bluuebunny/crossref_metadata_2025 huggingface dataset:
ANALISIS KUALITAS AIR LAHAN GAMBUT DI KABUPATEN KAPUAS HULU, KALIMANTAN BARAT UNTUK PENGEMBANGAN BUDIDAYA IKAN HIAS
Authors: Fajriyani Fajriyani , Bayu Bayu
Published: February 2022

Kegiatan ini bertujuan untuk mengukur kualitas air lahan gambut di Kabupaten Kapuas Hulu, Kalimantan Barat, sebagai data dukung dalam penelitian studi bioekologi dan adaptasi ikan hias lahan gambut. Pengukuran dilakukan secara in-situ pada tiga stasiun sampling yaitu Sungai Dusun Batu (E 112.82946°, N 00.59265°), Hutan Trans HTI (E 112.84326°, N 00.62806°), dan Danau Mentaba (E 112.91892°, N 00.69403°). Parameter yang diukur adalah oksigen terlarut, pH, kekeruhan, TDS, konduktivitas, salinitas, amonia, dan nitrit. Alat yang digunakan adalah water quality checker, dan amonia, serta nitrit tester kit. Hasil pengukuran dibandingkan dengan baku mutu perairan sesuai Peraturan Pemerintah No. 82 Tahun 2001 dan Permenkes RI No: 416/MENKES/PER/IX/1990. Berdasarkan hasil analisis diperoleh kadar kualitas air lahan gambut masih dalam kategori layak kecuali nilai pH di Hutan Trans HTI dan Danau Mentaba, serta kandungan oksigen terlarut di Danau Mentaba yang berada di bawah baku mutu perairan. Hasil analisis juga menunjukkan bahwa perairan di Kabupaten Kapuas Hulu cukup baik untuk mendukung kehidupan ikan hias lahan gambut.
Pemberdayaan Masyarakat Melalui Diversifikasi Produk Ikan Puri (Stolephorus sp.)
Authors: Ernawati Ernawati , Hismayasari Intanurfemi B. , Puspitasari Astervina W. , Ismail Ismail , Ulat Muhammad Ali , Poltak Hendra
Published: February 2022

Kegiatan ini bertujuan untuk mendampingi dan memberikan pelatihan kepada masyarakat kelompok nelayan victory jaya tentang diversifikasi ikan puri demi meningkatkan nilai ekonominya. Kegiatan ini diikuti oleh 25 peserta diantaranya 11 nelayan, 3 wiraswasta dan 11 istri nelayan. Pada pembuatan sambal puri menggunakan bahan baku cabe merah, bawang putih, bawang merah, terasi udang dan ikan puri kering. Metode pelaksanaan melalui pelatihan dan pendampingan praktik secara langsung. Berdasarkan hasil pelatihan tersebut, masyarakat memiliki selera tingkat kepedasan pada produk sambal berbeda-beda diantaranya 54% menyukai sangat pedas, 33% menyukai pedas dan  8% tidak menyukai pedas. Namun, hasil pelatihan pengolahan sambal dihasilkan cita rasa yang menggunggah selera sehingga produk yang dihasilkan diharapkan dapat disimpan dalam waktu yang lama serta mudah diterima oleh masyarakat.
MATURITY MEASUREMENT ON BIGEYE SCAD (Selar crumenophthalmus BLOCH 1793) TO INDICATE OVERFISHING
Authors: Hutubessy Grace
Published: February 2022

Bigeye scad (Selar crumenophthalmus) is one of the small pelagic economical species from the family of Carangidae. The annual landing of Carangids in Ambon Island sharply dropped in 2018. Meanwhile, demand for these fish has increased following the local population growth. Was the reduction of fish products showing an indication of overfishing? To answer this, we measured the maturity of bigeye scad caught in Ambon waters during east monsoon (May to July 2019 and March to June 2020), including the length-frequency distribution. We found that the minimum size was 5 cm, the maximum (Lmax) was 23 cm, and the optimum length (Lopt) was 18.7 cm. The estimated length of first maturity (Lm) of bigeye scad was 18.3 cm. This study showed that the optimum length was slightly longer than maturity length. Less than 30% of the catch of bigeye scad was immature and indicated a small probability of recruitment overfishing. Arround 57% of megaspawner found during this study showed more robust broodstocks to produce survival larvae into the population. The possibility of overfishing is relatively low for the bigeye scad fishery during the east monsoon, except for the reduction in the maturity size should be concerned.
Analisis Nilai Tukar Nelayan (NTN) Alat Tangkap Sungkur Udang Rebon (Acetes indicus) Di Kecamatan Toboali
Authors: Kurniawan  , Ferni Anjani Putri  , Muhammad Bachtiyar
Published: February 2022

Penelitian ini bertujuan untuk mengetahui nilai tukar nelayan alat tangkap sungkur udang rebon dan faktor yang memengaruhi nilai tukar nelayan. Penelitian ini dilaksanakan pada bulan Oktober–Desember 2020. Penelitian ini menggunakan metode wawancara dan FGD (Focus Group Discussion). Analisis data menggunakan metode deskriptif. Hasil penelitian menunjukkan bahwa pada bulan Oktober NTN pendapatan nelayan sungkur sebesar 19,23, bulan November sebesar 13,27 dan bulan Desember sebesar 6,41. NTN perikanan pada bulan Oktober sebesar 277,42, bulan November sebesar 194,31 dan bulan Desember sebesar 121,81. Adapun faktor yang memengaruhi nilai tukar nelayan alat tangkap sungkur diantaranya umur nelayan, tingkat pendidikan, lama profesi sebagai nelayan, banyaknya jumlah tanggungan keluarga, harga jual udang rebon dan musim penangkapan. Sehingga NTN nelayan sungkur yang ada di Kecamatan Toboali mengalami penurunan dalam substansi penelitian bulan Oktober–Desember 2020.
Analisis Kelayakan Usaha Perikanan Bagan Tancap di Perairan Karawang
Authors: Perangin-angin Robet , Dian Sutono  , Andre Michael  , Mustasim Mustasim , Dendi Haris  , Mohamad Ardi Partadisastra
Published: February 2022

Penelitian ini bertujuan untuk mengetahui kelayakan usaha perikanan bagan tancap. Jenis penelitian merupakan penelitian deskriptif kuantitatif. Variabel kelayakan usaha yang dianalisis dalam penelitian ini berupa NPV (Net Present Value),  IRR (Internal Rate of Return), dan Benefit Cost Ratio (B/C Ratio). Hasil kajian usaha perikanan bagan tancap yang dilakukan pada perairan pesisir kabupaten Karawang, diperoleh nilai R/C ratio sebesar 1,31; Payback Period (PP) sebesar 1,37; nilai Return on Investment (ROI) sebesar 0,24; nilai NPV sebesar Rp. 153.466.594; Net B/C ratio 2,47; dan Internal Rate of Return (IRR) sebesar 76,47%. Indikator-indikator analisis finansial tersebut, memberikan konfirmasi bahwa perikanan bagan tancap ini layak untuk diusahakan dan dikembangkan.
ANALISIS DETERMINAN BIAYA TRANSAKSI (Studi Kasus Tambak Bandeng Kecamatan Juwana Kabupaten Pati)
Authors: Setyanto Alief Rakhman , Iskandar Deden Dinar
Published: February 2022

Kabupaten Pati diketahui sebagai salah satu daerah penghasil ikan budi daya (khusus produksi Bandeng) terbesar di Propinsi Jawa Tengah Kabupaten yang secara geografis terletak di sepanjang pantai utara ini mempunyai kemampuan pengembangan usaha perikanan yang sangat besar, baik perikanan budi daya atau perikanan tangkap. Perikanan di kabupaten Pati cukup potensial untuk dikembangkan dan diharapkan menjadi salah satu sektor andalan dalam pengembangan kemampuan daerah di masa yang akan datang. Penelitian ini dilakukan di Kecamatan Juwana dan bertujuan untuk mengidentifikasi biaya transaksi yang muncul pada petani tambak di Kecamatan Juwana serta menganalisis determinan biaya transaksi yang muncul pada petani tambak Kecamatan Juwana. Penelitian ini menggunakan data cross section dengan sampel 98 petani tambak bandeng. Pendekatan analisis menggunakan statistik deskriptif dan analisis regresi berganda OLS (ordinary least square). Hasil penelitian menunjukkan biaya transaksi yang paling banyak muncul di kalangan petani tambak adalah biaya transportasi, sedangkan determinan biaya transaksi yang terdiri dari ketidakpastian, dan frekuensi yang berpengaruh negatif terhadap biaya transaksi. Jaringan sosial dan jaringan pertemanan berpengaruh positif terhadap biaya transaksi, trust berpengaruh negatif terhadap biaya transaksi, kelembagaan berpengaruh negatif terhadap biaya transaksi dan penyuluhan berpengaruh positif terhadap biaya transaksi. Tittle: Analysis of Transaction Cost Determinants (Study of Tambak Bandeng in Juwana District Pati Regency)Pati Regency is well-known as one of the largest aquaculture area (especially milkfish production) in Central Java Province. The district is geographically located along the north coast. It is potentially developed with a considerable fishery business both in aquaculture and capture fisheries. Its fisheries resource becomes a prospect sector for the future growth of the area. The research was conducted in Juwana Sub-district. It aims to identify transaction costs among the pond farmers in Juwana Sub-district and analyze the determinants of the transaction costs. The study used cross sectional data from 98 milkfish farmers. The analysis approach used descriptive statistics and OLS multiple regression analysis (ordinary least square). Results of the study showed that transaction costs that most frequently occur among pond farmers are transportation costs, while the determinants of transaction costs which consist of uncertainty and frequency negatively affect transaction costs. Friendship and social networks have positive effect on transaction costs, trust has negative effect on transaction costs, institution has negative effect on transaction costs and counseling has positive effect on transaction costs.
Optimizing the Role of Social Media for Fisheries Business Development (Case Study in the Middle of Covid 19 Pandemic in West Java)
Authors: Nurhayati Atikah , Riyantini Indah , Nurruhwati Isni , Aisah Isah
Published: February 2022

The spread of the Covid 19 outbreak felt its impact in the fisheries sector. The spread of Corona Virus has brought new challenges and risks in social life, including fisheries businesses. Fishery business practitioners, namely fishermen, fish cultivators, fishery product processors and fishery product marketers, experience logistical and marketing problems. Some indications of the impact of the Covid-19 pandemic are evident in the fisheries business. These indications are a decrease in the price of fishery products, a logistic system that cannot run normally, and a decrease in demand for fishery products, all of which impact on the household income of the fishery business. The disruption of distribution channels between businesses and consumers due to restrictions on human mobility that is applied to overcome the Covid 19 outbreak is the root cause. Regional quarantine as well as large-scale social restrictions do not prohibit mobility in the transportation of goods, but in reality these restrictions significantly impede the traffic of fishery products. This is reminiscent of the implementation of the 4.0 revolution in the fisheries and marine sector, where fisheries and marine businesses including fish farmers to innovate in the use of automation tools that are controlled from smartphone applications. With digital applications, cultivation can use it to anticipate during current conditions, when the Covid 19 pandemic occurs, where market access is directly restricted which can be circumvented by online marketing where producers and consumers do not make transactions directly. This reserach  aims to analyze the optimization of the role of social media for the development of fisheries business case studies in the middle of the Covid 19 pandemic in West Java. Research time is from February to May 2020. The research method used was a survey method. The data used are primary and secondary data. Primary data were obtained by taking the technique of non-probability sampling respondents to 40 respondents of fisheries businesses. The analytical tool used in this reserach  is non-parametric statistics with Friedman and Kendalls using twigs to scale. Based on the results of research, the level of knowledge of fisheries business operators regarding handling of Covid 19 averages 70% of knowing, understanding and implementing health protocols in carrying out daily activities, the role of social media is high for fisheries business actors consisting of fishermen, fish cultivators, fishery product processors and marketer of fishery products. Social media used include Instagram, Short Message Service (SMS), Websites, Blogs, Facebook and Whatsapps. The most optimal use of social media activities is carried out by fishery product marketers via Whatsapps. and Instagram.
PEMETAAN DAYA SAING PRODUK PERIKANAN PULAU JAWA DI PASAR TUJUAN UTAMA
Authors: Achsa Andhatu , Destiningsih Rian , Septiani Yustirania , Verawati Dian Marlina
Published: February 2022

Penelitian ini dilatarbelakangi adanya penurunan nilai ekspor perikanan yang terjadi di tahun 2003 hingga 2016, walaupun setelah itu mengalami peningkatan kembali. Hal tersebut diduga terjadi karena kuantitas ekspor perikanan mengalami penurunan sebesar -0,15 persen. Adapun usaha awal mencegah penurunan ekspor perikanan semakin berkepanjangan yaitu dengan mengidentifikasi wilayah produksi perikanan yang memiliki keunggulan komparatif dan kompetitif. Dalam hal ini, sentra perikanan dibagi menjadi dua kelompok yaitu perikanan tangkap dan perikanan budi daya. Metode yang digunakan antara lain Shiftshare Esteban Marquilas (SS-EM), Revealed Comparative Advantage (RCA) dan metode Ekspor Produk Dinamika (EPD). Hasil penelitian menunjukkan daya saing perikanan hanya ada pada provinsi DIY; sedangkan provinsi lainnya hanya memiliki spesialisasi. Selanjutnya, daya saing perikanan Indonesia pada ketujuh pasar tujuan utama ekspor perikanan yaitu Tiongkok, Jepang, Hongkong, Amerika Serikat, Malaysia, Uni Eropa dan ASEAN memiliki daya saing kuat. Selanjutnya, produk perikanan Indonesia selama tahun 2000-2018 tergolong rising star pada pasar Malaysia, Tiongkok dan Amerika Serikat.Title: Mapping The Competitiveness of Java Island Fishery Products In Main Destination MarketThe decrease of fisheries export values from 2003 to 2016 initiated this research. Despite its increasing afterwards, the decreasing is presumed due to the decrease of export quantities by -0.15 percent. Initial effort to prevent on decreasing of export quantities is identifying fisheries production centers with comparative and competitive advantages. Fisheries production centers are divided into two groups: capture fisheries and aquaculture. Shiftshare Esteban Marquilas (SS-EM), Revealed Comparative Advantage (RCA) and Export Product Dynamics (EPD) methods are employed in this research. The results indicate that fisheries competitiveness is only seen in Yogyakarta, while other provinces only have specialization in fisheries. It is notified that competitiveness of Indonesian fisheries products is considered strong in seven market destination: China, Japan, Hongkong, United States, Malaysia, European Union, and ASEAN countries. Furthermore, Indonesian fisheries products in 2000 - 2018 has been acknowledged as rising star in several market destination: Malaysia, China and United States.
Pemodelan Pasang Surut dengan Menggunakan Metode Flexible Mesh untuk Mengetahui Genangan Rob di Pesisir Karawang
Authors: Sagala Herlina Adelina , Pasaribu Roberto Patar , Ulya Fafthia Karimatul
Published: February 2022

ABSTRAKPasang surut air laut merupakan salah satu gejala alam yang tampak di laut, yakni gerakan naik turunnya muka air laut. Gerakan tersebut disebabkan oleh pengaruh gaya tarik menarik antara bumi, bulan dan matahari. Data pasang surut dapat memberikan gambaran hidrodinamika di daerah pesisir dan dapat digunakan untuk perencanaan pembangunan dan mitigasi bencana di wilayah pesisir. Untuk mengetahui pasang surut dapat dilakukan dengan pengukuran langsung di lapangan atau dapat dilakukan dengan pemodelan. Penelitian ini bertujuan untuk membuat pemodelan pasang surut pantai Karawang dan dimanfaatkan untuk mengetahui genangan rob yang sering terjadi di pesisir Karawang. Metode yang digunakan dalam pemodelan pasang surut ini adalah Metode Flexible Mesh Simulasi yang terdapat pada Software Mike 2 dengan mengunakan data batimetri, garis pantai dan topografi. Hasil pemodelan pasang surut di perairan Karawang diketahui tipe pasang surut adalah tipe campuran condong harian tunggal dengan nilai Fomzhal adalah 2.854. Pasang tertinggi terjadi pada 8 Maret 2021 dengan interval waktu selama 2 jam dan elevasi berkisar 0.20-0.42m. Prediksi genangan banjir rob tertingi terjadi pada pada 13 Maret 2021 dengan interval waktu selama 3 jam dan nilai elevasi berkisar 0.11-0.15 m berada pada pesisir Kecamatan Pedes dengan dengan luasan genangan 38,69 km2.ABSTRACTThe tides are one of the natural phenomena that appear in the sea, namely the movement of rising and falling sea levels. The movement is caused by the influence of the attractive forces between the earth, moon and sun. Tidal data can provide an overview of hydrodynamics in coastal areas and can be used for development planning and disaster mitigation in coastal areas. To find out the tides can be done by direct measurements in the field or can be done by modeling. This study aims to model the tides of the Karawang coast and is used to determine the tidal inundation that often occurs on the coast of Karawang. The method used in this tidal modeling is the Flexible Mesh Simulation Method found in Mike 2 Software using bathymetry, coastline and topography data. From the results of tidal modeling in the Karawang Waters, it is known that the tidal type is a mixed type with a single daily slope and the Fomzhal value is 2.85. The highest tide will occur on March 8, 2021 with an interval of 2 hours and an elevation of 0.20-0.42m. Prediction of the highest tidal flood inundation will occur on March 13, 2021 with an interval of 3 hours and an elevation value ranging from 0.11-0.15 m on the coast of Pedes District with an inundation area of 38.69 km2.
Modeling of Plastic Debris Particle Trajectory During Pre and Post Reclamation in Jakarta Bay
Authors: Winardi Edwin Apriyanta , Putri Mutiara Rachmat , Cordova Muhammad Reza , Setiawan Agus
Published: February 2022

The primary source of environmental problems in Jakarta Bay’s waters is the change in hydrodynamics caused by reclamation and land-derived waste from the 13 watersheds that discharge into the bay. In June and December 2006 and 2015, hydrodynamic and trajectory simulations were conducted in Jakarta Bay to determine the distribution of plastic debris in pre- and post-reclamation conditions. The hydrodynamic conditions and particle trajectory in Jakarta Bay were described numerically using the Hamburg Shelf Ocean Model (HAMSOM). Secondary tidal data and primary ADCP data are used to validate the simulation results. The distribution of plastic debris released during the simulation depicts a distribution that follows the monsoon pattern, moving west during the east monsoon and moving east in the west monsoon and spreading along the coastline in both conditions. The percentage of plastic debris increased by 21.42% in June and 4.07% in December. The increase in the percentage of plastic debris that remains in the waters of Jakarta Bay is due to a 0.03 - 0.05 m/s decrease in current velocity following the formation of the reclamation island. Due to the decrease in current velocity within the bay, trajectory simulations indicate that plastic debris will take an additional 69.52 – 304.25 hours to exit. The accumulation of plastic debris around the reclamation islands demonstrates that the islands act as waste traps, necessitating proper waste cleanup, particularly in the canal area and around the reclamation island.
Semi-Automatic Classification Model on Benthic Habitat Using Spot-7 Imagery in Penerusan Bay, Bali
Authors: Br Ginting Devica Natalia , Purwanto Anang Dwi
Published: February 2022

Benthic habitats are one of the interesting marine resources and its existence must be preserved. Provision of up-to-date benthic habitat information requires a relatively large amount of time and money. The use of remote sensing technology is one of the best solution. This study aims to develop a semi-automatic processing model that is fast, accurate, and with broad spatial coverage. The satellite image data used is the SPOT-7 image acquired on April 11th, 2018. The method used is a supervised classification with a decision tree algorithm. The analysis was carried out using a script developed in the open-source R application. The results showed that the model used was able to accelerate the processing of benthic habitat extracted from the initial process to the classification. The model developed is able to classify habitat classes based on the training sample data provided so that it does not affect the user’s ability to determine the habitat class. The resulting model accuracy is 93.6%. The validation of the resulting classification showed an overall accuracy of 59% and a kappa accuracy of 0.46. It is necessary to carry out further research by increasing quality and quantity of training samples from each object of benthic habitats and developing scripts in order to produce better mapping accuracy.
Esencia y fundamento del Derecho en el pensamiento de Javier Hervada
Authors: Serna Pedro
Published: February 2022

Este estudio describe y analiza críticamente el proceso de formación del pensamiento de J. Hervada sobre la esencia y el fundamento del Derecho. La obra de Hervada constituye, desde sus inicios como canonista, un intento de determinar la naturaleza de lo jurídico y, en relación con ella, de abordar la cuestión del fundamento radical del Derecho, que él sitúa en la persona humana y en su dignidad. Esta perspectiva le permite abordar satisfactoriamente algunas cuestiones fundamentales de la Teoría y la Filosofía del Derecho que siguen siendo controvertidas a día de hoy: la relación entre la justicia y el Derecho o, más en general, entre el Derecho y la moral, la cuestión del Derecho natural y su inserción en el orden jurídico, la crítica del positivismo jurídico, etcétera.
La continuidad de los fundamentos del realismo jurídico clásico en la obra de Javier Hervada
Authors: Albert-Márquez José-J.
Published: February 2022

Es objeto de este artículo destacar cómo los fundamentos radicales del derecho y del derecho natural se encuentran ya asentados en algunos de los primeros trabajos de Javier Hervada, de modo que es perceptible una continuidad pacífica en su obra con relación a estos fundamentos. Para ello se ha recurrido, en su mayor parte, a escritos de los años sesenta del pasado siglo, cuyos principios son desarrollados en obras posteriores. Las bases metafísicas y teológicas del pensamiento hervadiano determinan así una concreta antropología en la que el derecho, en su concepción unitaria e integral, cumple una función capital.
The Juridical Domain of the Intrinsic Common Good of the Political Community: Hervadian Perspectives
Authors: Popović Petar
Published: February 2022

This paper explores the contribution of Javier Hervada to the correct understanding of the juridical domain of the intrinsic common good of the political community. After some introductory remarks on the current status of the intrinsic political common good, in the first part of the article the concept of the intrinsic aspect of the political common good is presented from the viewpoint of the Thomistic social ontology and Catholic social doctrine. In the second part of the article, some crucial Hervadian perspectives are elaborated for the conception of the juridicity of the intrinsic bonum commune of the polity.
Naturaleza humana y finalidad como claves de interpretación en la obra de Javier Hervada
Authors: Madrid Raúl
Published: February 2022

El objetivo de esta contribución es analizar algunas dimensiones del principio general hervadiano de que la naturaleza como esencia es a la vez el principio de acción del ser humano y su propia finalidad. Para ello, la primera parte está destinada a espigar los sentidos principales del concepto de naturaleza en el mundo clásico, y cómo se une a la idea de finalidad en Aristóteles, y luego en el pensamiento medieval representado por la figura de Santo Tomás de Aquino. La segunda parte, desde la afirmación de que la naturaleza es medida de orden y proporción, desarrolla brevemente cuatro aspectos del problema en el contexto de la obra del gran jurista de la Universidad de Navarra. Estos aspectos son: (a) naturaleza empírica y naturaleza como ratio; (b) la naturaleza como medida de orden y de conducta; (c) la naturaleza y el orden universal (inmanencia y trascendencia, y (d) La finalidad en el mundo por venir (una nueva civilización).
Il principio istituzionale e gerarchico nel sistema costituzionale di Javier Hervada
Authors: Del-Pozzo Massimo
Published: February 2022

L’espressa formalizzazione della scienza costituzionale induce Hervada a ricercare i principi basilari dell’ordinamento canonico nei principi di uguaglianza radicale, di varietà e gerarchico. Il profilo gerarchico, rispettando la condizione del fedele e i diritti fondamentali, è alla base dell’assetto istituzionale. L’analisi esplora la possibile differenziazione tra il principio istituzionale (la volontà fondativa di costituire un ente transpersonale e permanente) e il principio gerarchico (la riserva di alcune funzioni pubbliche e la graduazione interna all’ordo). L’istituzionalità aiuta a comprendere la consistenza e lo sviluppo dell’organizzazione ecclesiastica. La differenza funzionale e il coordinamento organico precisano il significato e l’estensione della gerarchia. L’insegnamento di Hervada in questi ambiti è ancora molto attuale e stimolante in riferimento alla ministerialità del governo, alla coesione e unitarietà interna all’ordo e al collegamento diretto tra azione gerarchica e beni della comunione.
PROTOTYPING OF CENTRIFUGAL MICROCOMPRESSORS USING ADDITIVE TECHNOLOGIES
Authors:   Ural Federal University named after the first President of Russia B.N. Yeltsin, Sedunin Vyacheslav , Marchenko Yuri ,   Ural Federal University named after the first President of Russia B.N. Yeltsin, Kalinin Ilya ,   Ural Federal University named after the first President of Russia B.N. Yeltsin
Published: February 2022

In the fast-developing market of customer products, a development lead time becomes more and more critical. However, these technologies have limits. Also, the application of so-called additive manufacturing technologies, particularly FDM 3D printing, is limited by the materials used and the part’s quality. The significant advantage of additive manufacturing is building components without the use of molds or tools. The paper presents an experience of fast prototyping a centrifugal compressor using 3D printing with polymer plastics. 3D printing of parts has the main goal in this study to develop a structural and functional prototype for variation centrifugal compressors testing. Additive manufacturing technologies can fabricate centrifugal compressors with less labor and any configuration. Attention is paid to the choice of 3D printing technology, materials, and the influence of printing parameters on the product's mechanical properties. In conclusion, experimental results are presented for the prototype together with recommendations for serial manufacturing. Also, a laboratory bench is described where variant tests will be carried out. All this will allow the reader to interpret those solutions more reasonably and take into account the specifics in more detail when developing a technical requirement for centrifugal compressors testing.
SELECTION AND OPTIMIZATION OF THE MAIN PARAMETERS OF TURBOCOMPRESSORS IN THE DESIGN AND FINE-TUNING OF GAS TURBINE ENGINES
Authors:   Ufa State Aviation Technical University, Simonov Nikolay , Krivosheev Igor ,   Ufa State Aviation Technical University, Rozhkov Kirill ,   Ufa State Aviation Technical University
Published: February 2022

The choice and optimization of the rotational speed, the number of stages, the axial velocities distribution, reactivity, diametric dimensions and flow path shape, the blade rows width, changes in the height of the flow path in the compressors and turbines of the gas turbine engine are considered. The method for determining the total pressure recovery ratio and its relationship with the efficiency of blade rows, stages, compressors and turbines is proposed. It is shown that with the same value of this indicator in these elements, the maximum efficiency of compressors and turbines in the composition of turbocompressors is achieved. It is proposed to use this indicator at an early design stage to determine the optimal stages number and the work distribution between them, the change in work along the flow path height. It is shown how the position of the points for the stages and the optimal flow path shape are determined on the Smith diagrams. Various methods are proposed for parameters choosing of the blade profiles for the first, last and for intermediate steps. It is shown how these methods are used when fine-tuning compressors and turbines based on the results of GTE tests. The results of approbation of the developed design and refinement methods are given on examples of changing the geometry of the blade rows and the flow path in the replaceable flow path of the centrifugal blower for the R-16 "Ufa" gas compressor unit, the refinement of the 3-stage LPC for perspective two spool turbofan engine, comparison with the results of simulation in the DVIGw system , 2D and 3D CAD / CAE-modeling.
The school organisational climates of well-performing historically disadvantaged secondary schools
Authors: Xaba Mgadla Isaac , Mofokeng Salome Kelly
Published: February 2022

In the study reported on here we investigated the nature of the organisational climates of well-performing, historically disadvantaged secondary schools. These schools were designated for Black learners during the apartheid era in townships and rural areas. Despite their “disadvantagedness”, many of these schools have consistently performed well in the National Senior Certificate (NSC)ii for 3 consecutive years or more. The Organisational Climate Descriptive Questionnaire-Rutgers Elementary (OCDQ-RE) was administered to 1,050 teachers from these schools in the Gauteng Department’s Sedibeng and Johannesburg South districts. Results reveal that although these schools are regarded as well-performing, their teachers perceived their organisational climates as closed with principal and teacher behaviours being closed. Teachers experienced very low engagement and above-average frustrated behaviour. An important consideration is that principals seemed to exhibit directive support, which seems to have led to teachers exhibiting features of engaged behaviour. The implication is for principals’ capacity-building, which should include features of holistic school organisational behaviour and development. Furthermore, the Organizational Climate Descriptive Questionnaire for Secondary Schools (OCDQ-RS) should be validated for the South African school context.
Compressive strength of heterogeneous masonry walls containing blends of brick types
Authors: Benedetti Andrea , Tarozzi Mirco
Published: February 2022

The study presents a systematic approach for the evaluation of the compression strength of masonry walls composed of heterogeneous mixes of different types of blocks. First of all, the mechanics of a compressed heterogeneous masonry stack is investigated through a series of experimental tests and Finite Element models, then it is reviewed and discussed. Then, the problem of deriving the necessary material parameters entering the Hilsdorf formula is addressed. Solutions for the correct evaluation of the lacking data are presented based on the existing literature data. Finally, the well-known Hilsdorf formula is extended to the field of block blends with different mechanical properties. A deep experimental investigation on stacks and wallets made with fired clay, limestone and sandstone blocks is introduced for the first time. The comparison of the experimental data with the proposed theory points out the very good predictive capability of the extended Hilsdorf formula derived herein.
Briefing: More from less – greater materials efficiency using high-strength steels
Authors: Baddoo Nancy
Published: February 2022

The use of high-strength steels (HSS) enables members to have smaller cross-sections or to be lighter, or both. The extent of the weight savings depends on the type of member and the mode of loading. Lighter sections lead to reductions in carbon dioxide emissions and, usually, lower material costs. The reduction in weight can also lead to cost savings in the foundations, welding, fabrication, transportation and erection. As a result of these benefits, steels of higher strength are being increasingly used in a range of construction applications, but particularly for heavy columns, transfer beams, trusses and bridge girders. Certain aspects of the design and fabrication of HSS require special attention in order to exploit fully the benefits of the high strength. In 2018, the Institution of Civil Engineers (ICE) awarded a grant from the ICE Research and Development Enabling Fund to the Steel Construction Institute (SCI) to write a guide covering both the design and execution of HSS of yield strength 420–700 MPa, giving ‘holistic’ guidance covering strength, stability, serviceability and fabrication. The SCI High Strength Steel Design and Execution Guide was written in collaboration with experts in the steel construction supply chain and published in 2020.
Post-fire performance of slag-based geopolymer concrete exterior beam–column joint
Authors: Roy Biswajit , Choudhury Arshad Hussain , Laskar Aminul Islam
Published: February 2022

The post-fire performance of slag-based geopolymer materials in structures under cyclic loading has yet to be reported and the condition of the rebars inside such structures remains unexplored. In the present work, cyclic tests were conducted on exterior beam–column joints made with a slag-based geopolymer after exposing the specimens to natural fire. The mechanical properties of the reinforcement embedded in fire-exposed specimens were also determined and analysed. The cyclic test results indicated that deterioration of the geopolymer and rebar altered the failure pattern of the fire-exposed specimen from the desired beam-end hinging to joint shear failure. The peak load, stiffness, ductility and energy dissipation reduced significantly in the fire-exposed specimens compared with the unheated control specimens.
Emociones, espacio público e imágenes urbanas en el contexto de COVID-19
Authors: Cabrera-Barona Pablo , Barragán-Ochoa Fernando , Carrión Andrea , Valdez Felipe , López-Sandoval María Fernanda
Published: February 2022

El confinamiento y las restricciones de movilidad durante la pandemia de COVID-19 han dado lugar auna serie de dilemas sobre el uso y percepción del espacio público, donde sus propiedades relacionalesy contextuales pueden dar lugar a una diversidad de emociones. Con la aplicación de herramientas machinelearning y social network analysis, exploramos emociones sobre el espacio público basadas enatributos de imágenes fotográficas en la ciudad de Quito, Ecuador, tomadas entre abril y junio de 2020.Los resultados muestran emociones positivas y negativas asociadas a un mismo atributo del paisajeurbano, mientras que atributos que pueden considerarse opuestos (como “brillante” y “sucio”) podríantener mayor influencia en los sentimientos positivos sobre dicho espacio. Esta investigación abre unnuevo campo de estudio en la región sobre las emociones urbanas, y ofrece un mejor entendimiento delas percepciones de los ciudadanos sobre el espacio público durante la crisis de la pandemia.
La utilización política del terrorismo en la campaña presidencial peruana de 2021
Authors: Mendoza Marina
Published: February 2022

Las elecciones presidenciales de 2021 constituyeron un punto de inflexión en la historia reciente de Perú. En un contexto de crisis sociosanitaria e impugnaciones al sistema político, las Elecciones del Bicentenario evidenciaron la profunda fragmentación social y la polarización entre los representantes del proyecto neoliberal y aquellos que promueven una alternativa reformista. En particular, la campaña presidencial para la segunda vuelta entre la candidata de derecha Keiko Fujimori y el candidato de izquierda Pedro Castillo configuró un escenario propicio para la instrumentalización del “teruqueo”. Esta estrategia, empleada por las élites dominantes en el período posconflicto para desprestigiar a cualquier persona, acto o colectivo que constituya una amenaza al orden establecido, se reconfiguró en esta coyuntura para evitar un potencial triunfo del candidato serrano, construyéndolo como una amenaza terrorista que pondría en riesgo la democracia. A través del Análisis Crítico del Discurso, se analiza cuáles fueron los recursos discursivos utilizados por las élites dominantes para deslegitimar al adversario de izquierda, utilizando para ello los mensajes emitidos en los debates presidenciales, el plan de gobierno de Keiko Fujimori y la “campaña anticomunista” que sostuvieron los principales sectores de derecha en los principales medios de comunicación nacionales e internacionales. Como principales conclusiones, se observa que las tres estrategias más utilizadas fueron: 1. la negativización del candidato de izquierda mediante su construcción como un enemigo terrorista; 2. la presentación de la candidata de derecha como la protectora de la democracia y la libertad frente a la amenaza comunista; 3. y la apelación a la memoria social sobre el conflicto armado interno que avivó el miedo al retorno del terrorismo. Sostenemos que estas estrategias lograron encuadrar el tratamiento mediático de la campaña presidencial como un enfrentamiento entre “nosotros” los defensores de la democracia y “ellos” los impulsores de la dictadura comunista debido a la persistencia de elementos sociohistóricos que emergen sistemáticamente en Perú en contextos de crisis sociopolítica.
[RETRACTED] Unabis CBD Gummies v1
Authors: not provided andrejatabor
Published: February 2022

[RETRACTED]

This CBD product may not include fillers, synthetics, artificial preservatives, flavors, colors, or gluten. It may not cause any side effects in the body such as headaches, migraines, or intoxication.
Dynamics of the Dirac Particle in an Anisotropic Rainbow Universe
Authors: KANGAL Evrim Ersin
Published: February 2022

An alternative way of understanding physical effects in curved space time is to solve the associated particle equation such as the Dirac equation. It is a first-order relativistic wave equation and defines spin-1/2 massive particles like electrons and quarks. In this study, we solved the Dirac equation in an anisotropic rainbow universe. Subsequently, the reduced wave equation is obtained by making use of the asymptotic property of the Whittaker function. In the final stage, we calculate each component of the spin current density and then graphically evaluate their behavior according to the rainbow function. According to our results, the spin current density only depends on the z component of the momentum. In addition, the sign of both spin current densities is not changing with time. Finally, the current density amplitude in the high energy state or high scale parameter(ϵ=0.9) is rapidly decreasing faster than in ϵ=0.6 and ϵ=0.3.
Automated Detection of Clipping in Broadband Earthquake Records
Authors: Kleckner James K. , Withers Kyle B. , Thompson Eric M. , Rekoske John M. , Wolin Emily , Moschetti Morgan P.
Published: February 2022

Because the amount of available ground-motion data has increased over the last decades, the need for automated processing algorithms has also increased. One difficulty with automated processing is to screen clipped records. Clipping occurs when the ground-motion amplitude exceeds the dynamic range of the linear response of the instrument. Clipped records in which the amplitude exceeds the dynamic range are relatively easy to identify visually yet challenging for automated algorithms. In this article, we seek to identify a reliable and fully automated clipping detection algorithm tailored to near-real-time earthquake response needs. We consider multiple alternative algorithms, including (1) an algorithm based on the percentage difference in adjacent data points, (2) the standard deviation of the data within a moving window, (3) the shape of the histogram of the recorded amplitudes, (4) the second derivative of the data, and (5) the amplitude of the data. To quantitatively compare these algorithms, we construct development and holdout datasets from earthquakes across a range of geographic regions, tectonic environments, and instrument types. We manually classify each record for the presence of clipping and use the classified records. We then develop an artificial neural network model that combines all the individual algorithms. Testing on the holdout dataset, the standard deviation and histogram approaches are the most accurate individual algorithms, with an overall accuracy of about 93%. The combined artificial neural network method yields an overall accuracy of 95%, and the choice of classification threshold can balance precision and recall.
Evaluation of rationality of fixed dose combinations of antimicrobials available in Indian market
Authors: Srivastava Rohan , Kantharia N. D.
Published: February 2022

Background: The antimicrobial resistance is alarming at present. One of the important factors for resistance is use of irrational fixed dose combinations. Thus, objective was to critically analyze the rationality of FDCs of antimicrobial agents currently available in India.Methods: The FDCs of AMAs enlisted in Indian Drug Review 2019 were analyzed by 8 point criteria tool. Analysis includes number of active pharmacological ingredients, approval by central drug standard control organization, listing in world health organization model list of essential medicines (2019) or Government of India national list of essential medicines (2015). Literature search was used for assessing efficacy, safety, pharmacokinetic and pharmacodynamic interactions and advantages of each FDC. Each criterion was assigned score one, if positive and minus one, if negative leading to total score of 12. FDC with score of ≥7 was considered as rational.                                                                         Results: The FDCs of AMA available in Indian market were 116 while FDCs included in WHO model list, 2019 were 24. Majority of FDCs available were irrational that include combination of antibacterial with bromhexine, carbocisteine, ambroxol, serratiopeptidase, antiamoebic and antifungal etc. Most of the rational FDCs belong to antiretroviral, antitubercular and antimalarial drugs.                                Conclusions: Most of the FDCs of AMAs available in Indian market are irrational. These needs educating the prescribers including resident doctors. There is need to critically review such FDCs by drug regulators with strict action regarding manufacturing and marketing.
Prevalence of pulmonary arterial hypertension in severe chronic obstructive pulmonary disease patients attending tertiary care centre Ernakulam
Authors: George Jilse , V. Niranjan A. , Nair Tara B. , . Minhaj
Published: February 2022

Background: Chronic obstructive pulmonary disease (COPD) is an irreversible bronchial inflammation of lung airways and parenchyma. Various factors play an important role in occurrence and severity of pulmonary arterial hypertension (PAH), a common in severe COPD. The objective of the study is to know the proportion of PAH in patients with severe COPD and to find the association between various factors.Methods: 180 cases of severe COPD patients admitted in Government Medical College Ernakulum from January 2019-December 2019, were enrolled into this cross-sectional descriptive study. Subject’s history, clinical examination, anthropometric measurements, vitals, Arterial Blood Gas (ABG) analysis were done.Results: Among 180 subjects, 148 (82.22%) had mild PAH, 22 (12.22%) subjects had moderate PAH and 10 (5.56%) had severe PAH. Use of accessory muscle was the most elicited sign in the study with 174 (96.67%). 170 (94.44%) had cough and 169 (93.89%) had breathlessness which were the most reported symptoms. Demographic variables and clinical features had no significant mean pulmonary artery pressure (mPAP) association. Grade 3 PAH groups were elder than others, which was statistically significant (p<0.047). FEV1, Oxygen Saturation and ejection fraction were lowest in grade 3 PAH subjects. Respiratory rate, hemoglobin, PCV, tricuspid velocity, PaCO2 were highest in grade 3 PAH subjects being statistically significant (p<0.0001).Conclusions: In our study, majority of severe COPD patients had mild PAH.  There was an independent correlation between respiratory rate, hemoglobin, PCV, tricuspid regurgitant velocity and PaCO2 with severity of PAH.
Prevalence of urinary tract infection and sensitivity pattern in febrile children less than 5 years of age
Authors: Gupta Manoj Kumar , Yadav Dhirendra Prasad , Ansari M. Ashfaque
Published: February 2022

Background: Fever has long been considered as an important clinical finding in children with urinary tract infections (UTIs), it is often ignored in children in whom the symptoms are fuzzy. UTI in children is alarming because of the acute and chronic complications not seen routinely in adults. The study emphasizes that UTI should be strongly suspected in febrile children to prevent future complications. This study was undertaken to determine the prevalence of UTI and sensitivity pattern in febrile children and to assess the validity of microscopic urine analysis against urine culture in the diagnosis of UTI.Methods: A descriptive study was undertaken in the department of pediatrics, NMCTH, Birgunj. Data related to age, sex, nutritional status, socioeconomic status were noted. Physical examinations with relevant investigations were carried out in all those patients.Results: Out of 1074 children 147 showed significant pyuria (13.7%) and 44 showed significant bacterial growth making an overall prevalence of 4.1%. Urine cultures were done in all the cases and showed positive culture in 29.93%. Among culture positive cases gram negative organisms were commonly isolated. E. coli (70.45%) commonly isolated in the culture was found highly sensitive to cefotaxime and sulphamethoxazole /trimethoprim (32.14%) and was highly resistance to cefepime, cefuroxime, cefixime.Conclusions: Overall prevalence of UTI in our study was low (4.1%). The >5 pus cells/hpf in centrifuged sample should be considered as significant pyuria and further evaluation should be done promptly to initiate treatment and to prevent long term sequalae.
Effect of maternal weight gain during pregnancy and gestational hypertension on birth weight of the baby
Authors: P. Chandrakala , Kumar N. Mohan , Patil Vinutha , Nisha Rahamuth
Published: February 2022

Background: Birth weight is not only an indicator of child growth and development but also valuable indicator of maternal health, nutrition and quality of life. Many maternal factors have been postulated to determine the birth weight of the baby like maternal age, weight, height, education, parity, antenatal care, maternal habits like smoking, sex of the baby and maternal comorbidities like hypertension.Methods: This study was conducted in Kempegowda institute of medical sciences Bangalore during the period of December 2019 to June 2021.All babies born with weight <2.5 kg weight were included in the study irrespective of gestational age. Mothers were divided into 3 categories based on weight gained during pregnancy into less than 10 kg, 10 to 15 kg and more than 15 kg weight gain. Low birth weight babies included in the study were categorized based on weight gain of the mother and presence of various maternal comorbidities like hypertension, diabetes, anemia, hypothyroidism.Results: Analysis showed that among 150 low birth weight babies 110 babies were born to mothers with weight gain less than 10 kg (73.3%), 37 (24.7%) babies were born to mothers with weight gain 10-15 kg and 3 (2%) babies were born to mothers with weight gain more than 15 kg. We also found that among all mothers of low-birth-weight babies 33.7% mothers did not have any comorbidities and gestational hypertension was found in 20.7% of mothers showing it as important risk factor for low-birth-weight babies.Conclusions: Our study shows adequate maternal weight gain during pregnancy independently influences birth weight of the baby. Thus, mother’s nutritional care should be appropriate to maintain adequate weight gain. Among all maternal comorbidities gestational hypertension is a major risk factor for low-birth-weight babies.