycle; National Komodo Park  Abstrak. Perairan Karang Makassar, dikenal sebagai Manta Point yang berada di Taman Nasional (T.N.) Komodo, Indonesia. Lokasi ini merupakan salah satu habitat bagi pari manta. Penelitian kali ini dilakukan untuk mengetahui hubungan antara kemunculan  pari manta dengan fase bulan dan pasang surut. Pengambilan data dilakukan pada bulan September – Oktober 2012. Metode Photo ID dipergunakan untuk menhitung jumlah individu kemunculan pari manta. Sedangkan untuk data fase bulan diperoleh dari USNO NAVY berupa persentasi cahaya bulan, sedangkan untuk pasang surut didapatkan dari WX Tide Prediction Server. Hasil menunjukkan bahwa dari 20 kali penyelaman, rata-rata kemunculan tertinggi terjadi saat fase bulan penuh sebesar 9,8 individu per penyelaman. Pada bulan setengah jumlah kemunculan paling sedikit yaitu 3 kemunculan per penyelaman, sama dengan fase bulan baru yaitu 3 kemunculan per penyelaman. Sementara itu berdasarkan pola pasang surut, diperoleh rata-rata jumlah individu tertinggi yang muncul yaitu pada pada saat pasang sebanyak 6,5 individu per penyelaman, saat surut sebesar 4,4 individu per penyelaman, sedangkan pada saat kendur paling sedikit  yaitu sebesar 3,4 individu per penyelaman. Kami menyarankan bahwa waktu yang terbaik untuk melihat pari manta di lokasi ini adalah pada saat bulan penuh dan saat pasang.Kata kunci: Pari Manta; Fase Bulan;  Pasang Surut; Taman Nasional Komodo
Social work’s complex cloth: teaching hard history in an antebellum cotton mill
Authors: McPherson Jane
Published: February 2023

Social work defines itself as a social justice profession, yet the historical record also shows social workers resisting social change, promoting social division and contributing to social exclusion. When social workers are unaware of these ‘hard’ histories, they are unable to identify destructive professional practices or reconcile with those whom social work has harmed. In this article, I present a model for using local history – in this case, the history of the University of Georgia School of Social Work – as a catalyst to help students confront and unpack ‘hard’ history. I unravel the interwoven local histories of cotton mills, women’s charitable activities and a system of entrenched racial hierarchy, and present a method for making the historical materials available and vivid to students. I conclude that we must welcome difficult history into our professional historiography as a necessary step towards becoming the liberatory profession we need to be.
Geometric phase for twisted light
Authors: Yang Li-Ping
Published: February 2023

Polarization vectors of light traveling in a coiled optical fiber rotate around its propagating axis even in the absence of birefringence. This rotation was usually explained due to the Pancharatnam-Berry phase of spin-1 photons. Here, we use a purely geometric method to understand this rotation. We show that similar geometric rotations also exist for twisted light carrying orbital angular momentum (OAM). The corresponding geometric phase can be applied in photonic OAM-state-based quantum computation and quantum sensing.
THz optical beat-note detection with a fast superconducting hot electron bolometer operating up to 31 GHz
Authors: Torrioli G. , Forrer A. , Beck M. , Carelli P. , Chiarello F. , Faist J. , Gaggero A. , Giovine E. , Martini F. , Senica U. , Leoni R. , Scalari G. , Cibella S.
Published: February 2023

We study the performance of a hot-electron bolometer (HEB) operating at THz frequencies based on superconducting niobium nitride films. We report on the voltage response of the detector over a large electrical detection bandwidth carried out with different THz sources. We show that the impulse response of the fully packaged HEB at 7.5 K has a 3 dB cutoff around 2 GHz. Remarkably, detection capability is still observed above 30 GHz in an heterodyne beating experiment using a THz quantum cascade laser frequency comb. Additionally, the HEB sensitivity has been evaluated and an optical noise equivalent power NEP of 0.8 pW/√Hz has been measured at 1 MHz.
Design and fabrication method of holographic waveguide near-eye display with 2D eye box expansion
Authors: Ni Dongwei , Cheng Dewen , Wang Yongdong , Yang Tong , Wang Ximeng , Chi Cheng , Wang Yongtian
Published: February 2023

Augmented reality near-eye display (AR-NED) technology has attracted enormous interests for its widespread potential applications. In this paper, two-dimensional (2D) holographic waveguide integrated simulation design and analysis, holographic optical elements (HOEs) exposure fabrication, prototype performance evaluation and imaging analysis are completed. In the system design, a 2D holographic waveguide AR-NED integrated with a miniature projection optical system is presented to achieve a larger 2D eye box expansion (EBE). A design method for controlling the luminance uniformity of 2D-EPE holographic waveguide by dividing the two thicknesses of HOEs is proposed, which is easy to fabricate. The optical principle and design method of the HOE-based 2D-EBE holographic waveguide are described in detail. In the system fabrication, laser exposure fabrication method of eliminating stray light for HOEs is proposed, and a prototype system is fabricated and demonstrated. The properties of the fabricated HOEs and the prototype are analyzed in detail. The experimental results verified that the 2D-EBE holographic waveguide has a diagonal field of view (FOV) of 45°, an ultra-thin thickness of 1 mm, and an eye box of 16 mm × 13 mm at an eye relief (ERF) of 18 mm, the MTF values of different FOVs at different 2D-EPE positions can be better than 0.2 at 20 lp/mm, and the whole luminance uniformity is 58%.
Chloroform-infiltrated photonic crystal fiber with high-temperature sensitivity
Authors: Wang Yiping , Zhou Jinhang , Luo Zhenning , Ling Chen , Li Zizheng , Fan Lei , Zhao Hongchao , Yan Yong
Published: February 2023

The temperature sensor is the core part of the temperature measurement instrument, and its performance directly determines the temperature measurement accuracy. Photonic crystal fiber (PCF) is a new type of temperature sensor with extremely high potential. In this paper, we propose a high-performance, structurally simple, liquid-filled PCF temperature sensor, which is based on a SMF-PCF-SMF (single mode fiber, SMF) sandwich structure. By adjusting the structural parameters of the the PCF, it is possible to obtain optical properties that are superior to those of ordinary optical fibers. This allows for more obvious responsive changes of the fiber transmission mode under small external temperature changes. By optimizing the basic structure parameters, a new PCF structure with a central air hole is designed, and its temperature sensitivity is -0.04696 nm/°C. When filling the air holes of PCFs with temperature-sensitive liquid materials, the response of the optical field against the temperature fluctuations can be effectively enhanced. The Chloroform solution is used to selectively infiltrate the resulting PCF owing to its large thermo-optical coefficient. After comparing various filling schemes, the calculation results show that the highest temperature sensitivity of -15.8 nm/°C is finally realized. The designed PCF sensor has a simple structure, high-temperature sensitivity, and good linearity showing great application potential.
High-power supercontinuum lasers with a flat blue spectrum through pump modulation: a numerical study
Authors: Eilkaer Hansen Rasmus , Meldgaard Moltke Asbjørn , Bang Ole
Published: February 2023

We numerically investigate high-power, modulational instability-based supercontinuum sources. Such sources have spectra that reach the infrared material absorption edge and as a result the spectrum has a strong narrow blue peak (dispersive wave group velocity matched to solitons at the infrared loss edge) followed by a significant dip in the neighboring longer-wavelength region. In a wide range of applications one prefers a broader and more flat blue part within a certain minimum and maximum power spectral density. From the perspective of fiber degradation it would be desirable to achieve this at reduced pump peak powers. We show that it is possible to improve the flatness by more than a factor of 3 by modulating the input peak power, although this comes at the expense of slightly higher relative intensity noise. Specifically, we consider a standard 6.6 W, 80 MHz supercontinuum source with a 455 nm blue edge, which uses 7 ps pump pulses. We then modulate its peak power to generate a pump pulse train having two and three different sub-pulses.
Phase-shifting by polarizer rotations in a right-angle prism interferometer
Authors: Rivera-Ortega Uriel , Barcelata-Pinzon Antonio , Espinosa-Martinez M. , Saldaña-González G.
Published: February 2023

In this manuscript it is presented what we believe to be a novel and simple phase-shifting technique based on polarizer rotations, using a right angle prism as the interferometric device. It is possible to generate interference when the right angle edge of the prism is placed parallel to a linearly polarized collimated beam. In this configuration optical phase changes are presented due to the internal reflections in the prism; therefore, a linearly polarized beam turns into elliptical polarization. If the output elliptically polarized interference beam passed through a lineal polarizer, phase-shifting is generated if it rotates by an angle theta. This proposal will be sustained with simulated and experimental shifted interference patterns and with the calculation of wrapped and unwrapped phases.
Futuristic study of a criminal facial recognition system using open-source images
Authors: Kumar Ajay , Gupta Rishi
Published: February 2023

Face recognition provides an uncertainty challenge to criminal face identification. Thus, this recognition has many uses, from security to entertainment. Even if other bio-metric characteristics like iris and fingerprints are reliable, a person must be present to use them. Therefore, they are not the best tool for thieves to use for authentication. Anyone can recognize a criminal in an image by using face recognition technology in conjunction with a criminal database that contains the individual's personal information. In addition to needing great accuracy, a criminal recognition system also needs to be flexible to numerous variations in illumination, occlusion, maturity level, postures, etc. We use the Haar cascade and Histograms of oriented gradients (HOG) recognition learning systems discussed and contrasted in this study. We assessed models and HOG outperformed the criminal recognition system. We also go through several practical uses for this criminal recognition.
Enhancing THz fingerprint detection on the planar surface of an inverted dielectric metagrating: publisher’s note
Authors: Liu Xueying , Chen Wei , Ma Yongjie , Xie Yinong , Zhou Jun , Zhu Liguo , Xu Yadong , Zhu Jinfeng
Published: February 2023

This publisher’s note corrects the funding order in Photon. Res. 10, 2836 (2022)10.1364/PRJ.472114.
Age distribution of dengue cases in southern Vietnam from 2000 to 2015
Authors: Taurel Anne-Frieda , Luong Chan Quang , Nguyen Thi Thanh Thao , Do Kien Quoc , Diep Thanh Hai , Nguyen Thanh Vu , Cao Minh Thang , Hoang Thi Nhu Dao , Huynh Phuong Thao , Huynh Thi Kim Loan , Le Minh Hieu , Nealon Joshua , Moureau Annick
Published: February 2023

Background

Dengue is the most common vector-borne viral infection. In recent times, an increase in the age of cases with clinical dengue has been reported in the national surveillance system and published literature of Vietnam. This change not only alter the risk of transmission and disease burden in different populations but also will impact for prevention and control strategies. A retrospective study was conducted from 2000 to 2015 in 19 provinces of southern Vietnam to describe the changes in age distribution of dengue cases and circulating serotypes.

Methodology/Principal findings

The study is a time trend analysis of the data aggregated from the database of dengue surveillance system. The database consisted of clinically diagnosed and laboratory-confirmed cases of dengue in southern Vietnam from 2000 to 2015. In the study period, the mean age of dengue cases increased from 12.2 ± 8.8 years old (y/o) to 16.8 ± 13.3 y/o between 2000 and 2015. Majority of severe cases were observed in the age group of 5–9 y/o and 10–14 y/o. Overall, the mortality and case fatality rates (CFR) were lowest during 2010 to 2015, and all four serotypes of dengue were observed.

Conclusions/Significance

With the exception of severe form, the age distribution of clinical cases of dengue appears to be shifting towards older age groups. An increase in the mean age of clinical cases of dengue has been observed in southern Vietnam over the past decade, and the highest incidence was observed in age group of 5–14 y/o. All serotypes of dengue were in circulation.
Optimization of parameters in coherent spin dynamics of radical pairs in quantum biology
Authors: Martino Carlos F. , Jimenez Pablo , Goldfarb Max , Abdulla Ugur G.
Published: February 2023

Identification of the external electromagnetic fields and internal hyperfine parameters which optimize the quantum singlet-triplet yield of simplified radical pairs modeled by Schrödinger system with spin Hamiltonians given by the sum of Zeeman interaction and hyperfine coupling interaction terms are analyzed. A method that combines sensitivity analysis with Tikhonov regularization is implemented. Numerical results demonstrate that the quantum singlet-triplet yield of the radical pair system can be significantly reduced if optimization is pursued simultaneously for both external magnetic fields and internal hyperfine parameters. The results may contribute towards understanding the structure-function relationship of a putative magnetoreceptor to manipulate and enhance quantum coherences at room temperature and leveraging biofidelic function to inspire novel quantum devices.
Automatic detection, identification and counting of anguilliform fish using in situ acoustic camera data: Development of a cross-camera morphological analysis approach
Authors: Le Quinio Azénor , De Oliveira Eric , Girard Alexandre , Guillard Jean , Roussel Jean-Marc , Zaoui Fabrice , Martignac François
Published: February 2023

Acoustic cameras are increasingly used in monitoring studies of diadromous fish populations, even though analyzing them is time-consuming. In complex in situ contexts, anguilliform fish may be especially difficult to identify automatically using acoustic camera data because the undulation of their body frequently results in fragmented targets. Our study aimed to develop a method based on a succession of computer vision techniques, in order to automatically detect, identify and count anguilliform fish using data from multiple models of acoustic cameras. Indeed, several models of cameras, owning specific technical characteristics, are used to monitor fish populations, causing major differences in the recorded data shapes and resolutions. The method was applied to two large datasets recorded at two distinct monitoring sites with populations of European eels with different length distributions. The method yielded promising results for large eels, with more than 75% of eels automatically identified successfully using datasets from ARIS and BlueView cameras. However, only 42% of eels shorter than 60 cm were detected, with the best model performances observed for detection ranges of 4–9 m. Although improvements are required to compensate for fish-length limitations, our cross-camera method is promising for automatically detecting and counting large eels in long-term monitoring studies in complex environments.
Single-cell RNA sequencing analysis of human Alzheimer’s disease brain samples reveals neuronal and glial specific cells differential expression
Authors: Soreq Lilach , Bird Hannah , Mohamed Wael , Hardy John
Published: February 2023

Alzheimer’s disease is the most common neurological disease worldwide. Unfortunately, there are currently no effective treatment methods nor early detection methods. Furthermore, the disease underlying molecular mechanisms are poorly understood. Global bulk gene expression profiling suggested that the disease is governed by diverse transcriptional regulatory networks. Thus, to identify distinct transcriptional networks impacted into distinct neuronal populations in Alzheimer, we surveyed gene expression differences in over 25,000 single-nuclei collected from the brains of two Alzheimer’s in disease patients in Braak stage I and II and age- and gender-matched controls hippocampal brain samples. APOE status was not measured for this study samples (as well as CERAD and THAL scores). Our bioinformatic analysis identified discrete glial, immune, neuronal and vascular cell populations spanning Alzheimer’s disease and controls. Astrocytes and microglia displayed the greatest transcriptomic impacts, with the induction of both shared and distinct gene programs.
Comparison of emergency cervical cerclage and expectant treatment in cervical insufficiency in singleton pregnancy: A meta-analysis
Authors: Wei Yanfang , Wang Sumei
Published: February 2023

Objective

To compare the therapeutic effects of emergency cervical cerclage and expectant treatment in preterm birth due to cervical insufficiency in singleton pregnancy.

Methods

A combination of subject words and free words was used to search major domestic and foreign databases. According to inclusion and exclusion criteria, 23 studies were included that met the criteria and quality evaluation and data extraction was carried out. The data were analyzed using STATA 15 and the reporting was done in reference to the list of Preferred Reporting Items for Systematic and Meta-Analyses.

Results

Emergency cervical cerclage was superior to expectant treatment for the primary outcome of pregnancy prolongation (WMD = 5.752, 95% CI 5.194–6.311, 22 studies, N = 1435, I2 = 97.1%, P = 0.000). Cervical cerclage was also superior to expectant treatment for the secondary outcomes of neonatal birth weight (WMD = 1051.542, 95% CI 594.107–1508.977, 9 studies, N = 609, I2 = 96.4%, P = 0.000), neonatal Apgar 1′ (WMD = 2.8720, 95% CI: 2.105–3.639, 11 studies, N = 716, I2 = 99.0%, P = 0.000), number of live births (OR = 6.018, 95% CI 2.882–12.568, 10 studies, N = 724, I2 = 55.3%, P = 0.000), deliveries after 32 weeks (OR = 8.030, 95% CI 1.38–46.892, 8 studies, N = 381, I2 = 85.9%, P = 0.021). deliveries after 34 weeks (OR = 15.91, 95% CI 5.92–42.77, 9 studies, N = 560, I2 = 59.6%, P = 0.000), number of vaginal deliveries (OR = 3.24, 95% CI 1.32–7.90, 8 studies, N = 502, I2 = 69.4%, P = 0.018), and number of neonatal survivals (OR = 9.300, 95% CI 3.472–24.910, 10 studies, N = 654, I2 = 80.5%, P = 0.000). No difference between emergency cervical cerclage and expectant treatment was found in patients with chorioamnionitis (OR = 1.85, 95% CI 0.602–4.583, 4 studies, N = 296, I2 = 16.3%, P = 0.273).

Conclusion

Before the 28th week of pregnancy, emergency cervical cerclage can significantly prolong the gestational week and improve the neonatal survival rate, compared to expectant treatment, in women with singleton pregnancies who have a dilated uterine orifice caused by cervical insufficiency.
Marine ship instance segmentation by deep neural networks using a global and local attention (GALA) mechanism
Authors: Sun Zequn , Meng Chunning , Huang Tao , Zhang Zhiqing , Chang Shengjiang
Published: February 2023

Marine ships are the transport vehicle in the ocean and instance segmentation of marine ships is an accurate and efficient analysis approach to achieve a quantitative understanding of marine ships, for example, their relative locations to other ships or obstacles. This relative spatial information is crucial for developing unmanned ships to avoid crashing. Visible light imaging, e.g. using our smartphones, is an efficient way to obtain images of marine ships, however, so far there is a lack of suitable open-source visible light datasets of marine ships, which could potentially slow down the development of unmanned ships. To address the problem of insufficient datasets, here we built two instance segmentation visible light datasets of marine ships, MariBoats and MariBoatsSubclass, which could facilitate the current research on instance segmentation of marine ships. Moreover, we applied several existing instance segmentation algorithms based on neural networks to analyze our datasets, but their performances were not satisfactory. To improve the segmentation performance of the existing models on our datasets, we proposed a global and local attention mechanism for neural network models to retain both the global location and semantic information of marine ships, resulting in an average segmentation improvement by 4.3% in terms of mean average precision. Therefore, the presented new datasets and the new attention mechanism will greatly advance the marine ship relevant research and applications.