elham esmaeili

This paper proposes a new approximate full adder (FA) based on the majority logic (ML) concept. The fundamental structure of the ML concept is a 3-input majority voter and is widely utilized in digital arithmetic cells. The ML-based proposed FA works at low power, small delay, and low power-delay-product (PDP). The carbon nanotube field-effect transistor (CNTFET) technology lowers the FA power, while the gate diffusion input (GDI) technique is used as the main technique. The swing issue of the GDI technique is resolved by the dynamic threshold (DT) technique. Compared with its exact circuit, the proposed FA saves 2 majority gates, 3 inverters, and a 4.02 ns delay. In the proposed FA, the PDP is improved by 53.73%. The product of the PDP and the normalized mean error distance (NMED) is called PDPE, and in the presented FA, it is reduced by 9.50%. Moreover, the proposed FA is embedded into a multiplier-less discrete cosine transform (DCT) design, which is an appropriate circuit for very large-scale integration (VLSI) systems. The 8-input DCT architecture consumed 2.2321 mW of power for each DCT operation. Also, the circuit has better performance in terms of PDP-area-product (PDAP). The results of DCT implementations confirm the efficiency of the FA.

Mass media is one of the main components of human societies, and our lives depend on the media, so that media literacy and informational literacy are necessary in today's society. Two variables that could be related to media literacy are critical thinking and attitudes towards science and technology. To draw a better picture of these relationships conducting empirical studies is warranted. In doing so, the present study aimed to investigate the predictive role of critical thinking and attitudes toward science in media literacy of students of Islamic Azad University, Qom Branch. 180 participants (76.1% female) were selected by non-random sampling method and answered the Ricketts Critical Thinking Disposition Questionnaire, the Science and Technology Attitude subscale from the Science Education Communication Questionnaire, and the Media Literacy Questionnaire. Data were analyzed by Pearson correlation coefficient and stepwise regression. The results showed that critical thinking and positive attitudes towards science were positively correlated with media literacy. Critical thinking and positive attitudes towards science were also significant predictors of students' media literacy. Based on the results of this study, the links of media literacy to critical thinking skills and attitudes towards science have been confirmed. It seems necessary to study strategies to strengthen critical thinking and create a positive attitude towards science in students.

The purpose of this study was to test and present structural modeling of the consequences of learning organization culture at Arak University. The research method was a descriptive correlational. The statistical population of this study was all 247 employees of Arak University. Using Morgan's table and a simple random sampling method, 176 people were taken as the sample size. Standardized questionnaires were used to collect the data. The obtained data were analyzed using correlation, confirmatory factor analysis method, and structural equation model by using SPSS and LISREL software. The results showed that there is a direct and significant relationship between the variables of learning organization culture and motivation to learning transfer with the coefficient of (ß = 0.32) and also between learning organization culture and informal learning with the coefficient of (ß = 0.25). Learning organization culture negatively and significantly affected the staff’s turnover intention with the coefficient of (ß = -0.54). In other words, an increase in the learning organization culture leads to an increase in the motivation of employees to transfer learning and informal learning, as well as reduces their intention to turnover.

 Acanthosis nigricans (AN) is a condition with an important characteristics of symmetrical areas  of thickened skin with grayish brown Hyperpigmentation. The mucosa may show a papillomatous surface, with or without hyperpigmentation. Lips and sites at risk of trauma may be affected and palmoplantar might also be present. In some rare cases, acanthosis nigricans presents as a sign of internal neoplasia, mostly a gastrointestinal cancer, and is called malignant acanthosis nigricans (MAN).

In this study, a 55-year-old female Iranian patient with malignant acanthosis nigricans (MAN) is reported. She was seeking esthetic treatment for her oral and perioral regions. The peculiarity of this case is simultaneous skin manifestation consistent with MAN, “tripe palms,”(TP) , and Leser-Trélat (LT) sign and mucosal changes in the oral cavity such as papillomatosis and roughened surfaces of the lips, hard palate and buccal mucosa. These changes harbored gastric adenocarcinoma stage T3 N3, but the patient was asymptomatic except for pruritis.

There is an urgent need to suspect a correlation between oral and skin changes and the possibility of an internal neoplasia, therefore it is of utmost importance to refer these patients for early diagnosis of the underlying disease. This would improve the prognosis and lessen the consequences to a great extent.

Schizophrenia is a chronic psychiatric disorder, which reduces the patient’s quality of life. Although a minimum dose of medications has been recommended for treating this disorder, antipsychotic polypharmacy has been used experimentally leading to an increase in drug interactions. Aripiprazole is associated with a lower risk of metabolic side effects and is recommended as a first-line treatment for schizophrenia. Biomarkers can serve as predictive of treatment response in patients with schizophrenia. The aim of this study was to compare the efficacy of antipsychotic medication polypharmacy with Aripiprazole monotherapy in patients with long-term schizophrenia, using blood biomarkers.

Nineteen patients with long-term schizophrenia, who had received at least 2 types of antipsychotics with daily doses of more than 500 mg of chlorpromazine, were included in the study. The response rates to the treatment based on the Brief Psychiatric Rating Scale (BPRS) score and the blood level of Interleukin 2 (IL-2), Interleukin 6 (IL-6), Interleukin-1 Receptor Antagonist (IL-1RA), and Brain-derived Neurotrophic Factor (BDNF) biomarkers were compared in antipsychotic polypharmacy and 6 months after monotherapy with Aripiprazole.

The mean concentrations of IL-6, IL-1RA, and IL-2 significantly decreased after the intervention. The mean changes in the BPRS scores and also the relationship between changes in blood biomarkers and BPRS scores after intervention were not significant.

The conversion of the antipsychotic polypharmacy state to monotherapy with Aripiprazole has been accompanied by a significant decrease in the serum levels of IL-2, IL-6, and IL-1RA. These biomarkers can be used for evaluating the response rate of schizophrenia treatments in the future.

Perceived organizational policy, considered as one of the most important variables in the organizational behavior and an effective factor in the social and organizational context of every society, has stimulated many studies. One important issue in the literature of organizational policy is examining its relation with job quit and ethics. These politics may be perceived either positive or negative. However, many researchers have focused their studies on the negative perception of organizational policies and its consequences at work for the communication power of policies in the organization and intensity of negative consequences resulting from negative policies at individual and organizational levels. Political behavior can affect job productivity. The employees who perceive organizational environment as political recognize it stressful, disappointing and disproportionate with their psychological features. The goal of this study is examining the role of professional ethics as the mediator of negative consequence of perceived organizational policy i.e. intention of job quit.

Most Organizations believe that if the intervening policies decrease in the organization, their psychological features will increase and they will consider professional ethics′ criteria in that job more. They will also have lower intention to quit their jobs. Thus, organizations should provide the conditions for decreasing job quit and increasing professional ethics in case of the existence of organizational policy.

Pulseoximetry is widely used in the critical care setting، currently used to guide therapeutic interventions. Few studies have evaluated the accuracy of SPO2 (puls-eoximetry oxygen saturation) in intensive care unit after cardiac surgery. Our objective was to compare pulseoximetry with arterial oxygen saturation (SaO2) during clinical routine in such patients، and to examine the effect of mild acidosis on this relationship. In an observational prospective study 80 patients were evaluated in intensive care unit after cardiac surgery. SPO2 was recorded and compared with SaO2 obtained by blood gas analysis. One or serial arterial blood gas analyses (ABGs) were performed via a radial artery line while a reliable pulseoximeter signal was present. One hundred thirty seven samples were collected and for each blood gas analyses، SaO2 and SPO2 we recorded. O2 saturation as a marker of peripheral perfusion was measured by Pulseoxim-etry (SPO2). The mean difference between arterial oxygen saturation and pulseoximetry oxygen saturation was 0. 12%±1. 6%. A total of 137 paired readings demonstrated good correlation (r=0. 754; P<0. 0001) between changes in SPO2 and those in SaO2 in samples with normal hemoglobin. Also in forty seven samples with mild acidosis، paired readings demonstrated good correlation (r=0. 799; P<0. 0001) and the mean difference between SaO2 and SPO2 was 0. 05%±1. 5%. Data showed that in patients with stable hemodynamic and good signal quality، changes in pulseoximetry oxygen saturation reliably predict equivalent changes in arterial oxygen saturation. Mild acidosis doesn’t alter the relation between SPO2 and SaO2 to any clinically important extent. In conclusion، the pulse oximeter is useful to monitor oxygen saturation in patients with stable hemodynamic.