Estimation of Completeness of Cancer Registration for Patients Referred to Shiraz Selected Centers through a Two Source Capture Re-capture Method, 2009 Data

Sharifian, Roxana,SedaghatNia, Mohammad Hossein,Nematolahi, Mohtram,Zare, Najaf,Barzegari, Saeed Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.13

Background: Cancer has important social consequences with cancer registration as the basis of moving towards prevention. The present study aimed to estimate the completeness of registration of the ten most common cancers in patients referred to selected hospitals in Shiraz, Iran by using capture-recapture method. Materials and Methods: This cross-sectional analytical study was performed in 2014 based on the data of 2009, on a total of 4,388 registered cancer patients. After cleaning data from two sources, using capture-recapture common findings were identified. Then, the percentage of the completeness of cancer registration was estimated using Chapman and Chao methods. Finally, the effects of demographic and treatment variables on the completeness of cancer registration were investigated. Results: The results showed that the percentages of completeness of cancer registration in the selected hospitals of Shiraz were 58.6% and 58.4%, and influenced by different variables. The age group between 40-49 years old was the highest represented and for the age group under 20 years old was the lowest for cancer registration. Breast cancer had the highest registration level and after that, thyroid and lung cancers, while colorectal cancer had the lowest registration level. Conclusions: According to the results, the number of cancers registered was very few and it seems that factors like inadequate knowledge of some doctors, imprecise diagnosis about the types of cancer, incorrectly filled out medical documents, and lack of sufficient accuracy in recording data on the computer cause errors and defects in cancer registration. This suggests a necessity to educate and teach doctors and other medical workers about the methods of documenting information related to cancer and also conduct additional measures to improve the cancer registration system.

Burden of Breast Cancer in Iranian Women is Increasing

Sharifian, Abdolhamid,Pourhoseingholi, Mohamad Amin,Emadedin, Majid,Nejad, Mohammad Rostami,Ashtari, Sara,Hajizadeh, Nastaran,Firouzei, Seyed Alireza,Hosseini, Seyed Jalil Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.12

Background: Breast cancer (BC) is the leading cause of oncological death for women, in both developed and developing countries. In Iran, breast cancer ranks first among cancers diagnosed in women. The aim of this study was to present the burden of this cancer including incidence, mortality and years life lost (YLL) due to breast cancer in Iranian women. Materials and Methods: National incidence data from the Iranian annual National Cancer Registration reports from 2003 to 2009 and national death statistics reported by the Ministry of Health and Medical Education from 1995 to 2010, stratified by age group, were included in this analysis. Also calculated YLLs provided by the Institute for Health Metrics and Evaluation (IHME) for the years 1990, 1995, 2000, 2005 and 2010 were employed to express the years lost due to BC for Iranian women. Results: The general mortality rate of breast cancer increased during these years from 0.96 to 4.33 per 100,000 and incidence increased from 16.0 to 28.3 per 100,000 for the years under study. YLLs calculated by IHME showed both increasing and decreasing patterns, with a tendency for stabilization. Conclusions: The burden of breast cancer for Iranian women is still increasing. Thus, health education programs to inform women regarding the signs and risk factors, and national screening to facilitate early diagnosis are needed for the female community in Iran.

Ovarian Cancer in Iranian Women, a Trend Analysis of Mortality and Incidence

Sharifian, Abdolhamid,Pourhoseingholi, Mohamad Amin,Norouzinia, Mohsen,Vahedi, Mohsen Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.24

Background: Ovarian cancer is an important cause of mortality in women. The aim of this study was to evaluate the incidence and mortality rates and trends in the Iranian population and make predictions. Materials and Methods: National incidence from Iranian annual of National Cancer Registration report from 2003 to 2009 and National Death Statistics reported by the Ministry of Health and Medical Education from 1999 to 2004 were included in this study. A time series model (autoregressive) was used to predict the mortality for the years 2007, 2008, 2012 and 2013, with results expressed as annual mortality rates per 100,000. Results: The general mortality rate of ovarian cancer slightly increased during the years under study from 0.01 to 0.75 and reaching plateau according to the prediction model. Mortality was higher for older age. The incidence also increased during the period of the study. Conclusions: Our study indicated remarkable increasing trends in ovarian cancer mortality and incidence. Therefore, attention to high risk groups and setting awareness programs for women are needed to reduce the associated burden in the future.

Estimation-Based Load-Balancing with Admission Control for Cluster Web Servers

Saeed Sharifian,Seyed Ahmad Motamedi,Mohammad Kazem Akbari 한국전자통신연구원 2009 ETRI Journal Vol.31 No.2

The growth of the World Wide Web and web-based applications is creating demand for high performance web servers to offer better throughput and shorter user-perceived latency. This demand leads to widely used cluster-based web servers in the Internet infrastructure. Load balancing algorithms play an important role in boosting the performance of cluster web servers. Previous load balancing algorithms suffer a significant performance drop under dynamic and database-driven workloads. We propose an estimation-based load balancing algorithm with admission control for cluster-based web servers. Because it is difficult to accurately determine the load of web servers, we propose an approximate policy. The algorithm classifies requests based on their service times and tracks the number of outstanding requests from each class in each web server node to dynamically estimate each web server load state. The available capacity of each web server is then computed and used for the load balancing and admission control decisions. The implementation results confirm that the proposed scheme improves both the mean response time and the throughput of clusters compared to rival load balancing algorithms and prevents clusters being overloaded even when request rates are beyond the cluster capacity.

The effect of the synthesis route on the grain size and morphology of ZnO/Ag nanocomposite

Fariborz Sharifian Jazi 한양대학교 세라믹연구소 2012 Journal of Ceramic Processing Research Vol.13 No.5

Ag/ZnO nanocomposite powders have various applications as contact materials. There are some methods for synthesizing them such as chemical vapor deposition (CVD), co-precipitation, spray-pyrolysis, sol-gel, laser ablation and hydrothermal routes. In this study, Ag/ZnO nanocomposite powders have been synthesized by three various co-precipitation techniques. The nanocomposite powders obtained were evaluated by scanning electron microscopy (SEM), X-ray diffraction (XRD), simultaneous thermal analysis (STA), X-ray fluorescence (XRF) and energy dispersive X-ray spectroscopy (EDS). The experimental results showed that the size of the nanocomposite samples was in the range of 50-100 nm. Finally, it was found that the optimum route for preparing Ag/ZnO nanocomposite powders was the dropping funnel method.

Impacts of Room Temperature on the Performance of a Portable Propane Air Conditioner

Ahmad Sharifian,Jeri Tangalajuk Siang 대한설비공학회 2015 International Journal Of Air-Conditioning and Refr Vol.23 No.2

The performance of a portable propane air conditioner system, in which the temperatures of the air passing over the condenser and evaporator are equal, has been experimentally investigated under different room temperatures and refrigerant charge levels. The research has been carried out in a range of room temperatures from 20°C to 35°C and in undercharge, standard charge and overcharge conditions. The results show that, at higher room temperatures, the refrigerant temperature in all parts of the system, the density of the refrigerant at the inlet and outlet of the condenser, mass of the refrigerant in the compressor, the mass flow rate of the refrigerant and the cooling capacity of the system in either the undercharge or full charge condition, the specific cooling capacity of the undercharge system, the useful work of the compressor, and the maximum pressure of the refrigerant increase. The increase in room temperature decreases the density of the refrigerant at the inlet and outlet of the capillary tube, the mass of the refrigerant in the capillary tube, the refrigerant subcooling at the inlet of the capillary tube, the maximum velocity of the refrigerant and the coefficient of performance. In addition, the increase in room temperature at overcharge condition causes an increase in the mass flow rate, cooling capacity and specific cooling capacity to a maximum value followed by their decrease. The most important difference between a portable air conditioner and a nonportable system is the increase in cooling capacity with an increase in room temperature in full charge condition.

Agreement of Iranian Breast Cancer Data and Relationships with Measuring Quality of Care in a 5-year Period (2006-2011)

Keshtkaran, Ali,Sharifian, Roxana,Barzegari, Saeed,Talei, Abdolrasoul,Tahmasebi, Seddigheh Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.3

Objectives: To investigate data agreement of cancer registries and medical records as well as the quality of care and assess their relationship in a 5-year period from 2006 to 2011. Methods: The present cross-sectional, descriptive-analytical study was conducted on 443 cases summarized through census and using a checklist. Data agreement of Nemazi hospital-based cancer registry and the breast cancer prevention center was analyzed according to their corresponding medical records through adjusted and unadjusted Kappa. The process of care quality was also computed and the relationship with data agreement was investigated through chi-square test. Results: Agreement of surgery, radiotherapy, and chemotherapy data between Nemazi hospital-based cancer registry and medical records was 62.9%, 78.5%, and 81%, respectively, while the figures were 93.2%, 87.9%, and 90.8%, respectively, between breast cancer prevention center and medical records. Moreover, quality of mastectomy, lumpectomy, radiotherapy, and chemotherapy services assessed in Nemazi hospital-based cancer registry was 12.6%, 21.2%, 35.2%, and 15.1% different from the corresponding medical records. On the other hand, 7.4%, 1.4%, 22.5%, and 9.6% differences were observed between the quality of the above-mentioned services assessed in the breast cancer prevention center and the corresponding medical records. A significant relationship was found between data agreement and quality assessment. Conclusion: Although the results showed good data agreement, more agreement regarding the cancer stage data elements and the type of the received treatment is required to better assess cancer care quality. Therefore, more structured medical records and stronger cancer registry systems are recommended.

Prediction of Thermal Decomposition Temperature of Polymers Using QSPR Methods

Ajloo, Davood,Sharifian, Ali,Behniafar, Hossein Korean Chemical Society 2008 Bulletin of the Korean Chemical Society Vol.29 No.10

The relationship between thermal decomposition temperature and structure of a new data set of eighty monomers of different polymers were studied by multiple linear regression (MLR). The stepwise method was used in order to variable selection. The best descriptors were selected from over 1400 descriptors including; topological, geometrical, electronic and hybrid descriptors. The effect of number of descriptors on the correlation coefficient (R) and F-ratio were considered. Two models were suggested, one model having four descriptors ($R^2$ = 0.894, $Q^2_{cv}$ = 0.900, F = 172.1) and other model involving 13 descriptors ($R^2$ = 0.956, $Q^2_{cv}$ = 0.956, F = 125.4).

A New Basic Unit for Cascaded Multilevel Inverters with the Capability of Reducing the Number of Switches

Laali, Sara,Babaei, Ebrahim,Sharifian, Mohammad Bagher Bannae The Korean Institute of Power Electronics 2014 JOURNAL OF POWER ELECTRONICS Vol.14 No.4

In this paper, a new basic unit is proposed. Then, a cascaded multilevel inverter basded on the series connection of n number of these new basic units is proposed. In order to generate all of the voltage levels (even and odd) at the output, three different algorithms to determine the magnitude of the dc voltage source are proposed. Reductions in the number of power switches, driver circuits and dc voltage sources in addition to increases in the numbr of output voltage levels are some of the advantages of the proposed cascaded multilevel inverter. These results are obtained through a comparison of the proposed inverter and its algorithms with an H-bridge cascaded multilevel inverter from the point of view of the number of power electronic devices. Finally, the capability of the proposed topology with its proposed algorithms in generating all of the voltage levels is verified through experimental results on a laboratorary prototype of a 49-level inverter.

Effect of Various Topology Control Mechanisms on Maximum Information Flow in Wireless Sensor Networks

Mohammad Khalily Dermany,Sahar Sharifian 한국산학기술학회 2015 SmartCR Vol.5 No.1

Wireless sensor networks have overcome limited resources by employing a large number of sensors in coordination. This large number of sensors creates redundancy and resource-underutilization problems, which reduces the network’s effective throughput. Both topology control and network coding mechanisms have been shown to be effective with respect to prolonging network lifetime via both low energy consumption and load balancing. They also improve network capacity and performance via better spatial bandwidth reuse. A basic problem arising when both network coding and topology control mechanisms are employed is the effect of diverse topology control mechanisms on network coding efficiency and maximum information flow. We make a theoretical determination of the achievable maximum multicast information flow after diverse topology control mechanisms. Our simulation results show topology control mechanisms decrease both energy consumption and maximum information flow.