Maskawin dalam Sistem Perkawinan Tukar Suku Isirawa di Kampung Wari, Sarmi, Papua

This paper aims to explore and document the concept and meaning of dowry in the Isirawa people bride exchange system, determines its impact on women and children, and provides a reflective analysis from a feminist point of view regarding the dowry payment system. The research used the feminist ethnography qualitative method through literature studies, interviews, and observations. The results found that the dowry exchange system, when viewed from a positive side, means that women or children are considered very valuable and vital for the Isirawa community, namely to strengthen kinship between families and clumps, to continue the clan, as a tool of peace in a conflict as prevention of domestic violence. However, on the other hand, it has a negative impact that is more detrimental to women, namely limiting women's rights, violence, and unfair treatment of women and children. So, it needs to be criticized and consider changing some parts of the tradition that marginalize them by providing solutions, understandings, and new Christian values not to eliminate the existing culture but continue to enable carrying out the tradition for the welfare of the people without harming the other.AbstrakTulisan ini bertujuan untuk mengeksplorasi dan mendokumentasikan konsep dan makna maskawin dalam sistem perkawinan tukar pada Suku Isirawa, melihat dampaknya bagi perempuan dan anak, serta memberikan analisis reflektif dari sudut pandang feminis mengenai hal tersebut. Penelitian ini menggunakan metode kualitatif etnografi feminis, melalui studi kepustakaan, wawancara, dan observasi. Hasilnya ditemukan bahwa pada sistem tukar-menukar maskawin tersebut jika dilihat dari sisi positif memiliki makna perempuan atau anak dianggap sangat berharga dan penting bagi masyarakat Isirawa, yakni untuk mempererat kekerabatan antar keluarga dan rumpun, meneruskan marga, dan sebagai alat perdamaian konflik seperti untuk mencegah kekerasan dalam rumah tangga. Tetapi, di sisi lain memiliki dampak negatif yang merugikan, beberapa di antaranya membatasi hak-hak perempuan, terjadi kekerasan, dan perlakuan tidak adil terhadap perempuan dan anak. Dengan demikian, perlu dikritisi dan dipertimbangkan untuk mengubah beberapa bagian tradisi yang memarinalkan tersebut dengan bersama-sama memberi solusi, pemahaman, dan nilai Kristiani yang baru, sehingga tidak serta-merta menghilangkan total budaya yang ada. Sebaliknya, tradisi tetap dapat terlaksana untuk menyejahterakan umat tanpa merugikan salah satu pihak.

Legal support for preventing and combating land flooding in Ukraine

Due to global warming, over-regulation of water bodies, disruption of water runoff, poor functioning or complete lack of drainage systems, reduction of forest areas, our state will not avoid the problems associated with flooding. The harmful effects of water are due to global factors, such as warming and melting glaciers, as well as regional features, including the water exchange system between water bodies, changes in rainfall and river runoff. Land flooding is a phenomenon that cannot be completely prevented. However, human activity increases its likelihood and impact. The risk of flooding and the degree of damage caused, as well as the impact on the health and socio-economic situation of those affected, will continue to increase in the future due to climate change. Inadequate river management, construction in flood-prone areas and the growing population living in these areas exacerbate the effects of flooding. Ukraine has already taken appropriate steps to implement the provisions of international acts in the field of preventing and combating land flooding into national legislation. However, the quality of implementation of national programs in this area requires better, as most measures, unfortunately, are not implemented. Failure to implement measures in certain amounts creates high risks of flooding, as a result of which the population and the economy of the state suffer multimillion losses. Keywords: land flooding, harmful effects of water, threats and risks of flooding, basin-based water management, climate change, global warming

From Cold Resistor to Secure Key Exchanger

Utilizing a formerly published cold resistor circuitry, a secure key exchange system is conceived and explored. A circuit realization of the system is constructed and simulated. Similar to the Pao-Lo key exchanger, this system is secure in the steady-state limit but crackable in the transient situations.

The recirculated aquaculture system (RAS) development with nanobubble application to improve growth performance of grouper fish fry culture

One of the aquaculture commodities with high economic value is grouper fish (Epinephelus sp.). RAS is known as one of superior and suitable aquaculture systems in juvenile fish culture. RAS installed with NBs is expected to increase the stocking density and production of hybrid brown-marbled grouper. This study aimed to analyze the system performance of grouper fish juvenile culture in high stocking density with water exchange system, RAS, and combination of RAS and NBs. This study used a factorial design with two factors, namely different stocking densities and cultivation systems. The densities were 500, 600 and 700 fish/m3, while the treatment systems were RAS without NBs, RAS installed with NBs, and control treatment with 200% water change. Each treatment was replicated three times. The total aquaria used for this study were 27 as each size was 1.5 m × 0.5 m × 0.5 m. The study results showed that the RAS installed with NBs and a stocking density of 600 fish/m2 showed the best results on fish production performance. Keywords: density, growth, grouper, nanobubble, RAS ABSTRAK Pendederan ikan kerapu meripakan salah satu segmen dalam usaha budidaya ikan kerapu (Epinephelus sp.). Salah satu sistem akuakultur yang cocok yang dapat digunakan dalam pendederan ikan kerapu ini adalah sistem recirculated aquaculture system (RAS). RAS dengan instalasi nanobubble (NBs) ini diharapkan bisa meningkatkan padat tebar dan kinerja produksi benih ikan kerapu. Penelitian ini bertujuan untuk menganalisis kinerja sistem pendederan ikan kerapu dengan padat tebar tinggi berbasis sistem pergantian air, RAS, dan perpaduan antara RAS dan NBs. Rancangan percobaan yang digunakan dalam penelitian ini adalah faktorial dengan dua faktor, yaitu padat tebar dan sistem budidaya berbeda. Padat tebar yang digunakan adalah 500, 600, dan 700 ekor/m3, sedangkan sistem budidaya terdiri dari RAS tanpa NBs, RAS dengan NBs dan kontrol (sistem pergantian air 200%), setiap perlakuan terdiri dari atas tiga ulangan. Hasil penelitian menunjukkan bahwa pendederan menggunakan RAS dengan NBs dengan padat tebar 600 ekor/m2 menunjukkan kinerja produksi ikan kerapu yang terbaik. Kata kunci: ikan kerapu, kepadatan, nanobubble, pertumbuhan, RAS

The heat supply object thermal regime under conditions of gas infrared emitter and air exchange system joint operation

The paper presents the results of experimental studies on the formation of thermal comfort conditions in large premises with the joint operation of gas infrared emitters and air exchange ventilation system. The values of temperatures and heat fluxes on the clothing surface under natural and mixed convection conditions were obtained. It has been established that the air exchange system operation in the premises reduces the temperature drop of the person clothes surface, respectively, a more favorable temperature condition is achieved in the working area.

Skupinové pohřebiště únětické kultury z Lovosic (okr. Litoměřice). K funerálním areálům starší doby bronzové v severozápadních Čechách / The Únětice Culture Group Cemetery from Lovosice (Litoměřice District). On Early Bronze Age Burial Grounds in Northwest Bohemia

The subject of the article is the “group” Unětice culture cemetery from the Early Bronze Age investigated in 2014 in Lovosice (Litoměřice district, northwest Bohemia). The cemetery’s dating to 2021–1751 BC corresponds to the mature stage of the Unětice culture in other parts of Bohemia (Moucha’s preclassical and classical stages). The cemetery is characterised by stone and apparently even wooden structures, multiple burials and the exclusive presence of miniature vessels. The population was composed primarily of old adults with the corresponding degenerative productive changes; only two non-adults were determined. Epigenetic marks on the skeletons testifying to a certain degree of kinship between the buried individuals were documented at the group cemetery and outside of it. New excavations have provided more detailed information on the spatial structure of burial grounds which, in addition to large cemeteries (of the Liběšovice, Březno near Louny, and Velke Žernoseky type), are composed of cemeteries with 10–20 graves, small groups of graves and solitary graves. These are also frequently accompanied by contemporary settlements located either close to the cemeteries or, as in the case of Lovosice, in the middle of the burial grounds. The spatial distribution of exogenous artefacts (amber beads, gold ornaments, silicite daggers) points to the possibility of the existence of an established network of long-distance routes in northwest Bohemia in the Early Bronze Age. One of the possible nodal points connected to the long-distance exchange system could have been located in the lower Ohře River region. This is documented, among other things, by the concentration of burial grounds with exceptional finds, settlements with evidence of metallurgy and the largest Bohemian hoards of ingots concentrated in the geographically defined microregion of Lovosice.