It has been reported in the literature that the perception of crime at the neighbourhood level inversely affects the walking behaviour of individuals. On the other hand, the gated neighbourhoods are considered safe from crime, however, there is a lack of research on the association of the perception of crime and walking in gated neighbourhoods. Therefore, the objectives of the study reported in this paper were to investigate the association between the perception of crime and walking in gated and non-gated neighbourhoods. A questionnaire was used to collect the data on walking and the perception of crime in 16 neighbourhoods of Karachi Pakistan, 8 out of which were gated. Independent sample t-test and gamma tests were used for the data analysis. The results show that although there is a lower perception of crime in the gated neighbourhoods, yet the inhabitants of gated neighbourhoods engage in less physical activity comprising of walking. In spite of a greater perception of crime in non-gated neighbourhoods, higher values of walking were reported by the residents of those neighbourhoods. Therefore, it has been concluded that there does not exist a definite relationship between the perception of crime and walking behaviour at the neighbourhood level and the perceived safety from crime claimed by the proponents of the gated neighbourhoods does not encourage walking among the residents.

Neighbourhood environment (NE) is important for physical activity (PA); however, no studies have compared the NE and PA in gated neighbourhoods, especially in developing countries. Therefore, the objective of this study is to compare NE and PA between gated and non-gated neighbourhoods. Objective and subjective (n = 1042) methods and independent sample t-tests were used. Results show that all the indicators are significantly different except housing density. Vigorous Physical Activity (VPA) is higher in gated but walking is higher in non-gated neighbourhoods. Therefore, it can be concluded that gating can reduce walking habits of people living in gated neighbourhoods in developing countries.

The present study aimed to produce a monosex population of all male Nile tilapia (Oreochromis spp.) using 17α-methyl testosterone and common carp testes (as a source of natural androgen). Trial was conducted into two consecutive phases, the first was fry (4-5 days old)administration with negative control (without hormone) and positive control (with hormone) feed viz., MT1:60mg/kg, MT2:70mg/kg (17α-MT), carp testis CT1:70% and CT2:80% for 30 days to reverse the sex of male fish and the second phase was nursing the fingerlings for two months on control diet (32% Crude protein).Results revealed a significant growth rate (P<0.05) in the control group where final weight (4.8±0.34ab) and weight gained was recorded as 0.66±0.03ac. In proximate chemical composition of body meat, CT2 treatment showed maximum retention of crude protein, crude fat, and ash whereas dry matter showed maximum retention in MT2 and CT1 treatments. Morphological and histological examination revealed significant difference (p<0.05) in phenotypic males of Nile tilapia fed with the highest percent in MT-treated diet (MT2) of 95±0.58a while MT1, CT2 and CT1 had males of 85±6.0b, 70±5.0b and 65±6.5b, respectively. It was concluded that synthetic androgen (17αMT) was more effective for masculinization but natural androgen scan be an alternative method to produce male tilapia population in an environment-friendly manner as they are inexpensive, eco-friendly, and radially available. These results suggested that synthetic and natural androgen supplementation in the diet plays a significant role in improving growth performance and body composition.

Keywords: Landslide, GIS, Susceptibility, Fuzzy logic, Pakistan Landslide is among one of the most important natural hazards that lead to modification of the environment. It is a regular feature of a rapidly growing district Mansehra, Pakistan. This caused extensive loss of life and property in the district located at the foothills of Himalaya. Keeping in view the situation it is concluded that besides structural approaches the non-structural approaches such as hazard and risk assessment maps are effective tools to reduce the intensity of damage. A landslide susceptibility map is base for engineering geologists and geomorphologists. However, it is not easy to produce a reliable susceptibility map due to complex nature of landslides. Since 1980s, several mathematical models have been developed to map landslide susceptibility and hazard. Among various models this paper is discussing the effectiveness of fuzzy logic approach for landslide susceptibility mapping in District Mansehra, Pakistan. The factor maps were modified as landslide susceptibility and fuzzy membership functions were assessed for each class. Likelihood ratios are obtained for each class of contributing factors by considering the expert opinion. The fuzzy operators are applied to generate landslide susceptibility maps. According to this map, 17% of the study area is classified as high susceptibility, 32% as moderate susceptibility, 51% as low susceptibility and areas. From the results it is found that the fuzzy model can integrate effectively with various spatial data for landslide hazard mapping, suggestions in this study are hope to be helpful to improve the applications including interpretation, and integration phases in order to obtain an accurate decision supporting layer.

Cities around the world have been hit by the COVID-19 crisis. The worst consequences of the pandemic are closely related to urban areas. Many studies investigated the impact of COVID-19 on people but there are few studies that have investigated the satisfaction level of university students during the COVID-19 lockdown at the neighborhood level. Therefore, the aim of this study is to investigate the satisfaction of university students at the neighborhood level during the COVID-19 lockdown and investigate the experience of online education during that period—if they received any. An online survey was conducted involving university students of different countries, and a total of 427 responses (n = 427) were received and analyzed using the CHAID model. Results show that comfort at residences during the COVID-19 lockdown was affected by the neighborhood environment (viz., greenery, pleasant views, independent housing with gardening facilities), transportation (i.e., saving 1–2 commuting hours on a daily basis and safety from traffic hazards), and the provision of online education (i.e., effectiveness, such as traditional methods of education and the opportunity to connect with field experts). Thus, it can be concluded that providing green neighborhoods, detached or terraced houses (townhouses) with visual connection, and gardening facilities for the residents should be encouraged in the future because these types of neighborhoods are not only comfortable in ordinary situations but also provide comfort during critical periods such as COVID-19 lockdowns. It can also be concluded that a hybrid style of education should be encouraged for universities, as it can save travel time, provide safety from traffic, and provide more opportunities to become connected with international experts through online guest lectures, seminars, and workshops.