bluuebunny/crossref_metadata_2025_split huggingface dataset:
Experimental Investigation on Performance of Vapor Compression Refrigeration System using Nanorefrigerant (R134a+Al2O3) with Evaporative Condenser
Authors: Raja Niraj N. , Khanderao Avinash D. 
Published: April 2022

In traditional refrigeration system the focus of researchers is always to improve its performance by reducing work of compression & enhancing the heat transfer rate in different heat exchangers and this can be achieved by adopting suitable technique. In this research work experiment is carried out on vapor compression refrigeration test rig using nanorefrigerant of R134a as base refrigerant and nanoparticles of aluminium oxide Al2O3 in different concentration so that variation in heat transfer rate can be observed. The different concentration of Al2O3 (gm/litre) in R134a were prepared, studied, and tested experimentally in VCR test rig. The test rig consists of evaporative condenser as conventional air-cooled condenser does not perform well in hot and dry climatic conditions. This evaporative air cooling offers desired heat rejection rate in condenser at high pressure and enhances system performance. The investigations show that nano refrigerant (R134a+ Al2O3 0.5gm/L Concentration & 50-60nm size) with evaporative condenser recorded the highest coefficient of performance among all other combination of nanorefrigerant. This indicates that nanorefrigerant can be safely experimented without any blockage or difficulty. The conventional VCR system operated with evaporative condenser without nanorefrigerant also shows improvement in performance compared to simple VCR with air cooled condenser. This system is suitable for hot and dry climate conditions.
Automatic Detection and Characterization of Weld Defects Using CNN Algorithm in Machine Learning
Authors: Ramesh Krishnan S. 
Published: April 2022

Conventional radiographic technique uses visual inspection of scanned output for defect detection. This makes the inline testing of products time consuming and hectic. Convolutional Neural Network (CNN) algorithm in machine learning can be used for the automation of defect detection in radiography thereby reducing human intervention and associated delays. By the use of robotics the welding parameters can be adjusted and the issue of welding defects can be resolved. By combining the two, the defect detection process can be modified into a digital manufacturing process. A dataset created from radiography test data is used for training the algorithm and for writing a program to train this dataset which can be used for defect detection and its characterization.
Enhancement and Optimization of Solar Dryer: A Review
Authors: Gaur Aditya 
Published: April 2022

Infinite accessibility of solar energy and continuously reducing reserves of fossil fuel has led the humankind to use solar energy in efficient way for various requirements. One of the important requirements is drying, i.e. drying of various edible products, crops, etc. Research has been done on various ways to improve dryer efficiency, which includes depleting drying time, improving product quality coming out of dryer, minimizing energy loss, etc. This paper reviews the previous work done on optimization and enhancement of solar dryer. Techniques for optimizing solar dryer such as Artificial Neural Network, Genetic Algorithm, Response Surface Methodology, etc. have been studied whereas use of energy storage medium like Phase Change Material and other factors like geometrical parameter, solar dryer with thermal storage for enhancement of solar dryer has been reviewed.
RIWAYAT HIPERTENSI DENGAN PENYAKIT JANTUNG PADA PASIEN YANG PERNAH TERPAPAR COVID 19
Authors: Andriati Riris , Rianti Beti , Pratiwi Rita Dwi 
Published: April 2022

The increase in the number of Covid-19 cases occurred so quickly. Indonesia is one of the countries affected by Covid-19 with data on 228,993 confirmed cases of Covid-19 from March 2, 2020 to September 16, 2020 with the addition of 3,963 new cases, 9,100 deaths (CFR 4.0%), recovered cases 164,101 (71.2%) and 55,792 cases under treatment 24.4%. The objective of study was to determine whether there is a relationship between a history of hypertension and heart disease in patients who have been exposed to Covid 19 in the South Tangerang area. The research method in this research is quantitative research, a cross sectional design, with a sample of 57 respondents. From the results of the study, the average respondent with a history of hypertension and a history of heart disease was around 41-50 years old as many as 23 people (40,4%) with an average value of 2,70 and a standard deviation of 0,91. Meanwhile, the average respondent who had been exposed to Covid with a history of heart disease and hypertension was 29 men. The results of statistical tests obtained p-value 0.015, so there is a relationship between a history of hypertension and heart disease in patients who have been exposed to Covid-19 in the South Tangerang area. Suggestions of this study are expected that educational institutions can improve and determine various educational programs that can disseminate information about Covid-19, especially for people who have a history of heart disease and hypertension. So that the number of Covid-19 exposures does not increase.ABSTRAKPenambahan jumlah kasus Covid-19 terjadi begitu cepat. Indonesia salah satu negara yang terkena dampak Covid-19 dengan jumlah data kasus terkonfirmasi Covid-19 228.993 dari 2 Maret 2020 sampai dengan per 16 September 2020 dengan penambahan kasus 3.963 kasus baru, 9100 kasus meninggal (CFR 4,0%), kasus sembuh 164.101 (71,2%) dan 55.792 kasus dalam perawatan 24,4%. Tujuan penelitian ini adalah untuk Mengetahui Hubungan Antara Riwayat Hipertensi Dan Penyakit Jantung Pada Pasien Yang Pernah Terpapar Covid 19 di Wilayah Tangerang Selatan. Metode penelitian dalam penelitian ini adalah penelitian kuantitatif, desain cross sectional dengan sampel sebanyak 57 responden. Dari hasil penelitian diperoleh responden dengan riwayat hipertensi dan riwayat penyakit jantung berumur sekitar 41 – 50 tahun sebanyak 23 orang (40,4%) dengan nilai rata-rata 2,70 dan standar deviasi 0,91. Sedangkan sebagian besar responden yang pernah terpapar Covid dengan riwayat penyakit jantung dan hipertensi berjenis kelamin laki-laki sebanyak 29 orang. Hasil uji statistik diperoleh nilai p-value 0,015 artinya ada hubungan antara riwayat hipertensi dengan penyakit jantung pada pasien yang pernah terpapar Covid-19 di wilayah Tangerang Selatan, diharapkan penelitian ini dapat dijadikan sebagai pedoman oleh perawat dalam memberikan pendidikan kesehatan kepada pasien yang terpapar Covid 19 dengan riwayat penyakit hipertensi dan penyakit jantung.
<span>Điều kiện co ciric sưy rộng trong kh&ocirc;ng gian <em>b</em>-metric</span>
Authors: Nguyễn Văn Dũng , Nguyễn Thị Trúc Linh 
Published: April 2022

Trong bài viết này, chúng tôi mở rộng kiểu co Ciric trong không gian b-metric (Lu, He và Du, 2019) bằng cách thêm vào 4 số hạng ρ(T2x,x), ρ(T2x,Tx), ρ(T2x,y), ρ(T2x,Ty), để trở thành ρ(Tx,Ty) < λmax{ρ(x,y), ρ(x,Tx), ρ(y,Ty), ρ(x,Ty), ρ(Tx,y), ρ(T2x, x), ρ(T2x, Tx), ρ(T2x, y ), ρ(T2x, Ty)} trong đó W là không gian b-metric, T : W → W và x, y ∈ W.
Khảo sát hàm lượng phenolic tổng và đánh giá hoạt tính chống oxi hóa của dịch chiết từ bã cà phê được trồng tại tỉnh Đắk Lắk
Authors: Huỳnh Văn Chung , Đinh Thị Thanh Vy 
Published: April 2022

Việc chiết xuất các hợp chất phenolic chống oxy hóa từ bã cà phê (SCG) đã qua sử dụng đã được nghiên cứu. Các thí nghiệm chiết được thực hiện theo phương pháp rắn - lỏng thông thường, sử dụng ethanol làm dung môi tại các nồng độ khác nhau (0 – 90%, v/v), tỷ lệ nguyên liệu/ dung môi (1:10 – 1:40 g/ml), thời gian chiết (10 – 80 phút) và nhiệt độ (30 – 70oC), pH (2-8). Hiệu quả của quá trình chiết xuất được đánh giá thông qua việc xác định hàm lượng phenolic tổng. Hoạt tính kháng oxi hóa cũng được đánh giá thông qua khả năng ức chế H2O2. Nhìn chung hiệu suất chiết tốt nhất khi sử dụng dung môi ethanol có nồng độ 50%; tỉ lệ nguyên liệu/dung môi (NL/DM) thích hợp là 1:40 (g/ml); nhiệt độ 60oC, thời gian chiết là 45 phút, pH = 5. Hàm lượng phenolic là 20,825 mg acid gallic/g nguyên liệu. Hoạt tính kháng oxi hóa tốt với IC50 là 313,447 µg/ml. Những phát hiện này được quan tâm vì các hợp chất phenolic chống oxy hóa có một vai trò nổi bật trong lĩnh vực y tế và các ứng dụng rộng rãi trong thực phẩm và dược phẩm.
Using Fuzzy Inference System in Gas Turbine to Overcome a High Exhaust Temperature Problem
Authors: Al-Dabooni Seaar Jawad , Al-Shawi Hussein Abdul Shaheed 
Published: April 2022

The turbine units are at the forefront of equipment in the process of pumping crude oil and exporting it to the oil ports, where there are many types of turbines used in different sites of Iraqi stations whether pumping oil stations or electrical power production stations. One of the most important types of turbines is the gas turbine, which is frequently used in oil depots. One of the remarkable depots in Iraq is Zubair-1 / Basra that exports around 850,000 barrels per day (B/D). Therefore, Zubair-1 should continue pumping the crude oil 24/7, which has five gas turbines (three Rolls-Royce AVON MK 1533 and two Siemens SGT 400). However, the three Rolls-Royce gas turbines in Zubair-1 have not worked in the summer season since 2016, when the ambient temperature goes high around 11:00 am to 3:30 pm. This paper proposes solution to solve a high exhaust temperature (EGT) shutdown signal (a preventing running turbine signal) without effect on the sequence of turbine running stages. The proposal is adding a fuzzy inference system (FIS) that controls the gas turbine in the first two running stages that demonstrates and controls of speed the turbine from 800 RPM to 3000 RPM. The inputs of FIS are the average temperature of eight combustion chambers (exhaust temperatures) and the speed of the gas turbine, while the output of FIS is the control signal to the flow control valve (FCV) with an amplifier to gain the signal.
The FIS proposal has been applied in all three Rolls-Royce jet pumping turbines since April 7, 2021, and they work regularly at all times of the day. The FIS minimizes the maximum average of combustion chambers temperature at midafternoon in June 9, 2021 (48 ˚C ambience temperature) from 689 ˚C to 610 ˚C that means the improvement is around 45%.
Membrane Distillation Technology Using for Desalination of Associated Oil Water Production and Study Efficiency of Feed Water Operation Parameter on Air Gap Membrane Distillation Process Production
Authors: Alfaez Safaa Abdul Ghany 
Published: April 2022

In this study; membrane distillation technology using to associated oil water production desalination by air gap membrane distillation unit to removed salt from the water after separating oil product, via PTEF commercial hydrophobic membrane distillation with 0.22 µm porous and 0.011 m contact surface area, evaluated the desalination system and operation parameter for feed water effected on process production by employment the distillation under boiling point temperature that getting commercial increments and study the energy gain by calculating the GOR of the desalination process.
The study focusing on the air gap membrane distillation desalination process by a range of temperature after primary simple sedimentation and filtration it's obtained salt rejection up to 98.9% that proves process separation efficiency. Evaluated the mean operation parameters of feed water affected on permeate water production when selected the feed temperature and flow rate with fixed coolant temperature, coolant flow rate, and air gap width to get an optimum range for feed water operation parameter to obtain optimum value to permeate water production and saving energy.
Studying the effect ZnONP Deposited on ST37-2 by Pulse Laser Depositions Technique for Corrosion Protection Using in Oil Storage Applications.
Authors: Abbas Ahmed S. , Anon Eman A. , Sayyid F. F. 
Published: April 2022

In the study, zinc oxide nanoparticles (ZnONP) were coated on carbon steel substrates via pulse laser deposition (PLD) process, in order to achieve passive layers of nanocoating. ST37-2 a type of steel is used in the manufacture of tanks that are used in oil applications, which suffers from corrosion, this will lead a large losses. Electrochemical technique (Tafel polarization completion) has been carried out for study the corrosion behavior of this steel coating type. The specimens of steel were examined in aqueous solution containing about 3.5 wt. % NaCl using polarization method, with power of hydrogen (pH) held to value 4.0, in order to evaluated the corrosion rate. ZnONP. Characteristics and topographic nanocoating by PLD technique were evaluated by Field Emission Scanning Electron Microscope (FESEM) and X-ray Diffraction (XRD) tests. Where semi uniform nanoparticles of ZnONP were achieved with a nanoscale approximately ranging from 33-56 nm, While XRD pattern indicated the presence of ZnONP with different crystal structures. In other side the input parameters of (PLD) technique were substrate temperature, number of pulse and fluencies energy have been examined, in order to study their influence on the rate of corrosion reduction. The results indicate that number of shoots pulse has a significant effect the corrosion rate in operation of PLD technique, which is highest among the contributions of the other parameters. Enhancement about 56% is achieved of ST37-2 coated with (ZnONP) deposition, as compared with uncoated steel.
قياس وتحليل أثر الايرادات النفطيـــة في معدلات التضخـــــــم في الاقتصاد العراقي للمدة (1990 – 2015)
Authors: الجبوري ختام حاتم , محسن محمد , سكران ابراهيم 
Published: April 2022

تعد الثروة النفطية احدى المقومات الاساسية في البلدان التي تمتلك تلك الثروة ويعتبر العراق ثالث اكبر البلدان التي تمتلك ثروة نفطية بعد المملكة العربية السعودية والولايات المتحدة الامريكية والذي يشكل النفط اكثر من 95))% في موازنته العامة، الا ان الاعتماد المفرط على هذه الثروة في تمويل اقتصاداتها جعلها تتسم بالريعية اذ تختلف تأثيرات تقلبات اسعار النفط على البلدان المصدرة بحسب نسبة مساهمتها في الناتج المحلي الاجمالي اذ نجد البلدان التي تكون ذات اقتصاد احادي الجانب تكون اكثر عرضة لتقلبات اسعار النفط وما لهذه التقلبات من تأثيرات كبيرة على ارتفاع الاسعار بشكل عام وحدوث التضخم الذي يكون ارتفاع الاسعار فيه بشكل مستمر ويعتبر التضخم احد متغيرات الاقتصاد الكلي الذي يتأثر بشكل كبير بالتقلبات التي تحدث بأسعار النفط والذي يؤثر بالاقتصاد بشكل واضح، وعلى هذا الاساس ركز البحث على ايضاح تأثير التغيرات او التقلبات التي تحدث في اسعار النفط على احدى متغيرات الاقتصاد الكلي وهو التضخم، اكد البحث بضرورة تنويع مصادر الموازنة وعدم الاعتماد على مورد واحد ريعي وهو النفط بضرورة تبني سياسات اقتصادية تتلاءم مع دور القطاع النفطي في الاقتصاد العراقي وتخفيض معدلات التضخم من خلال تبني سياسة اقتصادية ملائمة.
“To Continue Their Illustrious Breed”: Aristocracy, Democracy, and the Search for Dignity in The House of the Seven Gables
Authors: Groff Martin J. 
Published: April 2022

ABSTRACT
Political philosophers have noted that while modern democracies define dignity as universal human worth, nineteenth-century Americans conceptualized it in terms of social status and rank hierarchy. However, there was considerable tension in this period between the traditional aristocratic ideal and a more modern liberal philosophy of where this rank-based dignity came from and how someone could possess it. This article demonstrates that Nathaniel Hawthorne’s The House of the Seven Gables narrates an encounter between these two philosophies and asks whether either of them, or some combination, can be reconciled with democracy’s egalitarian ideals. By contrasting the Colonel with the Judge and Hepzibah with Holgrave, Hawthorne identifies the elitism that underlies both concepts of dignity in America and investigates whether they can be excised or reformed. Ultimately, I argue that the novel portrays dignity, as conceived in the nineteenth century, as a fundamentally undemocratic remnant of the aristocratic past that has become deeply rooted beneath a democratic façade in America.
Insistent Hope as Anti-Anti-Utopian Politics in N. K. Jemisin’s Broken Earth Trilogy
Authors: Tabone Mark A. 
Published: April 2022

ABSTRACT
This article discusses the politics of hope in N. K. Jemisin’s Broken Earth trilogy. Drawing on scholarship in utopian studies, science fiction studies, and Africana studies, it discusses the ways in which Jemisin uses two intentional community experiments depicted in the trilogy as “critical utopias” in order to work through problems involved in collective living, including the potentially anti-utopian aspects of these communities’ shortcomings. Ultimately, despite the apocalyptic setting that has attracted the most attention from critics, this article argues that The Broken Earth ultimately affirms the necessity of utopian hope, even amid anti-utopian circumstances, and as such is an important and timely political statement. In a historical moment marked by social and racial strife and, in the literary realm, by what Sean Guynes calls “dystopia fatigue,” Jemisin’s trilogy does not promise utopia, but insists on the need for hope in seemingly hopeless times, the “anti-anti-utopian” orientation described by Fredric Jameson.
Navigating Uncertainty: The Ambiguous Utopias of Le Guin, Gorodischer, and Jemisin
Authors: Bartles Jason A. 
Published: April 2022

ABSTRACT
The phrase “ambiguous utopia” was coined by Ursula K. Le Guin in the subtitle of her novel, The Dispossessed: An Ambiguous Utopia (1974). That work appeared when utopian narratives had been displaced by dystopian imaginaries. This article embarks on a comparative analysis of three short stories: Ursula K. Le Guin’s “The Ones Who Walk Away from Omelas” (1973), Angélica Gorodischer’s “Of Navigators” (1979), and N. K. Jemisin’s “The Ones Who Stay and Fight” (2018). Each author installs ambiguity at the center of their open-ended utopian imaginaries as a way to challenge dogma, pessimism, and complacency. Le Guin interrogates the boundary between belief and knowledge to hold the threat of authoritarianism at bay. Gorodischer, a friend and contemporary of Le Guin, is considered a central figure of Argentine science fiction and fantasy. Her story imagines the discovery of a second Earth set in 1492 and highlights the need for utopianism to challenge the legacy of colonization. Finally, Jemisin’s story is a critical homage to “Omelas.” Jemisin shares the decolonial impetus of Gorodischer’s fiction, and she constructs Um-Helat on an explicitly antiracist foundation. Instead of walking away, her characters actively fight the creeping threat of intolerance while working toward that better place.
SIMULASI PEMBAKARAN SERBUK BIOMASSA SEKAM PADI PADA	PROSES GASIFIKASI BERBASIS SOLAR CELL DENGAN VARIASI JUMLAH GLOWPLUG PADA PIPA
Authors: Suli Suliono 
Published: April 2022

Gasification is the process of converting solid biomass into a combustible gas. The process is carried out in a reactor known as a gasifier. The gasification process which is modeled in the simulation in this soliworks flow simulation software includes combustion pipes, reactors, and syn-gas pipes. The fuel used is rice husk powder with a capacity of 10.15 kg with top 57 cm bottom 54 cm with a height of 60 cm. This study uses several variations of glowplug in the combustion pipe with an average glowplug unit temperature of 797.80 °C. The air will be exhaled by a blower with a speed of 2924 rpm. Until the incoming air rate passes through the gasification reactor and the gas shape is displayed in a contour simulation which has a length of 102.98 mm. Inside the gasifier reactor, the upper reactor temperature is 474.25 °C, the middle reactor is 330.55 °C, and the bottom reactor is 394.40 °C. While the pipe that has a glowplug gets an air speed of 5.54 m/s and a temperature of 67.74 °C.
Keywords: Gasification, Gasifier Reactor, Solidwork, Simulation, Flow Simulation, and Glowplug
Development & characterization of clotrimazole multiple emulsion
Authors: Dhone PG , Gujaram Marandi , Sabitri Beshra , Neeta Rai , Neha Munot 
Published: April 2022

The present study is the development and characterization of clotrimazole multiple emulsion. The purpose of this research is to enhance the release of drug as well as the bioavailability of particular drug. After formulation of multiple emulsion of drug clotrimazole some characterization like pre-formulations and evaluation study was performed. It shows excellent results for all parameters. On the basis of in vitro drug release the zero-order release study shows that the ME-2 formulation is more stable and effective for antifungal activity.
Symptomatic Hyponatremia in a Patient With Hepatorenal Syndrome Treated with Terlipressin.
Authors: Ahmed Raheel , Ahmed Tanveer , Munib Syed 
Published: April 2022

Terlipressin (vasopressin analogue) is considered most promising pharmacotherapy used for reversal of hepatorenal syndrome and esophageal variceal bleed. It occasionally results in hyponatremia, often complicated by serious central nervous system manifestation. We report here a case of a 60 years’ old female known case of chronic liver disease decompensated who presented with acute kidney injury secondary to hepatorenal syndrome. Treatment was started with terlipressin loading dose followed by maintenance dose. She developed acute confusion, however there was no obvious brain pathology on computed tomography. Her baseline serum sodium (146.8mol/L) decreased to 111.5mmol/L after terlipressin was initiated. Terlipressin was withdrawn and responded to 3% hypertonic saline. Terlipressin-induced hyponatremia may be a rare complication and treating physicians should be aware of the possible complications arising during the management of hepatorenal syndrome.
Roman Pucinski: A Daughter's Memoir
Authors: Pucinski Aurelia Marie 
Published: April 2022

Abstract
The daughter of Roman and Aurelia Bordin Pucinski, Aurelia Marie Pucinski earned a baccalaureate degree in history from Catholic University of America in Washington, DC, and a JD from DePaul University College of Law in Chicago. In 2004, she became a judge on the Cook County (Illinois) Circuit Court and in 2010 gained election to a seat on the Illinois Appellate Court. As the daughter of Roman Pucinski and a community activist in her own right, she provides in this memoir an intimate “insider” look at her father's work as a congressman and an alderman and in the Polish community, as well as that of her grandmother, Lidia Pucinski.
Plataforma robótica móvil controlada por un teléfono inteligente usando el sistema operativo android
Authors: Gutiérrez Robert Eduardo , Aux Jorge Erazo , Muñoz Paulo Realpe 
Published: April 2022

El uso de sistemas inteligentes como los teléfonos celulares (Smartphone) ha permitido mejorar la capacidad de procesamiento, memoria, disponibilidad de bibliotecas en lenguajes de alto nivel, comunicaciones inalámbricas, manipulación de sensores e interacción usable con las personas por medio de una pantalla táctil.
Este artículo presenta el desarrollo e implementación de una Plataforma Robótica Móvil (PRM) que utiliza como controlador principal un teléfono inteligente usando el sistema operativo Android. El control consiste en el envío de una serie de comandos por medio del protocolo Bluetooth desde una aplicación desarrollada en lenguaje Java y XML. Estos comandos son recibidos por una placa electrónica que los convierte a protocolo serial y posteriormente son interpretados por una tarjeta Arduino. La PRM puede ser programada para realizar tareas automáticas, por lo cual se ha agregado a la aplicación un módulo para seguimiento de línea que utiliza motores tanto para tracción como para la dirección por medio de sensores ópticos. Finalmente, se puede utilizar el teléfono inteligente como control remoto y mediante el uso de un sensor acelerómetro incorporado, e inclinar el sistema hacia donde se quiere conducir la PRM.