Compressive spectrum sensing using two-stage scheme for cognitive radio networks

The modern applications of communications that use wideband signals suffer the lacking since the resources of this kind of signals are limited especially for fifth generation (5G). The Compressive Spectrum Sensing (COMPSS) techniques address such issues to reuse the detected signals in the networks and applications of 5G. However, the raw techniques of COMPSS have low compression ratio and high computational complexity rather than high level of noise variance. In this paper, a hybrid COMPSS scheme has been developed for both non-cooperative and cooperative cognitive radio networks. The proposed scheme compiles on discrete wavelet transform – single resolution (DWT-SR) cascaded with discrete cosine transform (DCT). The first is constructed according to the pyramid algorithm to achieve 50% while the second performed 30% compression ratios. The simulation and analytic results reveal the significant detection performance of the proposed technique is better than that of the raw COMPSS techniques

Pengaruh Beban Kerja Dan Kompensasi Terhadap Komitmen Organisasional Dalam Upaya Meningkatkan Kinerja Karyawan (Studi Pada Karyawan Tingkat Pelaksana Perum Jasa Tirta I Wilayah Sungai Brantas Dan Bengawan Solo)

The purposes is to determine the effect of workload, compensation and organizational commitment to employee performance. The method is used to explanatory research by collecting information directly from the respondent, technical sampling took by stratified proporsional Random Sampling, which using the formula from Slovin to obtained sample of 116 people from a total population of 163 people. Data was collected by questionnaires designed with Likert scale. Data analysis method used to descriptive statistical analysis and inferential statistical analysis which in this study using path analysis (path analysis). Descriptive analysis show the result (1) the average value of the variable workload of 2:28 ( disagree) with the variable workload statement, its mean that their work is easy, (2) the average value of the variable compensation of 4:13 (agree) the statement of variable compensation , its means that compensation more better, (3) the average value of variable organizational commitment at 4:36 (absolutly agree) to the statement variable organizational commitment , which means that organizational commitment is very high , (4) the average value of the variable performance at 4:19 (agree) with the statement of performance variable , which means that the employee's performance is good. The findings showed that there is a significant and positive effect between work load on organizational commitment (β = 0.434, p = 0.000), there is no significant effect and negative between workload on employees performance (β = -0020, p = 0828), there is a significant and positive effect between compensation for organizational commitment (β = 0234, p = 0.005), there is a significant and positive effect of the compensation on employees performance (β = 0282, p = 0.001), and there is a significant and positive effect between organizational commitment to employees performance (β = 0.351, p = 0.000)

Environmental variables, with emphasis on improving the quality of learning in educational spaces

Physical factors of schools are one of important subjects in improving the quality of students' education and learning. Inappropriate environmental conditions in schools and lack of coordination with the surrounding environment, causes more attention to environmental comfort. The main aim of this study is to evaluate the environmental standards of comfort and presenting strategies for improving the quality of schools framework based on students' learning. The survey research method was used and the studied population are two groups. The first group is expert architectures and psychologist of Tehran Universities; and the second group is chosen from art high schools teachers in Zahedan city in the academic year of 2015-2016. Expert group who were interviewed, including 12 people (By Delfi1 Method) and the second group consisted of 310 subjects. The researchers extracted effective variables through library investigations and interviews with professors and professionals. In the next stage, the obtained variables were analyzed and after confirming the reliability and validity of the questionnaire, it was used to assess the sample’s point of view. The SPSS analysis shows that main factors respectively as: usage of natural light, , reduce noise pollution, temperature control, appropriate windows and air are the most important factors affecting the environmental comfort in learning spaces and they affects the quality of students' learning. In previous researches researchers mainly consider the effect of light, temperature, noise and air condition. In some cases they consider the effect of one of the factors on learning; and it was the criteria for evaluating the students’ score. But in this research the researchers evaluate the effects of five environmental factor on learning.  Finally, the research findings have been formulated as the design principles of schools in order to enhance users’ learning

Coupling ultrasound with enzyme-assisted extraction of essential oil from algerian artemisia herba-alba asso

The composition of the essential oil (EO) of Artemisia herba-alba Asso, extracted by Hydro-Distillation (HD) and by coupling Ultrasound with Enzyme-Assisted Extraction (UE-AE) prior to HD from the plant's aerial parts were analyzed by GC-MS. Antibacterial, antifungal and antioxidant activities of the obtained EOs were evaluated. The yield of EO extraction after pretreatment of the desert wormwood leaves by coupling ultrasound with enzymes was in the range of 1.56%±0.07 compared to 1.01% ±0.08 in HD process; also, the total time necessary to complete EO extraction is 180min for HD and 120min for UE-AE. GC-MS profiling of the EOs showed changes in chemo type obtained by HD from camphor/1,8-cineole/α-mujone/chrysanmenone to a new chemo type in the case of UE-AE: camphor/α-thujone/1,8-cineole/filifolone; Then, an increasing of filifolone, α-thujone, 3-octyne and cis-limonene oxide characterize the UE-EO. The antifungal activity of the EO has slightly increased when extracted by UE-AE, however, both antibacterial and antioxidant activities were interestingly increased

Yield, fruit quality and physiological responses of melon cv. Khatooni under deficit irrigation

To evaluate the effect of water deficit stress on growth, yield, fruit quality and physiological traits of melon cv. Khatooni, field experiments were conducted in split plot randomized complete block design with three replications. In 2014, irrigation treatments consisted of two deficit irrigation regimes, 33% and 66% of ETc (crop evapotranspiration), and 100% ETc as the control (DI33, DI66 and I100). In 2015, irrigation treatments applied were: 40, 70 and 100% ETc (DI40, DI70 and I100). The results showed that plant height and leaf area decreased from treatment I100 to DI40 and DI33. The highest average fruit weigh and yield were obtained from irrigation 100% ETc for both years. The water use efficiency (WUE) significantly increased in response to increase water deficit stress. Deficit irrigation treatments significantly decreased leaf relative water content, vitamin C and fruit firmness, whereas antioxidant enzymes activity, proline and total soluble solid contents increased. These results suggest that the crop is sensitive to water deficits, that moderate water stress (DI70 and DI66) reduced yield by about 28.5-38.2% and severe water stress (DI40 and DI33) had a much more marked effect, reducing yield by 48.1-61.4%

Chemical constituents and bioactivity of piper sarmentosum: A mini review

Herbs with medicinal potential are important for health and wellness. The main aim of this review article was to disseminate important information regarding the use of Piper sarmentosum as natural medicine. P. sarmentosum have been reported to possess a varying degree of hypoglycemic, antidiabetic and other additional properties. The antioxidant properties of the herbs may be effective in controlling the oxidative damage. The review article highlights the positive role of traditional herbs as alternative medicine

The ontological basics of perfectionism in designing educational sites

Background and Objectives: The ultimate goal of education is the learner’s growth. Therefore, the main concern of the architects in this field is the educational environment design in accordance with the high goals of educational system. In this study, relying on the opinions of Islamic thinkers in Quranic sciences field, the teachings derived from the Holy Quran and basic components underlying the perfection has extracted. These components have proposed, as the main contents of design criteria and improving the quality of schools and educational places, in three areas of meaning, function and body to help the architects benefit from an efficient design. Materials and Methods: This study has considered as an effective fundamental research, using quantitative-qualitative methodology. The methodology, in beginning, is survey. Then, the validity of the researcher-made questionnaires and the reliability of the variables have been calculated and confirmed through Cronbach's alpha test with a coefficient of 0.764. In addition, Q factor analysis (extracting expert opinions) and R factor analysis (extracting users' interests) were also performed using spss19 software. The specialist’s statistical population includes 25 professors specialized in the fields of Islamic education, educational sciences and architecture. Next, 40 female trade school junior were selected, from Tehran trade schools, as a non-random environmental users sample. Finally, the illustrated questionnaires obtained from the views of the professors were prepared and analyzed. Findings: After 990 minutes of interviews with specialized professors of Shahid Rajaee University, Tehran University, Science and Technology University and Imam Khomeini international University of Qazvin, two-stage coding and extraction of effective categories were done to prepare a researcher-made questionnaire with 40 items. According to the results of the factor analysis, the following three factors have detected; 1- Physical characteristics of educational buildings as a factor of human spiritual excellence, 2- Introversion as an effective factor in human self-knowledge and self-construction, 3- Extroversion as a factor in regulating environmental conditions and natural areas of human perfection from the view of the specialists. Then, the users’ illustrated questionnaires in 9 different educational fields with 3 quality grades, have distributed among users. Conclusion:: The students’ identified needs, regarding the meaning and spiritual growth, "creating peace and security, a sense of satisfaction, increasing thinking power, fostering creativity and increasing responsibility." In the ​​function field, the following issues are supposed to have taken into account: "individualized places, observance of hierarchy, flexibility, social interactions, multifunctional spaces and the cultivation of sensory powers". In the body field, "observance of diversity, attention to details, scalability, beauty and connection with nature" should have given priority in designing the school and campus. Therefore, based on these identified variables, the obtained correlation model of the factors making students' spiritual excellence in school design is specified through: 1- body design with considering growth factor characteristics, 2- human self-knowledge and self-construction, 3- nature and environment. Therefore, considering the important role of the body and especially the characteristics of the school environment in the growth of students' talents, the optimal design of educational environments is clearly effective to make a suitable ground for their spiritual growth. ===================================================================================== COPYRIGHTS©2021 The author(s). This is an open access article distributed under the terms of the Creative Commons Attribution (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, as long as the original authors and source are cited. No permission is required from the authors or the publishers. ====================================================================================

High‐resolution impedance manometry parameters enhance the esophageal motility evaluation in non‐obstructive dysphagia patients without a major Chicago Classification motility disorder

This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving'. © 2017 John Wiley & Sons, Inc. All rights reserved.Background High‐resolution impedance manometry (HRIM) allows evaluation of esophageal bolus retention, flow, and pressurization. We aimed to perform a collaborative analysis of HRIM metrics to evaluate patients with non‐obstructive dysphagia. Methods Fourteen asymptomatic controls (58% female; ages 20–50) and 41 patients (63% female; ages 24–82), 18 evaluated for dysphagia and 23 for reflux (non‐dysphagia patients), with esophageal motility diagnoses of normal motility or ineffective esophageal motility, were evaluated with HRIM and a global dysphagia symptom score (Brief Esophageal Dysphagia Questionnaire). HRIM was analyzed to assess Chicago Classification metrics, automated pressure‐flow metrics, the esophageal impedance integral (EII) ratio, and the bolus flow time (BFT). Key Results Significant symptom‐metric correlations were detected only with basal EGJ pressure, EII ratio, and BFT. The EII ratio, BFT, and impedance ratio differed between controls and dysphagia patients, while the EII ratio in the upright position was the only measure that differentiated dysphagia from non‐dysphagia patients. Conclusions & Inferences The EII ratio and BFT appear to offer an improved diagnostic evaluation in patients with non‐obstructive dysphagia without a major esophageal motility disorder. Bolus retention as measured with the EII ratio appears to carry the strongest association with dysphagia, and thus may aid in the characterization of symptomatic patients with otherwise normal manometry