bluuebunny/crossref_metadata_2025 huggingface dataset:
Upaya Pengembangan Layanan Melalui "Program SATU KECAMATAN SATU BUKU (SAKE SABUK)" di Perpustakaan Umum Kabupaten Sumedang
Authors: Auliah Lia Fitri , Sukaesih Sukaesih , Prahatmaja Nurmaya
Published: December 2022

The development of services in the library can be implemented through certain programs that are related to the objectives to be achieved in the library, one of which is information services related to regional characteristics contained in the Satu Kecamatan Satu Buku (Sake Sabuk) Program. The purpose of this study was to describe and analyze the Sake Sabuk Program as an effort to develop services at the Sumedang District Public Library. The research method used is qualitative. Data were obtained through interviews, observation, documentation, and literature study. The research results obtained that the efforts made by the Sumedang District Public Library by implementing the Sake Sabuk Program had a good impact on service development activities in the library. The community becomes aware of the uniqueness of the Sumedang Regency area. In its implementation, this program received various support from both internal and external parties. In addition, the implementation of the program is inseparable from obstacles, namely the lack of direct and indirect socialization and promotion activities in the community. Many people, especially in Sumedang Regency, are still not aware of this program.
ASSESSMENT OF VIRGIN COCONUT OIL (VCO) WITH GATE-TO-GATE LIFE CYCLE ASSESSMENT ANALYSIS APPROACH
Authors: Putra Giovanni Ruly , Aryanto Reifaldy Tsany Betta , Syifaurrahmah Syifaurrahmah , Priutama Yesaya Emeraldy , Sari Mega Mutiara , Suryawan I Wayan Koko
Published: December 2022

VCO or Virgin Coconut Oil is a high-quality crude oil extract formed from coconut without chemical compound addition or high-temperature heating. The differences between VCO and other coconut oil are commercial coconut oil produced from copra or dried coconut meat. Life Cycle Assessment (LCA) is a method used to assess a product based on its lifespan, starting from extracting raw materials for the product to the industrial manufacturing process to product distribution. This LCA aims to implement zero waste on VCO Production by using wasted coconut water in some product that has economic value. We suggest a solution for coconut water waster with two alternatives, namely nata de coco production and coconut shell charcoal. Options to improve environmental quality were selected based on wastewater parameters and the resulting CO2 equivalent.
Uji Kuat Lekat dan Penjangkaran Beton Memadat Mandiri dengan Bahan Tambah Aktivator Alkali dan Metakaolin
Authors: Wibowo Wibowo , Basuki Achmad , Sanjaya Muchsan Maulana
Published: December 2022

Beton mutu tinggi memadat mandiri adalah beton yang mampu mengisi ruang-ruang kosong dengan berat sendiri tanpa
memerlukan bantuan alat pemadat serta memiliki nilai kuat tekan lebih besar atau sama dengan 41,4 MPa. Kuat Lekat dan
Kapasitas Penjangkaran beton merupakan salah satu parameter untuk menentukan hubungan antara beton dengan baja
tulangan. Kuat Lekat merupakan kemampuan beton dalam mengikat baja tulangan untuk menahan geser. Kuat lekat juga akan
meningkat seiring dengan kedalam penjangkaran baja tulangan. Penjangkaran akan memberikan hasil maksimal dengan jarak
kedalaman tertentu. Penelitian ini menggunakan metode eksperimen dan metode teoritis. Sampel uji yang digunakan berbentuk
silinder dengan dimensi diameter 15 cm dan tinggi 30 cm dan baja ulir tulangan yang tertanam sepanjang 70 cm dan diameter
10 mm dengan total sampel uji 12 buah. Bahan tambah metakaolin yang digunakan sebanyak 17,5% dari berat semen dan
variasi perbandingan aktivator alkali (Na2SiO3 dan NaOH) berturut-turut sebesar 0; 0,5; 1; dan 1,5. Hasil dari pengujian yang
dilakukan menunjukan bahwa pada penambahan aktivator alkali dengan perbandingan 2/2 dan 2/3 tidak memenuhi syarat uji
v-funnel test dan pada perbandingan aktivator alkali 3/2 tidak memenuhi syarat l-box test. Hasil uji kuat tekan menunjukan
bahwa semua sampel uji termasuk dalam beton mutu tinggi dikarenakan nilai kuat tekan yang dihasilkan telah melebihi 41,4
Mpa dan nilai tertinggi terdapat pada perbandingan aktivator alkali sebesar 2/2 yang memiliki nilai kuat tekan sebesar 46,90
MPa. Uji kuat lekat dan penjangkaran dilakukan pada sampel yang telah berumur 28 hari, pengujian ini menggunakan Universal
Testing Machine (UTM) dengan tambahan dial untuk mengetahui besar slip yang terjadi pada baja tulangan sampel uji. Uji kuat
lekat saat terjadi slip 2,5 mm pada variasi perbandingan aktivator alkali 0; 0,5; 1; dan 1,5 menghasilkan besar nilai berturutturut 0,9585 MPa; 1,1318 MPa; 1,1671 MPa; dan 0,9372 MPa. Uji kuat lekat pada saat Pmaks pada variasi perbandingan aktivator
alkali 0; 0,5; 1; dan 1,5 menghasilkan besar nilai berturut-turut 3,2751 MPa; 3,5721 MPa, 3,7419 MPa; dan 3,0133 MPa.
Berdasarkan hasil pengujian tersebut nilai kuat lekat tertinggi terjadi pada variasi perbandingan aktivator alkali
(Na2SiO3:NaOH) sebesar 1.
KAJIAN MODULUS OF RUPTURE DAN KUAT TARIK BELAH PADA BETON BUBUK REAKTIF DENGAN VARIASI KOMPOSISI SILICA FUME
Authors: Wibowo Wibowo , Basuki Achmad , Habibi M. Haris
Published: December 2022

Reactive powder concrete merupakan jenis beton yang pada campurannya meniadakan penggunaan agregat kasar. Modulus of rupture dan kuat tarik belah beton adalah salah satu parameter yang digunakan guna mengetahui mutu beton. Modulus of rupture merupakan nilai kuat tarik tertinggi yang terdapat pada bagian bawah dari sebuah sampel balok. Kuat tarik belah adalah nilai kuat tarik tidak langsung yang bisa merefleksikan nilai kuat tarik yang sebenarnya Penelitian ini menggunakan metode teoritis dan metode eksperimen dengan jumlah total benda uji sebanyak 36 buah. Pengujian modulus of rupture menggunakan benda uji beton balok dengan dimensi panjang 40 cm, lebar 10 cm, dan tinggi 10 cm, sedangkan pengujian kuat tarik belah menggunakan benda uji beton silinder dengan dimensi tinggi 30 cm dan diameter 15 cm dengan variasi kadar penambahan silica fume sebesar 0%; 5%; 10%; 15%; 20%; dan 25%. Uji modulus of rupture dan kuat tarik belah dilaksanakan pada beton ketika sudah mencapai umur 28 hari.Uji modulus of rupture menggunakan mesin UTM (universal testing machine), sedangkan uji kuat tarik belah menggunakan mesin CTM (compression testing machine). Hasil uji modulus of rupture dengan variasi kadar penambahan silica fume sebesar 0%; 5%; 10%; 15%; 20%; dan 25%, menghasilkan nilai sebesar 5,91 MPa; 6,35 MPa; 6,59 MPa; 7,30 MPa; 6,94 MPa; dan 6,47 MPa. Hasil uji kuat tarik belah dengan variasi kadar penambahan silica fume 0%; 5%; 10%; 15%; 20%; dan 25%, menghasilkan nilai sebesar 3,82 MPa; 4,12 MPa; 4,34 MPa; 4,78 MPa; 4,43 MPa dan 4,24 MPa.
KAJIAN EFEKTIVITAS PROYEK MENGGUNAKAN KONSEP VALUE ENGINEERING PADA PROYEK GEDUNG (STUDI KASUS: GEDUNG POLRES KOTA BEKASI)
Authors: Pramesti Dea Maulida , Handayani Fajar Sri , Suryoto Suryoto
Published: December 2022

Dalam proyek konstruksi, sering kali ditemukan berbagai kendala yang dapat menganggu keberjalanan suatu proyek, salah satunya adalah kendala keterbatasan anggaran. Value engineering sebagai suatu metode pendekatan sistematis dalam mengidentifikasi sebuah peluang untuk menghilangkan biaya yang tidak perlu tanpa menghilangkan fungsinya merupakan salah satu metode dapat mengatasi kendala tersebut. Kajian value engineering ini dilakukan agar dapat mengetahui alternatif desain struktur pelat, balok, dan kolom pada proyek pembangunan Gedung Polres Kota Bekasi. Data yang digunakan dalam kajian ini adalah data primer berupa gambar kerja, harga satuan upah dan pekerjaan wilayah Kota Bekasi, serta kuisioner yang telah diisi oleh responden. Alternatif yang diajukan pada kajian ini adalah alternatif satu berupa pelat, kolom, dan balok full-precast serta kemudian ada alternatif 2 berupa pelat half-precast sedangkan kolom dan balok full-precast. Pemilihan alternatif dilakukan dengan pembobotan berdasarkan kriteria kualitatif serta kuantitatif. Kriteria kualitatif yang didapatkan dari hasil kuisioner responden dihitung dengan metode AHP, yaitu dengan membandingan tiap kriteria secara berpasangan. Hasil analisis menunjukan alternatif 1 sebagai alternatif terpilih. Alternatif 1 yang terpilih dapat menghemat biaya sebesar Rp. 898.530.673,76 dengan presentase penghematan pekerjaan struktur atas sebesar 9%.
KAJIAN SERAPAN CO2 PADA BETON BUBUK REAKTIF DENGAN SILICA FUME 15% DAN VARIASI PASIR KUARSA
Authors: Wibowo Wibowo , Safitri Endah , Wicaksono Maulana Kangko
Published: December 2022

Pembangunan infrastruktur di Indonesia merupakan prioritas pemerintah dalam beberapa tahun kedepan. Durabilitas beton merupakan faktor penting bagi  dunia konstruksi.Beton dituntut memiliki mutu yang baik serta tahan terhadap berbagai kondisi. Jumlah pori pada beton merupakan faktor yang mempengaruhi durabilitas beton. Hal yang menyebabkan rendahnya durabilitas beton adalah besarnya jumlah pori pada beton. Bubuk beton reaktif merupakan inovasi terkini dibidang teknologi beton dengan memanfaatkan penggunaan partikel halus sebagai bahan penyusunya. Pasir kuarsa merupakan material penyusun bubuk beton reaktif yang dapat mengisi rongga pada campuran beton, memperkecil ukuran pori campuran beton, dan mengurangi permeabilitas beton. Penelitian ini memiliki tujuan untuk mengetahui penggunaan variasi pasir kuarsa 0%; 15%; 20%; 25%; 30%; 35% dan 40% pada beton bubuk reaktif terhadap nilai serapan CO2. Metode eksperimental merupakan metode penelitian yang digunakan dengan sample uji beton tabung yang memiliki diameter 7,5 cm dan tinggi 15 cm yang berjumlah 21 buah. Pengujian serapan CO2 dilaksanakan dengan merendam sample uji ke dalam larutan karbonat 4% selama 10+0,5 menit dan 24 jam lalu menimbang pada kondisi kering permukaan lalu membandingkan hasil tersebut dengan berat pada saat kering oven. Nilai serapan CO2 terendah yaitu pada kadar penggunaan pasir kuarsa 30% dari total berat agregat, mampu menurunkan serapan beton hingga 43,18% dalam perendaman selama 10+0,5 menit dan dapat mengurangi serapan beton sebesar 36,77% dalam perendaman selama 24 jam.
PENGARUH DIMENSI PONDASI DAN KAPASITAS MESIN TERHADAP RESPON STATIS PONDASI MESIN DANGKAL
Authors: Arrasyidi Addina Salam , Surjandari Niken Silmi , Fitri Siti Nurlita
Published: December 2022

Pertumbuhan ekonomi dan penduduk di Indonesia mengakibatkan kebutuhan listrik yang meningkat. Salah satu cara mengatasi kebutuhan listrik yang terus meningkat adalah dengan membangun pembangkit listrik tenaga mikro hidro. Mesin PLTMH Ketika digunakan akan mengalami getaran yang dapat membahayakan mesin itu sendiri maupun lingkungan disekitarnya. Sehingga dibutuhkan pondasi mesin yang dapat meredam getaran mesin dan aman terhadap respon statis mesin PLTMH. Penelitian ini bertujuan untuk mengetahui bagaimana pengaruh dimensi pondasi dan kapasitas mesin terhadap respon statis pondasi mesin. Dengan variasi panjang dan lebar pondasi sebesar 0,5 m. Untuk variasi mesin yang digunakan adalah mesin dengan kapasitas 1000, 1500, dan 1200 rpm. Metode analisa yang digunakan adalah metode meyerhof. Hasil yang didapatkan dari penelitian ini adalah semakin besar panjang pondasi, maka akan terjadi penurunan daya dukung sebesar 6,67%, sedangkan semakin besar luas penampang pondasi maka akan terjadi penurunan tegangan statis sebesar 3% untuk semua mesin.
KAJIAN KUAT TEKAN DAN MODULUS ELASTISITAS PADA BETON MEMADAT MANDIRI MUTU TINGGI DENGAN METAKAOLIN 12,5% SEBAGAI SEMEN DAN VARIASI STEEL SLAG SEBAGAI SUBSTITUSI AGREGAT HALUS
Authors: Wibowo Wibowo , Purwanto Purwanto , Syuja Muhammad Nasirudin
Published: December 2022

Beton sebagai bahan konstruksi dipilih sebagai bahan utama karena harga yang lebih ekonomis dan bahan baku yang dibutuhkan dalam pembuatan mudah untuk ditemukan. Beton memadat mandiri (Self Compacting Concrete) dengan bahan tambah metakaolin 12,5% dan Steel Slag  mampu meningkatkan mutu beton sehingga memenuhi standar syarat Beton Mutu Tinggi dengan kuat tekan lebih dari 41,4 MPa. Beton mutu tinggi memadat mandiri menggunakan bahan tambah metakaolin 12,5% dan variasi Steel Slag 0%, 15%, 17,5%, 20%, 22,5% dan 25%. Penelitian dilaksanakan untuk mendapatkan karakteristik dari beton segar untuk memenuhi syarat sebagai beton SCC. Setelah memenuhi syarat sebagai beton SCC, selanjutnya dilakukan pengujian terhadap nilai kuat tekan dan modulus elastisitas beton. Berdasarkan hasil penelitian, didapatkan nilai kuat tekan maksimum dan grafik hubungan tegangan-regangan untuk perhitungan modulus elastisitas. Beton dengan tambahan Steel Slag memenuhi syarat sebagai beton SCC dengan kuat tekan dan modulus elastisitas beton maksimum terjadi pada kadar Steel Slag 22,5% dengan nilai kuat tekan sebesar 62,17 MPa dan modulus elastisitas sebesar 31179,2 MPa menggunakan standar perhitungan Eurocode 2-1992.
KAJIAN NILAI SUSUT KERING PADA BETON MEMADAT MANDIRI MUTU TINGGI DENGAN METAKAOLIN 12,5% DAN VARIASI LIMBAH PECAHAN KERAMIK
Authors: Wibowo Wibowo , Safitri Endah , Wicaksana Nanda Yusuf Pribadi
Published: December 2022

Perkembangan industri konstruksi perlu ditunjang dengan adanya inovasi untuk mengatasi permasalahan di dalamnya. Beberapa permasalahan yang muncul adalah sulitnya beton segar mengalir melalui tulangan dan melimpahnya limbah padat konstruksi. Penggunaan kembali limbah padat konstruksi khususnya limbah pecahan keramik sebagai inovasi substitusi agregat kasar alami pada beton mutu tinggi memadat mandiri dapat menjadi solusi permasalahn di atas. Metakaolin pada penelitian ini merupakan alternatif substitusi semen. Susut kering adalah berkurangnya volume beton akibat hilangnya air pada beton yang dapat menyebabkan rtak apada beton. Oleh karena itu perlu dikaji mengenai nilai susut kering pada beton. Benda uji yang digunakan pada penelitian ini berupa balok berukuran 300x100x100 mm. Pengujian susut kering beton dilaksanakan mulai dari beton berumur 1 hari – 28 hari dengan menggunakan alat Demec Gauge. Hasil penelitian ini menunjukkan bahwa substitusi metakaolin 12,5% dari berat semen dan subtitusi agregat kasar alami dengan agregat limbah pecahan keramik memenuhi parameter beton memadat mandiri berdasarkan EFNARC 2005 dan mampu meningkatkan nilai susut kering beton. Penggantian variasi agregat limbah pecahan keramik dengan kadar 0%, 20%, 30%, dan 40% menghasilkan nilai susut kering berturut-turut 605,152; 643,238; 702,264; dan 778,750. Nilai susut kering beton semakin meningkat seiring bertambahnya subtitusi agregat limbah pecahan keramik.
Pengaruh Diameter Tulangan Terhadap Kuat Lekat Pada High Volume Fly Ash Self Compacting Concrete (HVFA-SCC) Dengan Tulangan Tersambung
Authors: Basuki Achmad , Auliarahman Muhammad Daffa , Saifullah Halwan Alfisa
Published: December 2022

Semen merupakan produk yang paling banyak digunakan kedua setelah air di dunia. Meningkatnya infrastruktur membuat kebutuhan semen semakin meningkat. Meningkatnya permintaan akan semen, maka diperlukan inovasi beton yang dapat mengurangi kebutuhan semen agar mengurangi pencemaran lingkungan. Salah satu inovasi yang dikembangkan saat ini adalah beton High Volume Fly Ash (HVFA) dan beton Self Compacting Concrete (SCC). Beton High Volume Fly Ash (HVFA) adalah beton yang mengandung fly ash sebagai substituent semen dengan minimal kadar yang tergantikan adalah 50% dari berat total binder. Metode penelitianyang digunakan adalah metode eksperimental dengan tempat pengujian di Laboratorium Bahan Konstruksi dan Struktur program studi Teknik Sipil Fakultas Teknik Universitas Sebelas Maret. Sampel benda uji yang digunakan berupa balok beton bertulang dengan dimensi sebesar 15 cm x 25 cm x 200 cm. Beton yang digunakan memiliki kuat tekan f’c sebesar 30 MPa dan sepsifikasi tulangan ulir dengan kuat leleh fy 405 MPa dengan panjang lewatan sepanjang 300 mm.
PREDIKSI SISA UMUR LAYAN MENGGUNAKAN METODE PAVEMENT CONDITION INDEX (PCI) PADA JALAN NASIONAL (Studi Kasus : Ruas Jalan Lingkar Kudus Timur - Batas Kabupaten Pati)
Authors: Syahnanda Alifsa , Setyawan Ary , Pramesti Florentina Pungky
Published: December 2022

Jalan merupakan sarana transportasi yang mendukung infrastruktur perekonomian sebagai tempat pergerakan arus lalu lintas orang maupun barang dari suatu tempat ke tempat lain. Banyaknya kendaraan melintas dan beban berlebih menyebabkan kerusakan jalan sehingga mengalami penurunan umur rencana atau kerusakan dini. Diperlukan upaya untuk memperbaiki perkerasan ruas jalan tersebut agar fungsi jalan tetap efisien, efektif dan sesuai umur rencana sehingga tercipta rasa aman dan nyaman bagi pengguna jalan.

Ruas Jalan Lingkar Kudus Timur - Batas Kabupaten Pati merupakan jalan arteri primer, berdasarkan statusnya ruas jalan tersebut merupakan jalan nasional yang berperan penting dalam perekonomian serta perkembangan wilayah di sekitar jalan tersebut. Ruas jalan ini merupakan jalur kendaraan berat seperti, truk, trailer, bus, dan kendaraan lainnya. Pada penelitian ini menggunakan metode deskriptif analitis. Pada penelitian ini Metode Pavement Condition Index (PCI) digunakan dalam memprediksi kerusakan jalan secara visual dan memprediksi sisa umur layan perkerasan jalan. Metode PCI dilakukan dengan mengamati titik titik kerusakan pada jalan kemudian diolah menjadi nilai kerusakan jalan. Selain untuk menentukan kondisi perkerasan, nilai PCI kemudian dikonverensi dalam bentuk tahun untuk mencari sisa umur layan.

Hasil prediksi sisa umur layan pada ruas jalan Lingkar Kudus Timur - Batas Kabupaten Pati menghasilkan rata-rata nilai PCI sebesar 45,67 sehingga memiliki kriteria kondisi jalan “poor” dengan sisa umur layan 0,93 tahun. Hal ini menunjukkan bahwa pada ruas jalan tersebut memiliki sisa umur layan kurang dari 1 tahun, sehingga perlu segera dilakukan perbaikan jalan agar fungsi jalan dapat kembali optimal.
Previsão de demanda de peças sobressalentes utilizando rede neural artificial
Authors: Castro Soares Laura Maria , Gonçalves Castro Silva Ana Cristina , Castro Silva José de , Souza Santos Pedro Vieira
Published: December 2022

Em relação à manutenção de ativos, sabe-que que a previsão de demanda para reposição de peças é uma condição importante para a gestão de estoques, visando diminuir custos e evitar a obsolescência de produtos. É evidente que a utilização de métodos preditivos com maior grau de precisão é uma ferramenta fundamental nesse contexto, frente à falta de peças e a super estocagem. Desse modo, o presente trabalho tem por objetivo avaliar o desempenho de uma rede neural artificial na predição de demanda de peças de reposição de um setor de manutenção de tratores agrícolas. Para isso, utilizou-se como método de avaliação e monitoramento a análise dos erros percentuais médios absolutos da previsão. Com intuito de alcançar o objetivo proposto, buscou-se, primeiramente, o estudo dos principais aspectos teóricos relacionados à gestão de estoques e aos métodos de previsão de demanda. Posteriormente, foi feita a seleção das redes Elman para o estudo, e em relação à seleção de peças para análise, ferramentas de gestão de estoques foram utilizadas, visando explorar itens importantes para o setor. Mediante a utilização da metodologia proposta, os resultados mostraram que as redes neurais possuem uma boa aplicação para o contexto em questão, pois, além de apresentar configurações com erros aceitáveis, por várias vezes a rede acertou os picos de maiores e menores demandas, análise importante para a gestão de estoques.
Palavras-chave: Manutenção; Gestão de Estoques; Previsão de Demanda; Redes Neurais.
A transferência de tecnologia como base da evolução de países em desenvolvimento
Authors: Gaudie-Ley Lucas Wanderley , Azevedo Netto Adriana , Fonseca Estefan Monteiro da
Published: December 2022

Durante a última década, o desenvolvimento sustentável tem sido encarado por diversas nações globais como a prática ideal a ser alcançada, sendo inclusive foco da ONU através de suas últimas deliberações (17 Objetivos de Desenvolvimento Sustentável, de 2012 - ODS). A situação pós-pandemia do COVID-19 reforçou ainda mais a necessidade de políticas públicas que levem em consideração o equilíbrio ambiental mundial no que tange à gestão dos recursos ambientais, já em diversos casos, escassos. Neste cenário, a tecnologia continua a ser vista como um elemento-chave na transição para um modelo mais equilibrado. Por outro lado, as investidas internacionais para estimular a evolução dos países em desenvolvimento falharam em produzir resultados proporcionais às demandas. Além disso, o debate acadêmico se mostrou insatisfatório.
DETERMINATION OF THE MECHANISM OF INTERACTION OF Cu2 +, Pb2 + METHOD OF FTIR SPECTROSCOPY IN THE MIDDLE REGION
Authors: Rudneva K.
Published: December 2022

The object of the study is to determine the interaction of copper and lead ions in aqueous weakly acidic solutions. According to the analysis of modern scientific works, recently not enough attention is paid to the study of sorption properties of humates after regeneration, so for further use of humic acids as sorbents, including regenerated, it is important to obtain data on stoichiometric interaction of humic acids with various metals. In this work, humic acids were isolated from commercial potassium humate produced in China. Model solutions of copper (II) sulfate and lead (II) acetate were used in the research. The exact content of copper and lead for the final solutions prepared from model with subsequent regeneration of humate-metal complexes was determined by inductively coupled plasma atomic emission spectroscopy (ICP-AES). Regeneration was carried out by reducing the acidity by adding 1 n nitric acid. The spectra were recorded by FTIR spectroscopy in the middle region. Interpretation of the spectra of the starting humic acids, potassium humates, as well as copper and lead humates was carried out by adjusting the literature data.

Studies of the structure of humic acids and humates of metals and by this method have shown the active involvement of carboxyl groups in the formation of humate-metal bonds. Humic acids after regeneration (reduction) contain carboxyl groups in the dimerized state, in contrast to freshly prepared humic acids. In lead humates, the above general nature of changes in the spectral pattern from humic acids to lead humates is repeated for copper humates, which can be explained in the general theory of FTIR spectroscopy by increasing the reduced mass of a group of atoms involved in oscillations due to significantly higher atomic mass of pigs. compared to copper.

It was also found that sorption occurs as a result of stoichiometric reaction, due to which chelate complexes of copper and lead are formed by interaction with oxygen atoms in the carboxyl groups of humate molecules.
PHYSICO-CHEMICAL FOUNDATIONS OF INNOVATIVE TECHNOLOGIES IN THE FIELD OF PHOTOCATALYSIS
Authors: Djenyuk A. , Sakhnenko M. , Karakurkchi H. , Galak A. , Indykov S. , Yar-Mukhamedova Gulmira
Published: December 2022

An analysis of the physical and chemical foundations of the synthesis of photocatalytic materials on metal platforms was carried out in terms of the restructuring of the country's industrial production according to the new Industry 4.0 paradigm. Possible ways to improve the functional properties of such materials are determined using titanium dioxide as the most effective and accessible material for creating photocatalysts by doping with non-metal and metal compounds or creating composites and non-stoichiometric oxides as an example. A variant way of creating heterooxide composites by inversion of the elements of the structure-forming matrices and the strengthening phase is proposed. A detailed analysis of the problems arising during the surface treatment of high-alloy valve metal alloys by electrochemical technologies is given, and directions for solving such problems due to the homogenization of the surface layers of the processed materials are determined. A technological scheme for the implementation of such a methodology for variable scenarios using plasma-electrolyte oxidation is proposed. The difference in the electrochemical characteristics of heterooxide composites depending on the nature of the dopants was established, which is fully consistent with the nature of the latter.
PROSPECTS OF SEARCHES AND PROBLEMS OF GAS DEVELOPMENT OF SEALED COLLECTORS OF THE DNIPRO-DONETSK DEPRESSION
Authors: Laziebna Yu. , Zezekalo I. , Dmitrenko V.
Published: December 2022

The article considers the current problem of the hydrocarbon base of Ukraine. Materials that can serve as prerequisites for exploration and further development of gas from compacted reservoirs on the territory of the Dnieper-Donetsk graben are analyzed. In this article, the main parameters, that indicate the presence of gas in compacted reservoirs, are briefly considered. The data contain information about the features of the sedimentary section of the Paleozoic complex, namely, the geological structure of promising areas, the degree of catagenesis of gas-bearing rocks, the content of organic carbon in parent rocks, reservoir properties, and depths of gas-promising intervals. These data, taken from the results of drilling numerous wells, indicate a high probability of successful exploration for central basin gas within the axial zone of the Dnieper-Donetsk basin. As such deposits are difficult to extract, due to the complex geological structure of promising areas, a wide range of depths and, above all, poor reservoir properties of rocks containing gas, its development is impossible without the use of intensification methods. There are many chemical, thermal, mechanical technologies to cause the inflow of fluid from the reservoir, among which the hydraulic fracturing of the reservoir has become widespread. Modern methods of intensification are quite effective, but still remain imperfect, and therefore, there are some defects that cause certain complications in the development of the deposit. Тo cause the inflow of hydrocarbons from the compacted reservoirs, a foam gap of the formation is indicated, the use of which, in the opinion of the authors, is appropriate for deposits of this type. The article also points out the advantages of using a foam system compared to conventional fracturing and the need to improve some indicators of the foam system to its further use for compacted terrigenous reservoirs of the Dnieper-Donetsk avlakogen.
A morphological and chemical classification of bronze corrosion features from an Iron Age hoard (Tintignac, France): the effect of metallurgical factors
Authors: Ghiara Giorgia , Maniquet Christophe , Carnasciali Maria Maddalena , Piccardo Paolo
Published: December 2022

A categorization of corrosion morphologies of archaeological Sn bronzes was carried out on archaeological Iron Age objects. The objects come from a Celtic deposit located in central France (Tintignac, Corrèze) and are dated between 2nd and 3rd cent BC. Being samples of corroded metals taken from a single find spot, parameters connected to the features of the alloy and known to influence the corrosion morphologies were thoroughly considered. Global processes were highlighted, and corrosion mechanisms were characterized with a multi-analytical protocol (SEM-EDS, micro-Raman spectroscopy, image analyses) according to the detected morphology. Elaboration of the results was carried out with a multicomponent approach. Results show the presence of 5 different morphologies correlated to the alloys characteristics of the objects. Alloy composition, microstructure, degree of deformation and grain size were found to influence the corrosion products formed and the morphology of the attack. In particular, the ‘tentacle like corrosion’, associated to a microbial attack was the most susceptible to the effect of metallurgical features: their occurrence is connected to a higher presence of Fe and Pb in the alloy, a homogeneous deformation and a larger grain size.
A MATHMET Quality Management System for data, software, and guidelines
Authors: Lines Keith , Hippolyte Jean-Laurent , George Indhu , Harris Peter
Published: December 2022

The European Metrology Network for Mathematics and Statistics (MATHMET) is creating a Quality Management System (QMS) to ensure that research outputs in the forms of data, software and guidelines are fit-for-purpose, achieve a sufficient level of quality, and are consistent with the aims of National Measurement Institutes to provide quality-assured and trusted outputs. The essential components of the QMS for all three forms of research output are discussed. On-line, interactive risk assessment tools that guide a user through the process of assigning an integrity level for the research outputs of data and software, are described. Examples of case studies that have been used to demonstrate the QMS are indicated.
Factors Associated with Mortality of Neonates Admitted to a Tertiary Care Neonatal Unit
Authors:   MPH, Student, School of Public Health, Department of Community Medicine, JSS Medical College, Mysore 570015, Karnataka, India., Tiwari Rajiv Ranjan , D Srinivasa Murthy ,   MPH, Student, School of Public Health, Department of Community Medicine, JSS Medical College, Mysore 570015, Karnataka, India., Bilimale Anil S ,   Assistant Professor, Department of Community Medicine, JSS Medical College, Mysore 570015, Karnataka, India., D Sunil Kumar ,   Head & Professor, Department of Community Medicine, JSS Medical College, Mysore 570015, Karnataka, India., Kundu Rituparna ,   MPH, Student, School of Public Health, Department of Community Medicine, JSS Medical College, Mysore 570015, Karnataka, India., Sakhi Padma ,   MPH, Student, School of Public Health, Department of Community Medicine, JSS Medical College, Mysore 570015, Karnataka, India.
Published: December 2022

Background: The neonatal period is the most susceptible phase of life. In the aim of this study was to assess the causes and factors associated with neonatal mortality. Methodology: This study was a Retrospective study of medical records for 2 years (Jan. 2020- Dec. 2021). The age, sex, gestational age, and morbidity and mortality profile of all SNCU admissions in 1 year were determined, and the difference between inborn (those born in Hospital) and out born (neonates delivered outside and referred) was calculated. Results: Of the 1600 neonates admitted, 61.5% neonates were males, 57.4% were Inborn and 42.8% were outborn. Approximately, 33.4% were preterm, and renal cardiovascular (20.4%), Neurological disorder (18.6%), and Respiratory related infection (19.1%) were the chief morbidities. The chief causes of mortality were low birth weight with AOR 1.29 (0.836-2.0120), respiratory support that includes O2 with AOR 5.817 (3.367-10.051), CPAP with AOR 4.902 (2.745-8.754), CMV with AOR 4.251(2.184-8.274) and Level of Care with AOR 4.85 (3.102-11.471). This factor was statistically associated with neonatal mortality. Conclusion: Low birth weight, respiratory support, neonate size, and degree of care were all found to be associated with newborn mortality in this study. As a result, hospitals ought to emphasize enhancing antenatal, intrapartum, and standardized care for newly admitted infants. A prospective study is what we suggest.
Petroleum++: Lessons Learned as SPE Moves Forward
Authors: Kamal Medhat M.
Published: December 2022

For the first time since the 2018 SPE Annual Technical Conference and Exhibition (ATCE), the flagship technical conference was held in-person in the US. The COVID-19 pandemic forced us to meet virtually in 2020, and in 2021 we met in Dubai. It was exciting to start meeting our fellow SPE members in-person again. We had a successful ATCE with more than 5,500 members from 58 countries participating. The conference included the traditional technical program (the backbone of SPE meetings) and panel discussions that were highlighted by the opening general session where senior executives from operating oil and gas companies, service companies, and consulting firms shared their views about how to transform the industry for the future in a sustainable manner anchored by our traditional petroleum engineering activities.

Additional sessions included a special panel discussion designed to listen to the members’ ideas regarding the SPE Strategic Plan, which I will discuss later in this column. Along with the extensive technical program, the main feature of ATCE that included more than 400 peer-selected papers from more than 1,200 abstracts submitted to the program committee, ATCE featured expansive exhibits where more than 220 companies showed their services and products to the attending members. Maybe a photo from this year’s ATCE showing large number of members in the exhibition hall?

On the evening of the first day of the conference, alumni from various universities gathered at receptions to renew and start new friendships and discuss the future developments needed in petroleum engineering education at their universities. On Tuesday night, the Annual Reception and Awards Banquet honored members by presenting awards acknowledging the excellent contributions they made to our profession and in serving the members of the Society. On the last day of the conference, the President’s Luncheon and Annual Meeting of the Members was held where 2022 President Kamal Ben-Naceur discussed the state of the Society and passed the gavel to me to start the new year of SPE. Insert photo of passing the gavel? Feedback from members attending the conference was positive, and preparation for next year’s ATCE, which will be held in San Antonio, Texas, from 16–18 October, is underway. The Call for Papers is officially open at the 2023 ATCE site.

In 2022, several events took place that required a pause to think about their effect on our Society. It is time to close the chapter on these events, recognizing the lessons learned from them, and move forward with the main activities of SPE to provide members with the technical and professional support that allows us to provide the world with the energy it needs—safely, reliably, and in an environmentally friendly and affordable manner.
High-Temperature Water-Based Drilling Fluid Accesses Depleted Deepwater Reserves
Authors: Carpenter Chris
Published: December 2022

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This article, written by JPT Technology Editor Chris Carpenter, contains highlights of paper SPE 207825, “First Use of Novel High-Temperature Water-Based Reservoir Drilling Fluid To Access Depleted Deepwater Reserves,” by Alexandra C. Morrison, Conan King, SPE, and Kevin Rodrigue, Halliburton. The paper has not been peer reviewed.

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A combination of divalent base brine and high wellbore temperature presents significant challenges for high-density aqueous reservoir drilling fluids. Such systems traditionally use biopolymers as viscosifiers; however, they are subject to degradation at elevated temperatures. Nonaqueous drilling fluids are thermally stable, but complete removal of the filter cake is challenging, which can lead to formation damage. The complete paper describes the qualification and first deepwater drilling application of an aqueous reservoir drilling fluid at temperatures greater than 320°F.

Introduction

The laboratory development and scale-up yard trials of the high-temperature divalent brine-based reservoir drilling fluid (HT-RDF) and solids-free screen running fluid (SF-SRF) systems used for this well took several years. Specific rheology and fluid-loss targets were set and met during the design phase, and, in conjunction with hydraulic modeling, software simulations demonstrated that equivalent circulating densities (ECDs) would be acceptable based on well-construction plans. The HT-RDF showed excellent thermal stability in static age tests, which was crucial because of the plans for openhole logging of the production zone once total depth was reached. Screen plugging was identified early in the project as a key risk; the most-suitable mitigation for this was to engineer a completely solids-free fluid in which to install the sand screens. The resulting SF-SRF was designed to provide fluid-loss control and wellbore stability in case filter cake was stripped from the formation face during the screen run. Finally, given the focus on production maximization, the fluids underwent rigorous formation-damage tests, ultimately showing that a return permeability of greater than 60% was possible with the inclusion of an acid breaker to assist filter-cake dissolution.
Dynamic Control of Hybrid Grafted Perfect Vector Vortex Beams
Authors: Ahmed Hammad , Ansari Muhammad Afnan , Li Yan , Zentgraf Thomas , Mehmood Muhammad Qasim , Chen Xianzhong
Published: December 2022

Perfect vector vortex beams (PVVBs) with inhomogeneous polarization and spiral phase profiles have attracted considerable interest due to their peculiar optical features. PVVBs are typically generated through the superposition of perfect vortex beams, which suffer from the limited number of topological charges (TCs) in the involved vortex beams. To meet the requirement of time-varying systems, dynamic control of PVVBs is desirable and hasn’t been demonstrated. A grafted perfect vortex beam (GPVB) is an artificially engineered vortex beam with multiple TCs that are impossible with a conventional vortex beam. Here, for the first time, we propose and experimentally demonstrate hybrid grafted perfect vector vortex beams (GPVVBs) and the dynamic control of these beams. Hybrid GPVVBs are generated through the superposition of new hybrid GPVBs with a novel multifunctional metasurface. The generated hybrid GPVVBs possess spatially variant rates of polarization change in 2D space due to the involvement of more TCs. Remarkably, each hybrid GPVVB features multiple different GPVVBs in the same beam, adding more design flexibility. Furthermore, these beams are dynamically tuned with a rotating half waveplate, making the metasurface function as a dynamic optical device. The generated dynamic GPVVBs may find applications in the fields where dynamic control is in high demand, including optical encryption, dense data communication, and multiple particle manipulation.
Computational Intelligence in Hernia Surgery with Classification of Repair Types
Authors: Charvatova Hana , East Barbora , Prochazka Ales
Published: December 2022

Problems of the ventral hernia are very common and their evaluation by computational methods can help with the selection of the most appropriate treatment. This study collected data from the records of the set of more than 2800 patients from different European countries observed during last 11 years (2012-2022) and were collected by specialists in hernia surgery. The majority of patients were treated by the standard surgery approach, with the increasing trend towards robotic surgery. This paper is devoted to a statistical evaluation of the treatment method related to the age of the patients, their body mass index (BMI), and the type of repair. Appropriate mathematical methods are used to extract and classify the selected features.The proposed methodology focuses on computational and machine learning methods. Mesh hernia surgery is classified into two classes: groin hernia repairs (GHR) and primary ventral, incisional ventral and parastomal hernia repairs (PVHR, IVHR and PHR).This paper presents statistics of surgery hernia treatments related to the age of patients and repair technologies with different kinds of meshes. The main conclusions point to classification of repair technologies related to the BMI and the age of the patients. Separation accuracy of GHR surgery from other types of repairs reached 69.2 % and 70 % for the Bayesian and SVM methods, respectively. The proposed methodology suggests a very close interdisciplinary approach and the use of computational intelligence in hernia surgery, with its possible use in the clinical environment.
Game theory model of corporate governance: Fitting real market environment
Authors: Zhu Yunxuan
Published: December 2022

In this paper, we use two game models to fit the market subject behavior in corporate governance from dynamic dimension and static dimension, respectively. By further expanding the main governance subjects and adding variables with practical significance, such as "bribery" and "social welfare", into the game theory model, some conclusions with practical significance are found in this paper. For example, the factors such as the possibility to check out manager's violation, the punishment to the irregularities, the supervision cost of the supervisory board, have an important impact on the behavior of the corporate governance. In the static game model, this paper finds that intersubjective games and restrictions avoid “the worst result” to occur. Besides, social welfare even can be improved under certain conditions. In the multi-coexistence game model, the equilibrium point of the static game model is uncertain, which makes the social welfare situation uncertain. The conclusions of the two game models can be used for reference to further improve the corporate governance mechanism.
JEL classification: G30; M10; D21; D81
Padovan numbers which are concatenations of three repdigits
Authors: Bhoi Kisan , Ray Prasanta Kumar
Published: December 2022

Padovan sequence is a ternary recurrent sequence defined by the recurrence relation Pn+3 = Pn+1 + Pn with initial terms P0 = P1 = P2 = 1. In this study it is shown that 114, 151, 200, 265, 351, 465, 616, 816, 3329, 4410, 7739, 922111 are the only Padovan numbers which are concatenations of three repdigits.
2020 Mathematics Subject Classification: 11B39; 11J86; 11D61.
Longitudinal investigation of changes in resting-state co-activation patterns and their predictive ability in the zQ175 DN mouse model of Huntington’s disease
Authors: Adhikari Mohit H , Vasilkovska Tamara , Cachope Roger , Tang Haiying , Liu Longbin , Keliris Georgios A , Sanjuan Ignacio Munoz , Pustina Dorian , Linden Annemie Van der , Verhoye Marleen
Published: December 2022

Huntington’s disease (HD) is a neurodegenerative disorder caused by expanded (≥ 40) glutamine-encoding CAG repeats in the huntingtin gene, which leads to dysfunction and death of predominantly striatal and cortical neurons. While the genetic profile and clinical signs and symptoms of the disease are better known, changes in the functional architecture of the brain, especially before the clinical expression becomes apparent, are not fully and consistently characterized. In this study, we sought to uncover functional changes in the brain in the heterozygous (HET) zQ175 delta-neo (DN) mouse model at 3, 6, and 10 months of age, using resting-state functional magnetic resonance imaging (RS-fMRI). This mouse model shows molecular, cellular and circuitry alterations that worsen through age. Motor function disturbances are manifested in this model at 6 and 10 months of age. Specifically, we investigated, longitudinally, changes in co-activation patterns (CAPs) that are the transient states of brain activity constituting the resting-state networks (RSNs). Most robust changes in the temporal properties of CAPs occurred at the 10-month time point; the durations of two anti-correlated CAPs, characterized by simultaneous co-activation of default-mode like network (DMLN) and co-deactivation of lateral-cortical network (LCN) and vice-versa, were reduced in the zQ175 DN HET animals compared to the wild-type mice. Changes in the spatial properties, measured in terms of activation levels of different brain regions, during CAPs were found at all three ages and became progressively more pronounced at 6-, and 10 months of age. We then assessed the cross-validated predictive power of CAP metrics to distinguish HET animals from controls. Spatial properties of CAPs performed significantly better than the chance level at all three ages with 80% classification accuracy at 6 and 10 months of age.
A Performance Comparison of Heterostructure Surface Plasmon Resonance Biosensor for the Diagnosis of Novel Coronavirus SARS-CoV-2
Authors: Akib Tarik Bin Abdul , Mostufa Shahriar , Rana Md. Masud , HOSSAIN MD BIPLOB , Islam Md. Rabiul
Published: December 2022

This paper presents a performance comparison of heterostructure surface plasmon resonance (SPR) biosensors for the application of Novel Coronavirus SARS-CoV-2 diagnosis. The comparison is performed and compared with the existing literature based on the performance parameters in terms of several prisms such as BaF2, BK7, CaF2, CsF, SF6, and SiO2, several adhesion layers such as TiO2, Chromium, plasmonic metals such as Ag, Au, and two-dimensional (2D) transition metal dichalcogenides (TMDs) materials such as BP, Graphene, PtSe2 MoS2, MoSe2, WS2, WSe2. To study the performance of the heterostructure SPR sensor, the transfer matrix method (TMM) is applied, and to analyses, the electric field intensity (EFI) near the graphene-sensing layer contact, the finite-difference time-domain (FDTD) approach is utilized. Numerical results show that the heterostructure comprised of CaF2/TiO2/Ag/BP/Graphene/Sensing-layer has the best sensitivity and detection accuracy. The proposed sensor has an angle shift sensitivity of 390°/refractive index unit (RIU). Furthermore, the sensor achieved a detection accuracy (DA) of 0.464, a quality factor (QF) of 92.86/RIU, a figure of merit (FOM) of 87.95, and a combined sensitive factor (CSF) of 85.28. Furthermore, varied concentrations (0nM to 1000nM) of biomolecule binding interactions between ligands and analytes have been observed for the prospects of diagnosis of the SARS-CoV-2 virus. Results demonstrate that the proposed sensor is well suited for real-time and label-free detection particularly SARS-CoV-2 virus detection.
Investigating the Safety of Patients with Preoperative Tachycardia and Hypertension Undergoing Sleeve Gastrectomy
Authors: Widjaja Jason , Wang Rui , Dong Wenpei , Yang Dongchao , Song Zhicheng , Gu Yan , Yang Jianjun
Published: December 2022

Background: Studies have suggested that elevated postoperative heart rate was associated with bleeding following bariatric surgery. Therefore, we questioned whether patients with preoperative elevated heart rate are more prone to postoperative bleeding following sleeve gastrectomy (SG) than those with normal heart rate.
Methods: Patients who underwent laparoscopic SG between January 2020 and January 2022 at our hospital were included. The primary parameters for this analysis were the patients’ age, gender, weight, body mass index (BMI), preoperative and postoperative day-1 heart rate and blood pressure, drainage placement and volume, incidence of postoperative complications.
Results: Two hundred and fifty-two SG patients were included in this study (elevated heart rate, EHR n=54 vs. normal heart rate, NHR n=198). Postoperatively, the EHR group had significantly higher heart rate, incidence of drainage placement, and postoperative length of stay than the NHR groups(p<0.05). We further analyzed the hypertensive patients (HT) with and without preoperative elevated heart rate (HT with EHR, n=30 vs. HT without EHR, n=60). Postoperatively, the HT with EHR group had significantly higher heart rate and incidence of drainage placement than the HT without EHR group (p<0.05). No incidence of postoperative bleeding was observed in all the groups.
Conclusion: Our study found that patients with preoperative elevated heart rate have increased risk for the need of drainage placement intraoperatively, however, did not result in the increased incidence for postoperative complications. Further studies will be needed to understand better the safety of performing bariatric surgery in patients with elevated heart rate.