Efficient analysis of metal and dielectric rods in rectangular waveguide with ferrite magnetized transversely

This is an Author's Accepted Manuscript of an article published in Zahra Bahrami, Asghar Keshtkar, Ayaz Ghorbani & Hector Esteban (2020) Efficient analysis of metal and dielectric rods in rectangular waveguide with ferrite magnetized transversely, Journal of Electromagnetic Waves and Applications, 34:2, 141-153 [copyright Taylor & Francis], available online at: http://www.tandfonline.com/10.1080/09205071.2019.1690589[EN] This paper presents a new analytical method based on mode matching technique for a waveguide full of anisotropic material with rods. It is proved that mode matching technique is applicable for the waveguide with anisotropic materials. The problem is considered as a 2D electromagnetic problem assuming no field variation normal to the waveguide length. Incident and scattered fields from circular cylinder rods in ferrite medium are expanded with cylindrical modes, and the fields in the waveguide ports are expanded using progressive and regressive modal summations. In both regions, extraordinary wave number is considered for the fields. Finally, the hybrid mode matching between guided and cylindrical modes is done by projecting continuity equations in the circular boundary containing the rod. The fast Fourier transform is used to solve the matching in the presented method. It is shown, that the new method runs faster than commercial software packages, with very good accuracy.Bahrami, Z.; Keshtkar, A.; Ghorbani, A.; Esteban González, H. (2020). Efficient analysis of metal and dielectric rods in rectangular waveguide with ferrite magnetized transversely. Journal of Electromagnetic Waves and Applications. 34(2):141-153. https://doi.org/10.1080/09205071.2019.1690589S141153342Bachiller, C., Gonzalez, H. E., Boria Esbert, V. E., Belenguer Martinez, A., & Morro, J. V. (2007). Efficient Technique for the Cascade Connection of Multiple Two-Port Scattering Matrices. IEEE Transactions on Microwave Theory and Techniques, 55(9), 1880-1886. doi:10.1109/tmtt.2007.904076Koshiba, M., & Suzuki, M. (1986). Finite-Element Analysis of H-Plane Waveguide Junction with Arbitrarily Shaped Ferrite Post. IEEE Transactions on Microwave Theory and Techniques, 34(1), 103-109. doi:10.1109/tmtt.1986.1133286Ise, K., & Koshiba, M. (1989). Equivalent circuits for dielectric posts in a rectangular waveguide. IEEE Transactions on Microwave Theory and Techniques, 37(11), 1823-1825. doi:10.1109/22.41054Ise, K., & Koshiba, M. (1990). Dielectric post resonances in a rectangular waveguide. IEE Proceedings H Microwaves, Antennas and Propagation, 137(1), 61. doi:10.1049/ip-h-2.1990.0011Auda, H. A., & Smith, C. E. (1990). The resonance method for evaluating the impedances of the equivalent network for dielectric posts in a rectangular waveguide. IEEE Transactions on Microwave Theory and Techniques, 38(11), 1595-1602. doi:10.1109/22.60004Diaz Caballero, E., Esteban, H., Belenguer, A., & Boria, V. (2012). Efficient Analysis of Substrate Integrated Waveguide Devices Using Hybrid Mode Matching Between Cylindrical and Guided Modes. IEEE Transactions on Microwave Theory and Techniques, 60(2), 232-243. doi:10.1109/tmtt.2011.2178424Nafe, A., & Shamim, A. (2015). An Integrable SIW Phase Shifter in a Partially Magnetized Ferrite LTCC Package. IEEE Transactions on Microwave Theory and Techniques, 63(7), 2264-2274. doi:10.1109/tmtt.2015.2436921Ghaffar, F. A., & Shamim, A. (2015). A Partially Magnetized Ferrite LTCC-Based SIW Phase Shifter for Phased Array Applications. IEEE Transactions on Magnetics, 51(6), 1-8. doi:10.1109/tmag.2015.2404303Ghiotto, A., Adhikari, S., & Wu, K. (2012). Ferrite-Loaded Substrate Integrated Waveguide Switch. IEEE Microwave and Wireless Components Letters, 22(3), 120-122. doi:10.1109/lmwc.2012.218385

Effect of competitive intelligence dimensions on effectiveness of marketing strategies: A path analysis approach

One of the features of new organizations is the accumulation of excessive knowledge on a competitive scale, so that the information enhancement in organizations and the need for their analysis and proper and logical use in organizational decisions within the last two decades has led to the emergence of a phenomenon called Competitive Intelligence. Competitive Intelligence is considered as a strategic management tool and also as one of the world fastest domains in business development. The objective of this article is to identify the impact rate and prioritization of the categories and components of competitive intelligence patterns together with the effectiveness of marketing strategies in order to increase awareness and provide a better recognition of operational and executive solutions. In this paper, after introducing a competitive intelligence pattern, we used a questionnaire to identify the pattern components impact on the effect of marketing strategies among the Food Industry staff in Sari who were selected by stratified random sampling. The statistical analysis has shown that quality differences, barriers to entry and price sensitivity components and also competitive rivalries category have had the greatest impact on the effectiveness of marketing strategies

Effect of competitive intelligence dimensions on effectiveness of marketing strategies: A path analysis approach

One of the features of new organizations is the accumulation of excessive knowledge on a competitive scale, so that the information enhancement in organizations and the need for their analysis and proper and logical use in organizational decisions within the last two decades has led to the emergence of a phenomenon called Competitive Intelligence. Competitive Intelligence is considered as a strategic management tool and also as one of the world fastest domains in business development. The objective of this article is to identify the impact rate and prioritization of the categories and components of competitive intelligence patterns together with the effectiveness of marketing strategies in order to increase awareness and provide a better recognition of operational and executive solutions. In this paper, after introducing a competitive intelligence pattern, we used a questionnaire to identify the pattern components impact on the effect of marketing strategies among the Food Industry staff in Sari who were selected by stratified random sampling. The statistical analysis has shown that quality differences, barriers to entry and price sensitivity components and also competitive rivalries category have had the greatest impact on the effectiveness of marketing strategies

A New Formula for Confirmation of Proper Endotracheal Tube Placement with Ultrasonography

Background Endotracheal intubation is an important procedure in critical care and emergency medicine settings. Optimal depth of the tube placement has been a serious concern because of several complications associated with its malposition. Objective: The aim of the current study was to find a new formula to estimate the proper endotracheal tube depth when using ultrasonography or lighted stylet device in order to increase the accuracy of determining Endotracheal tube (ETT) depth and decrease the side effects of ETT misplacement. Method: Patients older than 18 years of age admitted to Imam emergency department who needed tracheal intubation were included. Tube’s length at the angle of the mouth while the tube passed the suprasternal notch, ETT depth after insertion and the distance from ETT’s tip to carina were recorded. Ultrasonography and portable chest x-ray were used as tools for measuring these lengths. Results: A total number of 91 patients including 55 men and 36 women were eligible for inclusion in the study. Not placing the tube at proper depth was considered as failure of intubation. This failure rate was 9.9% in the standard method which would have been 1.1% if our proposed formula was used. Conclusion: The findings of this study suggest that the use of this new formula may help in predicting the proper intubation tube placement. Further studies are warranted to confirm these findings

ISPIRANJE ŽELJEZA IZ SIROMAŠNE RUDE BOKSITA U CILJU NJEZINE UPORABE U VATROSTALNOJ INDUSTRIJI

Iron-bearing minerals are the most important interfering compounds that are found with bauxite reserves. The element iron has adverse effects on bauxite applications, including the use of bauxite in refractory soils. The purpose of this research is to investigate the possibility of iron removal from low-grade bauxite ores to utilize them in refractory industries. For achieving this purpose, iron removal tests were performed on bauxite samples with an alumina to silica modulus of 0.73. After determining the appropriate iron removal method among the magnetic separation, calcination, and leaching (with H2SO4 and HCl) processes, optimal separation conditions were determined by tests that were designed using the Taguchi method. According to leaching results, using HCl for raw feed (un-calcined) provided the best result for iron removal. During this test, Fe2O3 grade decreased from 5.14% to 0.08%, and the alumina to silica modulus increased to 0.75. Calcination of the concentrate obtained from this test has led to favorable results in reducing the Fe2O3 grade (0.04%) and increasing the Al2O3 grade. Afterwards, in tests designed by the Taguchi method, the effect of parameters such as time, process temperature, HCl concentration, and feed grain size on iron removal from bauxite by HCl leaching processes are discussed. According to the results, the best efficiency of iron removal for a feed grain size of 250 µm is achieved in the following conditions: 30% HCl, process temperature of 25°C, and process time of 120 minutes. In this case, iron removal efficiency and Fe2O3 grade in process concentrate are 92.78% and 0.56%, respectively.Minerali nosioci željeza najvažnije su nečistoće koje se nalaze u rezervama boksita. Željezo ima štetne učinke na primjenu boksita, uključujući korištenje boksita u vatrostalnim tlima. Svrha je ovoga rada istražiti mogućnost uklanjanja željeza iz ruda boksita niske kvalitete radi iskorištavanja u vatrostalnoj industriji. U tu svrhu provedena su ispitivanja izdvajanja željeza na uzorcima boksita s modulom aluminijeva oksida i silicija od 0,73. Nakon utvrđivanja odgovarajuće metode za izdvajanje željeza, uključujući magnetsku separaciju, kalcinaciju i luženje (s H2SO4 i HCl), određeni su optimalni uvjeti izdvajanja uz upotrebu Taguchijeve metode. Rezultati luženja HCl-om rovne sirovine (nekalcinirane) dali su najbolji rezultat izdvajanja željeza. Tijekom ovoga ispitivanja udio Fe2O3 smanjio se s 5,14 % na 0,08 %, a modul aluminijeva oksida i silicija povećao se na 0,75. Kalciniranje koncentrata dobivenoga ovim ispitivanjem dovelo je do povoljnih rezultata u smanjenju nekorisne komponente Fe2O3 (0,04 %) i povećanju korisne komponente Al2O3 . Nakon toga u ispitivanjima dizajniranim Taguchijevom metodom određen je utjecaj parametara kao što su vrijeme, temperatura procesa, koncentracija HCl i veličina zrna sirovine, na uklanjanje željeza iz boksita procesima luženja HCl. Prema dobivenim rezultatima najbolja učinkovitost uklanjanja željeza za veličinu ulaznoga zrna od 250 µm postiže se u sljedećim uvjetima: 30 % HCl, temperatura procesa od 25°C i vrijeme procesa 120 minuta. U ovome slučaju učinkovitost uklanjanja željeza i sadržaj Fe2O3 u procesnome koncentratu iznosi 92,78 % odnosno 0,56 %

Study of Body Rights in Theology with Medical Approach in the Liturgical Realm

ABSTRAC

Molekularna i serološka istraživanja invazije vrstom Neospora caninum u golubova u jugozapadnom Iranu.

Neospora caninum is a protozoan parasite with worldwide distribution, mainly implicated as responsible for bovine abortion. There are indications that the presence of birds on cattle farms could be associated with the increase in seroprevalence and abortions related to N. caninum. The present study reports the serological (Neospora agglutination test) and molecular (PCR) presence of N. caninum in pigeons. From the 102 samples analyzed, 31 samples (30.39%) were seropositive for N. caninum and the overall molecular prevalence of N. caninum in the brains of the same pigeons was 9.8% (10/102). This is the first report of detection of N. caninum in Iranian pigeons. The results indicate soil contamination due to N. caninum oocysts, because pigeons feed from the ground, and suggest that the meat from the pigeons may be an important source for infection of dogs.Neospora caninum praživotinja je proširena diljem svijeta koja pretežito uzrokuje pobačaj u goveda. Upozorava se da prisutnost ptica na goveđim farmama može biti povezana s povećanjem serološke prevalencije i broja pobačaja uzrokovanih tom vrstom. U ovom je istraživanju N. caninum dokazana u golubova serološki testom aglutinacije i molekularno lančanom reakcijom polimerazom. Od 102 pretražena uzorka 31 (30,39%) je bio serološki pozitivan na prisutnost N. caninum, a molekularna prevalencija u mozgu istih golubova iznosila je 9,8% (10/102). To je prvo izvješće o dokazu N. caninum u iranskih golubova. Rezultati pokazuju da je onečišćenje tla oocistama N. caninum izvor uzročnika za golubove jer se oni hrane na tlu. Također se upozorava na činjenicu da meso golubova može biti važan izvor zaraze za pse

Molekularna i serološka istraživanja invazije vrstom Neospora caninum u golubova u jugozapadnom Iranu.

Neospora caninum is a protozoan parasite with worldwide distribution, mainly implicated as responsible for bovine abortion. There are indications that the presence of birds on cattle farms could be associated with the increase in seroprevalence and abortions related to N. caninum. The present study reports the serological (Neospora agglutination test) and molecular (PCR) presence of N. caninum in pigeons. From the 102 samples analyzed, 31 samples (30.39%) were seropositive for N. caninum and the overall molecular prevalence of N. caninum in the brains of the same pigeons was 9.8% (10/102). This is the first report of detection of N. caninum in Iranian pigeons. The results indicate soil contamination due to N. caninum oocysts, because pigeons feed from the ground, and suggest that the meat from the pigeons may be an important source for infection of dogs.Neospora caninum praživotinja je proširena diljem svijeta koja pretežito uzrokuje pobačaj u goveda. Upozorava se da prisutnost ptica na goveđim farmama može biti povezana s povećanjem serološke prevalencije i broja pobačaja uzrokovanih tom vrstom. U ovom je istraživanju N. caninum dokazana u golubova serološki testom aglutinacije i molekularno lančanom reakcijom polimerazom. Od 102 pretražena uzorka 31 (30,39%) je bio serološki pozitivan na prisutnost N. caninum, a molekularna prevalencija u mozgu istih golubova iznosila je 9,8% (10/102). To je prvo izvješće o dokazu N. caninum u iranskih golubova. Rezultati pokazuju da je onečišćenje tla oocistama N. caninum izvor uzročnika za golubove jer se oni hrane na tlu. Također se upozorava na činjenicu da meso golubova može biti važan izvor zaraze za pse

The effect of nursing process-based care on patients' anxiety of candidates for women’s elective surgery

Abstract Background & Aim: Although surgery as a means of therapy is used today and saves many patients’ lives but it has also some complications. One of its most important psychological complications is preoperative anxiety. The aim of this study was to determine the effect of nursing process based care on patients' anxiety of candidates for women’s elective surgery. Material & Methods: Using a randomized clinical trial, 60 candidates for women’s elective surgery in kosar hospital of Qazvin city were randomly assigned to either control or experimental groups. The experimental group was assessed based on nursing process after admission. If any nursing diagnoses including anxiety, knowledge deficit, or fear were found, then the required training was provided to the patients. The control group just received routine care. Data was collected using Amsterdam Preoperative Anxiety and Information Scale (APAIS) and a laboratory test for measurement of serum cortisol level. Data analysis was performed by descriptive and inferential statistics (Chi-square test, fisher’s exact test, paired t test, independent t test, Wilcoxon and Pearson correlation) using SPSS-PC (v.17). Results: Paired t test results showed that the mean score for preoperative anxiety in the experimental group (13.6 ± 3.3) compared to the time of admission (23.33 ± 3.6) has been significantly decreased (p= 0.001, t= - 4.7). Whereas the mean score for preoperative anxiety in the control group (23/4 ± 4.28) compared to mean score of anxiety at admission time (17/03 ± 3.96) had been increased (p=0.001, t = -7.39). Results of independent t test showed that the mean preoperative anxiety score in the experimental group was significantly less than control group (p=0.001, t = -10.3). Conclusion: According to the results, nursing care based on nursing process as an effective and non pharmaceutical intervention can be recommended for reducing anxiety and concerns of these patients

Restless leg syndrome severity in young women is associated with neuropsychological performance and menstrual disorders

Background & aim: Restless leg syndrome (RLS) is a frequent sensory dyskinesia disorder of the nervous system and a cause of disability in several aspects. We aimed to explore the relationship between RLS and mood complications, menstrual patterns and associated symptoms among young women. Methods: This cross-sectional survey undertaken on 118 female university students in Birjand, Iran in 2020 using a multistage cluster sampling method. The degree of RLS was judged using the International RLS Severity Scale. The severity of PMS was characterized via the Premenstrual Syndrome Screening Tool (PSST). Neuropsychological performance was evaluated by standard questionnaires. Results: Of the 118 young women, 29.7%, 32.2%, 27.9% and 10.2% of the participants were not affected by RLS, or had, mild, moderate, or severe types of RLS, respectively. The subjects with RLS had significantly lower duration of their menstruation cycle, and higher PSST scores, compared to those without it. Subjects with different severities of RLS scored higher for severity of depression, anxiety, stress, insomnia and sleepiness than normal women (p<0.01). RLS score was a significant factor related to the scores for: cognitive abilities (β=-0.33; P=0.022), depression (β=0.32; P=0.001), anxiety (β=0.24; P=0.003), stress (β=0.44; P<0.001), quality of life (β=-0.23; P<0.001), insomnia (β=0.21; P=0.001), sleepiness (β=0.15; P=0.014) and PSST (β=0.28; P=0.019). Conclusions: In the absence of health management, RLS potentially associated to depression, anxiety, sleep disruption, cognitive impairment, decreased quality of life and menstrual problem. Future intervention studies is required for support these results