bluuebunny/crossref_metadata_2025 huggingface dataset:
Upah minimum regional: Sebuah tinjauan
Authors: Feriyanto Nur
Published: April 2022

Recently, Indonesian government released new regulations about RegionalMinimum Wages (UMR). The determination of the wages is a very complex thing, because it involves various interest groups that sometimes being exact opposite each other. The industrialists try to make the wages as low as posible, exactly the opposite of what labor's hope for. It is. unfortunately, simply because the wages are regarded negatively as an influential factor to the Industrial competitiveness in the global economy. This article discusses about the regulations. It concludes that it is necessary to be carefuland transparent in raising the UMR in order to balancing demand and supply of the labor force, so it will not shift the work intensive industry to capital intensive industry. It is also important to be careful in simplemeeting the regulations, especially to the small and medium industry. At this context, this article argues that it is necessary to create a man power act that can protect the labor. It also argues that SPSI (an Indonesian Labor Union)should be more aggresive to rise the bargaining power of the labor.
Depresiasi Rupiah, hutang luar negeri dan beban APBN
Authors: Uphadi A D
Published: April 2022

There is correlation between depreciation of rupiah-debt foreign and load debt foreign on APBN. They can be analyzed with monetary approach. Monetary management isbeing tested, how it can manage the declining of monetary condition. We hope that our economy mil be fine fyrmulated. In this context debt analysis can becontinued by combining many approaches.
Analisis perkembangan industri kecil berdasarkan penyusunan indeks produktivitas dan tingkat efisiensinya di Daerah Istimewa Yogyakarta
Authors: Hidayat Anas
Published: April 2022

Pada pembangunan jangka panjang 25 tahun pertama sektor industri mengalami transformasi struktural yang sangat berarti. Jika pada tahun 1969 kontribuso sektor industri pada Produk Domestik Bruto (PDB) sebesar 9,2% menjadi 21,3% pada tahun 1991, sedangkan sektor pertanian, pada periode yang sama, kontribusinya pada PDB dari 49,3% turun menjadi 19,5%.
Negara industri baru di Asia Tenggara: Analisis kasus Singapore
Authors: Alwi Syafaruddin
Published: April 2022

Dari beberapa negara di kawasan Asia Tenggara terutama yang tergabung di dalam ASEAN, Singapore merupakan satu-satunya negara yang saat ini telah digolongkan sebagai Negara Industri Baru, melalui strategi yang dijalankannya yaitu strategi Industrialisasi yang berorientasi ekspor.
Permintaan tenaga kerja dalam suatu industri: Analisa teori ekonomi
Authors: Subowo Subowo
Published: April 2022

Jumlah penduduk yang besar dikaitkan dengan pembangunan mempunyai dua implikasi. Pertama sebagai modal dalam proses pembangunan karena penduduk sebagai sumber daya manusia (human resources)  mencerminkan potensi yang dapat diarahkan untuk mengolah sumber-sumber alam yang tersedia untuk kesejahteraan seluruh masyarakat.
Metodologi Ekonomi Islam
Authors: Raharjo M. Dawam
Published: April 2022

Studies and research about Islamic economics have been growing quiet fast recently. The problem is that there are not enough literature, data and fund to support the studies. Therefore, it seems to be positive that we found an Association of Islamic economics observer to support communication between observers in developing Islamic economics and local economic.
Stabilisasi inflasi melalui pengelolaan nilai tukar: Studi literatur tentang pengalaman reformasi ekonomi Argentina
Authors: Krismatono Dadi
Published: April 2022

This plain paperwork was intended to describe the experience of Argentina which had held its economic reform during 1991-1994. In April 1991 Argentina embarked on a far-reaching program of economic reform designed to bring inflation down to acceptable basis.
Krisis hutang: Pelajaran dari tahun 1980an untuk 1990an
Authors: Kaminsky Graciela L. , Pereira Alfredo
Published: April 2022

One of the salient characteristics of the 1980s is the growth collapse of the Latin American debtor countries. The debt-overhang literature claims that the debt crisis in the main reason for the growth collapse.
Permasalahan kredit dalam kerangka pembiayaan pembangunan nasional
Authors: Djiwandono J. Soedrajad
Published: April 2022

Sejak bulan April yang lalu kita mulai melaksanakan Pelita VI yang merupakan awal dari periode Pembangunan jangka Panjang 25 Tahun Kedua. Dalam PJPT II ini kita memasuki proses tinggal landas, yang merupakan percepatan tempo pembangunan yang berkesinambungan dengan makin mengandalkan pada kekuatan sendiri.
Analisis laporan keuangan untuk mengukur prestasi dan perkembangan koperasi
Authors: Albari Albari
Published: April 2022

Dalam tata kehidupan perekonomian bahwa koperasi merupakan bangun ekonomi yang sesuai dengan alam Indonesia, karena sifatnya yang dapat meningkatkan usaha dan kesejahteraan anggota dan masyarakat umumnya.
Sistem dan politik ekonomi berjiwa kenyataan
Authors: Mubyarto Mubyarto
Published: April 2022

The one of basic weakness of Indonesia economy is its tendency to the haves and strong group more than the poor. This tendency that has deteriorated this current economic crisis occurs because of capital system implemented by Indonesia. So, Indonesia has to develop a people centered economy, both on its system and politics. This paper discusses the people centered economy in relation with some actual economic issues, ie : democracy of economic corruption - collusion - nepotism (KKN), free trade, formal sector, regional autonomy, and poverty.
Globalisasi, liberalisasi, dan daya saing sektor pertanian
Authors: Hadiwigeno Soetatwo
Published: April 2022

As we know that the globalization and liberalization process have impact in many aspects, economic, and social problems. Indonesia as a developing country will get because of its low competitiveness. The government must develop an appropriate policy to solve this problem.
Penduduk dan pertumbuhan ekonomi di Indonesia: Analisis kausalitas
Authors: Widarjono Agus
Published: April 2022

Impact of population on economic growth had been questioned a long time ago, Classical economist, Adam Smith, emphasizes that high rate of population growth would support economic growth through specialization and division of labor. In other hand, Thomas R. Mathus, another classical economist, emphasizes the negatives effect of population investment rate and in turn results in a lower of economic growth.
Migrant workers in a corner of the growth triangle
Authors: Partadireja Ace
Published: April 2022

Twenty kilometers southest of Singapore or about 25 minutes by ferry, there is an Indonesian Island, Batam. This 415 sq km island, with reddish yellow podzolic soil, is agriculturally good for nothing but tropical schrubs, snakes and monkeys, and some would add, is financcially a loss to the Indonesian government.
Spiritualitas zakat dan keadilan pembangunan
Authors: Baswir Revrisond
Published: April 2022

Keadilan menempati kedudukan yang sangat tinggi dalam Islam. Ia tidak hanya merupakan salah satu dari sifat Allah, bukan sekedar dasar dari masyarakat Islam sejati, dan bukan pula sekedar unsur yang terdapat dalam beratus-ratus hukum Islam.
Perilaku suami isteri dalam pengambilan keputusan membeli barang dan jasa di Kotamadya Yogyakarta
Authors: Astoeti Boedi
Published: April 2022

Salah satu faktor sosioekonomi yang mempunyai pengaruh kuat pada pilihan konsumen adalah status bekerja anggota keluarga. Perubahan status bekerja secara langsung mempengaruhi daya beli termasuk dalam hal ini adalah adanya kenaikan jumlah pekerja wanita.
Kandungan impor dan daya saing internasional barang-barang berteknologi tinggi
Authors: Misanam Munrokhim
Published: April 2022

One important factor determining international trade is technology content of each product. The goal of this research is to examine whether Indonesia has ability to export product having high technology content.
Ketidakadilan vertikal dalam peneteapan pajak bumi dan bangunan: Kasus Yogyakarta
Authors: Jaya Samon
Published: April 2022

The problem faced by the government to impose property tax is the market value of the property (NJOB). This leads unfair assessment. Generally, NJOP tends to be a regressive vertical unfair.
Pembangunan agroindustri dalam menggerakkan perekonomian
Authors: Priyadi Unggul
Published: April 2022

Economics crisis striking Indonesia nowadays should be treated seriously. Trying to recover the Indonesian economy, government has no choice other than strengthening the fundamental of the Indonesian economy.
Peranan investasi asing langsung terhadap pertumbuhan ekonomi di negara-negara Asia Timur
Authors: Suryawati Suryawati
Published: April 2022

In many developing countries, Foreign Direct Investment (FDI) is expected to accelerate economic  development. For that reason, both host country and home country try to simulate the flow of FDI. The purpose of this article is to examine whether FDI affects to economic growth in east Asian or not.
Kajian tentang keberhasilan kebijakan kemitraan usaha besar menengah kecil (Pengembangan metodologi evaluasi kebijakan dan penerapannya pada program tebu rakyat Indonesia)
Authors: Hadipuro Wijanto
Published: April 2022

There are nine forms of regulation used by Indonesian government to induce the cooperation between large and medium with small enterprises. Content analysis on the regulations shows that each regulation has its own objectves without any goals to specify the objectives, that makes it difficult to evaluate the success of each program.
Pengaruh deregulasi moneter terhadap likuiditas perekonomian Indonesia: Studi empiris model koreksi kesalahan
Authors: Saleh Samsubar , Hidayat Samsul
Published: April 2022

Since monetary deregulation in decade 1980, financial and monetary sector in Indonesia change. The monetary deregulation package affects much to liquidity. This paper evaluates the impact of monetary deregulation to broad money (M2) by using Error Correlation Model (ECM).
Apakah ketimpangan menyebabkan inflasi? Tinjauan ekonomi politik inflasi, perpajakan dan utang pemerintah
Authors: Beetsma Roel M. W. J. , Frederick Frederick
Published: April 2022

A democratic society in which the distribution of wealth is unequal elects political parties that are likely to represent the interest of poor people. It is in the interest of clientele of the resulting governments to attempt to levy inflation taxes in order to erode the real value of debt service and redistributive from the rich to poor.
Utang luar negeri Indonesia: Implikasi dan manfaat dalam pembangunan nasional
Authors: Sagir H. Soeharsono
Published: April 2022

Pendanaan pembangunan nasional dalam PJPT I (1969/70-1993/94) dalam APBN menunjukkan, bahwa negara kita belum berhasil menggali sumber dana pembangunan dari dalam negeri (tabungan pemerintah), terjadi peningkatan ketergantungan sumber dana pembangunan dari utang luar negeri dalam Pelita IV serta secara mencolok; sebagai dampak kemerosotan harga minya bumi, sedang di lain pihak penerimaan nonmigas (Pajak) belum dapat menjadi andalan.
Desentralisasi fiskal sebagai alternatif menggali sumber dana pembangunan dan mewujudkan otonomi daerah
Authors: Kuncoro Mudrajad
Published: April 2022

Tanggal 25 April 1995, sejarah mencatat dimulainya pencanangan proyek uji coba otonomi daerah oleh Presiden Soeharto dengan nama program pemantapan Daerah Percontohan Otonomi untuk 26 Dati II.
Yendaka, dan Pengaruhnya terhadap perekonomian Indonesia
Authors: Khasanah Mufidhatul
Published: April 2022

Meningkatnya nilai tukar mata uang Jepang (yen) terhadap mata uang dollar Amerika (US.$) atau lebih dikenal dengan yendaka akhir-akhir ini banyak mengundang komentar dari banyak pihak, baik dari kalangan akademis, swasta, maupun pemerintah.
Konsentrasi kekuatan ekonomi konglomerat Indonesia dan urgensi pengaturan hukum anti-monopoli
Authors: Khairandy Ridwan
Published: April 2022

Gagasan akan perlunya Indonesia segera memiliki Undang-undang (UU) Anti Monopoli atau UU Anti Trust telah lama diperbincangkan berbagai kalangan baik kalangan ekonom maupun ahli hukum, dan diharapkan pemerintah segera merealisir gagasan tersebut. Akan tetapi hinga kini harapan tersebut belum menjadi kenyataan.
Foreign exchange risk management case study: RJR NABISCO
Authors: Primanita Primanita
Published: April 2022

This article presents a case analysis of RJR Nabisco Holdings Corporation's foreign exchange management. The strategy pursued by RJR Nabisco, the two headed-hedging strategy succeded in lowering it's foreign exchange risk.
Analisis penentuan kurs valuta asing di Indonesia
Authors: Wuri Josephine
Published: April 2022

This research is intended to analyze the effect of money supply, real income and interest rate in Indonesia and in the United States on the determination of the exchange rate. In addition, this study also wishes to determine appropriate model of exchange rate in Indonesia.
Analisis makro kinerja pasar modal Indonesia dengan pendekatan Error Correction Model (ECM)
Authors: Astuti Rini Dwi
Published: April 2022

In Indonesia, monetary crisis had brought economy damage, particularly at the capital market. This study, concerns with analysis of capital market conducted in macro economy perspective and using Error Correction Model (ECM) Approach. How did foreign exchange fluctuation, deposit at banking sector, real deposit rate, LIBOR, and monetary crisis since August 1997, influence on the capital market performance?
Perkembangan pemikiran ekonomi dan munculnya pandangan strukturalis
Authors: Hamid Edy Suandi
Published: April 2022

In the social sciences, economics is considered as the most progressive and dynamic science. Economics has a complete analysis tool, which combines both qualitative and quantitative approaches. In its process, the dynamics of economics is indicated by the emerge of new view with different approaches.
Pemikiran pendekatan pembangunan di awal millenium: Penekanan pada kualitas pertumbuhan
Authors: Handoko Budiono Sri
Published: April 2022

Due to the economic achievement in the past 25 years, Indonesia has become one of the East Asian Miracle countries. However, this is not really true since there is an economic crisis as well as the distraction of economic fundamentals. Therefore, the new policy of economic strategy particularly by involving non economic variables can help Indonesia to solve the economi problem particularly to increase the economic growth.
Review on government policies and the economic crisis in Indonesia
Authors: Karseno Arief Ramelan
Published: April 2022

Tulisan ini berisi review kebijakan ekonomi pemerintah serta observasi masalah implementasi dan institusional yang muncul dari kebijakan tersebut yang diduga merupakan salah satu penyebab utama krisis ekonomi yang bersumber dari kesalahan manajemen kebujakan ekonomi makro.
Retrospeksi kebijakan pangan dan implikasinya terhadap upaya memenuhi pola pangan harapan
Authors: Priyadi Unggul
Published: April 2022

The food policy applied by government is focused on the increase of rice. One achievement of the policy establishment is the rice swasembada in 1984. However, after that rice production decrease while other food commodities do not have enough support from government.
Struktur dan kinerja industri Indonesia setelah 50 tahun merdeka: Adakah peluang kecil?
Authors: Kuncoro Mudrajad
Published: April 2022

Sejak tahun 1996, pemerintah orde baru telah membangun suatu pemerintahan nasional yang kuat menempatkan stabilitas politik sebagai landasan untuk mempercepat pembangunan ekonomi Indonesia. Politik sebagai panglima telah diganti dengan ekonomi sebagai panglima, dan mobilisasi massa atas dasar partai secara perlahan digeser oleh birokrasi dan politik teknokratis.
Perkembangan teori ekonomi mikro
Authors: Afandi Akhsyim
Published: April 2022

Perkembangan paling mutakhir menunjukkan bangkitnya kembali ekonomi makro Keynesian yang menjelma menjadi New Keynesian Economics dengan implikasi kebijaksanaan yang sama. Kebangkitan ini tercermin pada cukup banyaknya artikel di jurnal dan cepat populernya buku teks makro yang ditulis dengan kerangka New Keynesian Economics.
Kinerja koperasi unit desa (KUD) dan manfaat KUD bagi masyarakat di Kabupaten Bantul
Authors: Badrudin Rudy
Published: April 2022

Di dalam GBHN dalam pola umum pembangunan jangka panjang disebutkan bahwa dalam melaksanakan pembangunan nasional, segenap kemampuan modal dan potensi dalam negeri harus dimanfaatkan dengan disertai kebijakan serta langkah-langkah untuk membantu, membimbing pertumbuhan, dan meningkatkan kemampuan yang lebih besar bagi golongan ekonomi lemah.
Perdagangan Indonesia menghadapi era informasi
Authors: Dewanta Awan Setya
Published: April 2022

Perkembangan yang pesat dalam ilmu pengetahuan dan teknologi telah merubah sendi-sendi kehidupan antar bangsa. Perkembangan teknologi komunikasi yang telah meningkatkan arus informasi, juga memberikan dampak kepada peningkatan mobilitas kapital. Penguasaan terhadap informasi tersebut menjadikan kemampuan kapital berlipat ganda.
Ketidakstabilan ekspor dan ekonomi Indonesia
Authors: Widarjono Agus
Published: April 2022

Perekonomian Indonesia adalah perekonomian yang menganut sistem ekonomi terbuka. Di dalam sistem ini lalu lintas ekonomi internasional mengambil peranan yang penting di dalam perekonomian dan pembangunan suatu negara. Pentingnya lalu lintas ekonomi internasional bagi Indonesia dapat dilihat dari rasio perdagangan luar negeri terhadap Produk Domestik Bruto (PDB).
Pengendalian kualitas produk kerajinan bambu di Kabupaten Sleman
Authors: Sumadi Sumadi
Published: April 2022

Perkembangan dunia usaha dewasa ini dirasakan semakin pesat. Hal ini ditunjukkan dengan semakin melimpahnya produk-produk yang ditawarkan oleh produsen kepada konsumen di pasar, dengan berbagai tingkat harga dan variasi bentuk dan disain.
Foreign direct investment, efficiency, and total factor productivity: Does technology intensity classification matter?
Authors: Yasin Mohammad Zeqi , Sari Dyah Wulan
Published: April 2022

Purpose ― We examine whether the foreign direct investment (FDI) in promoting technical efficiency is controlled by the sector classifications based on the technology intensity (High Technology, Medium-High Technology, Medium-Low Technology, and Low Technology).
Methods ― We use the Indonesian firm-level dataset of the large and medium manufacturing survey from 2007 to 2015 and employ the time-varying stochastic production frontier.
Findings ― We reveal that FDI, technology intensity and absorptive Capacity significantly affect firms' production and efficiency. We also found that the Indonesian manufacturing industry from 2007 to 2015 experienced positive Total Factor Productivity growth, where High-Technology sectors experienced the largest magnitude among others. Meanwhile, technological progress stemming from FDI is enjoyed more by Low Technology sectors. Meaning to say, technology intensity classification does not matter to technological progress.
Implication ― The host country's government should focus on industries with high technical capabilities to accelerate FDI gains for the firms. Simultaneously, human capital improvement also needs to be intensified, for instance, through training or human development, so that firms with lower technical capability can catch up and, consequently, receive similar benefits from FDI activities.
Originality ― Our study accommodates the research gap by including the FDI effect in both productivity and efficiency in a single equation. Many studies merely categorize technology intensity following the stochastic production frontier estimation to obtain technical efficiency or TFP growth. In this sense, those studies did not control the impact of the technology-specific effect.
Rigpa and Shekhinah – The Convergence of Mystical Experiences
Authors: Bretan Andrei
Published: April 2022

AbstractEliadean analysis reveals the passive or the receiving aspect of the symbol of the presence of God, the Aron ha-Berit or the Ark of the Covenant of the ancient Hebrews. Consequently, we are able to establish the inner mode or the symbolic structure of Yahweh. The Sefirotic Tree of medieval Kabbalists replicates the symbolic structure of Yahweh as revealed by the Ark of the Covenant. The feminine aspect of the presence of God remains in the consciousness of the Jewish people and blossoms in the medieval Kabbalah. It is precisely the feminine aspect that is capable of transcendence or able to acquire an infinite character.The dynamic aspect of the Shekhinah is reflective of the changes it undergoes as a result of receiving the flow from the Sefiroth above. Looking at the Sefirotic Tree as a reflection of the mind of the Kabbalist, Shekhinah represents the human ability for acceptance. A narrow acceptance corresponds to a narrow mind, whereas the infinite ability to accept corresponds to the infinite mind. A particular description of the formative function of Shekhinah represents a different mode of cognition. Similar descriptions are found in the Tibetan Buddhist tradition related to the concept of Rigpa. In order to find out the equivalence of these descriptions we analyzed the latter and found that Shekhinah and Rigpa converge at both the foundational and transcendental levels.
Improving Data Surveillance Resilience Beyond COVID-19: Experiences of Primary heAlth Care quAlity Cohort In ChinA (ACACIA) Using Unannounced Standardized Patients
Authors: Xu Dong (Roman) , Cai Yiyuan , Wang Xiaohui , Chen Yaolong , Gong Wenjie , Liao Jing , Zhou Jifang , Zhou Zhongliang , Zhang Nan , Tang Chengxiang , Mi Baibing , Lu Yun , Wang Ruixin , Zhao Qing , He Wenjun , Liang Huijuan , Li Jinghua , Pan Jay
Published: April 2022

We analyzed COVID-19 influences on the design, implementation, and validity of assessing the quality of primary health care using unannounced standardized patients (USPs) in China. Because of the pandemic, we crowdsourced our funding, removed tuberculosis from the USP case roster, adjusted common cold and asthma cases, used hybrid online–offline training for USPs, shared USPs across provinces, and strengthened ethical considerations.

With those changes, we were able to conduct fieldwork despite frequent COVID-19 interruptions. Furthermore, the USP assessment tool maintained high validity in the quality checklist (criteria), USP role fidelity, checklist completion, and physician detection of USPs. Our experiences suggest that the pandemic created not only barriers but also opportunities to innovate ways to build a resilient data collection system.

To build data system reliance, we recommend harnessing the power of technology for a hybrid model of remote and in-person work, learning from the sharing economy to pool strengths and optimize resources, and dedicating individual and group leadership to problem-solving and results. (Am J Public Health. 2022;112(6):913–922. https://doi.org/10.2105/AJPH.2022.306779 )
A Mathematical Model of Desiccant Wheel in Desiccant Cooling
Authors: Rachman Arfidian
Published: April 2022

The desiccant wheel performance of desiccant cooling system components is very important whose function is to regulate air humidity levels as well as to the capability, size and cost of the entire system. Mathematical models for predicting the performance of desiccant wheels in the development of mathematical models is one of the effective methods for analyzing the performance of wheel this moisture-reducing. This mathematical model can also be used in guiding system operation, delivering experimental results and automation in designing this cooling system. The purpose of this paper is to provide an overview of efforts to mathematically model the process of heat transfer and mass transfer that occurs in the moisture-reducing wheel. The desiccant wheel model built here is a gas and solid system including basic principles, heat and mass transfer mechanism and model building. The model is based on ideal assumptions, equations, additional conditions and the method of solution and also the main results. The gas-solid model is a more precise and more complex model than the other models. From these results the evolutionary process of the mathematical model is obtained and the aspects of calculation of pressure loss, air leakage, and optimal rotation speed of the drying wheel / dehumification.
The Effect of Volume Fraction on Acoustic Properties of Areca Nut Midrib Fibers Composites with Natural Adhesives
Authors: Pratiwi Putri , Fahmi Hendriwan , Yanto Asmara , Fitra Soni Idel
Published: April 2022

Areca nut Midrib is one of agricultural waste that has many benefits to be recycled for household purposes such as plates, jars and others. Moreover, for many researchers, areca nut midrib fiber was used as a filler of composites material. From several studies it is known that this material has good potential as filler in composites because of its good mechanical properties. In addition, this material is also considered as a good sound absorber. Therefore, this research will investigate the ability of sound absorption from this material in a various composition. We used Areca nut Midrib fibers as a filler and pine sap as a matrixof composite with a volume fraction of 70%: 30%, 75%: 25%, 80%: 20%, 85%: 15%, 90%: 10%.  The sound absorption coefficient of composites was studied using impedance tube method with 500, 1000 Hz, 1500 Hz, 2000 Hz, and 2500 Hz frequency. The results showed that at a test frequency of 500 Hz, the value of sound absorption coefficient increases with the increase of Areca nut Midrib fraction. This research shown that there is an effect of volume fraction on the acoustic properties  and Areca nut Midrib fiber composite have potential used as sound absorption materials, based on ISO standard 11654:1997.
The Effect of Misalignment to Vibration, Electric Current and Shaft Rotation Speed on The Coupling Transmision
Authors: Romiyadi Romiyadi , Irwan Purnama
Published: April 2022

Coupling is one of the components are widely used in various industries. Coupling is widely used as a power transfer transmission. Coupling have a long life time, it mean coupling was damage if out of the maintenance. The one factor is misalignment. This study aim to determine the effect of misalignment on the coupling transmission to vibration, electric current and shaft rotation speed. In this study, was done alignment process with variations of misalignment on the coupling transmission and was done measurement value of vibration,  electric current and  shaft rotation speed. The study results show that the changed of misalignment would give a positive impact to vibration and electric current. For the effect misalignment to shaft rotation speed, the study results show that the changed of misalignment would give a negative impact to shaft rotation speed.
Analysis of Titanium Grade 2 Surface Roughness on Turning Process
Authors: Harijono Agus , Mufarrih AM , Qosim Nanang
Published: April 2022

Titanium Grade 2 is a type of material that is often used in industry, especially in materials for biomedical implants. Titanium Grade 2 has a good stiffness to weight ratio, is corrosion resistant and has good biocompatibility in the body. However, it has a low thermal conductivity, so it is necessary to choose the right machining parameter to produce a good surface roughness value. This study aims to determine the characteristics of Titanium Grade 2, namely the surface roughness of the results of lathe machining. The research design used the Taguchi L9 method, with 2 factors and 3 levels. The machining parameters used are spindle rotation 500; 700; 900 rpm and feed speed 25; 50; 75mm/min. The response variable studied was surface roughness. The milling process is carried out using a Maximat V13 lathe. Surface roughness was measured using a Mitutoyo surface roughess tester. Data analysis used ANOVA analysis. The results showed that there was an effect of variations in machining parameters on the surface roughness response. The spindle rotation variable has a p-value of 0.039 and the feeding motion variable has a p-value of 0.025. This shows that the two independent variables have a significant effect on the surface roughness response. The lowest surface roughness can be achieved by setting the spindle rotation at 700 rpm and the feed speed at 25 mm/min.
Design of a Hydraulic Plate Bending Machine
Authors: Eka Putra Ismet , Ahsanul K Khalid
Published: April 2022

This study aims to analyze the design and specifications of a plate bending machine using hydraulic power based on the bending force of the selected plate dimensions. The method used in this research is to use a computational method known as Finite Element Analysis (FEA) with the help of the Stress Analysis feature of the Autodesk Inventor 2019 Software. The dimensions of the machine frame are 1600 mm in length, 600 mm in width and 1200 mm in height. Based on the bending force on the mild steel plate with a length of 500 mm and a thickness of 2 mm, namely 5750 N, the hydraulic system planning is a hydraulic power of 0.24 kw, a pump capacity of 6,475 cc / rev and the pressure received by the cylinder is 18,488 bar. Based on the load that occurs when the bending process occurs, both in the form of bending forces, loads from bender, clamp and loads from hydraulic. The results show that the bending of the court with a length of 500 mm and a thickness of 2 mm, the machine has a safety factor value of 1.323.
Effect of Electrode Product Merk with AWS E6013 JIS 4313 Specification on Low Carbon Steel in Weld Metal Area
Authors: Hafni Hafni
Published: April 2022

In this study, the material used is low carbon steel with a tensile stress of 37kg/mm2, using electrodes with specifications AWS E 6013 JIS E 4313 with a diameter of 2.6 mm, which has a tensile stress of 60,000 psi or 43 kg/mm2. In the selection of specifications, what attracts attention is the price of these electrodes varies greatly with very different price differences. There is an assumption that cheap electrodes are of poorer quality than expensive ones. In this study, 3 different brands of electrode products were used with the AWS E 6013 JIS 4313 electrode specifications. SMAW welding process on low-voltage carbon steel material test material 37 kg/mm2 thickness 10, length 150 mm width 100 mm, using electrodes with AWS E 6013 JIS 4313 diameter 3.2 mm, electrode temperature 150 0F (65.5 0C), Welding position 1 G, groove connection type V, welding machine DC polarity DCRP current, voltage 23 volts, current 75 A on layer 1, 90 A on layer 2 and 85 A on layer 3, welding speed 32 cm/minute From the results of metallography testing in the weld metal area, it shows that the 3 brands of electrode products show the same composition of the market, namely ferrite pearlite with a ferrite matrix. From this it can be concluded that the price of the electrode product with specifications aws 6013 JIS 4313, does not affect the welding results.
Experimental Investigation on Performance ByPass Cycle Multi-Split Cooling System-VRF
Authors: Rachman Arfidian , Handra Nofriady , Nesti Lisa
Published: April 2022

Variable refrigerant flow air-conditioning (VRF) systems are important and widely used building energy systems around the world. In this study, the performance of a multi-split VRF system using the bypass cycle is evaluated using the experiment as a possible sub-cooling method to prevent flash gas generation in liquid pipelines. The experimental for the multi-split VRF system is developed by considering the applications of the bypass cycle, and is validated with experimental data. The results of the tests that have been carried out are obtained in the vapor compression cycle with a bypass cycle, an increase in cooling capacity of 2.96% and an energy saving ratio (EER) of 1.72%. The input power of the bypass cycle is reduced by up to 2.45% when the performance of the multi-split VRF systems with bypass cycle cooling capacity conditions.
Multilevel Percutaneous Fenestrated Screw Fixation with Bone Cement Augmentation in Adult Lumbar Spinal Deformity
Authors: Choi Soo Young , Yoo Byung Rhae , Son Seong , Ahn Yong , Kim Woo Kyung , Lee Sang Gu
Published: April 2022

Objective: Fenestrated screw fixation with bone cement augmentation has been demonstrated to increase the pullout strength. Bone cement augmentation is performed to prevent screw failure. Although bone cement screw fixation and fenestrated screw fixation have been compared in many studies, there has been no study on the clinical effects and complication in long level percutaneous bone cement screw fixation. The study aimed to investigate the safety and efficacy of multilevel percutaneous fenestrated screw fixation with bone cement augmentation in the adult lumbar spinal deformity.Methods: We performed a retrospective study of 15 patients who underwent multilevel percutaneous fenestrated screw fixation (PFSF) with bone cement augmentation in a single spine surgeon between January 2018 and December 2020. The incidence of screw failure, body mass index (BMI), bone mineral density (BMD), past history, Visual analogue scale (VAS) score, Oswestry disability index (ODI), sagittal vertical axis (SVA), pelvic Tilt (PT), pelvic incidence (PI), sagittal slope (SS), lumbar lordosis (LL) and Cobbs angle were investigated in the patients.Results: All patients underwent percutaneous screw fixation using a bone cement additive. Mean BMD was –2.0±0.8. The mean percutaneous fenestrated screw fixation level was 6. The mean VAS score changed from 7.14 preoperatively to 4.57 postoperatively (1 month after the surgery), to 3.71 at the last follow-up. The mean ODI changed from 45.21 preoperatively to 32.5 postoperatively, to 27.0 at the last follow-up. The mean LL changed from 23.6 preoperatively to 32.96 postoperatively, to 31.67 at the last follow-up. The mean PT changed from 32.67 preoperatively to 28.11 postoperatively, to 28.70 at the last follow-up. The mean PI - LL changed from 35.20 preoperatively to 22.56 postoperatively, to 22.76 at the last follow-up. The mean Cobb’s angle decreased from 18.30 preoperatively to 6.27 postoperatively, to 5.98 at the last follow-up. The mean SVA changed from 76.65 preoperatively to 46.15 postoperatively, to 48.46 at the last follow-up. The bony fusion rate was 73.3%. There were screw loosening in 4 patients, rod fracture in 1 patient and screw fracture in 3 patients. Among the 3 patients with screw fracture, 1 patient required reoperation. Cement leakage occurred towards the anterior body of the vertebrae in 2 patients but no symptoms were observed.Conclusion: Although the current study examined a small sample with relatively short term follow up periods, our study results demonstrate that multilevel PFSF with bone cement augmentation can result in good clinical and radiological outcomes for lumbar spinal deformity. However, larger size screws or smaller through-hole screws are required to prevent screw fracture.
Some Complex Pythagorean Fuzzy Einstein Geometric Aggregation Operators and their Application in Decision-Making Process
Authors: Rahman Khaista
Published: April 2022

The goal of this research is to introduce some Einstein aggregation operators for aggregating the different complex Pythagorean fuzzy sets (CPFSs) by considering the dependency between the pairs of its membership degrees. In the existing studies of fuzzy and its extensions, the uncertainties present in the data are handled with the help of degrees of membership that are the subset of real numbers, which may also loss some valuable data and hence consequently affect the decision results. A modification to these, complex Pythagorean fuzzy set handles the uncertainties with the degree whose ranges are extended from real subset to the complex subset with unit disc and hence handle the two dimensional information in a single set. Thus, motivated by this and this paper we present some novel Einstein aggregation operators, namely complex Pythagorean fuzzy Einstein weighted geometric (CPFEWG) aggregation operator, complex Pythagorean fuzzy Einstein ordered weighted geometric (CPFEOWG) aggregation operator, complex Pythagorean fuzzy Einstein hybrid geometric (CPFEHG) aggregation operator, induced complex Pythagorean fuzzy Einstein ordered weighted geometric (I-CPFEOWG) aggregation operator, and induced complex Pythagorean fuzzy Einstein hybrid geometric (I-CPFEHG) aggregation operator. Also develop some of their desirable properties. Furthermore, based on these proposed aggregation operators a multi-attribute group decision making problems developed under complex Pythagorean fuzzy set environment. An illustrative example related to the selection of the best alternative is considered to show the effectiveness, importance and efficiency of the new developed approach.
Identification of stressors and quantification of stress among veterinary students in India using a cross- sectional questionnaire survey
Authors: Grakh Kushal , Jadhav Vijay Jayawant , Panwar Diksha , Khurana Rajesh , Bangar Yogesh Chanderkant , Pandita Sakshi , Yadav Dheeraj
Published: April 2022

Veterinary education, being a rigorous professional training programme, exposes students to significant academic and non-academic pressures. Identifying the stressors and evaluating stress levels among veterinary students can help with the development of coping techniques to protect students' mental health. A 44-item based cross-sectional questionnaire survey was prepared and disseminated among veterinary students in India with the goal of identifying the stressors responsible, measuring the amount of stress, and relating stress to characteristics like as gender and family income. The data from the questionnaire was evaluated using a variety of statistical factors. The survey had a high level of internal consistency. More than 95% of pupils were found to be stressed, with levels ranging from moderate to severe. Academic stressors were the primary cause of increased overall stress. In comparison to male students, female students reported higher levels of overall stress, academic stress, and intrapersonal and interpersonal stress. Students from lower-income families experienced increased overall stress as well as stress connected to family expectations. Gender, family income, academic stressors, intrapersonal, interpersonal, and career-related stressors, and social activities-related stressors all positively predicted overall stress among students. These factors should be given special consideration when developing any stress-reduction or stress-reduction strategies for Indian veterinary students. To the best of our knowledge, this is the first study in India to identify stressors and quantify stress among veterinary students.
Equilibrium selection via current sheet relaxation and guide field amplification
Authors: Yoon Young Dae , Wendel Deirdre , Yun Gunsu
Published: April 2022

Although there is a continuous spectrum of current sheet equilibria, how a particular equilibrium is selected by a given system remains a mystery. Yet, only a limited number of equilibrium solutions are used for analyses of magnetized plasma phenomena. Here we present the exact process of equilibrium selection, by analyzing the relaxation process of a disequilibrated current sheet under a finite guide field. It is shown via phase-space analyses and particle-in-cell simulations that the current sheet relaxes in such a way that the guide field is locally amplified, yielding a mixed equilibrium from the spectrum. The universality of such equilibria is delineated by comparing the simulated current sheet to that observed in space.
Predictive gamma passing rate of 3D detector array-based volumetric modulated arc therapy quality assurance for prostate cancer via deep learning
Authors: Matsuura Takaaki , Kawahara Daisuke , Saito Akito , Miura Hideharu , Yamada Kiyoshi , Ozawa Shuichi , Nagata Yasushi
Published: April 2022

Purpose
To predict the gamma passing rate (GPR) of the three-dimensional (3D) detector array-based volumetric modulated arc therapy (VMAT) quality assurance (QA) for prostate cancer using a convolutional neural network (CNN) with the 3D dose distribution.
Methods
One hundred thirty-five VMAT plans for prostate cancer were selected: 110 plans were used for training and validation, and 25 plans were used for testing. Verification plans were measured using a helical 3D diode array (ArcCHECK). The dose distribution on the detector element plane of these verification plans was used as input data for the CNN model. The measured GPR (mGPR) values were used as the training data. The CNN model comprises eighteen layers and predicted GPR (pGPR) values. The mGPR and pGPR values were compared, and a cumulative frequency histogram of the prediction error was created to clarify the prediction error tendency.
Results
The correlation coefficients of pGPR and mGPR were 0.67, 0.69, 0.66, and 0.73 for 3%/3-mm, 3%/2-mm, 2%/3-mm, and 2%/2-mm tolerances, respectively. The respective mean\(\pm\)standard deviations of pGPR\(-\)mGPR were \(-\)0.87\(\pm\)2.18%, \(-\)0.65\(\pm\)2.93%, \(-\)0.44\(\pm\)2.53%, and \(-\)0.71\(\pm\)3.33%. The probabilities of underestimate cases (pGPR < mGPR) were 72%, 60%, 68%, and 56% for each tolerance.
Conclusions
We developed a deep learning-based prediction model of the 3D detector array-based VMAT QA for prostate cancer, and evaluated the accuracy and tendency of prediction GPR. This model can provide a proactive estimation for the results of the patient-specific QA before the verification measurement.
Identification and Management of Bile Leak from Subvescical Bile Duct (“Duct of Luschka”) After Laparoscopic Cholecystectomy. A Systematic Review of Literature.
Authors: Mazzotta Erica , Carannante Filippo , Miacci Valentina , Mascianà Gianluca , D'Agostino Fausto , Caricato Marco , Capolupo Gabriella Teresa
Published: April 2022

Background. Bile leak is a rare complication after Laparoscopic Cholecystectomy. Subvesical bile duct (SVBD) injury is the second cause of minor bile leak, following the unsuccessful clipping of the cystic duct stump. The aim of this study is to pool available data on this type of biliary tree anatomical variation to summarize incidence of injury, methods used to diagnose and treat SVBD leaks after LC.Methods English articles published between 1985 and 2021 describing SVBD evidence in patients operated on LC for gallstone disease, were included. Data were divided into two groups based on the intra or post-operative evidence of bile leak from SVBD after surgery.Results This systematic report includes 68 articles for a total of 231 patients. A total of 195 patients with symptomatic postoperative bile leak are included in Group 1, while Group 2 includes 36 patients describing SVBD visualized and managed during LC. Outcomes of interest were diagnosis, clinical presentation, treatment, and outcomes. Conclusion The management of minor bile leak is multidisciplinary. In 86% of cases, Endoscopic Retrograde Cholangio-Pancreatography (ERCP) was the preferred way to visualize and treat this complication. Surgery shouldn’t be considered as a first-line treatment and it is recommended when endoscopic or radiological approaches aren’t resolutive.
A variety of Surface Techniques, Several Denture Base Repair Properties Were Investigated
Authors: Alfahdawi Ibrahim H.
Published: April 2022

Heat-cure acrylic resin is used, and six sets of specimens were cut in guiding mode with a conventional positioning clamp. To evaluate impact strength, silicon sheets with diameters of (50×5×4) mm were created. On an alternative bending fatigue machine, specimens with a diameter of (70× 10 ×2.5) mm were evaluated. The monomer solvent's impact bond strength was found to be higher than that of the thinner solvent and the acetone solvent. Thiner solvents and monomer solvents have a lower fatigue bond strength than acetone.
Enlarged unilateral posterior vertebral column resection for spinal kyphosis accompanied with compressive vertebral fracture: short term clinical outcome with one-year follow-up
Authors: Zhang Wei , Guo Lei , Li Jiaqi , Zhang Fei , Zhang Peng , Sun Yapeng
Published: April 2022

Objective: The aim of this study was to evaluate the clinical outcome of a modified surgical technique, enlarged unilateral posterior vertebral column resection (EU-PVCR), for treatment of spinal kyphosis accompanied with compressive vertebral fracture.Material and Methods: Between January 2015 and December 2020, data of 13 patients who underwent EU-PVCR were retrospectively collected. All patients were followed up for a minimum of 12 months. Clinical outcome was evaluated by kyphotic Cobb’s angle, sagittal vertical axis (SVA), visual analogue scale (VAS) score and Oswestry disability index (ODI). The operation time, blood loss and complications were also recorded.Results: All patients received this operation successfully. The average time of follow up was 12.3±2.1 months. At pre-operation, 1 week post-operation and 12 months post-operation, the Cobb angle were 45.5±6.1, 7.9±1.3, 8.6±1.4 (P<0.05). SVA was 3.2±0.8cm at pre-operation, and changed to 1.9±0.9cm at post-operation, and 2.1±1.1cm at the last follow up. At pre-operation, 1 weeks post-operation and 12 months post-operation, VAS were 6.1±1.3, 2.5±0.5, 1.3±0.5 (P<0.05).ODI was 28.0±2.7 before operation, and improved to 8.9±1.9 at most recent follow-up (P<0.05). No permanent neurological complication was observed during follow up.Conclusion: EU-PVCR technique is an effective surgical method for the treatment of spinal kyphosis accompanied by compressive vertebral fracture in adults, while the long-term clinical outcome remains further investigated.
Sex-Specific Cardiometabolic Risk Markers of Left Ventricular Mass in Physically Active Young Adults: The CHIEF Heart Study
Authors: Lin Gen-Min , Tsai Kun-Zhe , Liu Pang-Yen , Huang Wei-Chun , Lima Joao , Lavie Carl J.
Published: April 2022

Greater physical fitness may lead to greater left ventricular mass (LVM) and reduce the effect of cardiometabolic risk factors on LVM. However, the cardiometabolic biomarkers associations for LVM have not been clarified in physically active young adults. This study included 2,019 men and 253 women, aged 18–43 years, from the military in Taiwan. All participants underwent anthropometric and blood metabolic markers measurements, and completed a 3000-meter run test for assessing fitness. LVM was calculated on the basis of an echocardiography. Multiple linear regression was used to determine the sex-specific associations between cardiometabolic risk markers and LVM indexed for the body height (g/m2.7). In men, age, systolic blood pressure (SBP), 3000-meter running time, serum triglycerides, serum uric acid and waist circumference (WC) were correlated with LVM index (β = 0.073, 0.099, -0.005, 0.005, 0.237 and 0.237, respectively; all p-values < 0.05). The correlations were not significant for fasting glucose, total cholesterol and high-density lipoprotein cholesterol (HDL-C). In women, SBP, HDL-C and WC were correlated with LVM index in the univariate analysis (β = 0.066, -0.050 and 0.318, respectively; all p-values < 0.05), whereas the correlation was merely significant for WC in the multiple linear regression analysis (β = 0.197; p-value < 0.001). In physically active adults, the associations of cardiometabolic risk markers with LVM might vary by sex. Greater physical fitness associated with greater LVM was noted only in men, while greater WC was the only metabolic risk marker for greater LVM in both men and women.