mohammad javad shabani

The present study examined the prevalence of obsessive-compulsive disorder (OCD) among Iranian patients with multiple sclerosis (MS) and the relationship between OCD and the patient’s demographic characteristics.

The present study used a cluster sampling method to randomly select 297 patients with MS from the patients referred to the MS Clinic and Research Center of Sina University Hospital, Tehran, Iran, during 2018-2019. To gather the required data, a questionnaire consisting of demographic characteristics and disease information sections was used. Moreover, Yale-Brown Obsessive Compulsive Scale (Y-BOCS), Obsessive-Compulsive Inventory-Revised (OCI-R), and Hospital Anxiety and Depression Scale (HADS) were employed in the present study. The comparison of qualitative and quantitative values between OCD-positive and negative groups was examined with chi-square test and independent samples t-test, respectively. Binary logistic regression was used as multivariate modeling to adjust the effects of potential confounders that could distort the relation of OCD with intended variables. Data were analyzed using SPSS software. The significance level was considered lower than 0.05.

Of the total of 297 patients, 77.8% were women. Moreover, analysis of the data obtained from the HADS questionnaire revealed that 11.44% (n = 34) and 15.15% (n = 45) of patients had severe depression and severe anxiety, respectively. The results of Y-BOCS indicated that the prevalence of severe OCD among patients was 19.9%. The OCI-R questionnaire revealed that the prevalence of OCD was 47.8%, which was consistent with the total of moderate, severe, and extreme values of Y-BOCS (47.9%). Furthermore, the subscales of ordering-arranging with 69 patients (22.9%) and obsessing with 46 patients (15.5%) indicated the highest frequencies as compared to other subscales. Moreover, OCD had a significant relationship with depression, anxiety, and type of MS in this regard.

In this study, the prevalence rate of OCD among patients with MS was higher than its rate among the general population.

Based on field studies, the topographic slope effects worsen the structural damage in an earthquake. It is very vital to determine the amount of foundation settlement adjacent to the slope. In this study, a new analytical model is proposed to determine the amount of vertical settlement of the shallow foundation near the slope. In this analytical model, the inertia force due to the sliding zone mass is considered in the dynamic equilibrium equations. Moreover, it was assumed that stiffness and damping under the foundation linearly increased as the distance from the slope edge increased. In this case, the maximum stiffness and damping at a distance five times as large as the foundation width from the slope edge were considered to be the same as maximum stiffness and damping in the non-slope scenario. The foundation was loaded harmonically by changing the frequency. Comparing the results of this study with the laboratory results leads to this observation that the offered analytical model can well determine the settlement located near the slope. Furthermore, the results showed that the settlement of the foundation near the slope edge was twice as large as the settlement in the absence of a slope. Also, the settlement of the foundation became equal to that of the non-slope foundation at a distance of 4 times as large as the foundation width from the slope edge. Furthermore, with increasing slope angle and declining the foundation distance from the slope edge, due to vertical harmonic load, the foundation settlement amount increases.

 Current models show the anxiety sensitivity physical concerns as a fundamental variable related to the psychological consequences of the Covid-19 pandemic.

This study aimed to determine the relationship between COVID-19 related anxiety and health anxiety mediated by the physical concern component during the Covid-19 pandemic.

This study was a descriptive cross-sectional study conducted online. For this purpose, 554 adults in Tehran were assessed anonymously by convenience sampling methods using an online questionnaire from 21 June to 5 July 2020. The instruments of this study included the Corona Anxiety Index (CAI), Health Anxiety Inventory (SHAI), and Anxiety Sensitivity Index (ASI-3). The collected data were analyzed using the Pearson correlation method and structural equations by SPSS software version 25 and LISREL software version 8.80.

The age range of participants was between 18 and 65 years, with a mean and standard deviation of 38.03±12.21. The results of the Pearson correlation showed that the components of physical concern and health anxiety have a positive and significant relationship with COVID-19 related anxiety (P<0.05). The results of structural equations showed that there is a significant direct path from health anxiety to COVID-19 related anxiety. Also, a significant indirect pathway from health anxiety to COVID-19 related anxiety mediates the physical concern component with a coefficient of 0.16%.

 In the Iranian sample, the physical concern component mediates the relationship between health anxiety and COVID-19 related anxiety. These findings can help in effective prevention and explain the psychological effects of the Covid-19 pandemic.

The purpose of this study was to investigate the effects of depth and soak time of Gargoors on catch per unit of effort (CPUE) for Pharaoh Cuttlefish (Sepia pharaonis (Ehrenberg, 1831)). The sampling time was February-March 2017, which was coincided with the cuttlefish fishing season operated by the Gargoor fishing vessels of Bushehr port. Randomly a total of 20 Gargoor fishing vessels were sampled. The Jackknife resampling method was used to obtain more reliable estimates. Also, the Generalized Linear Model (GLM) was used to determine the relationship between depths and soak time (explanatory variable) with catch per unit of effort (response variable). According to Jackknife resampling (similar to the results of the field observation), for 2–8 days soak times than 8–14 days soak times (545.720> 509.759) and 25–40 m depths than 10–25 m depths (536.940> 516.494) the average catch per unit of effort for Pharaoh Cuttlefish was higher. Besides, based on the above resampling, the catch per unit of effort confidence intervals for soak times of 2–8 days and 8–14 days also the depths of 10–25 m and 25–40 m were 382.671-708.768, 386.225-633.293, 347.822-685.126, and 410.345-693.535, respectively. On the other hand, the results of the generalized linear model showed that both depth and soak time of Gargoors had a significant effect on the catch per unit of effort (p<0.1); such a way that, increasing the depth and decreasing the soak time increase catch per unit of effort. However, based on field data, it is expected that if Gargoor fishing vessels with operating at depths of 25-40 meters and submerging their Gargoors within 2–8 days, they could be able to perform better CPUE for Pharaoh Cuttlefish according to the fishing effort used.

Dispersive soils are problematic and they cause a great many of local damages and destructions in hydraulic structures such as dikes and irrigation channels. The correct identification and recognition of divergence are fundamental measures taken in line with preventing the early destruction of the hydraulic structures. The soil improvement using lime, especially in clayey soils (CL), brings about an increase in the optimum moisture percentage, reduction of the maximum dry unit weight, reduction of swelling potential, increase in the strength and elasticity module. The effect of lime on soil can be classified into two groups, namely short and long-term stabilization. Raise of the soil’s workability is counted amongst the short-term modification measures and it is the most important factor in the early improvement stages. The increase in the strength and stability can be considered as the lime utilization on long-term results occurring during curing and afterwards. Also, according to the reports, swelling and damages occur in the lime-stabilized soil containing sulfate. The effective role of the iron furnace slag has been well recognized in increasing the strength against sulfates and corrosive environment conditions of the mortar containing lime and sulfates.

Adding the slag products of the melting furnaces and lime is a method used to stabilize dispersive soils. The present study makes use of a mixture of clay featuring low plasticity with 1% and 2% lime and slag, for 0.5%, 1%, 3% and 5% of the weight, to improve dispersivity, shear strength and plasticity. The samples were kept in constant temperature and humidity for a day and then were subjected to direct shear, uniaxial strength and pinhole tests.

It was observed based on pinhole experiment of the initial dispersive soil sample, denoted as D1, that the sample, shown by ND2, containing lime, for 2% of the weight, and slag, for 5% of the weight, turned out to have become non-divergent. The results of the direct shear test showed that the adhesion coefficient of the slag-free samples stabilized using 1% lime has been increased from 0.238 kg/cm2 to, respectively, 0.251 kg/cm2, 0.373 kg/cm2, 0.41 kg/cm2 and 0.48 kg/cm2  per every 0.5%, 1%, 3% and 5% slag added. The adhesion of the samples stabilized using 2% lime as determined in the direct shear experiment were 0.615 kg/cm2, 0.671 kg/cm2, 0.724kg/cm2 and 0.757kg/cm2 per every 0.5%, 1%, 3% and 5% slag added. Also, the internal friction angle of the samples stabilized using 1% lime was found an increase from 14.3° for slag-free samples to 18.11°, 21.3°, 21.86° and 21.92° per every 0.5%, 1%, 3% and 5% added slag. As for the samples stabilized using 2% lime, the internal friction angles were found in direct shear test equal to 23.15°, 23.53°, 23.76° and 24.12° per every 0.5%, 1%, 3% and 5% slag added. The uniaxial strength of the slag-free samples stabilized using 1% lime was found an increase  from 1.0014 kg/cm2 to, respectively, 1.0616 kg/cm2, 1.0782 kg/cm2, 1.2127 kg/cm2 and 1.2246 kg/cm2 per every 0.5%, 1%, 3% and 5% slag added. The uniaxial strength rates has been determined in the direct shear test of the samples stabilized using 2% lime were 1.1367 kg/cm2, 1.1885 kg/cm2, 1.2322 kg/cm2 and 1.2872 kg/cm2 per every 0.5%, 1%, 3% and 5% slag added. The amount of axial strain of the slag free samples stabilized using 1% lime was found decreased from 9.6842% to, respectively, 9.3333%, 9.2683%, 9.6364% and 8.4444% per every 0.5%, 1%, 3% and 5% slag added. Moreover, the axial strain amounts obtained for the samples stabilized using 2% lime were 7.7333 kg/cm2, 7.6316 kg/cm2, 7.1517 kg/cm2 and 4.7619 kg/cm2 per every 0.5%, 1%, 3% and 5% slag added.The study results indicate that slag and lime have the capacity of improving the studied soil’s dispersivity. Furthermore, it was figured out that adding slag to the soil causes an increase in the soil strength and improves the shear strength parameters. It can be stated according to the observed results that the use of slag, a byproduct of iron smelting industry, as a substitute for a given percentage of lime is effective on the reduction of the clay soil’s divergence potential. The results of the experiments carried out to determine Atterberg limits are suggestive of the idea that the increase in the slag and lime fractions brings about a decrease in the liquid limit and plasticity and improves the plasticity properties of the soil. The reason why the soil plasticity has been reduced after being mixed with lime and slag is the cationic exchange and coarsening of the soil texture. Addition of lime to the soil causes an increase in the plasticity limit and a reduction in the liquid limit. Therefore, the plasticity index is decreased and the plasticity characteristics of the soil are improved. Adding 1% lime to the dispersive soil leads to small reduction of the liquid limit from 32.43% to 31.73%, a small increase in the plasticity limit from 13.42% to 14.66% and a insignificant decrease in the plasticity index from 19.01% to 17.07%.

Although there are a number of acceptable means of measuring mindfulness for adults, this is not the case with the child and adolescent population. A requirement, therefore, is to establish and evaluate the child and adolescent mindfulness tools, such as the child and adolescent mindfulness measure (CAMM).

The purpose of this study was to examine the validity and reliability of a Persian version of the CAMM.

This descriptive research involved a sample of 620 students aged 12 to 18 years in Kashan who were selected via cluster sampling in 2017. The participants completed the Persian CAMM, the eight-item Avoidance and Fusion Questionnaire for Youth (AFQ-Y8), the Mindfulness Attention Awareness Scale for Adolescents (MAAS-A), the Revised Children’s Manifest Anxiety Scale, and the Children’s Depression Inventory (CDI). The factor structure of the Persian CAMM was evaluated using exploratory and confirmatory factor analyses by separate samples. Test-retest reliability (with four-week interval and 50 participants), internal consistency, and convergent and divergent validities were also determined.

The results of Confirmatory Factor Analysis (CFA) showed that the one-factor (original) model of the CAMM did not meet the goodness of fit indexes. The Exploratory Factor Analysis (EFA, n = 300) indicated that the Persian CAMM had a two-factor structure and the CFA verified the acceptable fit of the two-factor scale. The instrument also exhibited good reliability (α =0.73). The correlation between CAMM and anxiety, depression, and psychological inflexibility was negative, whereas its correlation with the MAAS-A was positive (P < 0.001).

Based on the results of this study, the Persian CAMM is an appropriate tool with acceptable psychometric properties for measuring adolescent mindfulness. Mindfulness can be considered an important protective construct in the mental health of children and adolescents.

There are various methods for stabilizing excavations in urban areas which one of them is the nailing method. Designing a nailing system and analyzing the performance of excavations is done by various software applications. One of these computer programs is PAXIS software which run based on the finite element method (FEM). In the present study, a numerical analysis of the performance of the excavations was investigated under different soil model and the most appropriate model was introduced. In addition, the excavation performance was evaluated based on certain designing conditions affected by the soil resistance specifications (cohesion and internal friction angle) and surcharge. The results indicated that, using an appropriate behavioral model which contains increasing soil stiffness with depth, shows results close to reality. They also indicated that under certain designing conditions, the lateral deformation of the soil nail wall and ground settlement decrease as soil resistance specifications increase.

Water level difference on both sides of earth dam provides seepage of water from body and foundation of dam. Various methods such as the implementation of a clay blanket, cutoff wall and combination of them are used to reduce seepage from the foundation of earth dam. In present study, Seep/w software was used to investigate the seepage from the foundation of earth dam under the influence of clay blanket, cut-off wall and combined method of them. The results showed that combination of clay blanket and cut-off wall with full height by the end of permeable layer was not significantly effective compare to case without clay blanket and reduction in seepage (percentage) was almost identical in the both cases. But if clay blanket is used with incomplete cut-off wall, reduction in seepage will be doubled compared to the use of incomplete cut-off wall without clay blanket.

The purpose of this study was an estimation of the exploitation and also determination of some biological aspects for trapped Pharaoh Cuttlefish by wire pot (Gargoor) in Bushehr province (north of Persian Gulf). The data collection process was carried out from February 22 to April 19, 2017. The landing and yield of caught Pharaoh Cuttlefish by wire pots in Bushehr province, for 12 years, were 354.833 tones and 162.260 kg. km-2. year-1, respectively. The length (mantle length) and weight range of caught Pharaoh Cuttlefish (300 biometeried specimens) were 13-36 (24.62 ± 4.59) cm and 300-4200 (1870 ± 791.61) gr, respectively. Randomization Test and Two Independent Samples Kolmogorov-Smirnov Test were used for comparing the length frequencies, while showed a significant difference in all different parameters of catch; such as soak depth of Gargoors, soak time of Gargoors and types of vessel (p=0.001). The average of condition factor for Pharaoh Cuttlefishes was 1.25 which indicates the favorable living conditions of trapped Pharaoh Cuttlefish by Gargoor. Independent Samples T Test was used for comparing the condition factors, while just showed a significant difference in soak time of Gargoors (p=0.001). The results showed that due to the overlapping and synchronization of the fishing and reproduction season of Pharaoh Cuttlefish in Bushehr province and based on the range of length and weight frequencies of trapped Pharaoh Cuttlefish by wire pots, it can be stated that fishing operation using wire pots is a selective method for Cuttlefish.

The present study was carried out with a purpose to compare the species composition and diversity of the Gargoor's trapped aquatics in different depths and soak times in the winter season. This study was done in the port of Bushehr from February to March 2017. The using Gargoors had mesh size of 3.5-4 cm, cross section 150 cm, height 87-92 cm, outer span size 70-79 cm and internal span size 35-36 cm. Comparisons of species composition and diversity were based on weight furthermore number and the Shannon index, respectively. The species composition of the Gargoor's trapped aquatics included 12 species of bony fishes belonging to 7 families, one species of crustaceans, and one species of mollusks (Pharaoh Cuttlefish); While there was a significant difference in different depths as well as soak times (p <0.05). Gargoor's Shannon index for depths of 25-40 meters and 10-25 meters was 1.421 (±0.362 S.D.) and 1.229 (±0.345 S.D.), respectively. This index for soak times of 8-14 days and 2-8 days was 1.441 (±0.302 S.D.) and 1.228 (±0.393 S.D.), respectively. The Shannon index represented the more biodiversity of Gargoors between depths of 25-40 meters compared to 10-25 meters, as well as the soak times of 8-14 days compared to 2-8 days (p ˃0.05). In winter, with the arrival of Pharaoh Cuttlefish in the Gargoor's fishing grounds in Bushehr port is evident, this has high effect on the species composition of Gargoors and it was responsible for the most dissimilarity in the species composition of different depths and soak times as well. Also, if the interaction between depth and soak time taking into account, the highest values of the Shannon index observed in the depths between 10-25 meters, with 8-14 days of soak time.

The concept of psychological inflexibility (PI) was proposed by the acceptance and commitment therapy (ACT). Avoidance and Fusion Questionnaire for Youth (AFQ–Y) is one of the tools for measuring this factor in youth. The aim of this study is to assess the factor structure and psychometric features of a Persian version of AFQ-Y.

The study sample included 303 school students of Kashan city chosen through cluster sampling method during the year 2017. The tools used were AFQ-Y and Revised Children's Manifest Anxiety Scale (RCMAS). The factor structure of AFQ-Y was studied by exploratory and confirmatory factor analyses. Also, the convergent validity, test-retest reliability (4-week interval) and internal consistency of AFQ-Y were assessed. The statistical analysis was performed using version 19.0 of the SPSS and AMOS-22.

The results of exploratory factor analysis (EFA) indicated two factors: “cognitive fusion” and “experiential avoidance”. Confirmatory factor analysis (CFA) confirmed the 2-factor model (RMSEA 90% CI=0.04 - 0.06). Furthermore, the convergent validity(r= 0.60, p < 0.001), Cronbach's alpha coefficient (α= 0.80) and test-retest reliability coefficient (r= 0.73) of this scale were also acceptable.

Based on the results of the present study, the AFQ–Y is an appropriate tool with acceptable psychometric features for measuring PI in the youth population of Iran.

  In recent years, application and practice of mindfulness-based interventions to reduce adolescent psychological problems are increasing. Therefore, it is necessary to design and study tools that measure mindfulness and its effects. One of the available tools to measure mindfulness in adolescents is the mindfulness attention awareness scale for adolescents (MAAS-A). The current study aimed at examining the factor structure and reliability of a Persian version of this scale and investigating the relationship between mindfulness and anxiety. The current descriptive, cross sectional and psychometric study was conducted on 354 students from Kashan city, Iran, selected via the cluster sampling method in 2017. The exploratory factor analysis (EFA) by the principle component analysis method, the confirmatory factor analysis (CFA), and the relationship between mindfulness and anxiety were conducted to examine the validity of the MAAS-A. To calculate the reliability of the MAAS-A, Cronbach’s alpha and test-retest reliability (four-week interval) were employed. The statistical analysis was performed with SPSS version 19.0 and AMOS-22. The results of the EFA suggested two factors for this scale labeled as “acting with attention and awareness” and “attention to the present moment”. The CFA confirmed the two-factor model of the 14-item scale (the root mean square error of approximation (RMSEA) 90% confidence interval (CI) = 0.001 - 0.06). The reliability of this scale was good (α = 0.81, retest reliability = 0.86) and the correlation between mindfulness and anxiety was negative and significant (r = -0.43, P < 0.01). Also, this relationship was significant in females (r = -0.44, P < 0.01) and males (r = -0.46, P < 0.01). According to the results of the current study, the MAAS-A was a reliable and valuable scale to measure the mindfulness of adolescents. The results of correlation between mindfulness and anxiety meant that by increasing mindfulness, the anxiety reduced in adolescents.

The design engineers usually follow a specific decision-making process for optimal selection of the type of required foundation and its design. In this state, in case the surface foundation is not appropriate for the project conditions, before making any decisions about the use of deep foundations, the proper methods for optimization of the liquefied soil should be evaluated in order to compare the advantages and disadvantages of each of them with those of deep foundation, in terms of efficiency, implementation problems, costs, and finally to select the best choice. One of the best methods of soil improvement is the use of stone columns. The rationale behind the use of stone columns is the high shear strength of materials and the provision of lateral grip by surrounding soil. Therefore, the stone column can receive the load from the structure, and transfer it to the resistant layers. In the soils with low shear resistance, the lateral constraint crated by the surrounding soils is not enough for preventing the sideway buckling of the column under which is subjected to the loads. Thus, special measures should be considered for the use of stone columns in these soils. One of these methods is the use of reinforcement shelves such as geogrid and geotextile. Investigating the previous studies, the lack of evaluation of the design parameters such as the settlement ratio of the soil improved by the reinforced stone column to the geogrid, and provision of design graphs in this regard, has been revealed. Therefore, by extension of the studies conducted by Chub Basti et al. in 2011, the design graphs were provided in this regard. The PLAXIS V8 Software was used for modelling the soft soil improved by the stone column. For increasing the precision of the results, the 15-knot element was used in the current study. The fine mesh was used in the models made for the analysis of the problem. For simulation of the improved soft soil with the stone column in a single cell, the modelling was implemented in a two-dimensional environment in axial symmetry conditions. In the current study, it was assumed the rigid foundation is on the improved bed. Thus, for analysis of the simulated model, a vertical strain up to 2% of the soft soil height has been applied on the ground. Also, for simulation of the soil behavior, an appropriate model of soil and parameters proportional to the materials should be allocated to the construct geometry. The non-linear stress-strain of the soil in different levels of the problem can be simulated. The number of model parameters increases with the level of problem rupture. For precise simulation, we need the proper parameters of the materials. For modeling of soft soils and stone columns, elastic-plastic model with Mohr-Coulomb rupture criterion was used. In the current study, it was assumed the soft bed is located on a very hard layer of soil. Therefore, the vertical deformation was prevented on this horizontal boundary. Also, the horizontal deformation in two vertical edges was prevented and only deformation in vertical direction was allowed. The soft bed close to saturation was considered without the determined free water level. For models with stone columns, the element of interface between the stone column and soft soil, has been used. The reason behind using this element is that the stone column rupture is of shear form and due to this, a significant shear stress is created on the common surface between the stone column and soft soil. The percentage of the replacement area is defined as the ratio of the total area of the stone columns to the total area of the non-improved area. In the current study, the percentage of the replacement area is utilized between 10 to 30%, which is used in implementation. Also, the diameter of the stone columns is from 0.6 to 1.2, in the analyses. The results of the numerical study were compared with the existing theoretical relationships provided by Poorooshasb and Meyerhof (1997), and Pulko et al. (2011). Figure 1 shows the comparison of the replacement percentage (RP) and settlement ratio (SR) in the non-reinforced state in the current study as well as theoretical relationships proposed by the previous researchers. Based on this figure, there is a difference between the results of the current study and those of Poorooshasb and Meyerhof (1997), and Pulko et al (2011). Poorooshasb and Meyerhof (1997) calculated the settlement ratio in their proposed material with the assumption of linear elasticity of the materials without consideration for plastic settlement. Therefore, the settlement of the improved soft soil with stone column, calculated by Poorooshasb and Meyerhof, would not show the real amount. However, Pulko et al. (2011), with consideration for the elastoplastic behavior of the materials, the lateral expansion of the stone column, and the primary stress of the soil around the column, provided more realistic results that correspond closely with the present study. Also, for designing the stone column, the results of its reinforcement have been also provided in the graph presented in Figure 2. Thus, by the use of these graphs, the ratio of settlement reduction can be obtained for each distance between columns and with different percentages of alternatives.

Background and Avoidance and cognitive fusion are two components of psychological inflexibility and are the main concepts of Acceptance and Commitment Therapy (ACT). The purpose of this study was to evaluate the psychometric properties of the Avoidance and Fusion Questionnaire for Youth (AFQ-Y8).
A descriptive cross-sectional study was conducted in 300 students in Kashan, Iran who were selected by cluster sampling. The Avoidance and Fusion Questionnaire for Youth (AFQ-Y8) and the Revised Children's Manifest Anxiety Scale (RCMAS) were administered to collect the data. The factor structure of the questionnaire was evaluated using exploratory and confirmatory factor analysis. Also, the convergent validity with RCMAS, test-retest reliability, and internal consistency of this questionnaire were examined.
Exploratory factor analysis indicated one factor called psychological inflexibility. Confirmatory factor analysis confirmed the one factor model of the questionnaire (RMSEA 90% CI =0.00-0.07). Also, the convergent validity with RCMAS was found to be good (r = 0.60, p AFQ-Y8 is an appropriate tool with acceptable psychometric properties to measure the psychological inflexibility of adolescents in Iran.

This study has aimed to determine the food regime of Nemipterus japonicus in Bushehr province water, between Bushehr and Nyband using the vacant stomach index (VI), food behavior index (FB) and gonado-somatic index (GSI) in 2012-2013. Two hundred sixteen filled stomach, 14 semi- filled stomach and 215 empty stomach were analyzed. Small fish and Crustaceans were constituated main and secondry foods with 51.03% and 15.66% respectively. Mollusca were random food (5.52%). VI of stomach was estimated 48.32%. This value demonstrated that this species was moderate feeder. The result of Non-Parametric Multi-Divisional Scaling, shows the stomach contents difference between length classification. Also, determined some independent population which different length group, has no overlap from feed aspect.

The biomass and distribution of Penaeus semisulcatus were investigated in the Southern water of Bushehr province in 2014. Total CPUE of Penaeus semisulcatus was calculated 264/313 kg/h. There was no significant difference in CPUE of Penaeus semisulcatus indifferent regions and depth layers (P>0.05). From the depth layers and various regions, maximum mean CPUE were observed in 10-20 m layer zone with 10.92±3.21 kg/h and Rase Khan to Motaf region with 15.35±3.88, respectively. There was no significant difference in mean CPUE of Penaeus semisulcatus indifferent regions and depth layers (P>0.05). Total CPUA of Penaeus semisulcatus was calculated 1460 kg/nm2. CPUA did not differ significantly between various regions and depth layers (P>0.05). Total biomass of Penaeus semisulcatus was estimated 524 tons in the entire study area. Maximum biomass was estimated in Rase Khan to Motaf region with 389 tons and 20-30 m layer zone with 205 tons.

The aim of this study was to record the length-weight relationship and condition factor of A. maculatus from Persian Gulf coastal waters. The specimens were collected on a monthly basis from April to March 2013. Overal 766 specimens were caught. Size and weight of collected fish ranged between 13/2-48 cm and 31.2-1820 gr. The Condition of the growth fish was allometrically negative with b value

The aim of this study was to comparing the effect of different hanging ratios (E=0.5 and 0.6) of drift gillnets on catch rates, length composition and Catch per Unit Effort (CPUE) in Bushehr coastal waters between late September 2010 to late March 2011. The length frequency of Spanish Makerels did not differ significantly between gillnets with 0.5 and 0.6 hanging ratios (P>0.05). A total of 55889 kg of various large pelagic species were caught during 6 cruises in six months that 26409 and 29552 kg were related to gillnets with 0.5 and 0.6 hanging ratios, respectively. The catch composition of gillnet with 0.5 hanging ratio was included: Thunnus tonggol %48.81, Euthynnus affinis %25.41, Scomberoides commersonnianus %17.02, Carcharhinus amblyrhynchoides %3.87, Scomberomorus commerson %3.39, Rachycentron canadum %1.17, Sphyraena jello%0.33 and species composition of gill net with 0.6 hanging ratio was included: Thunnus tonggol %52.18, Euthynnus affinis %24.29, Scomberoides commersonnianus %16.52, Scomberomorus commerson %3.33, Carcharhinus amblyrhynchoides %2.88, Rachycentro ncanadum %0.61 and Sphyraena jello%0.19. The CPUE did not differ significantly between two gillnets (P>0.05).

This study was performed to estimate the growth parameters and mortality rate of (Nemipterus japonicus Bloch, 1971) with using length frequency data in Bushehr fishing grounds. sampling did monthy with using cutlassfish pelagic trawl, gillnet and bottem trawl. The growth parameters of k and L∞ were estimated 0.79 y-1 and 31.5 cm respectively. The t0 was estimated -0.2. b quantity for this species equals to 2.71 which indicating the negative allometric growth model. W∞ quantity estimated about 390.07 g The exploitation rate (E) For this species was 0.31,with respect to fishing effort it is low and it shows that this stock has potential for more exploit too.

Nowadays، with the increase of terrorist attacks near the urban areas، the building design under the blast loadings is really significant، especially for some important buildings and vital arteries. When an explosion occurs، the blast waves can cause severe damages to the structures. Since the existing steel structures are usually designed to gravity and seismic loads، it is necessary to investigate their performances under blast loadings. In this study، analytical studies have been done for 3D structural models of special moment frames (SMF)، concentrically braced frames (CBF) and eccentrically braced frames (EBF) with different number of stories 3، 5 and 10. The Nonlinear dynamic method is applied for analyzing the models under two different levels of blast loadings. The blast load pattern and other criteria are based on the UFC 3-340-02. The plastic hinge rotation، ductility ratio، performance levels، brace axial forces، shear forces and flexural moments in all models are obtained from the analysis and compared with each others. The non-linear behavior is mostly observed in the front face columns due to the explosion location. It can be said that the structure performance is highly depended on the Peripheral elements under the blast loadings. Also، the EBF systems generally show the better performances than other systems under blast loadings.

Biomass and density of green tiger prawn were estimated in Bushehr waters during July - August in 2004, 2005 and 2006. Study area was located from Motaf (27 30 N and 51 50 E) to Daylam waters (30 00 N and 50 00 E) in the northern part of the Iranian waters of the Persian Gulf with about 2000 nm limit. 45 stations in 15 transects were selected in the waters less than 10 m, 10-20 m and 20-30 m deep. Sampling was done by bottom trawl net. The maximum catch per unit effort (CPUE) of green tiger prawn was obtained in south area. From middle to end of shrimp fishery season (August) CPUE increased in the northern area. Based on our estimations, the initial total shrimp biomass in the south area was 674, 1024 and 873 tons in 2004, 2005 and 2006, the percentage biomass being 77, 75 and 86, respectively.Investigation of the shrimp concentration in the Bushehr waters showed that the green tiger prawns entered the fishing grounds from the southeastern parts of Bushehr waters, and Motaf, Nakhilu, Rase khan and Rod mond could be considered the initial appearance zones. Dense schools of green tiger prawns were observed above 10 meter depth in late June and early July and at 20-30meter depth in late July.