bluuebunny/crossref_metadata_2025_split huggingface dataset:
Reducing the Mutual Coupling of Cylindrical Circular Microstrip Antennas (CCMAs) Array Using EBG Structure
Authors: Areebi Nabeel Abbas 
Published: January 2023

A theoretical study to design a conformal microstrip antennas was introduced in this work. Conformal microstrip antennas define antennas which can be conformed to a certain shape or to any curved surface. It is used in high-speed trains, aircraft, defense and navigation systems, landing gear and various communications systems, as well as in body wearable. Conformal antennas have some advantages such as a wider-angle coverage compared to flat antennas and low radar cross-sectional (RCS) and they are suitable for using in Radome. The main disadvantage of these antennas is the narrow bandwidth. The FDTD method is extremely useful in simulating complicated structures because it allows for direct integration of Maxwell's equations depending on time. The 1x2 cylindrical circular microstrip antennas array is designed and simulated vertically via Finite Difference Time Domain (FDTD) method where can directive antenna be achieved through antennas array design. Mutual coupling between the antennas in the array and the different separation between them were studied. The circular patch is excited by a probe feed method for several reasons including providing less spurious radiation from the probe current, in addition to the simplicity in theoretical engineering installation and practical manufacturing. It is well known that the values of the coupling are decreased as the distance separation increased. Cylindrical circular microstrip antenna with resonant frequency operating is 3.5GHz for mode, several parameters like return loss, band width, and input impedance are calculated. Also, for isolated coupling, mutual coupling coefficients, directivity gain, for different separations between the centers of the two adjacent circular patches in terms the wave length operating are calculated. Moreover, the electromagnetic band gap EBG structure is used for reducing the mutual coupling created by the surface waves in order to enhance the antenna's performance in an array has become smaller than before. The proposed EBG is a three triangular-shape equal sides metallic structure, utilizing the inter-element spacing in an array. The less value of for the spacing between the two centers of patches is . BW percentage increased to 34.3% and the directivity is enhanced also. Additionally, simulations were done using MATLAB 2017b.
Kinetic and Theoretical Study of Removal Gentian Violet from Aqueous Solution Using Stachy Plant
Authors: Mahmood Zhahraa A. , Farhan Ahlam M , Kadhim Nafeesa J , Hade Muna S 
Published: January 2023

The main parameters and methods influencing the removal of Gentian Violet (GV) dye from aqueous media were investigated using a stachy plant in this study. The surface of the stachy plant was determined using FTIR spectra. Adsorption is influenced by the adsorbent's characteristic groups. The research took into account the usual conditions for GV dye adsorption by the stachy plant, such as the impact of contact time. Mass dosage , after 0.3 g the amount of adsorbed dye declines. Study pH and ionic strength, the results obtained showed that at pH 3 the largest adsorption of (GV) was seen, while at pH 9, the lowest adsorption was observed at 298 K, the adsorption kinetics and equilibrium constants were achieved, and the equilibrium data was fitted using the Langmuir, Freundlich, and Temkin models. The pseudo-first-order and pseudo-second-order kinetic models were used to investigate the adsorption process of gentian violet. The adsorption kinetics was discovered to be governed by a pseudo-second-order kinetic model with a determination coefficient (R2) of 0. 0.9943. Study the theoretical electrostatics of Gentian Violet dye was measured and plotted as a 2D and 3D contour and the program hyperchem-8.07 was used for semi-empirical and molecular mechanic calculations in the gas phase to estimate the total energy.
Degradation of Indigo Dye Using Quantum Mechanical Calculations
Authors: Mohammed Halla T. , Kamil Ahmed M. , Abduljalil Hayder M. , Ali Drea Abbas A- , Al-Seady Mohammed A. 
Published: January 2023

The semiempirical (PM3) and DFT quantum mechanical methods were used to investigate the theoretical degradation of Indigo dye. The chemical reactivity of the Indigo dye was evaluated by comparing the potential energy stability of the mean bonds. Seven transition states were suggested and studied to estimate the actually starting step of the degradation reaction. The bond length and bond angle calculations indicate that the best active site in the Indigo dye molecule is at C10=C11. The most possible transition states are examined for all suggested paths of Indigo dye degradation predicated on zero-point energy and imaginary frequency. The first starting step of the reaction mechanism is proposed. The change in enthalpy, Gibbs free energy and change in entropy of the overall reaction are equal to -548268.223 kcal/mol, 30831.951 kcal/mol and 48.552 cal/mol.deg, respectively. The activation energy is 46176.405 kcal/mol. The reaction rate is equal to .
Spectrophotometric Determination of Micro Amount of Chromium (III) Using Sodium 4-((4,5-diphenyl-imidazol-2-yl)diazenyl)-3-hydroxynaphthalene-1-sulfonate in the Presence of Surfactant, Study of Thermodynamic Functions and Their Analytical Applications
Authors: Abdul Ameer Hawraa Abdul Hadi , Hussain Alaa Frak 
Published: January 2023

Using sodium4-((4,5-diphenyl-imidazol-2-yl)diazenyl)-3-hydroxynaphthalene-1-sulfonate (SDPIHN) as a chromogenic reagent in presence of non-ionic surfactant (Triton x-100) to estimate the chromium(III) ion if the wavelength of this reagent 463 nm to form a dark greenish-brown complex in wavelength 586 nm at pH=10,the complex was stable for longer than 24 hours. Beer's low, molar absorptivity 0.244×104L.mol-1.cm-1, and Sandal's sensitivity 0.021 µg/cm2 are all observed in the concentration range 1-11 µg/mL. The limits of detection (LOD) and limit of quantification (LOQ), respectively, were 0.117 µg/mL and 0.385µg/mL. (mole ratio technique, job's method) were employed to investigate the stoichiometry of complexes, and both methods revealed that the metal to reagent ratio is equal 1:3.The absorption impact value of the reagent concentration, surfactant concentration, pH, reaction duration, temperature, addition sequences, ionic strength, masking agent, and the influence of many parameters such as affect cations and anions, among others. The influence of temperature on the reaction, which was referred to as an exothermic reaction, was also taken into account while calculating thermodynamic functions. Researchers investigated some of the complex solid's physical properties, such as solubility, molar conductivity, and melting point, as part of its development. UV-visible rays were used to investigate the chromium complex, while Relative Standard Deviation (RSD%) and Relative Error (E %) were used to assess the precision and accuracy of the novel method.
Eco-Friendly Synthesized of CuO Nanoparticles Using Anchusa strigosa L. Flowers and Study its Adsorption Activity
Authors: Khit Safaa Ali , Kareem Eman Talib , Shaheed Ihsan Mahdi 
Published: January 2023

Environmentally friendly copper oxide nanoparticles (CuO NPs) were prepared with a green synthesis route via Anchusa strigosa L. Flowers extract. These nanoparticles were further characterized by FTIR, XRD and SEM techniques. Removing of Gongo red from water was applied successfully by using synthesized CuO NPs which used as an adsorbent material. It was validated that the CuO NPs eliminate Congo red by means of adsorption, and the best efficiency of adsorption was gained at pH (3). The maximum adsorption capacity of CuO NPs for Congo red was observed at (35) mg/g. The equilibrium information for adsorption have been outfitted to the Langmuir, Freundlich, Temkin and Halsey adsorption isotherm types. The temperature thermodynamic parameters like ΔG°, ΔH° and ΔS° have been calculated.
An evaluation of waste and well water quality for agriculture production around Erbil city, Iraq
Authors: Youni Abdulqader M. , Darwesh Dlshad A. 
Published: January 2023

Erbil city is located in the northern Iraq with a population of over one million people. Due to water crises farmers usually use wastewater and well water for the agricultural production. In this study six stations were designed to sample waste water and three from well water to define waste water and ground water characteristics. In this study, Residual Na+ Carbonate, Mg++ hazard, salinity hazard, Kelley index, %sodium, total hardness, permeability index, potential salinity, sodium adsorption ratio, and Irrigation Water Quality Index (IWQI) were determined. The order of average cation concentrations in water was Mg2+> Ca2+ > Na+ > K+. While the proportion of main anions in water were HCO3 >SO4 > Cl. The highest concentrations of Ca2+, Mg2+ and Na+ were found in well water, while the highest concentration of K+ was found in wastewater. The maximum concentration of HCO3 and Cl recorded in well water, while the highest concentration SO4 recorded in wastewater. Moreover, the order of trace elements was Pb > Al > Fe > Cd > As > Mn >Cr > Ag > Ni. Keeping in mind metal concentration set by US EPA and FAO (1999) and (1994) guidelines the levels of Pb, Al, Fe, Mn, Cr, Ag and Ni in the waste and well water were within the admissible limitations for irrigation schemes. Moreover, limitations of As and Cd were beyond permissible limitation need to be reduced. The IWQI ranged from 88.92 to 95.09 in the waste water samples. Overall assessment reveals that cultivated agriculture plants were secured from toxic compounds.
Effective Feature Selection in Speech Emotion RecognitionSystems using Generative Adversarial Networks
Authors: Shilandari Arash , marvi hossein , Hadjiabdolhamid negin 
Published: January 2023

Abstract
Thus far, it has been unknown whether feature selection methods succeed in increasing the efficiency of speech-emotion recognition systems. This article discusses and evaluates feature selection for data augmentation purposes in a speech emotion recognition system. This study performed the experiments using Python and on four common databases: EMODB,eNTERFACE05, SAVEE, and IEMOCAP. Data analysis was conducted on all four databases for five emotions: sadness, fear, anger, happiness, andneutral. A support vector machine was used to classify emotions. We also used a generative adversarial network to augment data and two feature selection networks, Fisher and Linear Discriminant Analysisalgorithms. In two steps and with the feedback from the classification network, we could bring the speech emotion recognition to an optimal point in sample number and feature vector dimensions. The results showed that using Linear Discriminant Analysis and the Fisher method simultaneously in the generative adversarial networks can remove redundant and irrelevant features while preserving features with important emotional information for classification. The results obtained from the proposed method were compared with that of recent studies. The proposed method was able to achieve 86.32% accuracy in the Berlin Database of Emotional Speech.
Exploring the role of gut microbiota dysbiosis in gout pathogenesis: a systematic review
Authors: Shirvani-Rad Salman , Khatibzade-Nasari Niloufar , Ejtahed Hanieh-Sadat , Larijani Bagher 
Published: January 2023

Abstract
Objective
Different mechanisms play role in the pathogenesis of gout and gut microbiota is believed to be one of these factors. The main goal of this systematic review is to summarize evidence regarding changes in gut microbiota composition in gout disease and uncover underlying mechanisms.
Methods
A comprehensive search was conducted on PubMed, Web of Science and Scopus databases up to October 2021. Animal studies and human observational studies including case-control, cross-sectional, and cohorts assessing associations between the gut microbiota composition and gout were included. The quality of the included human and animal studies has been evaluated using the Newcastle–Ottawa Quality Assessment scale (NOS) and the SYRCLE's risk of bias tool, respectively.
Results
15 studies from 274 recorded studies were included in this systematic review. 10 studies on human and 5 on animals. Increase in frequency of Alistipes and decreased Enterobacteriaceae lead to changes of enzyme level in purine metabolism and aggravates gout condition. Moreover, rise of Phascolarctobacterium and Bacteroides play role in gout through enzyme modulation. Butyrate-producing bacteria such as Faecalibacterium, prausnitzii, Oscillibacter, Butyricicoccus and Bifidobacterium revealed an increase in healthy controls compared to gout patients which points to the possible underlying role of short-chain fatty acids (SCFAs) leading to both anti-inflammatory advantages and promoting intestinal barrier for host. Lipopolysaccharides (LPS)-releasing bacteria, Enterobacteriaceae, Prevotella and Bacteroides, also impact on gout disease by stimulating the innate immune system.
Conclusion
Exploring gut microbiota dysbiosis in gout disease and the underlying mechanisms could make a novel insight for microbiota-modulating therapies.
Evolutionary Pathways of Ecosystem Literature in Organization and Management Studies
Authors: Coccia Mario , Ghazinoori Soroush , Roshani Saeed 
Published: January 2023

Abstract

Literature shows manifold concepts of the ecosystem. A critical issue in social studies of science is that these concepts include different construct’s core elements. Recent reviews have set out to clarify the conceptual boundaries between ecosystem concepts. However, there are many inconsistencies to clarify the interaction of different concepts that have supported their scientific evolution to help scholars in scientific investigations and firms to achieve and sustain competitive advantage and other goals. This study endeavors to advance the understanding of the evolutionary pathways of different concepts of the ecosystem. In particular, here, we explore the scientific dynamics of the concept of ecosystem, using author co-citation analysis to clarify the interaction between different concepts in social communities of science. The findings show systematical differences in the ecosystem types considering their conceptual basis and goals. Especially, findings suggest that the current concept of ecosystem is being socially constructed based on different domains of knowledge of scholars and evolves from a master community started with the work by Moore in 2003, generating four evolutionary pathways with specific characteristics directed to: Entrepreneurial ecosystem, Innovation ecosystem, Service ecosystem, and the Platform ecosystem. Results seem to suggest fragmented and contradictory views of the concept of ecosystem, because of different evolution based on social and scientific interactions of scholars and their communities in shaping the dynamics of science in these fields of research. The splitting and merging of different social and scientific communities in an international collaboration network do not converge towards a consistent and unique perspective of the concept of ecosystem for a general analysis because of initial origins based on conceptual differences, different approaches of analysis and purposes of research and consequential various evolutionary pathways in complex scientific interactions between communities. Hence, these results clarify the science dynamics of the concepts of ecosystem to explain different applications in theoretical and practical contexts of organization and management studies.
Co-design of a Virtual Reality Cognitive Remediation Program for Depression (bWell-D) With Patient End Users and Clinicians: Qualitative Interview Study Among Patients and Clinicians
Authors: Hernandez Hernandez Maria Elena , Michalak Erin , Choudhury Nusrat , Hewko Mark , Torres Ivan , Menon Mahesh , Lam Raymond W , Chakrabarty Trisha 
Published: January 2023

Background
Major depressive disorder (MDD) is the leading cause of global disability; however, the existing treatments do not always address cognitive dysfunction—a core feature of MDD. Immersive virtual reality (VR) has emerged as a promising modality to enhance the real-world effectiveness of cognitive remediation.

Objective
This study aimed to develop the first prototype VR cognitive remediation program for MDD (“bWell-D”). This study gathered qualitative data from end users early in the design process to enhance its efficacy and feasibility in clinical settings.

Methods
Semistructured end-user interviews were conducted remotely (n=15 patients and n=12 clinicians), assessing the participants’ perceptions and goals for a VR cognitive remediation program. Video samples of bWell-D were also shared to obtain feedback regarding the program. The interviews were transcribed, coded, and analyzed via thematic analysis.

Results
End users showed an optimistic outlook toward VR as a treatment modality, and perceived it as a novel approach with the potential of having multiple applications. The participants expressed a need for an engaging VR treatment that included realistic and multisensorial settings and activities, as well as customizable features. Some skepticism regarding its effectiveness was also reported, especially when the real-world applications of the practiced skills were not made explicit, as well as some concerns regarding equipment accessibility. A home-based or hybrid (ie, home and clinic) treatment modality was preferred.

Conclusions
Patients and clinicians considered bWell-D interesting, acceptable, and potentially feasible, and provided suggestions to enhance its real-world applicability. The inclusion of end-user feedback is encouraged when developing future VR programs for clinical purposes.
Ekološki prihvatljivo rešenje postrojenja za mehaničko-biološki tretman otpada u Kraljevu
Authors: Lišanin Radmila , Lalović Čedo 
Published: January 2023

Metode i postupci upravljanja komunalnim otpadom u Srbiji baziraju se na njegovom deponovanju.Ovakav način upravljanja otpadom u budućnosti će predstavljati značajan ekološki problem prvenstveno zbog proizvodnje gasova sa efektom staklene bašte i upravljanja energetskim resursima.Najveći deo ovako deponovanog komunalnog čvrstog otpada sastoji se od biorazgradivih komponenti. Zbog toga se u razvijenim ekonomijama sveta uvode nove tehnologije za upravljanje komunalnim otpadom koje uključuju savremenu reciklažu, kompostiranje i biološki tretman anaerobnom digestijom.U ovom radu analizirani su tehno-ekonomski uslovi kao i mogućnosti izgradnje MBT postrojenja koje bi predstavljalo rešenje složenog problema upravljanja otpadom u gradu Kraljevu. Posebno je ukazano na prednosti koje MBT postrojenja donose u oblasti zaštite životne sredine i racionalnog trošenja prirodnih resursa. Osnovna ideja ovog rada je da MBT postrojenje istovremeno realizuje proizvodnju energije i da se njegovom izgradnjom rešava štetan ekološki efekat otpada u gradu Kraljevu. Da bi se došlo do kvalitenog idejnog rešenja koje bi moglo da odgovori izazovima upravljanja otpadom u Kraljevu, sprovedena je detaljna analiza dobre prakse u primerima postojećih rešenja postrojenja za mehaničko - biološki tretman komunalnog otpada.Zbog specifične dinamike generisanja otpada i njegove morfološke kompozicije za grad Kraljevo predloženo je i idejno rešenje ovakvog MBT postrojenja.Po svojoj koncepciji i kapacitetu ovim rešenjem u potpunosti bi se zadovoljile potrebe grada Kraljeva. Na osnovu ekonomske analize ove investicije zaključeno je da bi realizacija ovog objekta sa svojim energetskim, ekonomskim i ekološkim dobicima bila ekološki održiva ideja. Takvo rešenje imalo bi značajan uticaj na poboljšanje životne sredine i upravljanje strateškim resursima u gradu Kraljevu i šire.
Persepsi Pemustaka Terhadap Online Public Access Catalogue (OPAC) Sebagai Alat Penelusuran Bahan Pustaka di UPT Perpustakaan Universitas Negeri Makassar
Authors: Raodhatul  , Ramadayanti Ramadayanti , Marni Marni 
Published: January 2023

The purpose of this study is to determine the perception of users towards the Online Public Access Catalog (OPAC) and the obstacles faced by users in using the Online Public Access Catalogue (OPAC) at the UPT Library of Makassar State University. This research is descriptive with a qualitative approach carried out by conducting observations, interviews, and documentation to obtain data related to the research. The informants in this study consisted of 3 librarians and 7 users. The results of this study show that OPAC-INLISLite at the UPT Library of Makassar State University is good, but users still do not understand how to operate the Online Public Access Catalogue (OPAC) as a tool for searching library materials, due to the lack of socialization from librarians so that many users directly visit the bookshelf to get the collection they need. The obstacles faced by users are that the network is not supportive causes the search for library materials to be hampered, the user's lack of understanding of search techniques so that the collection sought is limited and librarians have not fully input books into the Online Public Access Catalogue (OPAC).
Abstrak
Tujuan dilakukannya penelitian ini adalah untuk mengetahui persepsi pemustaka terhadap Online Public Access Cataloge (OPAC) serta kendala yang di hadapi oleh pemustaka dalam menggunakan Online Public Access Catalogue (OPAC) di UPT Perpustakaan Universitas Negeri Makassar. Penelitian ini bersifat deskriptif dengan pendekatan kualitatif yang dilakukan dengan melakukan observasi, wawancara, dan dokumentasi untuk mendapatkan data-data yang berkaitan dengan penelitian. Informan dalam penelitian ini terdiri dari 3 pustakawan dan 7 pemustaka. Hasil penelitian ini menunjukan bahwa OPAC-INLISLite di UPT Perpustakaan Universitas Negeri Makassar sudah bagus, akan tetapi pemustaka masih kurang memahami cara mengoperasikan Online Public Access Catalogue (OPAC) sebagai alat penelusuran bahan pustaka, karena kurangnya sosialisasi dari pustakawan sehingga banyak pemustaka yang langsung mengunjungi ke rak buku untuk mendapatkan koleksi yang mereka butuhkan. Adapun kendala yang di hadapi pemustaka yaitu jaringan yang kurang mendukung menyebabkan penelusuran bahan pustaka terhambat, kurangnya pemahaman pemustaka tentang teknik penelusuran sehingga koleksi yang dicari terbatas dan pustakawan belum sepenuhnya menginput buku ke dalam Online Public Access Catalogue (OPAC).
مرجعية الذائقة العربية في فهم الخطاب الاستشراقي (محمود شاكر أنموذجاً)
Authors: Hussein Ibrahim Salih 
Published: January 2023

إنّ (استخلاص الذائقة العربية الأصلية) يمثل أحد أهم ركائز الخطاب الانعكاسي في مشروع العلامة محمود محمد شاكر الفكري ذلك المشروع الفريد الذي واجه به أبو فهر الخطر الاستشراقي على ثقافتنا وآدابنا وتأريخنا، إذ تشغل فكرة التذوق الأدبي مساحة واسعة في فكر محمود شاكر فهو يطرح هذه الفكرة لكون التذوق الأصيل محكاً خطيراً به نستطيع أن نتبيّن أهلية من يخوض في ثقافة الأمة وتراثها من المستشرقين أولاً، وممن يتبعهم من العرب، وذلك أن الثقافة العربية تواجه خطراً من داخل أسوارها لا من خارجها فحسب.
إن قضية الشك في الشعر الجاهلي كان ولم يزل من أسخن القضايا وأخطرها على الهوية العربية، فكان أن واجهها العلامة محمود شاكر على أنها تمس كيان الأمة الاسلامية، وأنها تتضمن شكاً بالقرآن الكريم وثوابت الاسلام أيضاً، ولهذا تسلّح خطابه بقضية الأصالة في محاولة منه للتصدي لهذه الفكرة التي أخذت تتغلغل إلى جسد الثقافة العربية المعاصرة، وإلا فقد تبنته أقلام عربية سارت على خطا المستشرقين.
إن الأمة تواجه في كل عصر حملة تهدد هويتها وتحاول زعزعة ثوابتها، ولهذا كان الخطر الاستشراقي على كيان الأمة تُذكر أبا فهر بالخطر الشعوبي في العصور القديمة، ولعل هذا يفسر لنا اقتراب مسألة التذوق عند أبي فهر من فكرة (البيان) عند الجاحظ، وعندئذٍ فهو يستدعيها ويدعو في الوقت ذاتهِ إلى أن نتبناها لكي نستعيد بها ذاتنا المغيّبة.