Dynamic Modeling and Simulation of Control System for Pneumatic Servo Valve Using Piezoelectric Actuator

In this study design and simulation of controller for piezoelectric pneumatic servo valve is done. The dynamic model of the valve using analytical approach and the working principle of the servo valve is analyzed. The pole placement method is used to design a controller using observed variables. The valve controls the situation and position of actuator. Then for the system, full order state observer and PID controller based on ITAE (Integral Time Absolute Error) criteria are investigated and the response of system with these controllers is shown and a comparison is done for different schemes of controller design and the best design is selected for the system

Presentation Quantum Computation Based on Many Level Quantum System and SU(n) Cohered States and Qubit, Qutrit and Qubit Using Nuclear Magnetic Resonance Technique and Nuclear Quadrupole Resonance

Abstract: In this article we have considered the effect of a magnetic field, the Zeeman effect, nuclear magnetic resonance (NMR) and nuclear quadrupole resonance (NQR) on nuclei with spin S ½ looked. Then energy levels, transition frequencies and the energy spectra for the nuclear spins have specified. After using the group definition SU(2), SU(3), SU(4), SU(N) OR SU(2S+1), In quantum mechanics and quantum computation the range nuclear energy levels sin to one qubit, qutrit and qudit assign. We have defined the quantum states

Multi-objective routing and scheduling for relief distribution with split delivery in post-disaster response

Abstract Following the occurrence of unexpected events and natural disasters, a highly important relief operation is the transferring of relief commodities from the distribution centers (DCs) to shelters. In this paper, a three-level network consisting of depot of vehicles, distribution centers,and shelters has been considered for routing and scheduling of relief vehicles through introducing a multi-objective model. The first objective function represents the total arrival time of vehicles to DCs and shelters. The second objective function illustrates the number of vehicles used. We use the TH method to deal with the multi-objective problem. During the relief commodities distribution, issues such as the feasibility of getting service from each distribution center with multiple vehicles and heterogeneous fleet of vehicles has been regarded. In order to solve the proposed model and represent its efficiency, we select the fourth region of Tehran city as a case study; run the model on it, and present solution results. Keywords: Disaster Management, Multi-objective optimization, Routing, Scheduling 1-Introduction The occurrence of natural and man-made disasters such as flood, earthquake, thunderstorm, etc. would cause drastic social and economic damages, as well as the displacement and even the death of thousands of people. Accordingly, in order to lower the casualties and economic losses in these disasters, certain relief operations should be considere

The Effect of Root Coating with Titanium on Prevention of Root Resorption in Avulsed Teeth; An Animal Study

Introduction: Tooth avulsion is a real dental emergency. If immediate replantation is not performed, the avulsed tooth may be lost due to inflammatory or replacement resorption. This animal study aimed to evaluate the bone response to the titanium coating of the root surface as an artificial barrier, and prevention of resorption of avulsed teeth. Methods and Materials: This experimental study was conducted on four male dogs. The dogs were randomly divided into two groups for assessment at two and eight weeks. Four teeth were extracted in each animal. The root surfaces of the test group were coated with a titanium layer using the Electron Beam Deposition system. After 24 h, replantation of the teeth was performed. Two animals were sacrificed after two weeks and the remaining dogs were killed after eight weeks. The presence of inflammation, inflammatory resorption, replacement resorption, periodontal regeneration, periapical granuloma and ankylosis were evaluated through histological analyses. Results: Inflammatory root resorption was not present in any tooth except one tooth in the coated group after eight weeks. Replacement resorption was noted just in three of the non-coated teeth after two weeks and two teeth after eight weeks. The McNemar's test revealed that the frequency of replacement resorption in the non-coated group was significantly higher than the coated group (P=0.031). Conclusion: Based on the results of this study, it seems that coating the root surfaces of avulsed teeth with titanium may control the replacement root resorption.Keywords: Avulsion; Root Resorption; Titanium Coatin

Self Esteem and its Associated Factors in Patients with Multiple Sclerosis

Background & Aim: Multiple Sclerosis (MS) as a progressive disorder can deteriorate body image and the feeling of attractiveness and influence patients’ self-esteem through changing their cognitive experiences and attitude towards their body. Accordingly this study was conducted with aim of assessing self esteem and its related factors in patients with MS. Material & Methods: It was a descriptive, cross-sectional study. The subjects (n= 395) were recruited by convenience sampling from Multiple Sclerosis Society in Tehran. Rosenberg Self-Esteem Inventory was used as data collection tool. Data was analyzed by independent t-test, ANOVA, Pearson correlation, Spearman correlation coefficient, chi-square test and post hoc Scheffe test using SPSS-PC (version 16). Results: The mean score of self-esteem was 17/5 ± 53/20. Most patients had moderate self-esteem, and only a small percentage of them (16.2%) had high self esteem. There were significant relationship between the patients’ self-esteem and their age, educational level, marital status, employment status and the duration of disease (P<0.05). Conclusions: Nurses are able to consider the patients’ esteem needs by recognition of high risk groups and provide appropriate interventions to improve the quality of life of these patients and their families

The exact synchronization timing between the cleavage embryo stage and duration of progesterone therapy-improved pregnancy rates in frozen embryo transfer cycles: A cross-sectional study

Background: Synchronization between the embryonic stage and the uterine endometrial lining is important in the outcomes of the vitrified-warmed embryo transfer (ET) cycles. Objective: The aim was to investigate the effect of the exact synchronization between the cleavage stage of embryos and the duration of progesterone administration on the improvement of clinical outcomes in frozen embryo transfer (FET) cycles. Materials and Methods: 312 FET cycles were categorized into two groups: (A) day- 3 ET after three days of progesterone administration (n = 177) and (B) day-2 or -4 ET after three days of progesterone administration (n = 135). Group B was further divided into two subgroups: B1: day-2 ET cycles, that the stage of embryos were less than the administrated progesterone and B2: day-4 ET cycles, that the stage of embryos were more than the administrated progesterone. The clinical outcome measures were compared between the groups. Results: The pregnancy outcomes between groups A and B showed a significant differences in the chemical (40.1% vs 27.4%; p = 0.010) and clinical pregnancies (32.8% vs 22.2%; p = 0.040), respectively. The rate of miscarriage tended to be higher and live birth rate tended to be lower in group B than in group A. Also, significantly higher rates were noted in chemical pregnancy, clinical pregnancy, and live birth in group A when compared with subgroup B2. Conclusion: Higher rates of pregnancy and live birth were achieved in day-3 ET after three days of progesterone administration in FET cycles. Key words: Endometrium, Embryo transfer, Pregnancy, Live birth, Progesterone

Upconverting nano-engineered surfaces: maskless photolithography for security applications

The two complementary technologies of colloidal upconverting nanoemitters and maskless photolithography are exploited to fabricate nanoengineered optically active surfaces for anticounterfeiting applications based on the multiphoton absorption phenomenon in lanthanide nanocomposites with a visualization wavelength in the NIR. It is demonstrated that the unique optical, thermal, and temporal characteristics of these versatile upconverting surface distinguishes them from their counterparts. A unique behavior that is captured is the ability to actively tune their emission color by modifying the pumping power, temperature, and excitation frequency. A new low-cost negative photoresist is employed for implementation of maskless photolithography of single- and double-color labels using two efficient upconverting nanocomposites based on NaYF4:Yb3+, Er3+ and NaYF4:Yb3+, Tm3+ nanoemitters. In addition, it is shown that the detectability of the proposed anticounterfeiting approach can be carried out using just a smartphone. Each of the emission peaks of the upconversion nanoparticles is associated with a different multiphoton absorption mechanism and their thermosensitivity varies from one peak to another. Furthermore, their photoluminescent color changes by scanning the excitation beam impinging on the surfaces composed of both upconversion nanoparticles doped in the UV-curable resist. Long-term photostability of these surfaces under continuous excitation by a high power laser makes them a promising nanoemitters for the next generation of anticounterfeiting labels