Higher College of Technology

About: Higher College of Technology is a based out in . It is known for research contribution in the topics: Higher education & Tourism. The organization has 369 authors who have published 379 publications receiving 729 citations.

An overview of the geology of Tanga onshore basin: implication for hydrocarbon potential, Tanzania, East Africa

Abstract: Tanzania, like other East African countries, is seeking to increase its hydrocarbon discoveries from both onshore and offshore sedimentary basins. Although the Tanga onshore basin has the potential of adding to the hydrocarbon reserve of the country, it has very scanty literature to guide preliminary investigations into the basin prospectivity. This review seeks to highlight the petroleum system elements within the basin and how worthy it is exploring for its hydrocarbons potential. The general geology of the basin seems to have characteristics of a complete petroleum system with dolomitic limestone as source rocks and an obvious shale source rock and evidences of fossils and oil seepage around Kivundo River, although further research is needed to validate this assumption. Feldspathic sandstones are present to serve as a reservoir to economic hydrocarbon reserves. The basin has suitable thickness to provide the needed temperature and pressure for thermal maturity of any existing organic matter (OM) and to expel them from their various ‘kitchens’. Brittle structures are available to facilitate the migration of expelled kerogens. Structural straps are available via micro-folds and faults, to ensure accumulation of economic quantities that could be explored and exploited at profit. Also, the Tanga onshore basin has geological analogies that are similar to other basins’ hydrocarbon discoveries including that in Rovuma, Morondava and Songo Songo basins which are to the south of Tanga onshore basin.

Improved Authentication in Secured Multicast Wireless Sensor Network (MWSN) Using Opposition Frog Leaping Algorithm to Resist Man-in-Middle Attack

Abstract: Wireless Sensor Networks (WSNs) in modern times enables security techniques to secure the information transmitted via the interconnected network. The poor security services in WSN environment erupts to more attacks and misbehavior of nodes. Hence, it requires an effective security mechanism that should avoid the degradation of network performance with security flaws. In these regards, the sensor node authentication becomes critical with increased attacks and threats, and with increasing communication between the sensor nodes. Hence, the complexity associated with security protocols increases and that enables the networks to misbehave. In this paper, we design a light-weight authentication mechanism using a dual topology in multicast WSNs. It is the authentication is improved using EdDS Algorithm (EdDSA) with an XOR functionality. Finally, the uncertainty in choosing the misbehaving nodes for further communication is optimally found by a theoretical game model. This avoids the illegitimate access of non-malicious nodes in multicast environment, while it ensures fastest authentication. In this way, the authentication of the nodes in the network is tested and validated against man-in-middle attack. The simulation results show that the proposed EdDSA-XOR functionality has 0.13% and 0.07% of reduced time consumption and reduced energy consumption, respectively than other methods.

Nonionic surfactant vesicles as a novel drug delivery system for increasing the oral bioavailability of Ginsenoside Rb1

Abstract: In the present study, a novel nonionic surfactant vesicles (NSVs) system consisting of cholesterol, Tween 80 and Span 80 was developed for the delivery of Ginsenoside Rb1 with an improved oral bioavailability. The prepared vesicles were hollow and spherically shaped with acceptable diameter (264.68 ± 4.17 nm), zeta potential (−11.58 ± 0.87 mV) and encapsulation efficiency (69.034 ± 0.045%). XRD analysis provided affirmed the encapsulation of Rb1 in the vesicles. The in vitro release profile of Rb1 from the vesicles in the two different media (double distilled water, pH 7.0, phosphate buffer solution, pH 7.4) showed statistical insignificant difference when compared with the free Ginsenoside Rb1. Notably, the pharmacokinetic analysis of optimized Ginsenoside Rb1-NSVs exhibited a higher Cmax (9.55 ± 0.5 μg/mL versus 6.22 ± 0.53 μg/mL) with 1.82-fold increase in relative oral bioavailability. Collectively, these findings revealed that the developed vesicles could be a novel alternative in improving the oral bioavailability of Ginsenoside Rb1 and extending its application in the clinical setting.

Impact of iron fortification on anaemia and iron deficiency among pre-school children living in Rural Ghana.

Abstract: Anaemia in young sub-Saharan African children may be due to the double burden of malaria and iron deficiency. Primary analysis of a double-blind, cluster randomized trial of iron containing micronutrient powder supplementation in Ghanaian children aged 6 to 35 months found no difference in malaria risk between intervention and placebo groups. Here, we performed a secondary analysis of the trial data to assess the impact of long-term prophylactic iron fortificant on the risk of iron deficiency and anaemia in trial subjects. This population-based randomized-cluster trial involved 1958 children aged between 6 to 35 months, identified at home and able to eat semi-solid foods. The intervention group (n = 967) received a daily dose containing 12.5 mg elemental iron (as ferrous fumarate), vitamin A (400 μg), ascorbic acid (30 mg) and zinc (5 mg). The placebo group (n = 991) received a similar micronutrient powder but without iron. Micronutrient powder was provided daily to both groups for 5 months. At baseline and endline, health assessment questionnaires were administered and blood samples collected for analysis. The two groups had similar baseline anthropometry, anaemia, iron status, demographic characteristics, and dietary intakes (p > 0.05). Of the 1904 (97.2%) children who remained at the end of the intervention, the intervention group had significantly higher haemoglobin (p = 0.0001) and serum ferritin (p = 0.0002) levels than the placebo group. Soluble transferrin receptor levels were more saturated among children from the iron group compared to non-iron group (p = 0.012). Anaemia status in the iron group improved compared to the placebo group (p = 0.03). Continued long-term routine use of micronutrient powder containing prophylactic iron reduced anaemia, iron deficiency and iron deficiency anaemia among pre-school children living in rural Ghana's malaria endemic area.

Impact of NEMS Technology over the growth of IoT -A Analysis study

Abstract: The semiconductor enterprise will continue to be a critical motive force inside the international prevalent financial system as society turns into an increasing number of relaxation on cell gadgets, the Internet of Things (IoT) emerges, enormous quantities of statistics produced need to be stored and analyzed, and excessive overall performance computing develops to care vital interests in Science, Medicine, Engineering, Technology and Industry. The miniaturized Nano gadgets are the most important element inside the modernized automation which can be speaking with themselves to present answers in a better manner for the technical issues. Thissort of introduced characteristic makes it to create novelty over various fields using downscaling their dimensions near or underneath 1 $\mu$ m. The software segmentation for the NEMS marketplace is broadly divided into three groups; Design, Measurement system and solid-state electronics. Each of the packages is divided into level two packages such as microscopy, automotive, clinical, sensors, and memories. Our analysis mainly focuses on the overall performance and functionalities of the NEMS era utilized in the Internet of Things.