bluuebunny/crossref_metadata_2025 huggingface dataset:
A prática pedagógica e a metodologia adotada no ensino da Gramática Atuação dos egressos do curso de Letras da Unijuí
Authors: Rottava Lúcia , Freudenberger Francieli
Published: August 2024

Uma comparação entre o discurso pedagógico e a prática de alguns professores de Língua Portuguesa, formados no Curso de Letras da UNIJUI, permite que se reflita sobre as crenças referentes ao ensino da gramática. Os dados resultam de uma entrevista semi-estruturada, observações e gravações de aulas. A análise focalizou o cotidiano de sala de aula, quanto aos procedimentos metodológicos utilizados pelo professor. Os resultados, ainda que preliminares, evidenciam uma divergência entre o discurso pedagógico e o cotidiano na sala de aula.
Crenças sobre aprendizagem de línguas, Lingüística Aplicada e ensino de línguas
Authors: Barcelos Ana Maria Ferreira
Published: August 2024

O objetivo deste artigo é fazer uma reflexão a respeito do conceito de crenças sobre aprendizagem de línguas dentro da lingüística aplicada. Para isso, dentro de um breve histórico, teço considerações sobre como esse conceito tem sido definido e pesquisado, recentemente, no Brasil e no exterior. Concluo com implicações para o ensino e aprendizagem de línguas e com sugestões para pesquisas futuras a respeito das crenças sobre aprendizagem de línguas.
De Fernando Sabino a Machado de Assis Uma releitura de “Dom Casmurro”
Authors: Ribeiro Ormezinda Maria
Published: August 2024

Este artigo versa sobre a possibilidade de apropriação das bases teóricas da Lingüística Textual e da Análise do Discurso, numa perspectiva interdisciplinar, com vistas à análise das articulações e das múltiplas possibilidades de aplicação dessas visões no trabalho docente com alunos do ensino fundamental e médio a fim de promover o prazer da leitura de textos considerados clássicos como ''Dom Casmurro''.
Usando o ditado para ensinar a pronúncia
Authors: Blanche Patrick
Published: August 2024

Embora o ensino da pronúncia nem sempre tenha sido negligenciado, houve momentos em que real-mente foi, e esta situação não parece estar mudando, em que pese o trabalho de alguns pesquisadores importantes na área da LE. Este trabalho mostra como o ditado pode ser usado de uma maneira diferente para ensinar a pronúncia em praticamente qualquer aula de LE. Um procedimento prático é explicado em detalhes e atividades afins são delineadas. Essa metodologia de trabalho com os alunos sugere que a volta do ensino da pronúncia para a sala de aula de LE requer uma reavaliação dos métodos tradicionais, principalmente aqueles em que a pronúncia desempenhava um papel importante.
MYTHOLOGY AND POETICS OF SOCIALIST REALISM
Authors: Bogatyrev Dmitriy , Svyatoslavskiy Aleksey
Published: August 2024

The purpose of the study is to identify the artistic features of socialist realism as a cultural phenomenon. The article examines the history of the emergence of the term and the concept behind it in connection with the socio-political situation in the USSR at the turn of the 1920s — 1930s. The definition of socialist realism, enshrined in the Charter of the Union of Soviet Writers, as “a truthful, historically concrete depiction of reality in its revolutionary development” in combination with “the task of ideological alteration and education of workers in the spirit of socialism,” is critically assessed. In the work, socialist realism is presented as a method, style, literary and artistic direction; this is done in order to understand to what extent it was a phenomenon of artistic culture, and to what extent it was a propaganda ideologeme. The features of pathos, typology of heroes, and the presence of a number of regulatory principles in the poetics of socialist realism are analyzed. It is shown that socialist realism has become an important tool for the formation of the socialist mythology. The theoretical aspect of socialist realism turned out to be in many ways an attempt to synthesize a number of features inherent in realism, romanticism and classicism, and from the point of view of historical and cultural, it was an attempt to implement in artistic creativity (primarily in the content of works) an ideologeme arising from the so-called triune task of building communism, which assumed, in particular, raising human beings of a new type. The article considers a wide range of opinions on the essence of socialist realism and realism as such, expressed in the materials of the Soviet period (M. Gorky, I. V. Stalin, I. M. Gronsky, N. I. Bukharin, A. I. Ovcharenko, A. D. Sinyavsky, V. V. Kozhinov, V. N. Turbin) and in the works of modern researchers in Russia and abroad (A. Y. Ovcharenko, Yevg. Dobrenko, L. A. Spiridonova, B. M. Gasparov, H. Gunther, K. Clark, et al.). The authors of the article come to the conclusion that it is possible to single out a special socialist realist trend and stage within the framework of the Soviet period of Russian literature as an expression of a cultural and ideological paradigm, while not finding anything specific in the poetics of socialist realism that would radically distinguish it from the poetics of realism and romanticism. The concept of critical realism, which was used by the theorists of socialist realism to justify a new method based on the principle of the opposite, is seen today as redundant from the point of view of literary theory.
PROTIC POLYMERIC IONIC LIQUID OF A BLOCK OLIGOMERIC STRUCTURE WITH IONIC BONDS IN THE MAIN CHAIN
Authors:   Institute of Macromolecular Chemistry of the NAS of Ukraine, 48 Kharkivske Highway, Kyiv, 02155, Ukraine, GUMENNA MARIANA , STRIUTSKYI OLEKSANDR ,   Institute of Macromolecular Chemistry of the NAS of Ukraine, 48 Kharkivske Highway, Kyiv, 02155, Ukraine, KOZACHUK DMYTRO ,   Institute of Macromolecular Chemistry of the NAS of Ukraine, 48 Kharkivske Highway, Kyiv, 02155, Ukraine, PYLYPENKO ANDRII ,   Institute of Macromolecular Chemistry of the NAS of Ukraine, 48 Kharkivske Highway, Kyiv, 02155, Ukraine,   Dоnetsk Institute for Physics and Engineering named after O.O. Galkin of the NAS of Ukraine, 46 Nauki Ave., Kyiv 03028, Ukraine, KRAVCHENKO VIKTOR ,   L.M. Litvinenko Institute of Physical-organic Chemistry and Coal Chemistry of the NAS of Ukraine, 50 Kharkivske Highway, Kyiv 02155, Ukraine, KOVALENKO LEONID ,   V.I. Vernadsky Institute of General and Inorganic Chemistry of the NAS of Ukraine, 32/34 Academician Palladin Ave., Kyiv 03142, Ukraine, SHEVCHENKO VALERY ,   Institute of Macromolecular Chemistry of the NAS of Ukraine, 48 Kharkivske Highway, Kyiv, 02155, Ukraine
Published: August 2024

A method for the synthesis of protic polymeric ionic liquid (PIL) of a block oligomeric structure with ionic bonds in the main chain, which turns into a liquid state at temperatures below 50 °C, was developed. Ionic bonding was used to form a polymer chain. It was formed as a result of neutralization reaction between oligomers of telechelic structure with terminal acidic and basic groups. A new linear oligomer containing basic tertiary nitrogen atoms at the ends of the oligoether chain (PEO-2NEt2) was obtained by reaction of α,ω-diglycidyl ether of polyethylene glycol MW 1000 with N,N-diethylamine. A linear oligomer with terminal sulfonic acid groups (PEO-2SO3H), which is a product of the interaction of polyethylene glycol (MW 1000) with the cyclic anhydride of 2-sulfobenzoic acid, was used as an acidic linear oligomer. The synthesis of PIL [PEO-2H-2NEt2]2+ [PEO-2SO3]2- was carried out by neutralization of basic oligomer PEO-2NEt2 with the acidic oligomer PEO-2SO3H in their molar ratio of 1:1. The structure of the obtained compound was characterized by the methods of FTIR and 1H NMR spectroscopy. According to the DSC data, the synthesized PIL contains an amorphous phase with a glass transition temperature of -49.7 °С and a crystalline phase with a melting temperature of 34.5 °С. The decomposition onset temperature corresponding to 5% weight loss is 271 °C according to the TGA. The ionic conductivity of PIL studied by dielectric relaxation spectroscopy under anhydrous conditions in the range from 40 °C to 100 °C increases with increase in temperature and reaches 2.7·10-4 S/cm. The resulting compound is promising as a proton-conducting medium for various electrochemical devices.
POLYELECTROLYTE PECTIN-POLYETHYLENEIMINE COMPLEX AND TERNARY POLYELECTROLYTE-METAL COMPLEXES BASED ON IT: A MAS SPECTROMETRY STUDY
Authors:   Institute of Macromolecular Chemistry of the NAS of Ukraine, 48 Kharkivske Highway, Kyiv 02155, Ukraine, BOIKO VALENTYNA , DEMCHENKO VALERIY ,   E.O. Paton Electric Welding Institute the NAS of Ukraine, 11 Kazymyr Malevych St., Kyiv, 03150, Ukraine, RIABOV SERGII ,   Institute of Macromolecular Chemistry of the NAS of Ukraine, 48 Kharkivske Highway, Kyiv 02155, Ukraine, BORTNITSKYI VOLODYMYR ,   Institute of Macromolecular Chemistry of the NAS of Ukraine, 48 Kharkivske Highway, Kyiv 02155, Ukraine, KOBRINA LARYSA ,   Institute of Macromolecular Chemistry of the NAS of Ukraine, 48 Kharkivske Highway, Kyiv 02155, Ukraine
Published: August 2024

A polyelectrolyte complex (PEC) of pectin (polyanion) and polyethyleneimine (polycation) at an equimolar ratio of carboxylic to amino groups was synthesized. Based on it, polyelectrolyte-metal complexes (PEMC) were prepared by adsorption of copper and silver ions from 0.1 M aqueous solutions of CuSO4 and AgNO3 salts. The starting materials (pectin, polyethyleneimine), polyelectrolyte complexes, and polyelectrolyte-metal complexes with Cu2+ and Ag+ were characterized by pyrolysis mass spectrometry (PMS). The PMS results (total ionic current, amount of volatile products, their specific intensity) indicate significant differences in the behavior of the studied objects during pyrolysis and confirm the formation of a polyelectrolyte complex between pectin and polyethyleneimine. It was found that PEC is thermally less stable than the starting materials (pectin and PEI), probably due to electrostatic interaction and corresponding redistribution of electron density between atoms in the macromolecules of pectin and PEI due to complexation. Differences in the thermal behavior of copper- and silver-containing PEMC are caused by complexation processes in these compounds and the different chemical structures of the obtained samples. The kinetics of the total ionic current during the pyrolysis of pectin-PEI complexes with Cu2+ at a temperature of 170 °С and with Ag+ at a temperature of 150 °С was studied and it was found that PEMC are thermostable for 30 min at the given temperature. Such PMS results provide evidence for the possibility of forming copper- and silver-containing nanocomposites by thermochemical reduction of Cu2+ or Ag+ ions in the studied polyelectrolyte-metal complexes based on PEC pectin-polyethyleneimine. The previously proposed mechanism of thermochemical reduction of Cu2+ and Ag+ ions during the synthesis of the corresponding nanocomposites was confirmed.
GUANIDINE-CONTAINING ALIPHATIC OLIGOMERS WITH BACTERICIDAL ACTIVITY
Authors:   Institute of Macromolecular Chemistry of the NAS of Ukraine, 48 Kharkivske Highway, Kyiv, 02155, Ukraine, VORTMAN MARYNA , FURTAT IRYNA ,   National University of Kiev Mohyla Academy, 2 Hryhoriya Skovorody St., Kyiv, 04655, Ukraine, VAKULIUK POLINA ,   National University of Kiev Mohyla Academy, 2 Hryhoriya Skovorody St., Kyiv, 04655, Ukraine, LEMESHKO VALENTYNA ,   Institute of Macromolecular Chemistry of the NAS of Ukraine, 48 Kharkivske Highway, Kyiv, 02155, Ukraine, PYLYPENKO ANDRII ,   Donetsk Institute for Physics and Engineering named after O.O. Galkin, National Academy of Sciences, SHEVCHENKO VALERY ,   Institute of Macromolecular Chemistry of the NAS of Ukraine, 48 Kharkivske Highway, Kyiv, 02155, Ukraine
Published: August 2024

A method for the synthesis of reactive aliphatic guanidine oligomers (GO) of different MM by the reaction of oligomeric oxyalkylaliphatic diepoxide with guanidine by varying the ratio of the starting components with subsequent neutralization of the obtained product with hydrochloric acid was developed. A characteristic feature of the structure of the obtained GO oligomers is their amphiphilicity, with the presence of hydroxy-containing guanidine fragments both at the ends and inside the chain. The obtained oligomers are reactive to further chemical transformations. The chemical structure of GO was characterized by FTIR and 1H-NMR spectroscopy, molecular weight was determined by liquid chromatography and titration data. The bactericidal properties of aliphatic guanidine oligomers against a number of gram-positive (Micrococcus luteus, Rhodococcus erythropolis, Rhodococcus rubber, Bacillus megaterium, Bacillus subtilis, Bacillus cereus) and gram-negative bacteria (Escherichia coli, Pseudomonas aeruginosa, Serratia marcescen), depending on the MW of GO were investigated. The minimum inhibitory concentration of aliphatic guanidine oligomers against the studied bacterial strains was determined. It has been shown that the oligomer with the highest content of guanidine fragments has the greatest bactericidal activity and, accordingly, the lowest minimum inhibitory concentration against gram-positive and gram-negative bacteria. The reactive guanidine oligomers obtained by analogy with polyhexamethylene guanidine chloride can be recommended as substances with biocidal and fungicidal properties. In addition, the inherent reactivity of the synthesized GO makes them promising for obtaining various new types of polymers and composites based on them.
DEVELOPMENT AND RESEARCH OF COMPOSITE MATERIALS WITH DACARBAZINE BASED ON POLYURETHANE-UREA WITH FRAGMENTS OF POLYVINYL ALCOHOL-POLYETHYLENE GLYCOL GRAFT COPOLYMER IN THE STRUCTURE
Authors:   Institute of Macromolecular Chemistry of the NAS of Ukraine, 48 Kharkivske Highway, Kyiv, 02155, Ukraine, VISLOHUZOVA TETIANA , ROZHNOVA RITA ,   Institute of Macromolecular Chemistry of the NAS of Ukraine, 48 Kharkivske Highway, Kyiv, 02155, Ukraine, KISELOVA TETIANA ,   Institute of Macromolecular Chemistry of the NAS of Ukraine, 48 Kharkivske Highway, Kyiv, 02155, Ukraine, KOZLOVA GALYNA ,   Institute of Macromolecular Chemistry of the NAS of Ukraine, 48 Kharkivske Highway, Kyiv, 02155, Ukraine
Published: August 2024

Based on diisocyanate prepolymer (DPP), the series of polyurethane-urea (PUU) with fragments of polyvinyl alcohol-polyethylene glycol (PVA-PEG) graft copolymer and 4,4’-diaminodiphenylmethane (DADPh) macrochain extender in the structure at different molar ratios of DPP:DADPh:PVA-PEG (1.0:0.7:0.3; 1.0:0.8:0.2; 1.0:0.9:0.1) were synthesized. Composite materials with the drug dacarbazine (DAС) in the amount of 1.0 wt.% based on the obtained PUU were developed. Studies of the structure and properties of PUU and composite materials with DAC based on them were carried out. The immobilization of DAC was found to be due to intermolecular hydrogen bonds by means of IR spectroscopy. According to the results of physical-mechanical tests, the introduction of DAC into the composition of PUU causes a non-significant decrease in the physical-mechanical properties, which is probably associated with a decrease in the packing density of macrochains of the polymer matrix. According to DSC, the studied systems are single-phase with a glass transition temperature (Tg) ranging from -12.50 to -31.99 °C. The introduction of DAC into the composition of PUU causes an increase in Tg and the specific heat capacity at the values of the glass transition temperature, which can be caused by a change in chain mobility due to the introduction of the filler and is correlated with the data of physical-mechanical tests. According to the results of hydrophilicity studies the introduction of PVA-PEG graft-copolymer into the PUU structure and increasing its content leads to an increase in hydrophilicity, which will contribute to a prolonged release of DAC from the polymer matrix. Therefore, the obtained composites with DAC are promising materials that can be used in medical practice as biologically active polymeric materials with a prolonged effect of an anticancer drug.
KAJIAN RISIKO IKAN-IKAN ASING DI WADUK CIRATA, JAWA BARAT
Authors: Sentosa Agus Arifin , Yuliana Ernik , Astuti Lismining Pujiyani
Published: August 2024

Waduk Cirata telah terindikasi terdapat ikan-ikan asing, namun belum terdapat kajian risikonya. Penelitian ini bertujuan untuk mengidentifikasi risiko keberadaan ikan-ikan asing di Waduk Cirata. Penelitian dilakukan pada bulan Desember 2021 hingga Februari 2022 di enam stasiun pada Waduk Cirata, Jawa Barat dengan metode survei lapangan. Analisis data dilakukan dengan indeks relatif penting dan penilaian risiko berdasarkan Pedoman Analisis Risiko Spesies Asing Invasif. Hasil menunjukkan bahwa teridentifikasi sebanyak 17 spesies ikan asing (65,38%) dari total 26 jenis ikan yang tertangkap di Waduk Cirata selama periode penelitian. Ikan nila (Oreochromis niloticus) memiliki kelimpahan yang tertinggi (34,70%) diikuti oleh ikan oskar (Amphilophus citrinellus) sebesar 11,86%. Risiko keberadaan ikan-ikan asing di Waduk Cirata terdiri atas 29,4% termasuk ikan asing kategori berisiko tinggi dan sisanya (70,6%) memiliki risiko sedang. Ikan asing berisiko tinggi adalah ikan oskar. Keberadaan ikan-ikan asing dengan tujuan introduksi tertentu diperbolehkan setelah melalui kajian risiko. Ikan-ikan asing yang invasif, berbahaya dan/atau merugikan yang perlu dilakukan pengendalian populasi hingga pemusnahan di Waduk Cirata adalah: Amphilophus citrinellus, Cichlasoma trimaculatum, Hemichromis elongatus, Mayaheros urophthalmus, dan Parachromis managuensis.Cirata Reservoir has indicated the presence of exotic fishes, but there has been no risk assessment. This study aimed to identify the risk of alien fishes in the Cirata Reservoir. The research was conducted from December 2021 to February 2022 at six stations in the Cirata Reservoir, West Java, with a field survey method. Data was analyzed by relative importance index and risk assessment based on the Guidelines for Risk Analysis of Invasive Alien Species. The results showed there are 17 alien fish species (65.38%) from 26 fish species caught during the study. The Nile tilapia (Oreochromis niloticus) had the highest abundance (34.70%) followed by the Midas cichlid (Amphilophus citrinellus) at 11.86%. The risk of the alien fishes in the Cirata Reservoir comprised 29.4% of the high risk and 70.6% of the moderate risk. The high risk of alien fishes was the Midas cichlid. Alien fish introduction for certain purpose was allowed after having a risk assessment. The invasive, dangerous and/or harmful alien fishes that need to be controlled and eradicated in the Cirata Reservoir were: Amphilophus citrinellus, Cichlasoma trimaculatum, Hemichromis elongatus, Mayaheros urophthalmus, and Parachromis managuensis.
KARAKTERISTIK BIOLOGI IKAN PARI KEKEH (Rhynchobatus spp.) SEBAGAI TANGKAPAN SAMPINGAN DI PERAIRAN ACEH JAYA
Authors: Hermansyah Rizky Fajar , Taryono Taryono , Zairion Zairion , Adrianto Luky , Zulfikar Andi , Booth Hollie , Ichsan Muhammad
Published: August 2024

Ikan pari kekeh (Rhynchobatus spp.) adalah salah satu jenis ikan yang dilindungi dan memiliki nilai ekonomis tinggi. Tingginya harga jual pari kekeh berdampak pada meningkatnya usaha tangkap serta kerusakan habitat pari kekeh yang hidup berasosiasi dengan ikan target nelayan. Informasi terkait aspek biologi sangat berguna bagi pembuat kebijakan dalam memanfaatkan sumberdaya yang berkelanjutan. Tujuan penelitian ini adalah memberikan informasi mengenai nisbah jenis kelamin ikan yang tertangkap, sebaran ukuran panjang, dan potensi sumber daya ikan pari kekeh (Rhynchobatus spp.) di perairan Aceh Jaya. Pengumpulan data pendaratan pari kekeh meliputi jenis kelamin, panjang total dan jumlah trip melaut pada periode tahun 2017-2021. Jumlah tangkapan total pari kekeh yang didaratkan sebanyak 191 ekor yang terdiri dari Spesies Rhynchobatus australiae sebanyak 133 ekor (69,63%), Rhynchobatus laevis sebanyak 55 ekor (28,80%) dan Rhynchobatus springeri sebanyak 3 ekor (1,57%). Ukuran pari kekeh yang tertangkap didominasi oleh ikan muda (immature), yaitu berada pada kelas panjang 65-86cm. Nisbah jenis kelamin ikan jantan dan betina 1:2,41 menunjukan hasil yang tidak seimbang. CPUE menunjukan nilai rata-rata yang fluktuatif, hubungan hasil tangkapan dengan upaya yaitu positif signifikan dengan persamaan linear y = 0,6687x + 1,6338 dengan R2 =0,9706 atau r = 0,9852 yang dapat diartikan bahwa setiap peningkatan upaya berbanding lurus dengan peluang pari kekeh yang tertangkap.Wedgefish (Rhynchobatus spp.) is one of the protected fish species that has high economic value. The high selling price of the wedgefish has an impact on increasing fishing efforts and damage to the habitat of the wedgefish that live in association with the target fish of fishermen. Information related to biological aspects is beneficial for policymakers in utilizing sustainable resources. The purpose of this study was to provide information on the sex ratio of wedgefish, length distribution, and potential resources of the wedgefish in the waters of Aceh Jaya. The wedgefish landing data collection included sex, total length, and the number of fishing trips from 2017 to 2021. The total number of wedgefish obtained was 191. The number consisted of 133 fishes from the Rhynchobatus australiae (69.63%), 55 fishes from Rhynchobatus laevis (28.80%), and 3 fishes from Rhynchobatus springeri (1.57%). Most of the wedgefish caught were immature fish with a size of 65-86 cmTL. The sex ratio of male and female fish was 1:2.41, showing unbalanced condition between males and females. CPUE aspect showed a fluctuating average value. The relation between the catch and effort was positive and significant with alinear equation of y = 0.6687x + 1.6338 with R2 = 0.9706 or r = 0.9852, meaning that increasing fishing effort was proportional to the possibility of a wedgefish being caught.
Front Matter Agustus 2023
Authors: Kasim Muh
Published: August 2024

Front Matter Agustus 2023
Back Matter Agustus 2023
Authors: Kasim Muh
Published: August 2024

Back Matter Agustus 2023
HABITUS COMPARASION, GROWTH PATTERN AND CONDITION OF CONVICT CICHLID (Amatitlania nigrofasciata GUNTHER, 1986) IN THREE LAKES ECOSYSTEMS IN BALI
Authors: Parawangsa I Nyoman Yoga , Tampubolon Prawira Atmaja , Saputra Dewa Gde Tribodhi , Pertami Nyoman Dati
Published: August 2024

Convict cichlid (Amatitlania nigrofasciata) belonging to the Cichilidae family has inhabited in Tamblingan Lake, Buyan Lake and Beratan Lake. The existence of this fish species is suspected due to accidental introduction activities. The aims of this study ware to reveal differences in habitus, growth patterns and conditions of convict cichlid in the three lakes on the island of Bali. Samples of convict cichlid were taken by bubu traps, that placed in the littoral zone of the lake. 19 morphometric characters were measured using a digital caliper, then each fish sample was weighed. The growth pattern and condition of convict cichlid are known by using the equation of the length-weight relationship and the condition factor. There were 888 individuals of convict cichlid caught during this study, consisted of 385 fish from Tamblingan Lake, 371 fish from Buyan Lake, and 132 fish from Beratan Lake. Moreover, 108 fish consisting of 36 fish from each lake were further analyzed by measuring 17 additional morphometric characters. The results of measuring the morphometric characters of the observed convict cichlid had different variations for the characters of head length and predorsal length. There was diversity for several morphometric characters of the convict cichlid in Buyan Lake which are a collaboration of characters between the convict cichlid in Tamblingan Lake and in Beratan Lake, namely on the basic characteristics of the anal fin, dorsal fin base, body length, postorbital length, and tail height. The growth pattern of this species in the three lakes was negative allometric and the condition of this fish species was in good condition with the average value of condition factor ranging from 0.95–1.05.
POPULATION PARAMETERS OF RED SNAPPER (Lutjanus malabaricus) IN ARAFURA SEA FMA 718
Authors: Ayuningtyas Okky Arista , Kasim Kamaluddin , Imran Zulhamzah , Kodiran Taryono
Published: August 2024

The utilization of red snapper (Lutjanus malabaricus) in Arafura waters is already at its optimum point and is classified as over-exploited. Information on population parameters is needed so that management can be sustainable. This study aims to determine several aspects of population parameters (Lc, Lm, L, t0, K, Z, M, F, E). The data collection method uses red snapper sampling including sex, length, and total weight in the 2021-2022 fishing period at PPP Mayangan, Probolinggo. The total number of red snapper samples was 3,077 with the smallest length being 19 cm and the largest being 89 cm. The results showed a relationship between length and weight W = 4,106.10-2 L1,730 with a value of b = 1,730, meaning that b < 3 indicates a negative allometric growth pattern. Average length caught (Lc = 50 cmTL) < Average length at maturity (Lm = 52 cmTL). Based on the Von Bertalanffy model formula, the growth parameter values are obtained, namely asymptotic length (L∞) = 96 cm, growth coefficient (K) = 0.72 per year, and age at zero length (t0) = -0.789. The growth equation is Lt = 96[1-e-0,72 (t-(-0,789))]. The value of natural mortality (=M) is 1.04 per year and the value of mortality due to fishing (=F) is 1.39 per year so the total mortality (=Z) is 2.43 per year. The exploitation value/utilization rate (=E) is 0.57. This shows that the utilization level has experienced more capture and reached the optimum level.
KARAKTERISTIK PERIKANAN JARING ARAD DAN SEBARAN PANJANG UDANG DOGOL (Metapenaeus ensis) DI PERAIRAN MEULABOH
Authors: Yusuf Helman Nur , Baihaqi Baihaqi , Hufiadi Hufiadi , Sayuti Kamil , Tirtadanu Tirtadanu , Nurulludin Nurulludin , Mahiswara Mahiswara , Utama Andria Ansri , Sepri Sepri , Pane Andina Ramadani
Published: August 2024

Umumnya, para nelayan di wilayah Meulaboh dan juga sepanjang pantai di Aceh Barat memanfaatkan jaring arad atau mini trawl sebagai alat untuk dapat menangkap hasil laut seperti udang dan ikan demersal. Selama periode antara bulan Maret hingga Desember 2019, penelitian ini dilaksanakan dengan tujuan untuk dapat memahami aspek perikanan yang terkait dengan penggunaan jaring arad di wilayah perairan Meulaboh, serta untuk meneliti udang dogol (Metapenaeus ensis) yang merupakan tangkapan hasil laut mayoritas pada saat menggunakan jaring arad. Penggunaan jaring arad saat beroperasi dilakukan pada kedalaman perairan antara 5 hingga 35 meter. Penangkapan dilaksanakan sebanyak 6-10 kali dalam satu perjalanan, dengan durasi trip kurang lebih yaitu selama 1-2 hari. Hasil operasi penangkapan yang dilakukan mencakup 26 jenis, termasuk 8 jenis udang, 4 jenis krustasea, 2 jenis cumi-cumi, dan 12 jenis ikan. Komposisi jenis didominasi udang cakrek (Harpisquilla harpax) 11,5%, petek (Equulites leuciscus) sebesar 9,7%, buntal (Thorguigner tubercullife) 8,2%, kepiting kecil (Charybdis affinis) 6,9%, udang dogol (Metapenaeus ensis) 6,8% ikan lidah (Cynoglossus sp) 6,1%, udang kelong (Fenneropenaeus indicus)6,0%, baronang (Siganus sp.) 5,1% bilis (Herklotsichthys dispilonotus) 4,8%, tetengkek (Megalopsis cordilla) 4,0% dan lainnya dibawah 4%. Nilai kelimpahan udang paling banyak pada Agustus sebesar 36,66 kg/trip dan paling sedikit terdapat pada bulan April sebanyak 29,13 kg/trip. Sedangkan kelimpahan udang jenis dogol paling banyak terdpat pada bulan Juni yaitu sebesar 4,38 kg/trip dan terendah pada Desember. 1,88 kg/trip. Lokasi penangkapan jaring arad terdapat di perairan Meulaboh, dengan dugaan bahwa puncak musim penangkapan terjadi pada bulan Maret hingga Oktober. Panjang udang jingga yang berhasil ditangkap menggunakan jaring arad bervariasi antara 14,0 hingga 31,9 mmCL, dengan panjang pertama kali tertangkap (Lc) mencapai 21,81 mm, dan panjang pertama kali matang gonad (Lm) sebesar 23,04 mm.
KLASIFIKASI TINGKAT KEMATANGAN GONAD DAN PEMIJAHAN IKAN TONGKOL KOMO BETINA (EUTHYNNUS AFFINIS (CANTOR, 1849)) YANG DIDARATKAN DI KEDONGANAN- BALI
Authors: Arnenda Gussasta Levi , Wiratmini Ngurah Intan , Wijana I Made Sara
Published: August 2024

Wilayah Pengelolaan Perikanan Republik Indonesia di Samudera Hindia dengan kode WPP-RI 572 dan 573 kaya akan potensi sumber daya ikan yang didominasi oleh ikan Tongkol Komo (Euthynnus affinis (Cantor, 1849). Pemanfaatan ikan Tongkol Komo telah melampaui batas optimal dengan tekanan penangkapan yang tinggi. Biologi reproduksi Tongkol Komo perlu diketahui untuk memastikan keberadaannya di alam. Tujuan dari penelitian ini adalah Tahap Kematangan Gonad (TKG) dan pemijahan. Penelitian dilaksanakan pada bulan Februari, April, Juni hingga Desember 2020. Pengumpulan data dilakukan melalui pengamatan langsung di Pangkalan Pendaratan Ikan (PPI) Kedonganan. Teknik pengambilan sampel yang digunakan dalam penelitian ini adalah purposive stratified sampling. Analisis histologi di Laboratorium Penelitian Perikanan Tuna, Denpasar. Hasil yang diperoleh bahwa pola pertumbuhan tuna komo didominasi oleh pola alometrik positif dengan sebaran panjang 20-65cmFL. Ukuran pertama kali matang gonad (Lm) untuk betina 44,07 cmFL. Tingkat Kematangan Gonad (TKG) pada klasifikasi makroskopis dan mikroskopis perkembangan gonad didominasi oleh ikan yang belum matang gonad. Musim pemijahan pada bulan Agustus dan Desember.
Front Matter Desember 2023
Authors: Kasim Muh
Published: August 2024

Front Matter Desember 2023
VARIASI DAN KELIMPAHAN PLANKTON DI PERAIRAN BRONDONG, KABUPATEN LAMONGAN
Authors: Handayani Muliawati , Nuzapril Mulkan
Published: August 2024

Keberadaan plankton di suatu perairan digunakan sebagai indikator kuliatas air dan produktivitas primer perairan. Perairan Brondong dikenal sebagai salah satu penghasil ikan dari sektor perikanan tangkap di Pesisir Utara Jawa. Tujuan penelitian ini adalah untuk mengetahui variasi dan kelimpahan plankton serta kualitas air di Perairan Brondong, Lamongan. Sampling dilakukan pada 10 titik yang perairan sejajar dengan garis pantai menggunakan purposive sampling. Penelitian ini menggunakan metode deskriptif eksploratif untuk identifikasi plankton dan parameter fisika kimia perairan serta analisis PCA untuk mengetahui korelasi antar variabel. Ditemukan 32 genus jenis fitoplankton dan 11 genus zooplankton. Ceratium adalah genus yang paling banyak ditemukan pada komunitas fitoplankton. Kelimpahan Ceratium yang tinggi di suatu perairan mengindikasikan kuaitas air yang tercemar. Sedangkan genus zooplankton dengan kelimpahan tertinggi adalah Nauplius. Nauplius merupakan hewan kecil dari yang sedang mengalami perkembangan stadia, biasanya berasal dari golongan Copepoda.  Indeks komunitas fitoplankton berada pada keanekaragaman yang sedang, sedangkan zooplankton tergolong keanekaragaman yang rendah. Indeks keseragaman keduanya tergolong kategori labil dan indeks dominasi tergolong rendah. Faktor utama yang memiliki korelasi erat dengan kelimpahan baik itu fitoplankton maupun zooplankton adalah parameter suhu, DO dan pH. Pemanfaatan pesisir dengan aktivitas yang beragam diduga berpengaruh terhadap kualitas air dan kelimpahan plankton.
Analisis Distribusi dan Densitas Ikan di Laut Banggai Menggunakan Metode Hidroakustik dan Visualisasi GIS-Dashboard
Authors: Windra Alivio , Manik Henry Munandar , Somantri Lili
Published: August 2024

Estimasi stok ikan berupa distribusi dan densitasnya, sangat penting untuk manajemen perikanan tangkap suatu kawasan perairan. Teknologi hidroakustik umumnya digunakan untuk mengestimasi stok ikan secara real time. Pada tahun 2022, BRIN dan IPB melakukan pengukuran data akustik di Laut Banggai sebagai bagian dari "Banggai Upwelling Dynamics Exploration and Experiment" untuk mengestimasi stok ikan. Hasil analisis hidroakustik menunjukkan, total densitas ikan di Laut Banggai adalah 527.914 ikan km-2. Ikan berukuran sangat kecil (< 12 cm) memiliki densitas tertinggi yakni 292.471 ikan km-2, sedangkan ikan berukuran kecil (12 cm - 28 cm) dan berukuran besar (28 cm - 58 cm) masing-masing memiliki densitas 98.472 ikan km-2 dan 124.519 ikan km-2. Ikan berukuran sangat besar (> 58 cm) hanya memiliki densitas 12.452 ikan km-2. Ikan lebih banyak ditemukan di perairan timur Pulau Banggai dan perairan utara Pulau Taliabu. Lapisan epipelagik (0 hingga -200 meter) memiliki potensi terbesar, dengan densitas ikan tertinggi pada kategori ikan berukuran sangat kecil, diikuti oleh ikan berukuran besar dan berukuran kecil. Untuk meringkas hasil analisis distribusi dan densitas ikan, data dan informasi divisualisasikan lewat GIS-Dashboard. Dashboard dapat mengintegrasikan tampilan peta serta grafik, dan menyajikan informasi dengan lebih menarik dan lebih mudah dipahami. Dashboard memberikan gambaran menyeluruh tentang informasi distribusi spasial ikan di Laut Banggai, sehingga penggunaan GIS-Dashboard sangat bermanfaat dalam kegiatan manajemen perikanan.
PEMETAAN ZONA POTENSI PENANGKAPAN RAJUNGAN (Portunus pelagicus) BERBASIS SATELIT AQUA MODIS DI TELUK SANTONG SUMBAWA
Authors: Sativa Denianto Yoga , Islamiah Evita Rosalinda , Kalih Lalu Achmad Tan TWS
Published: August 2024

Rajungan merupakan komoditi perikanan dengan nilai jual cukup tinggi, namun nelayan di Teluk Santong sampai saat ini masih kesulitan dalam menentukan daerah penangkapan rajungan. Oleh karena itu diperlukan informasi mengenai daerah penangkapan rajungan yang potensial. Tujuan penelitian ini adalah untuk memetakan zona potensi penangkapan rajungan berbasis satelit Aqua Modis dan menganalisa keterkaitan SPL dan klorofil-a terhadap sebaran zona potensi penangkapan rajungan. Metode yang digunakan adalah metode pengindraan jauh dengan interpretasi digital untuk memperoleh data sebaran zona potensi penangkapan rajungan. Survei lapangan dilakukan dengan cara pengambilan titik sampel untuk uji akurasi hasil interpretasi. Suhu permukaan laut dan klorofil-a diperoleh dengan mengunduh citra satelit Aqua Modis. Analisis yang digunakan dalam penelitian ini adalah analisis regresi linear yang berfungsi untuk melihat pengaruh suhu permukaan laut dan klorofil-a terhadap hasil tangkapan rajungan. Hasil yang diperoleh adalah sebaran SPL berkisar antara 28,9⁰C sampai 31,6⁰C dengan nilai rata-rata 30,22⁰C, Sedangkan klorofil-a berkisar antara 0,27mg/m3 sampai 2,34mg/m3dengan nilai rata-rata 0,83mg/m3. Hasil tangkapan rajungan selama enam bulan yaitu sebanyak 454,8 kg, hasil tangkapan tertinggi di temukan pada bulan Desember dan hasil tangkapan paling rendah di bulan Februari. Nilai akurasi yang diperoleh mencapai 82% sehingga hasil interpretasi citra satelit layak diterima.
STRUKTUR UMUR, LAJU PERTUMBUHAN DAN MORTALITAS IKAN MANGGABAI (Glossogobius giuris) DI DANAU LIMBOTO
Authors: Nursinar Sitti , Kalaka Sri Rahayu
Published: August 2024

Ikan Manggabai, secara ilmiah dikenal dengan nama Glossogobius giuris merupakan ikan ekonomis penting yang banyak ditemukan di Danau Limboto dan sangat digemari mayoritas penduduk Provinsi Gorontalo. Saat ini terjadi penurunan populasi ikan tersebut sehingga menyebabkan harga pasarnya meningkat. Penurunan ini disebabkan oleh mengecilnya dan menyempitnya Danau Limboto yang menjadi habitat alami spesies ini. Penelitian ini berlangsung di Danau Limboto, Kabupaten Gorontalo, pada bulan Februari hingga Juli 2023. Pengumpulan data pada penelitian ini berupa observasi dan tinjauan literatur yang ada untuk mengkategorikan ikan menurut umur dan laju pertumbuhan serta mortalitasnya. Data dianalisis dengan menggunakan soft ware FISAT II. Pengambilan sampel dilakukan dua kali seminggu selama tiga bulan. Hasil penelitian mengungkapkan bahwa ikan manggabai yang ditangkap dari Danau Limboto memiliki panjang tubuh berkisar antara 49,00 - 149,50 mm. Ikan-ikan ini diklasifikasikan ke dalam empat kelompok umur yang berbeda: kelompok pertama (L1) memiliki panjang rata-rata 81,96 mm, kelompok kedua (L2) berukuran sekitar 90,31 mm, kelompok ketiga (L3) memiliki rata-rata panjang 98,48 mm, dan kelompok keempat (L4) mencapai panjang rata-rata 125,01 mm. Laju pertumbuhan (k) sebesar 0,76. Laju mortalitas total (Z) = 0,28 per tahun; mortalitas alami (M) = 0,05 per tahun dan mortalitas penangkapan (F) = 0,33 per tahun. Hasil penelitian menunjukkan bahwa ikan manggabai yang ditangkap di Danau Limboto sedang dalam kelompok umur matang gonad, mempunyai laju pertumbuhan yang cepat serta tingkat kematian karena penangkapan (F) yang tinggi.
PENDARATAN IKAN PARI (BATOIDEA) PADA MUSIM BARAT DI PPI UJUNG BAROH, ACEH BARAT
Authors: Ahmad Dimas Kusmayadi , Fuadi Afdhal , Khairi Ikhsanul , Amarullah Teuku
Published: August 2024

Penangkapan dan Tingkat reproduksi yang rendah merupakan ancaman terbesar bagi populasi hiu dan pari (selanjutnya disebut sebagai elasmobranch), hampir sepertiga jenis dalam status terancam. Populasi pari mengalami tekanan yang lebih tinggi dibanding hiu, khususnya di kawasan Asia Tenggara. Meskipun begitu, Indonesia merupakan salah satu negara dengan pendaratan hiu dan pari yang dominan bagin ditingkat global maupun regional. Kondisi tersebut dapat dicegah dengan pengelolaan perikanan untuk menjamin berkelanjutan populasi pari. Salah satu informasi yang diperlukan adalah pemetaan penangkapan dan musim penangkapan sebagai indikasi habitat kritis pari. Tujuan penelitian adalah menyediakan informasi jenis, jumlah, ukuran dan sebaran daerah penangkapan pari saat musim barat. Penelitian ini dilaksanakan bulan Desember 2022 hingga Februari 2023 di PPI Ujong Baroh, Aceh Barat. Informasi dikumpulkan dengan survei onboard perikanan jaring insang tetap dan pukat hela, enumerasi di lokasi pendaratan dan pemetaan sebaran daerah penangkapan. Sebanyak 2.232 individual pari didaratkan selama periode studi. Pendaratan didominasi 10 jenis yakni Maculabatis macrura (91,44%), Neotrygon caeruleopunctata (2,11%), Taeniurops meyeni (1,97%), Gymnura zonura (1,88%), Pateobatis uarnacoides (0,94%), Himantura undulata (0,63%), Rhynchobatus australiae (0,45%), Aetomylaenus nichofii (0,45%), Himantura leoparda australiae (0,09%) dan Mobula kuhlii australiae (0,04%). Pari yang didaratkan umumnya belum matang gonad 94,08%. Daerah penangkapan pari umumnya berjarak 2.16 mil  atau nmil dari PPI Ujung Baroh.
Front Matter April 2024
Authors: Kasim Muh
Published: August 2024

Front Matter April 2024
Mixed Fair Division: A Survey
Authors: Liu Shengxin , Lu Xinhang , Suzuki Mashbat , Walsh Toby
Published: August 2024

Fair division considers the allocation of scarce resources among agents in such a way that every agent gets a fair share. It is a fundamental problem in society and has received significant attention and rapid developments from the game theory and artificial intelligence communities in recent years. The majority of the fair division literature can be divided along at least two orthogonal directions: goods versus chores, and divisible versus indivisible resources. In this survey, besides describing the state of the art, we outline a number of interesting open questions and future directions in three mixed fair division settings: (i) indivisible goods and chores, (ii) divisible and indivisible goods (mixed goods), and (iii) indivisible goods with subsidy which can be viewed like a divisible good.
Not every finite CP is a phase
Authors: Kim Boram
Published: August 2024

This paper proposes that phases are extended projections containing all the projections in the relevant functional sequence, and that extended projections lacking lower projections in the sequence are in turn not phases. The claim is motivated and supported by a detailed investigation of finite ECM in Korean, where embedded subjects are assigned accusative case across finite CP boundaries. I argue that finite ECM occurs in Korean when the embedded clause lacks a T projection in the verbal domain. A typology of clausal complementation emerges, distinguishing defective finite CPs as distinct entities from full CPs in terms of syntactic locality. The proposal also explains the puzzling individual-level restriction in Korean ECM: a GEN operator must occur in the structure to stopgap the semantic effects of missing T, namely to render the embedded finite clause a proposition of type t. The defective CP analysis extends to other languages exhibiting crossclausal finite A-dependency exclusively with defective CPs.
Botulinum toxin type A inhibits the formation of hypertrophic scar through the JAK2/STAT3 pathway
Authors: Fan Yan , Guo Xuesong , Tian Yu , Li Jie , Xi Hongwei
Published: August 2024

Hypertrophic scar (HS) is a fibrous proliferative disorder that occurs in the dermis after skin injury. Studies have confirmed that Botulinum toxin type A (BTA) is effective in scar prevention and treatment. However, the specific mechanism remains uncertain. Hypertrophic scar fibroblasts (HSFs) and normal skin fibroblasts (NSFs) from the skin tissues of HS patients were isolated and cultured. Western blot analysis was conducted to measure the expression of JAK2/STAT3 pathway-related proteins. HSFs were treated with the JAK2 inhibitor (AG490) or agonist (C-A1). The CCK-8 assay, EdU staining, scratch-wound assay and transwell assay were used to examine the biological properties of HSFs. Western blot, immunofluorescence, and Sirius red staining were used to assess the fibrosis of HSFs. Additionally, a mouse full-thickness wound model was constructed to investigate the role of BTA in wound healing. The results showed that the JAK2 and STAT3 phosphorylation levels were markedly increased in HS tissues and HSFs. AG490 treatment reduced cell viability, proliferation and migration capacity, and inhibited the fibrosis of HSFs, whereas C-A1 treatment had the opposite effect. BTA treatment inhibited the JAK2/STAT3 pathway. BTA reduced cell viability, proliferation and migration ability, and inhibited the fibrosis of HSFs, while C-A1 intervention weakened the impact of BTA. Meanwhile, BTA promoted wound healing and reduced collagen deposition in vivo. In conclusion, BTA inhibited the JAK2/STAT3 pathway, which in turn hindered the proliferation, migration and fibrosis of HSFs, and promoted wound healing in mice.
scNT-seq2: single-cell metabolically labelled new RNA tagging sequencing for time-resolved analysis of gene expression in single cells v1
Authors: Qiu Qi
Published: August 2024

Single-cell metabolically labeled new RNA tagging sequencing (scNT-Seq) is a droplet microfluidics-based, time-resolved RNA-seq method for joint profiling of newly synthesized (“new”) and pre-existing (“old”) RNAs from the same cell by marking new transcripts with T-to-C substitutions via chemical conversion of 4-thiouridine (4sU) in new RNAs to cytidine analogs (Qiu et al., Nature Methods 17.10 (2020): 991-1001. PMID: 32868927). Here, we described the updated scNT-Seq2 method in which an optimized second-strand synthesis reaction is employed to increase the mapping rate and library complexity. This step-by-step protocol describes metabolic labeling, sample preparation, and scNT-Seq2 library preparation for Illumina sequencing.
Research on Equipment Reliability Modeling and Periodic Maintenance Strategies in Dynamic Environment
Authors: Su Zhongji , Hua Zexi , Hu Die , Zhao Mingjing
Published: August 2024

Equipment along the railway has different degradation paths and reliability in different environments. It is of great significance to study the reliability and maintenance strategy of equipment in dynamic environment to ensure the safety of train operation. In this paper, a method of equipment reliability modeling and periodic maintenance decision-making in dynamic environment is proposed. A reliability model considering the degradation and impact of environmental changes and considering the characteristics of the equipment is established. A new concept of maintenance cycle is defined, and a decision model of equipment periodic maintenance is established. Finally, through numerical simulation, it is concluded that under severe environment, the maintenance time is shortened by 29508h and 31639h respectively, and the maintenance cost is increased by 41.4% and 28.2% respectively. Furthermore, the change trend and adjustment scheme of the strategy under different operating environments are analyzed, which verifies the correctness and effectiveness of the model in this paper.
Temperature Prediction and Performance Comparison of Permanent Magnet Synchronous Motors Using Different Machine Learning Techniques for Early Failure Detection
Authors: ASLAN Emrah
Published: August 2024

Electric motors are increasingly used in various products, including turbines and electric vehicles. Precise temperature measurement is essential for the safe operation of a Permanent Magnet Synchronous Motor. Direct temperature detection of the permanent magnet and stator involves significant costs and hardware requirements. To overcome these challenges, Machine Learning models can eliminate the need for specialized sensors. This study used four diverse regression algorithms: Linear, K-Nearest Neighbor, XGBoost, and AdaBoost. The objective of this study is to model a Permanent Magnet Synchronous Motor used in electric vehicles and predict the temperatures of some of its parameters. The K-Nearest Neighbor Regressor outperformed the other algorithms, achieving a training accuracy of 99.65%, test accuracy of 98.72%, root-mean-square error of 2.16, R2 score of 98.72, and Cross-Validation R2 of 97.77%. These results enable low-cost, real-time temperature monitoring of electrical machinery, enhancing power density, safety, and efficiency.
Analysis of Fault Events in Rail Transit Vehicle Traction Systems Based on Knowledge Graph Reasoning
Authors: Shi Zhao , Zhong Qianwen , Zheng Shubin , Wen Jing , Peng Lele
Published: August 2024

Fault text records provide detailed information on faults and handling steps, which are valuable for fault analysis. However, the different individuals’ recording styles can lead to ambiguities, and it is challenging to uncover potential fault associations in complex systems. To address these issues, this paper proposes a novel method for fault information extraction and analysis. Firstly, to tackle the problem of ambiguous boundaries between entities in fault texts, an integration algorithm is employed to accurately recognize fault entities considering contextual semantic features to establish fault knowledge graph (FKG). Then, a Relational Graph Convolutional Networks (RGCN) is improved with Graph Attention Networks (GAT) for sparse nodes caused by specific types of faults, to dynamically adjust the weight distribution of node learning, inferring potential links within the graph. The proposed method was validated using actual fault records from the traction system of rail transit vehicles, and contributes a reference for the mining and analysis of fault records in complex systems.