bluuebunny/crossref_metadata_2025_split huggingface dataset:
Seroprevalence of feline foamy virus in domestic cats in Poland
Authors: Materniak-Kornas Magdalena , Frymus Tadeusz , Löchelt Martin , Kuźmak Jacek 
Published: October 2021

Abstract

Introduction
Feline foamy virus (FFVfca) is widespread and its prevalence in naturally infected domestic cats ranges between 30% and 80% worldwide. The infection is persistent, with a sustained antibody response in FFVfca-positive cats; however to date, no defined disease or clinical symptoms have been proved to be associated with it. The goal of the presented study was to determine the prevalence of FFVfca infection in domestic cats in Poland.

Material and Methods
A total of 223 serum samples collected from domestic cats were tested with a glutathione S-transferase capture ELISA test to detect antibodies specific to capsid (Gag), accessory (Bet) and envelope (Env) FFVfca antigens. A Western blot test was used to confirm the ELISA results.

Results
The cut-off value for the Gag antigen was established by calculation and evaluation with the immunoblotting assay. The cut-off values for Bet and Env were calculated from the reactivity of Gag-negative samples. The sera of 99 cats (44%) showed reactivity to Gag, those of 80 did so (35.9 %) to Bet, while only 56 samples (25%) were reactive to Env. Only 51 (22.9%) sera were positive for all antigens. The main diagnostic antigen was selected to be Gag. A statistically significant association was found between FFVfca status and the age of the cat.

Conclusions
This study proved the high seroprevalence of FFVfca in domestic cats in Poland for the first time and confirmed that adult cats are at higher FFVfca infection risk than preadult cats. Its results correspond to those reported from other countries.
Evaluation of Solar Energy Efficiency by Composite Index over Four Continents
Authors: Haine Kamel , Blumberga Dagnija 
Published: October 2021

Abstract
This paper aims to provide an evaluation of solar energy efficiency by composite index and to compare the value of solar energy across 19 countries located over four continents: Europe, Africa, America, and Asia. 15 indicators were evaluated for the year of 2019 and grouped into four dimensions: economic, social, technical, and environmental. Analytical Hierarchy Process (AHP) was used to estimate the weight of each indicator, and consistency tests were calculated to evaluate weight efficiency. The obtained results of the SEI reveals that the technical dimension and economic dimension play an important role in the solar energy efficiency of a country. The results indicate potential improvement areas for increasing solar efficiency. SEI can be used as a tool in assessing solar energy potential integration in a country.
Heat Pump Use in Rural District Heating Networks in Estonia
Authors: Lepiksaar Kertu , Kalme Kiur , Siirde Andres , Volkova Anna 
Published: October 2021

Abstract
District heating has proven to be an efficient way of providing space heating and domestic hot water in populated areas. It has also proven to be an excellent way to integrate various renewable energy sources (RES) into the energy system. In Estonia, biomass covers most of the heat demand, but carbon-intensive fuels are still used to cover peaks and lows. Heat pumps can be a good solution for rural areas, as there is usually plenty of land available for heat pump facilities. In addition, heat pumps require low-grade heat sources such as ambient air, groundwater, lakes, rivers, sea, sewage water, and industrial waste heat. One of the downsides of heat pumps is the need for large investments compared to boilers fired by natural gas and biomass, and electric boilers. This study examines the impact of heat pump use on consumer prices for district heating in rural district heating networks in Estonia.
Environmental Aspects of Resource-Saving Cement Technology
Authors: Miryuk Olga 
Published: October 2021

Abstract
The article outlines the main problems that the cement industry causes to the environment. Authors propose technological solutions aimed at resource-saving in cement production and environmental protection. The research is devoted to low-energy cement obtained on the basis of waste from processing skarn-magnetite ores. The characteristics of the composition and properties of the technogenic material are given. The authors have justified the feasibility of using skarn-magnetite ore enrichment waste as a part of a cement raw material mixture. The possibility of changing the composition of cement by reducing the energy-intensive alite phase is demonstrated. Technological and heat engineering calculations confirming the reduction of natural mineral raw materials and fuel costs in the production of cement were carried out. The processes of hydration of the developed cements have been investigated. A method for accelerating the hardening of low-base cements due to mechanical activation, the introduction of mineral additives and a modifier is proposed. The research revealed construction and technological advantages of the developed cements, which exhibit increased resistance during operation in an aggressive environment. Physical and mechanical tests of concretes made of low-base cement were carried out. The possibility of reducing the temperature during the heat treatment of concrete is proved. Physical and mechanical tests of concretes made of low-base cement were carried out. The paper presents environmental benefits of the developed cement technology.
On the Classification of Solutions of Quantum Functional Equations with Cyclic and Semi-Cyclic Supports
Authors: Nguyen Lan 
Published: October 2021

Abstract
In this paper, we classify all solutions with cyclic and semi-cyclic semigroup supports of the functional equations arising from multiplication of quantum integers with fields of coefficients of characteristic zero. This also solves completely the classification problem proposed by Melvyn Nathanson and Yang Wang concerning the solutions, with semigroup supports which are not prime subsemigroups of ℕ, to these functional equations for the case of rational field of coefficients. As a consequence, we obtain some results for other problems raised by Nathanson concerning maximal solutions and extension of supports of solutions to these functional equations in the case where the semigroup supports are not prime subsemigroups of ℕ.
The Inequality of Erdős-Turán-Koksma in the Terms of the Functions of the System Γ ℬ
s
Authors: Petrova Tsvetelina 
Published: October 2021

Abstract
In the present paper the author uses the function system Γ
ℬ

s

constructed in Cantor bases to show upper bounds of the extreme and star discrepancy of an arbitrary net in the terms of the trigonometric sum of this net with respect to the functions of this system. The obtained estimations are inequalities of the type of Erdős-Turán-Koksma. These inequalities are very suitable for studying of nets constructed in the same Cantor system.
ALTERNATIF PENGEMBANGAN RUANG PUBLIK KOTA: TAMAN SPOT BUDAYA DUKUH ATAS - JAKARTA
Authors: Gerry Gerry , Fahmi Erwin 
Published: October 2021

Since the end of the 1980s Indonesia’s property business has been growing rapidly, especially in Jakarta. The growth has transformed green open space gradually to commercial uses. Along with that, there has also been a social shift in Jakarta and its satellite cities. Citizen maximizes their earnings from working at the office and trading in order to maintain (and upgrade) their welfare. As a result, their leisure time (including enjoying the park) worn off. Taman Spot Budaya Dukuh Atas (TDA) has been a Jakarta provincial government’s solution to such issues, i.e decreasing number of parks and open spaces, and the limited time available to enjoy them. A review in user appreciation, adaptation to current and upcoming trends, and its compatibility as public space and third space will be a benchmark for modern public space development. This study applies a qualitative research approach with a case study method. TDA proves to be one of the people’s option to hang out at public space, especially in a crowded city district. TDA also fulfilled public space, third space, and Jakarta government’s goals. But better maintenance and improvement are needed to ensure its sustainability. The concept of public space that can be enjoyed in a short time are expected to be replicated to several other crowd points in Jakarta and other major cities in the future. Keywords: Dukuh Atas; green open space; user appreciation; modern public space AbstrakSejak akhir 1980-an bisnis properti berkembang pesat di Indonesia, khususnya di Jakarta. Perkembangan ini mengkonversi lahan-lahan terbuka hijau menjadi lahan dengan fungsi komersil. Seiring perkembangan tersebut, terjadi pula pergeseran sosial di Jakarta dan di kota-kota penyangganya. Masyarakat memaksimalkan perolehannya dari bekerja di kantor atau berdagang demi menjaga (dan meningkatkan) kesejahteraannya. Akibatnya, waktu luang untuk rekreasi (termasuk menikmati taman) menjadi berkurang. Taman Spot Budaya Dukuh Atas (TDA) adalah salah satu solusi Pemda DKI Jakarta dalam memberikan fasilitas ruang terbuka, sekaligus melayani kategori warga kota tersebut. Peninjauan apresiasi pengguna, adaptasi dengan kecenderungan yang ada, dan kesesuaiannya sebagai ruang publik serta ruang ketiga menjadi tolok ukur bagi alternatif pengembangan ruang publik modern. Penelitian ini menggunakan pendekatan penelitian kualitatif, dengan metode studi kasus. TDA dapat menjadi pilihan masyarakat untuk menikmati ruang publik, khususnya di pusat kota. TDA sendiri sudah memenuhi kriteria sebagai ruang publik dan ruang ketiga, serta sudah sesuai dengan tujuan awal Pemda DKI. Namun diperlukan pemeliharaan dan pengembangan dari pengelola taman yang lebih baik, agar ruang publik dapat berkelanjutan. Konsep penyediaan ruang publik yang dapat dinikmati secara singkat ini diharapkan dapat direplikasi di beberapa titik keramaian di Jakarta dan kota besar lainnya ke depan.
PENYESUAIAN PERENCANAAN AREA KOMPETISI DI STADION SEPAKBOLA UNTUK MENGATASI DAMPAK PANDEMI
Authors: Tjahya Timmy Setiawan , Lianto Fermanto , Priyomarsono Naniek Widayati , Winata Suwardana 
Published: October 2021

The football stadium is a building for soccer sports activities consisting of a field of play, athlete facilities/competition area, grandstand and facilities for spectators, both for match and training activities. With the COVID-19 pandemic, these facilities have to adapt to health protocols to reduce the spreading of the virus. Currently, there are stadiums in Indonesia that have been built and are still in the planning stage, and this study focuses on adjusting the planning of the Competition Area as part of the athlete/player facilities at the Football Stadium. This study tries to explore, interpret, explain and make adjustments to the planning of the Football Stadium Competition Area following the requirements of the pandemic prevention health protocol. As the result of the study, an adjustment plan is needed in the football stadium competition area to overcome the impact of the pandemic. Redesign in the form of adding access screening facilities for personnel entitled to enter by adjusting the detection facilities on access to the competition area corridor and making restrictions through access control, except for evacuation needs and maintenance. Keywords: Football Stadium; Competition Area; Pandemic; Planning Adjustments AbstrakStadion sepakbola adalah bangunan untuk kegiatan olahraga sepakbola yang terdiri dari arena olahraga/permainan, fasilitas atlit/area kompetisi dan fasilitas untuk penonton, baik untuk kegiatan pertandingan maupun latihan. Dengan adanya pandemi COVID-19, fasilitas ini harus menyesuaikan dengan protokol kesehatan agar tidak menjadi sarana penyebaran virusnya. Saat ini, terdapat terdapat stadion-stadion di Indonesia yang sudah terbangun dan yang masih dalam tahap perencanaan, studi ini fokus kepada penyesuaian perencanaan Area Kompetisi sebagai bagian dari fasilitas atlit/pemain di Stadion Sepakbola. Penelitian ini dilakukan secara kualitatif dengan menggunakan metode Studi Kasus, mengeksplorasi dan menyusun penyesuaian perencanaan Area Kompetisi Stadion Sepakbola yang sesuai dengan persyaratan protokol kesehatan pencegahan penyebaran Pandemi. Sebagai hasil penelitian dapat disimpulkan bahwa perbaikan permanen diperlukan sebagai penyesuaian area kompetisi stadion sepakbola untuk mengatasi dampak pandemi yaitu berupa penambahan sarana penyaringan akses bagi personil yang berhak masuk, dengan melakukan penyesuaian fasilitas pendeteksi pada akses masuk ke koridor area kompetisi dan membuat pembatasan melalui kontrol akses, dengan pengecualian untuk kebutuhan evakuasi dan kondisi non match day untuk pemeliharaan.
EVALUASI KINERJA STRUKTUR DUAL SYSTEM DENGAN BELT TRUSS
Authors: Utomo Dwi Prasetyo , Soegiarso Roesdiman 
Published: October 2021

In structural engineering applications, the limit of building deflection or interstory drift is an important issue. In high-rise buildings that are more than or equal to 60 floors in the current era, systems are used in the structure of the building. The function of the Belt Truss is to reduce the deflection that occurs in the building by converting the building's overturning moment into the axial force of the exterior column. The Belt Truss structure itself can use reinforced concrete structures and steel structures. Because the Belt Truss structure is an innovation in the world of structural engineering, the parameter values for earthquake loads are not listed in the applicable Building Planning Standards. The standard for earthquake-resistant building regulations requires the parameters of Response Modification Factor (R), Overstrength Factor (Ωo), and Deflection Magnification (Cd) for determining earthquake loads. Because the parameters on the Belt Truss structure are not listed in the Standard for Earthquake Resistant Building Regulations, a study of the earthquake load parameters on the Belt Truss structure was carried out. The method used in this research is a literature study using Pushover Load Analysis according to ATC - 40 and FEMA 356. Keywords: Belt Truss, Dual System; ATC – 40; FEMA 356; Response Modification Factor (R); Overstrength Factor (Ωo); and Deflection Magnification (Cd) AbstrakDalam aplikasi rekayasa struktur gedung, batasan defleksi bangunan atau interstory drift adalah masalah penting. Pada bangunan tinggi yang lebih dari atau sama dengan 60 lantai pada era sekarang sudah menggunakan sistem pada struktur bangunan tersebut. Fungsi dari Belt Truss tersebut berguna untuk mengurangi defleksi yang terjadi pada bangunan dengan mengkonvesi momen guling bangunan menjadi gaya aksial kolom eksterior. Struktur Belt Truss sendiri materialnya bisa menggunakan struktur beton bertulang dan struktur baja. Karena struktur Belt Truss merupakan inovasi pada dunia rekayasa struktur, maka nilai parameter beban gempa tidak tercantum pada Standar Peraturan Perencanaan Bangunan yang berlaku. Standart Peraturan Bangunan tahan gempa diperlukan parameter – parameter Faktor Modifikasi Respon (R), Faktor Kuat Lebih (Ωo), dan Perbesaran Defleksi (Cd) untuk penentuan beban gempa. Dikarenakan parameter pada struktur Belt Truss tidak tercantum pada Standar Peraturan Bangunan Tahan Gempa, maka dilakukan penelitian parameter-parameter beban gempa pada struktur Belt Truss tersebut. Metode yang digunakan dalam penelitian ini adalah studi literatur dengan menggunakan analisa Beban Dorong Pushover Analysis sesuai ATC - 40 dan FEMA 356.
ANALISA AKAR MASALAH RADIAL RUN OUT BAN MENGGUNAKAN DECISION TREE
Authors: Biantoro Bambang , Hernadewita Hernadewita 
Published: October 2021

Problem solving in the multistage production process is a challenge for the industry. The use of modern techniques such as machine learning in solving quality problems continues to be developed. One of the machine learning is decision tree. The tire industry entered the era of industrial revolution 4.0 with the use of information technology. Utilizing data using machine learning in finding the root cause of the problem can support the tire industry in industrial competition. This study aims to explore the process data in the tire industry to solve one of the tire quality problems, namely radial run-out tires. The technique of finding the root of the problem in this research is done using Classification and Regression Tree (CART) technique. Input variables involve 60 factors in the production process. From the research, it was found that the factors that influence the radial run out value are the lot of the Tread, Bead and Sidewall components. The factors causing the high radial run-out of the tires are the variations in the lot of the tire components Tread and Bead. The decision tree model that was formed has a precision level of 74.7% in detecting high radial run-out events. The effects of improvement on the lot tread and bead components resulting from the decision tree can reduce the defect of radial run out rate by 99.9%. Keywords: Decision tree; Root cause analysis; Radial run-out Tire; Data mining AbstrakPemecahan masalah pada proses produksi multistage merupakan tantangan untuk indusri. Pemanfaatan teknik modern seperti machine learning dalam pemecahan masalah kualitas terus dikembangkan. Salah satu machine learning adalah decision tree. Industri ban memasuki era industri revolusi 4.0 dengan adanya pemakaian teknologi informasi seperti barcode atau radio frequency identification. Pemanfaataan data dengan menggunakan machine learning dalam pencarian akar masalah bisa mendukung industri ban dalam kompetisi industri. Penelitian ini bertujuan untuk mengekplorasi data proses pada industri ban untuk memecahkan permasalahan kualitas ban yaitu radial run-out ban. Teknik pencarian akar masalah dilakukan menggunakan Clasification and Regression Tree (CART). Variabel input melibatkan 60 faktor dalam proses produksi. Dari penelitian didapatkan faktor yang mempengaruhi nilai radial run out adalah lot komponen Tread, Bead dan Sidewall. Untuk faktor penyebab tingginya radial run-out ban adalah variasi lot komponen Tread dan Bead. Model decision tree yang terbentuk memiliki tingkat presisi 74,7% dalam mendeteksi kejadian radial run-out berkategori tinggi. Efek perbaikan pada komponen lot Tread dan Bead yang dihasilkan dari decision tree dapat menurunkan tingkat defect radial run- out ban sebesar 99,9%.
Mortalitas dan bobot badan tiga strain ayam broiler pada kepadatan kandang yang berbeda
Authors: Setiaji Asep , Nurfaizin  , Ma’rifah Binti , Krismiyanto Lilik 
Published: October 2021

The aim of this study was to analyze the effects of strain, density and their interaction on mortality and body weight of broiler chicken raised in the closed houses. The data was obtained from 60 broiler farms in the Central Java province. Three strains were Cobb, CP 707, and Loghman. The density level was classified into three groups: £10, >10 to <15, and ³ 15 birds/m2. Parameters observed were mortality and body weight in the first week to the fifth week (M1, M2, M3, M4, and M5) and (BB1, BB2, BB3, BB4 dan BB5), respectively. Test of significance effect for strain and density was performed using Mixed procedure of Statistical Analysis System (SAS) University Edition V.6p.2. software. The results showed that density was significant (P<0,01) on the first week (M1), their interaction was (P<0,01) on M1 and (P<0,05) on the fourth week (M4), but not significant on body weight. The conclusion from this study there was an interaction between genetic and environment on mortality one week after chick in and nearly harvesting.
RAW WATER QUALITY ANALYSIS TO DISCOVER THE CAUSE OF PIPELINE SCALLING PROBLEM IN PT. X (ICE PRODUCTION COMPANY)
Authors: Harmayani Kadek Diana , Sudiartha Gede Adi Wiguna , Suyasa I Wayan Budiarsa 
Published: October 2021

PT. X is one of the ice companies in which its largest company is located in Bali, more precisely in the Pidada area, North Denpasar. Based on field observations the area is an area that has a calcareous soil structure. The water source of PT. X was extracted from the groundwater. From the field observation, it was found that the pipeline network, that connected the inlet water to water treatment system and ice production units, was severely covered by faint white scale. In order to discover the origin of this scale, water quality testing need to be carried out. From the results, it was found that the total hardness in the inlet water, taken from the groundwater tap, was 162.85 mg/l with calcium concentration of 2.15 mg/l and iron 3.83 mg/l. Water quality testing was also carried out in the water treatment unit consisting of resin softener where the total hardness surprisingly increased into 279.81 mg/l, calcium concentration was 2.96 mg/l, iron concentration was 0.55 mg/l. Even after being treated in softener resin, the total hardness increased sharply to 483 mg/l, which categorized as extreme hardness. The increase in total hardness indicates that there was a failure in the operation of the water treatment system, even it also contributed to the higher hardness and calcium concentration. This over-year’s treatment failure has been causing accumulation of hardness and calcium concentration in the compartment of both water treatment system and ice production unit that inflicts a higher hardness level in the effluent.
Association between interleukin-17F rs763780 polymorphism and psoriasis risk: A meta-analysis
Authors: Xiang Zhi , Hao Zhimin , Cui Pangen , Lin Lin , Chen Min , Chen Pro Min 
Published: October 2021

Background:
The polymorphism of interleukin-17F rs763780 has been found to have a probable association with increased risk of developing psoriasis.

Aims:
This study aims to get a more convincing estimation of the association between the interleukin-17F rs763780 T /C polymorphism and psoriasis risk.

Methods:
Two authors independently searched the databases including PubMed, EMBASE, Cochrane Central Register of Controlled Trials, Chinese National Knowledge Infrastructure, Wanfang and Chinese Biomedical Literature Databases for case–control studies which reported the odds ratios with 95% confidence intervals comparing genotype and allele frequencies of the interleukin-17F rs763780 polymorphism in patients with psoriasis versus participants without psoriasis.

Results:
A total of seven case–control studies incorporating 1824 cases and 1585 controls were identified. The pooled odds ratios indicated that interleukin-17F rs763780 C allele was a risk factor for psoriasis in allele frequency, recessive model and homozygote model (P < 0.05). Subgroup analysis by ethnicity further indicated that the C allele was closely related to increased risk of psoriasis in Asian populations (P < 0.05), but not in Caucasians.

Limitations:
Only a few studies on the interleukin-17F rs763780 polymorphism in psoriasis have been reported till date, thus the data is insufficient. Only one gene polymorphic site was selected for this study, and it is not clear whether other genetic mutation functional sites affect the gene. Further studies on confounding effects of other genetic polymorphisms are needed.

Conclusion:
The present meta-analysis results suggested that the interleukin-17F rs763780 T /C is significantly associated with psoriasis risk in Asians.