Abstract Access to information is a fundamental element in research and production of science process, as well as one of the metrics of development. So, the awareness and use of communicational and informational networks, as well as their related technologies could be really necessary. In this connection, internet, web and related techniques, such as RSS (Really Simple Syndication, Rich Site Summary, or RDF Site Summary) is one of these technologies which appeared on many websites, weblogs and databases, in recent years and became the most expanded and suitable tool for making awareness. Obviously, this technology allows the librarians and information scientists to find access to the existential information on websites, weblogs and databases, in order to improve their commercial, economical, educational, research, social and cultural relations. More over, using this technology can make users to access to their information by themselves, and to fulfill their informational needs. This technology through its own language programming can show the latest information and become up to date by adding new information. RSS is a Simple and quick method for current awareness, new book list, reference services, education and communication with users, which should not be ignored by librarian in libraries and information centers.Therefore, we tried first to give a definition of RSS feed as well as to present its advantages for application; then we try divide RSS readers into two main groups; web based and special software based, with some examples of each group. At the end, we suggest that for better understanding and also for providing appropriate and suitable information services for users, this technique (RSS Feed) and its facilities should not be ignored by librarians in the libraries and information centers.

Background: Several algorithms have been designed for the localization of pre-ablation accessory pathways (APs) in Wolff Parkinson White (WPW) syndrome based on QRS or delta-wave polarity in different (electrocardiographic) ECG leads. Due to the difficulty of catheter placement in the tricuspid ring, leading to increased likelihoods of ablation failure and recurrence in right-sided APs, it is essential to design an algorithm to correctly predict the Location of these APs before ablation. Methods: In this retrospective study, 294 known WPW patients with right-sided APs who had clear pre-excitation in the 12-lead ECG were divided into 8 anatomic zones and were then studied using ECG and electrophysiological characteristics. Results: An algorithm was designed based on the sum of QRS and delta-wave polarity in the V1 and inferior leads. The sensitivity and specificity of the proposed algorithm for predicting free-wall APs, including posterolateral and posterior APs, were 95% and 25%, respectively. Sensitivity and specificity were 72. 7% and 95. 8% for anterolateral and anterior APs, respectively, and 100% and 60% for lateral APs, respectively. In septal APs, the respective rates of sensitivity and specificity of the algorithm were 60% and 80% for the posteroseptal AP, 61% and 98% for the anteroseptal AP, and 31% and 90% for the midseptal AP. Conclusions: The proposed algorithm provides a precise and Simple way to differentiate between right-sided APs before performing ablation, thereby reducing ablation failure and recurrence.

Most speech enhancement algorithms focus on obtaining an estimator relying on stochastic models. In this paper, a minimum mean-square error (MMSE) estimator under a stochastic– deterministic model is proposed where a heavy-tail distribution called t-Location-Scale (tls) is used for modeling Discrete Fourier Transform coefficients of clean speech signals and exponential and sinusoidal models are employed as deterministic models. In the exponential model, the frequency and damping coefficient are estimated by using the Matrix Pencil method. Also, in previous studies, the number of exponential components in the deterministic model for stochastic-deterministic speech enhancement algorithm has been considered to be one. In this paper, the corresponding exponential model is developed to have an arbitrary number of exponential components. The speech enhancement experiments are performed in three modes, exponential-Gaussian (the first proposed method), exponential-tls (the second proposed method), and sinusoidal-Gaussian. Comparisons are made with the exponential-Gaussian method (with only one exponential component), as well as with the Weiner and tls stochastic estimators. The implementation results in the presence of six noise types from Noisex-92 dataset show that the two proposed methods improve the segSNR values and have quite similar PESQ values comparing with the stochastic based speech enhancement methods.

Background: The aim of this study was to evaluate the outcome and survival in patients with RCC treated with non-hilar clamping Simple enucleation. Methods: In this case series study, all patients in Hashemi Nejad Hospital in Tehran undergone non-hilar clamping Simple enucleation surgery in the years 1383 to 1393 by RCC T1 enrolled the study. Exclusion criteria included the presence of multi-focal RCC, synchronous mass in patients, the existence of positive lymph nodes before or during surgery and radical nephrectomy due to past RCC. 134 patients undergoing partial nephrectomy in tumors T1 (T1a, T1b) studied, 9 patients has not completed the follow up and 10 patients had oncocytoma and angiomyolipoma excluded the study. 115 patients with RCC pathology who undergone non-hilar clamping Simple Enucleation were examined. Results: In this case series study, 115 patients with pathologically confirmed RCC were evaluated on the basis that 70patients were male and 45 were female. Patients have ranged in age from 20 to 75 years old and 51. 28 year. Average figure of 97% progression free survival at three-year and five-year study was 89%. Also three-year study of cancer specific survival at five years was 100% and 95% respectively. Patients who have relapsed 2 female and 2 were male. The recurrence was not significantly associated with gender (p= 0. 511). Also 2 patients had recurrence of the left kidney and 2 were all right and there was no statistically significant difference (p= 0. 643). Every 4 patients recurrent disease have T1b the difference was significant (p= 0. 026). Also patients had recurrence of grade 2 to grade 1 patients have high grade recurrence was observed (p<0. 001). No significant difference was found between GFR before and 3 months after surgery (p= 0. 802) and a biopsy of the tumor bed margins were negative in all cases. Conclusion: Non-clamping SE in patients with T1 renal masses is similar to partial nephrectomy is onchologic results. In this study, recurrence was higher in patients with T1b tumors that appear in determining treatment and close follow-up T1 b should be more comprehensive criteria. Non clamping SE preserving kidney function is a good choice in the treatment of T1 tumors. Non clamping SE more complications following surgery and that could be more widely used.

Background and Aims: According to the common application of non-metal prefabricated posts in dentistry and lack of enough information about the stress distribution in the root canal walls by these posts, this study was performed to compare the effect of two Simple taper and double taper posts on the stress distribution on root canal walls by photo elastic method.Materials and Methods: The design of this study was experimental in photoelastic system. The posts, used in this investigation, were double taper and Simple taper fiber posts with 0.9 mm diameter and 20 mm length and epoxy resin. First two photo elastic models with tooth dimensions were fabricated and the posts were placed inside the model. Then the core of the each post was fabricated on the model. Each models were loaded in polariscope and the formed fringe order colored ring were photographed.Results: In 100 N, 90 degree angle loading in cervical and apical fringe order showed 2.50 and 1.39 in Simple taper posts and 1.39 and 2.35 in double taper post. In 150 N, 30 degree angle loading in cervical and apical fringe order showed 4 and 2.65 in Simple taper posts, and 4 and 2.5 in double taper post.Conclusion: In the vertical and oblique loads, double taper fiber post showed better stress distribution than that of Simple tapered posts.