bluuebunny/crossref_metadata_2025_split huggingface dataset:
Origami-based microwave absorber with a reconfigurable bandwidth
Authors: Chen Xiqiao , Li Wei , Wu Zhuang , Zhang Zilong , Zou Yanhong 
Published: February 2021

Reconfigurability is critical for the research fields in electromagnetics, mechanics, and acoustics, due to the controllability of functionalities. This Letter numerically and experimentally demonstrates an origami-based absorber with a reconfigurable bandwidth. The proposed structure provides four transformable models: flat sheet, single-arch-folded, double-arch-folded, and U-shaped strips filled, corresponding to the performance of nearly no absorption, one-peak absorption, two-peak absorption, and ultra-broadband absorption (3.4–18 GHz), which clearly demonstrates the bandwidth-enhancement effect. In contrast with the traditional structural absorbers, the transformable flat sheet and U-shaped strips are obtained by three-dimensional printing, which exhibits an obvious superiority in prototype fabrication. These results provide a feasible strategy for energy dissipation and origami transformation.
Sonographic findings in coronavirus disease-19 associated liver damage
Authors: Spogis Jakob , Hagen Florian , Thaiss Wolfgang M. , Hoffmann Tatjana , Malek Nisar , Nikolaou Konstantin , Berg Christoph P. , Singer Stephan , Bösmüller Hans , Kreth Florian , Kaufmann Sascha 
Published: February 2021

Purpose
This study was conducted to evaluate the role of liver sonography in patients with coronavirus disease 2019 (COVID-19) and elevated liver enzymes.

Materials and methods
In this retrospective study, patients tested positive for SARS-CoV-2 in our emergency ward between January 01 and April 24, 2020 and elevated liver enzymes were included (Cohort 1). Additionally, the local radiology information system was screened for sonographies in COVID-19 patients at the intensive care unit in the same period (Cohort 2). Liver sonographies and histologic specimen were reviewed and suspicious findings recorded. Medical records were reviewed for clinical data. Ultrasound findings and clinical data were correlated with severity of liver enzyme elevation.

Results
Cohort 1: 126 patients were evaluated, of which 47 (37.3%) had elevated liver enzymes. Severity of liver enzyme elevation was associated with death (p<0.001). 8 patients (6.3%) had suspicious ultrasound findings, including signs of acute hepatitis (n = 5, e.g. thickening of gall bladder wall, hepatomegaly, decreased echogenicity of liver parenchyma) and vascular complications (n = 4). Cohort 2: 39 patients were evaluated, of which 14 are also included in Cohort 1. 19 patients (48.7%) had suspicious ultrasound findings, of which 13 patients had signs of acute hepatitis and 6 had vascular complications. Pathology was performed in 6 patients. Predominant findings were severe cholestasis and macrophage activation.

Conclusion
For most hospitalized COVID-19 patients, elevated liver enzymes cause little concern as they are only mild to moderate. However, in severely ill patients bedside sonography is a powerful tool to reveal different patterns of vascular, cholestatic or inflammatory complications in the liver, which are associated with high mortality. In addition, macrophage activation as histopathologic correlate for a hyperinflammatory syndrome seems to be a frequent complication in COVID-19.
Issues and Potentials of Research Topics in Medicines:A Research Priority Setting (RPS) in The Indonesian Institute of Sciences (LIPI)
Authors: Kardoyo Hadi , Romadona Mia Rahma , Handoyo Setiowiji 
Published: February 2021

<p>This article ilustrates the findings of research priority setting (RPS) in the field of medicine and health at the Indonesian Institute of Sciences (LIPI) in 2017. This RPS has been conducted to address issues and explore potential research topics in LIPI in the area of drug and health industry. The RPS stage has been conducted with the Delphi Method and produced five major issues, namely 1). Structure of the pharmaceutical industry in Indonesia, 2). The Role government R&amp;D institutions and universities in the structure of the pharmaceutical industry, 3). Standardization and product supervision, and 5). Policies in the sectoral innovation system. Based on these major issues, LIPI has potential research topics that need to be developed, as follows: 1) Research on "<em>marker</em>" compounds and development of "<em>markers</em> <em>bank </em>", 2) Research on combinations of chemical compounds in medicinal and health products, 3) Social research related to public acceptance of medicinal products, 4) Research on the potential of herbal medicines originating from "<em>indigenous knowledge</em> ", 5) The need to develop a catalog of potential herbal medicinal ingredients, 6) Development of formulations of finished drug products based on the expired patent utilization, 7) Development of research for phytofarmaceutical products, 8) Development of research on reagents to support research activities in the fields of health and medicine, 9) Development of technological capabilities that is needed to support research activities in the fields of health and medical treatment, 10) Development of research topics by referring to the ministry's pharmaceutical industry development road map and 11) Research potential in R&amp;D institutions and universities with reference to R&amp;D and manufacturing scenario of APIs. The outputs of RPS will be the basis for LIPI to focus on research in the field of medicine and health for the years 2017­­­--2026.</p><p> </p>Keywords: research priority setting, pharmaceutical industry, medicine research, pharmaceutical industry
The efficacy and safety of glycosaminoglycan-peptide complex in patients with knee osteoarthritis and comorbidity: a multicenter prospective study
Authors: Alekseeva L. I. , Taskina E. A. , Kashevarova N. G. , Sharapova E. P. , Strebkova E. A. , Anikin S. G. , Chichasova N. V. , Raskina T. A. , Zonova E. V. , Otteva E. N. , Shmidt E. I. , Yakupova S. P. , Vinogradova I. B. , Ivanova O. N. , Lila V. A. , Zavadovsky B. V. , Shesternya P. A. , Lila A. M. 
Published: February 2021

Objective: to evaluate the efficacy and safety of glycosaminoglycan-peptide complex (GPC, Rumalon) used in patients with knee osteoarthritis (OA) and comorbidities (hypertension and/or type 2 diabetes mellitus (T2DM).Patients and methods: A 10-month multicenter (13 centers from 10 subjects of the Russian Federation) prospective study included 179 patients with Stages II–III primary tibiofemoral knee OA and comorbidity, a walking pain intensity of ≥40 mm on a visual analogue scale (VAS), and a need for nonsteroidal anti-inflammatory drugs (for at least 30 days in the previous 3 months). The efficiency of treatment was evaluated from the changes in VAS scores for knee pain intensity during walking, the overall WOMAC score and scores of its individual indicators, laboratory parameters, and ultrasound data. All the patients received 2 cycles of GPC treatment with 25 injections, by following the manufacturer's instructions.Results and discussion. Even at 2 months after starting the treatment, there was a statistically significant reduction in pain during walking from 60 (50–69) to 40 (27–53.5) mm on the VAS (p< 0.05), which persisted during the follow-up period. A similar pattern was found when assessing the WOMAC index and its components. The drug demonstrated an anti-inflammatory effect: a decrease in the number of patients with synovitis from 55.7 to 39.2% (p=0.02), the level of high-sensitivity C-reactive protein (hsCRP) from 3.2 (1.3–6.2) to 2.6 (1.2–5.7) mg/l (p< 0.05). GPC was ascertained to have a safety profile.Conclusion. The data of this study confirm the good therapeutic effect and safety of GPC Rumalon in knee OA patients with hypertension and/or T2DM. The drug is shown to have a rapid analgesic and anti-inflammatory effect, as well as a positive influence on all clinical manifestations of OA.
Zinc, a micronutrient and its effect to performance of BARI gom30
Authors: Gismy Salamun , Romij Uddin Md. , Sohanur Rahman Md. , Uddin Talukder Fakhar , Shafiul Islam Rion Md. 
Published: February 2021

To evaluate the effect of Zinc fertilizer on performance of wheat cv. BARI gom30, an experiment was carried out at Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh, from November 2015 to March 2016. The experiment comprised four levels of Zinc (Zn) viz., 0, 1.5, 2 and 2.5 kg/ha. The experiment was laid out in a randomized complete block design with three replications. Application of Zinc (Zn) plant height, number of total tillers/plant, number of effective tillers/plant, spike length, number of fertile spikelets/spike numbers of sterile spikelets/spike number of grains/ spike, grain yield and straw yield were found significant. But there was no significant effect of the treatment on 1000-grain weight. The highest number of total tiller/plant (4.42), number of effective tillers/plant (3.92), number of grains/spike (47.70), 1000-grain weight (47.73 g), grain yield (5.06 t/ha), straw yield (6.21 t/ha) was obtained from 2 kg Zn/ha. The highest plant height (94.08 cm), spike length (9.92 cm), number of fertile spikelets/spike (19.59) and sterile spikelets/spike (3.22) and harvest index (46.16%) were recorded at 0 kg Zn/ha respectively. The control treatment indicated the lowest value for the yield attributing characters except the number of sterile spikelets/spike. Grain yield was found to be significantly and positively correlated with number of grains/spike and straw yield. It is recommended that application of 2 kg Zn/ha is the best for maximum yield of BARI gom30.Â Â Â
Evaluation of seismic attributes for reservoir characterization over Edi field, Niger delta, Nigeria using 3d seismic data
Authors: O. Etuk Nyeneime , U. Aka Mfoniso , A. Agbasi Okechukwu , C. Ibuot Johnson 
Published: February 2021

Seismic attributes were evaluated over Edi field, offshore Western Niger Delta, Nigeria, via 3D seismic data. Manual mappings of the horizons and faults on the in-lines and cross-lines of the seismic sections were done. Various attributes were calculated and out put on four horizons corresponding to the well markers at different formations within the well were identified. The four horizons identified, which includes: H1, H2, H3 and H4 were mapped and interpreted across the field. The operational agenda was thru picking given faults segments on the inâ€“line of seismic volume. A total of five faults coded as F1, F2, F3, F4 and F5, F1 and F5 were the major fault and were observed as extending through the field. Structural and horizon mappings were used to generate time structure maps. The maps showed the various positions and orientations of the faults. Different attributes which include: root mean square amplitude, instantaneous phase, gradient magnitude and chaos were run on the 3D seismic data. The amplitude and incline magnitude maps indicate direct hydrocarbon on the horizon maps; this is very important in the drilling of wells because it shows areas where hydrocarbons are present in the subsurface. The seismic attributes revealed information, which was not readily apparent in the raw seismic data.Â Â Â
Direct plant regeneration through micropropagation using selected explants of sugarcane
Authors: Biswas Purnendu , Harun-Or Rashid Md. , Kashem Chowdhury Abul , Amzad Hossain Md. 
Published: February 2021

The experiment was conducted at the Laboratory of Biotechnology Division, Bangladesh Sugarcrop Research Institute (BSRI), Ishurdi, Pabna during the period from January 2009 to December 2009 to regenerate plants through micropropagation technique using selected explants of sugarcane. In this experiment shoot tip, leaf segment and leaf roll section explants of three sugarcane varieties (Isd 16, Isd 35 and Isd 36) were cultured on shoot inducing MS media with four combinations of NAA and Kn (NAA2.5Kn0.5, NAA5.0Kn0.5, NAA7.5Kn0.5 and NAA10.0Kn0.5 mg/l) to regenerate plants. The proliferated shoots were multiplied on liquid MS media with five combinations of BAP and Kn (BAP0.25Kn0.25, BAP0.5Kn0.25, BAP0.5Kn0.5, BAP1.0Kn0.5 and BAP1.0Kn1.0 mg/l) and further transferred to root inducing MS media fortified with six different concentrations of NAA (1.0, 2.0, 3.0, 4.0, 5.0 and 6.0 mg/l) for adventitious root formation to raise full-fledged plantlets. The leaf roll section explant of variety Isd 35 cultured on MS medium containing hormonal combination of 7.5 mg/l NAA + 0.5 mg/l Kn produced the highest percentage (83.33%) of shoot regeneration. The number of shoots per explant was also found highest (10.23) in the same explant of same variety with the same hormonal combination. The highest multiplication rate (4.64) was obtained from the liquid MS medium containing hormonal combination of 1.0 mg/l BAP + 0.5 mg/l Kn in the variety Isd 35. The MS medium containing 5.0 mg/l NAA showed better performance for adventitious root induction to raise full-fledged plantlets in all the varieties within nine days of inoculation.Â Â
MicroRNAs: new biomarker for diagnosis, prognosis, therapy prediction and therapeutic tools for acute lymphoblastic leukemia
Authors: A Gobran M. Sc Eman , NasrM Nasr PhD Ghada , Y Nasr PhD Mohamed , I Nasr PhD Mahmoud 
Published: February 2021

Back ground: MicroRNA (miRNA) was originally discovered in Caenorhabditis elegans by Victor Ambrose in 1993. It was predicted that miRNA account for 1-6% of the human genome and regulated at least 33% of protein-coding genes. Recently, 945 distinct miRNAs molecules have been identified within the human genome. It has been associated with the pathogenesis, progression and prognosis of different diseases, such as leukemia. MiR-181 family is one of those miRNA families, which generally expressed in 70 species and various human cancers.Objective: Assessment of mir-181a and LDH as promising co-biomarkers in order to provide additional information influence decisions about treatment sequentially to improve health outcomes of ALL in the Egyptian children.Patients and methods: This study was conducted on 100 children; 50 with ALL (38 males and 12 females) as ALL group. Other 50 healthy age and sex matched children were collected randomly as control group. Serum lactate dehydrogenase (LDH) and miRNA-181a were evaluated for all participants.Results: The results showed that there was a statistical significant difference between ALL and control groups regarding both molecular and biochemical indications of mir-181a and LDH were about almost five time as the control value, (P = 0.001). The ROC curve analysis revealed that the studied LDH and mir-181a markers were highly sensitive, highly specific and highly accurate test in the differentiation between the two studied ALL and control groups, with cutoff: ALL if mir-181a > 2.071, ALL if LDH > 0.307 respectively.Conclusion: MiRNA-181a and LDH can be used as co-biomarkers for ALL and might be beneficial in early diagnosis.Â Â
Comparing Fuzzy rule-based and fractional Open Circuit Voltage MPPT techniques in a fuel cell stack
Authors: N. Luta Doudou , K. Raji Atanda 
Published: February 2021

The concept of power tracking was at first applied to renewable power systems and especially those based on solar and wind to extract as much power as possible from them. Both types of power systems operate on the principle of converting either solar or wind into electricity. Thus, their output power is direct dependent on the solar radiation for solar power systems and on the wind speed for wind generators. To maintain efficient system operations, the output power of these power systems is optimized through maximum power tracking techniques. In the similar vein, fuel cell stacks display nonlinear output powers resulting from internal limitations and operating parameters such as tem-perature, hydrogen and oxygen partial pressures and humidity levels, etc., leading to a reduced system performance. It is critical to extract as much power as possible from the stack, thus, to prevent also an excessive fuel use. To ensure that, the power converter interfaced to the stack must be able to self-adjust its parameters continuously, hence modifying its voltage and current depending upon the maximum power point position. Diverse techniques are utilized to extract maximum power from the fuel-cell stack. In this paper, a fractional open circuit voltage and fuzzy rule based maximum power tracking techniques are considered and compared. The proposed system consists of a 50 kW Proton Exchange Membrane fuel cell interfaced to a DC-to-DC boost converter. The converter is designed to deliver 1.2 kV from 625 V input voltage. The simulation is carried out under Matlab/Simulink environment.
Development of a speech controlled water tap and fan system using linear predictive coefficient for feature extraction
Authors: S. Okomba Nnamdi , O. Esan Adebimpe , Omodunbi Bolaji , A. Adeyanju Ibrahim , A. Bashir Sulaimon 
Published: February 2021

Automatic device control is of great assistance in different electronic application areas that will aid human endeavors. Traditionally, fan and water pump system used in many homes are controlled by using manual process. This is a time consuming and difficult procedure, for the elderly, and handicap persons. In this view, this paper presents a microcontroller based fan and water pump control system using speech recognition. The system has a PIC16F628A microcontroller activated by a speech recognizer, then triggers control to a DC motor which set the water tap or the fan in motion. The Spoken words chosen for recognition are ON and OFF and the speech samples were extracted with Linear Predictive Coefficient (LPC) Feature extraction technique and after experimenting with the developed system, the result indicates the device is of good performance. We intend to increase the complexity of this work by adding specific sensors that will automatically switch off the fan at specified room temperature, and turn off the water tap at the fill of a container.Â Â
Development and thermal modeling of an induction machine
Authors: Stephen Ejiofor Oti , Justin Ugwu , Damian Benneth Nnadi , Uche Ogbuefi 
Published: February 2021

In induction machines, the major concern is the temperature rise since it determines the maximum loading, in an attempt to avoid insula-tion deterioration and eventual loss of motor life. The effect of excessive heat in the motor stator and rotor windings and the stator mag-netic circuit can degrade the developed performance of the machine and also affect the motor loading and life span if not dispensed properly. This research work examines the thermal model for estimating the stator and rotor temperatures in cage induction motor. A state-variable model of the induction is used. The twin-axis stator reference frame is used to model the motorâ€™s electrical behavior, because physical measurements are made in this reference frame. The thermal model is derived by considering the power dissipation, heat transfer and rate of temperature rise in the stator and rotor. The non-linear equations for electrical behavior of the motor and the thermal state equations for the stator and the rotor are solved using the MATLAB/Simulink blocks. This is to give room for the determination of the temperature of the stator and rotor windings inside the induction machine so as to evaluate the thermal stability of the induction motor and to check whether the insulation of the copper windings is sufficient at different operating conditions. It was found out from the thermal model analysis that the temperature of the stator and rotor windings increases due to stator and rotor copper losses which depend on the stator current. As the stator current is increased by increasing the torque, the temperature of each element is consequentially made to increase.Â Â
Effect of usage on the fatty acid composition and properties of neat palm oil, waste palm oil, and waste palm oil methyl ester
Authors: Omojola Awogbemi , Freddie Inambao , Emmanuel Idoko Onuh 
Published: February 2021

The need to find an environmentally friendly, renewable, and biodegradable fuel to reduce the growing dependence on fossil fuels and its attendant performance and emission inadequacies has increased research in biodiesel. Due to its low cost, availability, and a veritable means of waste disposal, waste vegetable oil from restaurants, waste fats from slaughterhouses, grease from wastewater treatment plants has gained prominence as biodiesel feedstock. This present effort compares the properties and fatty acid (FA) composition of neat palm oil (NPO), waste palm oil (WPO), and waste palm oil methyl ester (WPOME). WPO used to fry fish and chips (WPOFC), and waste palm oil used to fry sausage and chips (WPOSC) were collected at the point of disposal. The WPOFC and WPOSC were converted to WPOMEFC and WPOMESC, respectively, by transesterification and subjected to property determination and gas chromatography-mass spectrometer analysis. The characterization showed that the ratio of saturated FA to unsaturated FA changed from 19.64 %:80.36 % for NPO, to 37.67 %:62.33 % for WPOFC, 54.75 %:45.25 % for WPOSC, 30.43 %:69.58 % for WPOMEFC and 16.2 %:83.8 % for WPOMESC. These outcomes can be attributed to the effect of repeated heating and cooling during frying, contamination from moisture, food fried, and the transesterification reaction.Â Â
Analysis influence factors of domination, competency and interpersonal skill in the stakeholder interaction to infrastructure project success
Authors: Bayuaji Sanggoro Heru , Widyaningsih Nunung , P. K. Bintoro Bambang 
Published: February 2021

Project is picture of interaction model from various interests in social communication among the stakeholders. Stakeholders interaction factors can be influenced by domination and competencies beside their interpersonal skills. This research based on samples of respondents from East Java and West Sumatra provinces, Indonesia, which have similar social behavior and socio-cultural strength. Subject of research focused on three main projectâ€™s stakeholders, which will be analyzed by partial least square-structural equation model (PLS-SEM). The result of analysis shows that domination factor has the greatest influence to infrastructures project implementation. It means that influence of feudalism cultural heritage remain affecting to local people character and work culture. However, respondents from East Java consider competency as a significant variable which influences the infrastructure project success. West Sumatera respondents are the opposite, where competency is not a significant variable to the project success directly. Meanwhile, interpersonal skill can be good mediation variable for domination and competency to the project success in the West Sumatra, but it is not good enough to mediate domination to project success in the East Java. Thus, it can be concluded that West Sumatra respondents have a more feudal interaction style than stakeholders in East Java.Â Â
Industrial revolution 4.0 and the development of accounting information system: an imaginary dialogue
Authors: Ganis Sukoharsono Eko 
Published: February 2021

The paper is an imaginary dialogue on industrial revolution 4.0 (IR4.0) and the development of accounting information system. It explicates a thought of changing on accounting information system in the era of industry 4.0. The imaginary dialogue is between Accountant and Industrialist, both are concerned on the movement of industry 4.0 and accounting information system approach. Its aim is to explore the connection between IR4.0 and the development of AIS. IR4.0 characterized by Interoperability, Virtualization, Decentralization, Real Time Capability, Service Orientation, and Modularity significantly contributes the accuracy and timeliness of accounting information and the quality of AIS.Â Â