Purpose: To report visual and anatomical outcome of flap Loss after LASIK surgery for correction of high myopia. Materials & Methods: Retrospective evaluation of flap Loss in two eyes of two patients, a rare complication of LASIK Surgery. Case No. 1: 27 y/o woman with Ref. OD -9.75; 2.75*177 VA. CC: 20/60 KR OD: 41.86*77 39.86 * 168 & partial amblyopia due to anisometropia. Case No. 2: 38 y/o woman with Ref OD. -9.50 1.0*177 VA CC: 20/30 KR OD: 42.06*77 40.99 * 167. Results: In both patients during LASIK surgery free cap complication occurred and after Laser therapy free cap positioned over the stromal bed, but the next day after operation flaps were lost. For case NO.1only medical management performed and after 4.5 years F/U cornea has 2° central haziness. For case NO.2 another corneal flap from donor globe cut and sutured with Nylon 10/0 and after 18 months F/U cornea is clear. Conclusion: In patients with flat keratometry less than 41.0 Diopter rate of free cap are high and after laser therapy for high myopia the keratometry became more flat. If surgeon doesn't suture flap the rate of flap Loss increase so for prevent of corneal haziness and corneal ectazia this evaluation suppose to perform donor corneal flap graft.      

Purpose: Report a case of iatrogenic medial rectus Loss in exotropia surgery and its management with review literature.Case Report: A 14-year-old female with a history of cerebral palsy and left exotropia underwent strabismus surgery in another center when she was 7 years old. As her surgeon reported, after 8 mm medial rectus resection, it was lost and he could not retrieve it; so, to balance the forces of adduction and abduction, the surgeon disinserted left lateral rectus, but 2 months later, because of large angle exotropia and severe limitation in adduction, she was referred to this center. We explored the area and could not find the lost medial rectus; so, half tendon transposition of superior rectus and inferior rectus to the previous insertion site of medial rectus was performed and left lateral rectus was fixated to the lateral orbital periosteum. Two months after the operation, she was orthotropic and ocular movements were significantly balanced.Conclusion: Half tendon transposition of vertical recti to the site of lost medial rectus associated with periosteal fixation of lateral rectus can improve the strabismus of lost medial rectus muscle.

In this article, an attempt has been made to estimate the amount of sound transmission Loss in a flat oval channel by applying the approach of statistical energy analysis. Correct estimation of sound transmission Loss in an air conditioning channel is of great importance due to the harmful effects of noise pollution in the environment on human health. Simulation with the statistical energy analysis method is a powerful approach to estimate sound and vibration in problems in which we deal with complex and multi-part systems; is considered. In this method, first, a system is divided into several subsystems, and then by writing a matrix equation that includes the energy exchanges between subsystems and energy Loss coefficients; It is investigated from the perspective of vibration and sound estimation.On average, the model presented in this research is able to estimate the sound transmission Loss in different dimensions of the air conditioning channels according to the experimental results in the accuracy range of ± 2.5 dB. Considering that it seems that the results obtained from modeling with this method are in good agreement with the experimental data; The results of this research can be used as an efficient approach to estimate noise in oval shaped channels stretched in different lengths.

Background and Aims: Caries and bone Loss are the most common diseases in oral cavity. The prevalence of these diseases will be reduced by controlling their risk factors. In this study, bitewing radiographs of patients were examined to illustrate the relationship between caries and bone Loss.Materials and Methods: One-hundred and fifty bitewing radiographs of 86 patients were evaluated. In these radiographs, caries and distance between alveolar crest and CEJ were measured. In addition, confounding variables (contact type, tooth type, tooth surface) were assessed. Furthermore, patients were asked about the use of other possible risk factors of bone Loss like smoking, brushing, and fLossing. The data were analyzed using Regression analysis.Results: Findings of this study showed that the relationship between caries and bone Loss was significant (P=0.02). Also, there were significant relationships between fLossing (P=0.03), tooth type (P=0.0001) tooth surface (P=0.02) and bone Loss. Finally the multivariate analyses considering confounding variables illustrate significant relationship between caries and bone Loss (P=0.0001(Conclusion: Caries and bone Loss have important roles as the risk factors for each other. Thus, it is necessary to prevent these risk factors and treat them as soon as possible to reduce these diseases.

In this article, investigate between market Return & stock Return. The finding research show that, time series result, is significant.

The main goal of this research was to investigate the capability of past style Return in predicting future Return in comparison with past Return. To achieve this goal, based on the book-to-market value and the company size, 150 companies data listed in Tehran Stock exchange in period from 1384 to 1393 were used in the study. In this relation style Return and stock Return were independent variable and (1, 3, 6, 12) future month stock Returns was dependent variable. After controlling size, book-to-market value by using two stage Fama and Mack Beth Regression (1973) the data were analyzed. The result of the study indicated that the past 6 month style Return can predict future Return (1, 3and 6) better than past 6 month Return. Furthermore there was a significant relationship between the past 6 and 12 month style Return and future month Return (1, 3, 6, and 12). On the other hand, the ability to predict the future Return by 12 past month style Return was better than 6 past month Return.

Standard asset pricing models based on rational expectations and homogeneity have problems explaining the complex and volatile nature of financial markets. The heterogeneity in expectations can lead to market instability and complicate dynamics of prices, which are driven by endogenous market forces. Our aim is to point out that the investors’ irrationality explains various numbers of financial anomalies, especially the phenomena that traditional financials models have never been able to explain. using a behavioral finance approach and an agent-based model we examine the dynamics of stock price fluctuations and their rates of Return in an artificial market composed of fundamentalists and non-fundamentalists with Loss-adverse bias. our goal is to point out a posibility that Loss-adverse feature of investors explains vast number of financial stylized fact and plays an important role in price formation of financial markets. The results of intensive analysis indicate that the existence of agents having heterogeneous beliefs and preferences has provided a better understanding of price dynamics in the financial market.