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The purpose of this study was to the synthesis of Fe₃O₄@SiO₂ nanocomposites and using it as an adsorbent for removal of diazinon from aqueous solutions. Structural characteristics of the synthesized magnetic nanocomposite were described by Fourier transform infrared spectroscopy and scanning electron microscopy.

The effects of different parameters including pH (2-10), contact time (1-180 min), adsorbent dosage (100-2000 mg L⁻¹) and initial diazinon concentration (0.5–20 mg L⁻¹) on the removal processes were studied. Finally, isotherm and kinetic and of adsorption process of diazinon onto Fe₃O₄@SiO₂ nanocomposites were investigated.

The maximum removal efficiency of diazinon (96%) was found at 180 min with 1000 mg L⁻¹ adsorbent dosage using 0.5 mg L⁻¹ diazinon concentration at pH = 7. The experimental results revealed that data were best fit with the pseudo-second-order kinetic model (R² = 0.971) and the adsorption capacity was 10.90 mg g⁻¹. The adsorption isotherm was accordant to Langmuir isotherm.

In the present study, the magnetic nanocomposites were synthesized and used as an absorbent for the removal of diazinon. The developed method had advantages such as the good ability of Fe₃O₄@SiO₂ nanocomposites to remove diazinon from aqueous solution and the magnetic separation of this absorbent that make it recoverable nanocomposite. The other advantages of these nanocomposites are rapidity, simplicity and relatively low cost.

Post-partum depression (PPD) is a mood disorder that affects 20-40 per cent of women in their post-delivery period worldwide. The purpose of this paper is to compare dietary intakes of energy, macronutrients, cholesterol, saturated fatty acids (SFAs), mono-unsaturated fatty acids (MUFAs), poly-unsaturated fatty acids (PUFAs), some micronutrients and antioxidants in PPD patients with healthy controls.

This case-control study was conducted on 163 women in postpartum period (81 PPD and 82 non-PPD) using Edinburgh questionnaire for the diagnosis of PPD. Dietary nutrients intake was assessed using 147-item semi-quantitative food frequency questionnaire (FFQ). Portion sizes of food items were converted to grams per day. Logistic regression models were used to estimate the association between tertiles of dietary intakes with the odds ratio (OR) of PPD.

According to the fully adjusted model, highest tertile compared to lowest tertile dietary intake of SFAs [OR = 0.01; 95 per cent confidence interval (CI) = 0.00, 0.01, p = 0.001], MUFAs (OR = 0.01; 95 per cent CI = 0.00, 0.02, p < 0.001), total fats (OR = 0.01; 95 per cent CI =0.00, 0.01, p < 0.001) and cholesterol (OR = 0.06 ; 95 per cent CI = 0.01, 0.08, p < 0.001), thiamine (OR = 0.01; 95 per cent CI = 0.00, 0.01, p < 0.001), riboflavin (OR = 0.10; 95 per cent CI = 0.02, 0.39, p < 0.001), pyridoxine (OR = 0.03; 95 per cent CI =0.01, 0.32, p < 0.001), folate (OR = 0.01; 95 per cent CI = 0.00, 0.01, p < 0.001), cobalamine (OR = 0.01; 95 per cent CI = 0.00, 0.01, p < 0.001) , selenium (OR = 0.79 ; 95 per cent CI =1.36, 3.32, p < 0.001), iron (OR =0.68; 95 per cent CI = 0.24, 0.94, p < 0.001) and iodine (OR = 0.36; 95 per cent CI =1.10, 1.38, p < 0.001) had a protective effect on the incidence of PPD. Furthermore, higher intake of vitamin A and beta-cryptoxanthin can increase the incidence of PPD (OR =114.29; 95 per cent CI =17.85, 118.12, p < 0.001) and (OR = 4.85; 95 per cent CI = 1.49, 15.69, p = 0.015), respectively.

PPD may have destructive effects on the relationship between mother and infant. Results of previous studies demonstrated nutrients are required for the synthesis of neurotransmitters and have biochemical role in the nervous system.

The purpose of this study was to assess the knowledge of head and neck cancers (HNCs), their risk factors, signs and symptoms among the general public of Karachi, Pakistan.

Initially, 503 individuals were approached for data collection, out of which 404 fit the inclusion criteria (response rate = 80.03%). Nonprobability convenience sampling was utilized to select participants who fell under the age group of 15–60 years, barring the fields of Bachelor of Medicine and Bachelors of Surgery (MBBS) and Bachelors of Dentistry (BDS). Knowledge was evaluated by a 9-item questionnaire, the scores of which yielded the following interpretations: No (0), low (1–3), moderate (4–6) and high (7–9) knowledge.

Of the 404 participants who completed the questionnaire, 357 (88.4%) participants claimed to be aware of HNC. The HNC knowledge scores had a statistical relevance with socioeconomic status (p = <0.01) and level of education (p = 0.02). Most participants recognized a “lump or swelling in the throat” (87.1%) as the most common symptom, followed by “bleeding in mouth or throat” (84.7%). Surprisingly, 75.25% of participants thought HNCs were inclusive of brain cancer.

Overall, knowledge of HNCs among the general public of Karachi surpasses the knowledge in other regions around the world. Our study demonstrated that people indulge in unhealthy habits despite having sufficient knowledge and this warrants prompt interventions and counseling of the people.

This article provides an overview of recent developments relating to the application of thesauri in information organisation and retrieval on the World Wide Web. It describes some recent thesaurus projects undertaken to facilitate resource description and discovery and access to wide‐ranging information resources on the Internet. Types of thesauri available on the Web, thesauri integrated in databases and information retrieval systems, and multiple‐thesaurus systems for cross‐database searching are also discussed. Collective efforts and events in addressing the standardisation and novel applications of thesauri are briefly reviewed.

The relationship between terrorism and foreign direct investment (FDI) has stimulated research curiosity given its effects on lives lost, injuries, property damaged, and the psychological aftereffects, which to a very large extent impact economic growth and development. The realization of the magnitude of its influence on bilateral economic ties engineered the study, which examined the impact of terrorism on FDI in Nigeria. The data for this study were sourced from Global Terrorism Index (GTI), Stockholm International Peace Research Institute (SIPRI) database, International Country Risk Guide (ICRG)’s Quality of Governance (QoG) database, Central Bank of Nigeria (CBN) Bulletin, and World Bank Development Indicators (WDI) using autoregressive distributive lag (ARDL) bounds testing approach as described by Pesaran et al. (2001). From the results obtained, military expenditure, episode(s) of ethnic violence, and terrorist attacks have all been noted to have negative and significant impacts on FDI in Nigeria. The implication is that the reduction in FDI observed in the data is attributed to terrorism. Therefore, governments should overhaul the security apparatus so as to quell the menace of terrorists. This will go a long way to create a conducive environment for FDI to thrive, which will create more jobs for the growth and development of the Nigerian economy.

This study aims to present a unique hybrid metaheuristic approach to solving the nonlinear analysis of hall currents and electric double layer (EDL) effects in multiphase wavy flow by merging the firefly algorithm (FA) and the water cycle algorithm (WCA).

Nonlinear Hall currents and EDL effects in multiphase wavy flow are originally described by partial differential equations, which are then translated into an ordinary differential equation model. The hybrid FA-WCA technique is used to take on the optimization challenge and find the best possible design weights for artificial neural networks. The fitness function is efficiently optimized by this hybrid approach, allowing the optimal design weights to be determined.

The proposed strategy is shown to be effective by taking into account multiple variables to arrive at a single answer. The numerical results obtained from the proposed method exhibit good agreement with the reference solution within finite intervals, showcasing the accuracy of the approach used in this study. Furthermore, a comparison is made between the presented results and the reference numerical solutions of the Hall Currents and electroosmotic effects in multiphase wavy flow problem.

This comparative analysis includes various performance indices, providing a statistical assessment of the precision, efficiency and reliability of the proposed approach. Moreover, to the best of the authors’ knowledge, this is a new work which has not been explored in existing literature and will add new directions to the field of fluid flows to predict most accurate results.

The particle distribution in a fluid is mostly not homogeneous. The inhomogeneous dispersion of solid particles affects the velocity profile as well as the heat transfer of fluid. This study aims to highlight the effects of varying density of particles in a fluid. The fluid flows through a wavy curved passage under an applied magnetic field. Heat transfer is discussed with variable thermal conductivity.

The mathematical model of the problem consists of coupled differential equations, simplified using stream functions. The results of the time flow rate for fluid and solid granules have been derived numerically.

The fluid and dust particle velocity profiles are being presented graphically to analyze the effects of density of solid particles, magnetohydrodynamics, curvature and slip parameters. Heat transfer analysis is also performed for magnetic parameter, density of dust particles, variable thermal conductivity, slip parameter and curvature. As the number of particles in the fluid increases, heat conduction becomes slow through the fluid. Increase in temperature distribution is noticed as variable thermal conductivity parameter grows. The discussion of variable thermal conductivity is of great concern as many biological treatments and optimization of thermal energy storage system’s performance require precise measurement of a heat transfer fluid’s thermal conductivity.

This study of heat transfer with inhomogeneous distribution of the particles in a fluid has not yet been reported.

Hospitals are all required to be prepared against crisis, while according to studies, most hospitals are not prepared enough to encounter disaster problems. Therefore, each hospital should have an established programme to face earthquake and other catastrophes. This paper aims to investigate this issue.

This descriptive study was carried out in teaching hospitals of Iran University of Medical Sciences. Data collection was done using a checklist including general information, as well as information on demography, security, supplies and equipment, evacuation and communication. This procedure was done through observation and interview with hospital managers, etc. and the data were analyzed by SPSS software.

In the hospitals four dimensions of planning were studied and the following mean scores were obtained. On security, Hazrat Rasul hospital scored the highest (88.4) while Navab Safavi, Haftome Tir and Ali Asghar hospitals scored the lowest (51.4). On supplies and equipment, Navab Safavi and Haftome Tir hospitals obtained the highest score (66.6) and Hasheminejad, Shafa Yahyaeian, Firoozgar and Hazrat Rasul hospitals got the lowest score (60.0). On evacuation, Hazrat Rasul and Haftome Tir hospitals scored the highest and lowest respectively (64.2), (47.0). On communication, Hasheminejad hospital scored the highest (63.2) while Firoozgar hospital scored the lowest (36.6). In general from among ten hospitals under study the most and the least prepared hospitals were Hazrat Rasul and Navab Safavi respectively (65.65), (54.3).

The paper shows that most hospitals under study were not prepared enough against crisis and communication is found to be the weakest aspect although it is regarded as a basic principle in planning. Hazrat Rasul hospital was well prepared against crisis due to its disaster plan.

The purpose of this paper is to describe the outsourcing process in the public sector, determine the effective factors involved in this process and their priorities. The aim is to develop a generic conceptual model for the outsourcing process in public sectors.

This paper is based on the results of literature review and conducting binominal and Friedman tests. The model consists of the following steps and components: considering the organization's basic activities, evaluation of organizations' existing potentials and analyzing organizational processes, studying general outsourcing patterns, implementing and monitoring outsourcing process in terms of some critical success factors; and evaluation of outsourcing process of the organization and identifying feedbacks.

The paper determines the main components and influence factors involving in the process of outsourcing in public sectors. The generic model developed in this paper as a framework can be used to increase the efficiency and the effectiveness of the outsourcing process of organizations in public sector.

The authors believe that the proposed model and results of this research can aid public sector managers to implement their outsourcing process in a more efficient and effective manner in their organizations.

This paper develops a new generic conceptual model based on literature review, field resaech and using binominal and Frideman test. This model is unique and can be considered as an aid in the outsourcing process of organizations.

To understand the strategic importance of location selection within the organization. To analyze the constraints in decision-making for selection of location. To analyze the alternate options for a location selection. To understand the usage of the factor rating method.

Due to a countrywide anti-encroachment drive, Mr Mughal loses his shop. He had just received a notice that his shop including those of others near him was established on one of the amenity plots. The structure was declared as illegal and was to be demolished in 24 h. He had to vacate the shop and his display center to avoid the loss of his items. He along with other shop owners approached to Supreme Court of Pakistan (SCP) to stop this demolishing act and to prove that these shops belonged to them for decades and that they had already paid the price of shops at that time. However, the SCP rejected their appeal straightforward and the anti-encroachment drive was carried out. Now, Mr Mughal had to find out an alternate location to establish his display center and to resume his business operations.

Undergraduate.

Teaching Notes are available for educators only.

CSS 9: Operations and logistics.