ARO. The Scientific Journal of Koya University最新文献

Size Reduction and Harmonics Suppression in Microwave Power Dividers 微波功率分压器的尺寸减小与谐波抑制

ARO. The Scientific Journal of Koya University Pub Date : 2023-11-10 DOI: 10.14500/aro.11385

Sobhan Roshani, None Salah I. Yahya, Yazeed Y. Ghadi, Saeed Roshani, Fariborz Parandin, Behnam D. Yaghouti

{"title":"Size Reduction and Harmonics Suppression in Microwave Power Dividers","authors":"Sobhan Roshani, None Salah I. Yahya, Yazeed Y. Ghadi, Saeed Roshani, Fariborz Parandin, Behnam D. Yaghouti","doi":"10.14500/aro.11385","DOIUrl":"https://doi.org/10.14500/aro.11385","url":null,"abstract":"In this paper, several types of microstrip power divider are studied and compared in terms of harmonics suppression and size reductions. The importance of this research lies in the fact that power dividers are critical components in various communication systems, and their performance directly affects the overall system efficiency. The conventional structure of the power divider has an acceptable performance at operating frequency in terms of excellent output ports isolation, low insertion loss, and high return loss, but occupies large size and passes unwanted signals at higher frequencies along with desired signal without any suppression. Harmonics are popular distortion and has different distortion impacts in many different facilities. Recently, several techniques are introduced to overcome these drawbacks. Applied open stubs, applied resonators, lumped reactive components such as capacitors and inductors, coupled lines, defected ground structure (DGS), and electronic band gaps are common methods, which are widely used to overcome these drawbacks. Finally, the study results show that the resonator-based power dividers and coupled-line-based power dividers have good performances in terms of size reduction and harmonic suppression but increase insertion loss parameter. Furthermore, the lumped reactive component-based power dividers and applied DGS and electromagnetic bandgap cells suppress unwanted harmonics, but they need extra process to fabrication, which is undesirable. Moreover, the open-stub-based power dividers have moderate performance with simple structure, but size reduction and harmonics suppression are not so superior in this method.","PeriodicalId":8665,"journal":{"name":"ARO. The Scientific Journal of Koya University","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135186500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigating the Role of Metoclopramide and Hyoscine-N-Butyl Bromide in Colon Motility 甲氧氯普胺和海莨菪碱-正丁基溴在结肠运动中的作用

ARO. The Scientific Journal of Koya University Pub Date : 2023-11-10 DOI: 10.14500/aro.11375

Sleman Y. Omar, Dyari M. Mamand, Rebaz A. Omer, Rzgar F. Rashid, Musher I. Salih

{"title":"Investigating the Role of Metoclopramide and Hyoscine-N-Butyl Bromide in Colon Motility","authors":"Sleman Y. Omar, Dyari M. Mamand, Rebaz A. Omer, Rzgar F. Rashid, Musher I. Salih","doi":"10.14500/aro.11375","DOIUrl":"https://doi.org/10.14500/aro.11375","url":null,"abstract":"Metoclopramide is a treatment for gastroenteritis accompanied by vomiting. Hyoscine-n-butyl bromide as an anticholinergic agent causes inhibition of the acetylcholine (Ach) by acting on muscarinic receptors. The study aims to ascertain how metoclopramide affects Ach-induced cortical motility and also investigates the effects of metoclopramide alone and in combination with hyoscine-n-butyl bromide drug effects on colon motility. In this study, 1 cm of colon tissue width was cut, 2 cm long strips were made, and both sides of the tissue were secured with surgical silk at both ends of isolated bath tissues of isolated organs with (1g) tension to the suspended instrument that recorded isometric contractions. Tissue fixation is followed by drug addiction: Ach, metoclopramide, and hyoscine-N-butyl bromide. The tissue was treated with metoclopramide and hyoscine-n-butyl bromide and excess Caine for 10 min. The results show changes in colon frequency, peak-to-peak, and amplitude levels for metoclopramide, hyoscine-N-butyl, and metoclopramide and hyoscine. Apaired T-test statistically analyzes the results. Metoclopramide by itself, as well as in combination with hyoscine-n-butyl bromide, increases colon motility and induces Ach release. In addition, an analysis of the physicochemical characteristics of hyoscine-n-butyl bromide and metoclopramide molecules is conducted. The study includes theoretical calculations of electronic parameters for both protonated and unprotonated forms of these molecules in both gaseous and aqueous environments. These results show the potential use of metoclopramide as a therapeutic option for gastroenteritis with vomiting, warranting additional study, and clinical evaluation. The research also reveals hyoscine-n-butyl bromide and metoclopramide’s molecular features by their physicochemical properties.","PeriodicalId":8665,"journal":{"name":"ARO. The Scientific Journal of Koya University","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135186777","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Local Anesthetic Activity of Lavandula angustifolia and Eugenia caryophyllata Essential Oils 薰衣草和石竹精油的局部麻醉活性研究

ARO. The Scientific Journal of Koya University Pub Date : 2023-11-10 DOI: 10.14500/aro.11426

Subasini Uthirapathy

引用次数: 0

Enhancing Upper Limb Prosthetic Control in Amputees Using Non-invasive EEG and EMG Signals with Machine Learning Techniques 利用无创脑电图和肌电图信号与机器学习技术增强截肢者上肢假肢控制

ARO. The Scientific Journal of Koya University Pub Date : 2023-10-30 DOI: 10.14500/aro.11269

Huda M. Radha, Alia K. Abdul Hassan, Ali H. Al-Timemy

{"title":"Enhancing Upper Limb Prosthetic Control in Amputees Using Non-invasive EEG and EMG Signals with Machine Learning Techniques","authors":"Huda M. Radha, Alia K. Abdul Hassan, Ali H. Al-Timemy","doi":"10.14500/aro.11269","DOIUrl":"https://doi.org/10.14500/aro.11269","url":null,"abstract":"Amputation of the upper limb significantly hinders the ability of patients to perform activities of daily living. To address this challenge, this paper introduces a novel approach that combines non-invasive methods, specifically Electroencephalography (EEG) and Electromyography (EMG) signals, with advanced machine learning techniques to recognize upper limb movements. The objective is to improve the control and functionality of prosthetic upper limbs through effective pattern recognition. The proposed methodology involves the fusion of EMG and EEG signals, which are processed using time-frequency domain feature extraction techniques. This enables the classification of seven distinct hand and wrist movements. The experiments conducted in this study utilized the Binary Grey Wolf Optimization (BGWO) algorithm to select optimal features for the proposed classification model. The results demonstrate promising outcomes, with an average classification accuracy of 93.6% for three amputees and five individuals with intact limbs. The accuracy achieved in classifying the seven types of hand and wrist movements further validates the effectiveness of the proposed approach. By offering a non-invasive and reliable means of recognizing upper limb movements, this research represents a significant step forward in biotechnical engineering for upper limb amputees. The findings hold considerable potential for enhancing the control and usability of prosthetic devices, ultimately contributing to the overall quality of life for individuals with upper limb amputations.","PeriodicalId":8665,"journal":{"name":"ARO. The Scientific Journal of Koya University","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136069740","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design and Study of a Nanocavity-based One-dimensional Photonic Crystal for Potential Applications in Refractive Index Sensing 基于纳米空腔的一维光子晶体在折射率传感中的应用研究

ARO. The Scientific Journal of Koya University Pub Date : 2023-10-09 DOI: 10.14500/aro.11298

Khalid N. Sediq, Fahmi F. Muhammadsharif, Simko O Ramadan, Shalaw Z. Sedeeq

{"title":"Design and Study of a Nanocavity-based One-dimensional Photonic Crystal for Potential Applications in Refractive Index Sensing","authors":"Khalid N. Sediq, Fahmi F. Muhammadsharif, Simko O Ramadan, Shalaw Z. Sedeeq","doi":"10.14500/aro.11298","DOIUrl":"https://doi.org/10.14500/aro.11298","url":null,"abstract":"Refractive index (RI) can be used to identify a particular substance and determine its purity and concentration. The RI of glucose solution with various concentrations can be determined using a distributed Bragg reflective (DBR) device containing a nanocavity. The optical property of the reflection spectrum produced by DBR is sensitive to the variation of the refractive index. In this study, a DBR with a cavity width of 220 nm, located in the middle of the device, is designed and used to sense the variation in the refractive index of glucose at different concentrations. The proposed design showed a sharp dip pattern within the reflection spectrum. The wavelength of the absorption peak was found to be sensitive to trivial variations in the refractive index of glucose solution. Results showed that the variation in the refractive index of glucose within the order of Δn = 0.02 has led to a noticeable shift in the absorption spectrum by Δλ = 2.6 nm. Furthermore, the sensitivity of the proposed device was found to be 130 nm/RIU which is considered high compared with those reported in the literature. Hence, the proposed structure can be a promising optical device for chemical ultrasensing applications.","PeriodicalId":8665,"journal":{"name":"ARO. The Scientific Journal of Koya University","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135142456","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Manufacturing and Evaluating of Indirect Solar Dryers 间接太阳能干燥机的制造与评价

ARO. The Scientific Journal of Koya University Pub Date : 2023-10-05 DOI: 10.14500/aro.11127

Dara K. Khidir

引用次数: 0

Evaluation of Radioactivity in Soil Sample from Al-Hadbaa Cement Plant in Nineveh Governorate, Iraq 伊拉克尼尼微省Al-Hadbaa水泥厂土壤样品放射性评价

ARO. The Scientific Journal of Koya University Pub Date : 2023-09-25 DOI: 10.14500/aro.11283

Laith A. Najam, Ali I. Yaseen

{"title":"Evaluation of Radioactivity in Soil Sample from Al-Hadbaa Cement Plant in Nineveh Governorate, Iraq","authors":"Laith A. Najam, Ali I. Yaseen","doi":"10.14500/aro.11283","DOIUrl":"https://doi.org/10.14500/aro.11283","url":null,"abstract":"The fundamental goal of this study is to measure the level of radioactivity in the soil of the area around Al-Hadbaa cement plant, also to evaluate the radiological hazard of radionuclide, gamma-spectroscopy with an HPGe detector with the crystal diameter of 70.6 mm and length of 70 mm has been used to estimate the specific activity of natural radionuclides 226Ra, 232Th, 40K, and artificial radionuclides 137Cs in the fifteen soil samples collected. The results show that the average concentration of specific activity of 226Ra, 232Th, 40K, and 137Cs was 11.17 ± 1.69, 13.38 ± 0.72, 158.36 ± 5.35 Bq/kg, and 1.52 ± 0.19 Bq/kg, respectively. The average specific activity of these radionuclides is discovered to be lower than the global average which is 33 Bq/kg for 226Ra, 30 Bq/kg for 232Th, and 400 Bq/kg for 40K. Radiological hazard indices are determined according to the activity concentration of the radionuclides in the area under study. The outcome of the radiological hazard index is within the globally recognized limit proposed by UNSCEAR which is 1000 μSv/y for annual effective dose and 290 × 10-6 for cancer risk, so it is possible to conclude that there are no radiological hazards as a result of radiation exposure to the workers working in the cement plant as well as the organisms living in the region.","PeriodicalId":8665,"journal":{"name":"ARO. The Scientific Journal of Koya University","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135769265","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Investigating and Studying the Modifications of Nano and Micro-sized Amorphous Materials Under the Influence of a High Energy Radiation 高能辐射作用下纳米和微米非晶材料的改性研究

ARO. The Scientific Journal of Koya University Pub Date : 2023-09-24 DOI: 10.14500/aro.11290

Mohammed F. Sabri

{"title":"Investigating and Studying the Modifications of Nano and Micro-sized Amorphous Materials Under the Influence of a High Energy Radiation","authors":"Mohammed F. Sabri","doi":"10.14500/aro.11290","DOIUrl":"https://doi.org/10.14500/aro.11290","url":null,"abstract":"This research explored the behavior of glass when bombarded by high-energy radiation, especially electron beams inside transmission electron microscopy (TEM). Six types of glasses are investigated under e-beam. The work is conducted using three types of TEMs of energies of 120, 200, and 300 keV. The findings show that these microscopies have a significant impact on the glass, as various observations were documented. Using a wide electron beam, morphology changes combined with bubble formation are observed in the glass. These changes are rounding and smoothening of glass edges and surfaces. In addition, the findings show that there is no material loss due to irradiation as confirmed by the energy dispersive X-ray spectroscopy. The results also show that high silica glass is very sensitive, while high boron glass is found to be less sensitive to irradiation. Using a smaller size electron beam, on the other hand, resulted in the fabrication of a nanoring/nanocrater in glass. The possible applications of this research can be in the protection and packaging of three-dimensional electronic equipment and nanoscale pattern formation through roughening of the external glass contour through phase separation and the opposite through local changing of a part of the glass through the pseudo-melting and the stability of loaded and un-loaded glasses to the irradiation. Furthermore, by generating a nanoring or a nanocrater through e-beam, the lithography process is successfully performed, as the effect of the electron beam is solely at the irradiation region, while the regions outside the e-beam remain unaffected","PeriodicalId":8665,"journal":{"name":"ARO. The Scientific Journal of Koya University","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135926137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Traffic Circulation Efficiency of Elliptical Roundabouts 椭圆环形交叉路口的交通流通效率

ARO. The Scientific Journal of Koya University Pub Date : 2023-09-20 DOI: 10.14500/aro.11150

Hardi S. Fathullah, Hirsh M. Majid, Chro H. Ahmed, Sulleyman H. Sourkan, Karzan S. Ismael, Balen Z. Abdulsamad

{"title":"Traffic Circulation Efficiency of Elliptical Roundabouts","authors":"Hardi S. Fathullah, Hirsh M. Majid, Chro H. Ahmed, Sulleyman H. Sourkan, Karzan S. Ismael, Balen Z. Abdulsamad","doi":"10.14500/aro.11150","DOIUrl":"https://doi.org/10.14500/aro.11150","url":null,"abstract":"This paper investigates the impact of geometry of central island of roundabout on operational performance in terms of delay and capacity measures. A roundabout with an elliptical central island having major and minor axes of 63 and 44m respectively was selected as a case study. Using SIDRA Intersection software two simulation models are developed while considering two geometric shapes of central island; one with an elliptical shape and the other with a circular shape. The peak traffic volume of each approach was assigned to both models as a preliminary simulation then twelve scenarios were generated by assigning identical lane volumes starting from a value that gave level of service A and increasing gradually to level of service F. In each scenario 100% of the volume assigned to an approach while the other was assigned with 75% of it and this process was reversed for every run. The results revealed that at high degree of saturation, the elliptical roundabout generally possessed a higher performance especially in term of delay and capacity compared to the circular roundabout. Furthermore, a parametric study was carried out through running eight more simulation scenarios to examine the impacts of heavy vehicle percentage (HV%) on the roundabout operational performance. The (HV %) started from 2% and increased to 12% with alternate approach virtual volume, and the results showed that performance of the elliptical roundabout was higher than the circular roundabout. However it was more susceptible to increase of HV% in term of control delay and capacity.","PeriodicalId":8665,"journal":{"name":"ARO. The Scientific Journal of Koya University","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136377414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Radon Activity Concentration Measurements in the Water Collected from the Lower Zab River in the Kurdistan Region of Iraq 伊拉克库尔德斯坦地区扎布河下游水氡活度浓度测定

ARO. The Scientific Journal of Koya University Pub Date : 2023-09-18 DOI: 10.14500/aro.11192

Jahfer M. Smail, Hiwa H. Azeez, Habeeb H. Mansour, Saddon T. Ahmad

引用次数: 0