Archives-December 

The optimality of the variance and efficiency balanced affine resolvable designs and resolvable designs with unequal block sizes has been checked and found it to be universal optimal. A method of constructing variance and efficiency balanced (?1, ?2, …..?t) resolvable balanced incomplete block design with unequal block sizes is also proposed using 2n-symmetrical factorial designs. Further optimality of the constructed design has been checked and found it to be universally optimal.

The objective of this study was to evaluate the agricultural performance in monocropping and in association of tomatoes affected by a few diseases in the city of Kisangani. The study was done following a non-randomized block device comprising two blocks of 6 plots each. Two types of crops were used namely tomato and spinach. The treatments consisted of tomatoes in pure culture and tomatoes in combination with spinach. Observations focused on the evolution of tomato diseases and the number of inflorescences, flowers, fruits, fruit weight, fruiting and yield per plant. The results obtained reveal that the combination of spinach with tomatoes reduces the spread of tomato diseases and increases tomato yield under the conditions of our study. information retrieval systems.

The challenges facing the ever frontier of knowledge in various fields especially the department of Agricultural education which includes; students difficulties in trying to adjust to the new course of study some of them did not apply for, Occupational misconception, rating of agricultural related jobs low in terms of a secured future and earning power calls for proper improvement of career counseling services in agricultural education in Nigeria Universities. However, the study centered on strategies for improving career counseling in agricultural education in south east Universities using the universities located in south east universities, three research questions and two null hypotheses guided the study using a descriptive survey. The population of study is 139, consisting of 73 lecturers of Agricultural education and 63 counselors in the universities. The entire population was used for the study since the population was manageable. Instrument for data collection was a researcher-made questionnaire duly validated and the reliability of the instrument was established using Cronbach alpha, which yielded a co-efficient index of 0.83. The researcher and 3 research assistants administered and retrieved the questionnaire. 100% return rate was achieved. Mean and standard deviations was used to answer the research questions while t-test was used to test the hypotheses at 0.05 level of significance. The analyzed data identified administrative strategies, students related strategies and government strategies as a way of improving career counseling in Nigeria universities. It was recommended among others that there should be a regular supervision, monitoring and evaluation of the career counseling services in agricultural education departments.

The deleterious effects of interruptions of hydroelectric energy damage on equipment are profound, and the adverse effect is also on worker productivity. This exploratory study was on understanding the strategies of manufacturing leaders in Zambia strategies to manage hydroelectricity interruptions and thereby also mitigate risks and reduce financial losses. Grounded in the contingency theory, the purpose of this qualitative multiple case study was to explore strategies that some manufacturing leaders use to manage hydroelectricity interruptions. The study participants for this study were six managers from different manufacturing industries based in Lusaka, Zambia, who implemented strategies to manage hydropower interruptions. Data collection involved semistructured interviews and a review of secondary sources, from the company and externally, and these ranged from company websites, and publications from the Zambia Association of Manufacturers related to managing hydroelectricity power interruptions. The analysis of data was thematic from which Four themes emerged: managing stock gaps, use of generators (turn-time), managing cost of labor input, and investment in stabilizers and storage facilities. Key recommendations include investment in alternative power-generating equipment and upgrading plant transformers. The implication for positive social change includes the potential to create jobs and improve the local economy and subsequent tax base

The effects of some organic additives to the galvanizing in amonium chloride electrolyte zinc plating baths were studied. The results show that all additives added to the plating solution shifted the potential of the zinc precipitate towards a more negative side. Additive NAP 14-90 added to the plating solution increased cathode polarization and created a coating with a wide gloss and semi-gloss range. Additives Berol 840 and o-Chlorobenzaldehyde added with NAP 14-90 improved gloss and widen the semi-gloss range. When Berol 840 and o-Chlorobenzaldehyde were added to the plating solution without NAP 14-90, the deposit distribution decreased deeply and the coating could not form at low current densities. The additives added to the plating solution changed the coating morphology. The plating samples in the solution containing the additive NAP 14-90 gived a smooth and uniform coating morphology. The sample had all three additives providing the smoothest coating morphology. The additives added to the plating solution had little effect on the plating efficiency. Additives 2 ml/L NAP 14-90 + 1 ml/L Berol 840 + 0.2 ml/L o-Chlorobenzaldehyde were selected to improve the properties of the coating and the plating process in the ammonium chloride system.

The mixed-ligand complexes, [Cu(bipy)2 (4-methylimidazole-5-carboxaldehyde)(ClO4)2 1 and Cu(bipy)2(indole-3-carboxaldehyde)](ClO4)2 2 were synthesized and characterized by employing elemental analyses, metal analyses, infrared and UV-Vis spectroscopy, room temperature magnetic susceptibility measurements, conductivity measurements and theoretical studies. The elemental and metal analyses show good agreement which support the formulation for the prepared complexes while the infrared spectroscopy revealed the coordination through both the nitrogen atom of the imidazole ring and the oxygen atom of the aldehyde group for 1. In complex 2, the coordination was through the oxygen atom only. The electronic transitions observed in the UV-Vis region show the various intraligand transitions and the d-d transitions at 14,347cm-1 with a shoulder at 11,115 cm-1 for 1 and for 2 the bands are 13,642 cm-1 and 11,494 cm-1. The magnetic moments 1.44B.M (1) and 1.34B.M (2) show antiferromagnetic properties of the complexes. From the theoretical studies, the Binding energies (Stabilization Energies) are found to be -33.85 (-466.46) kcal/mol and -32.73 ( -465.17) kcal/mol for 1 and 2 respectively. Therefore, the theoretical calculations corroborated the formation of a six –coordinate complex in 1 and a five –coordinate geometry around the Cu ion in 2. The conductivity measurement revealed that the complexes are 1:2 electrolytes.

Corporal Punishment was outlawed in Kenya in line with the Children’s Act of 2001. Consequently, alternative forms of discipline were recommended in our Schools. The purpose of this study was to investigate teachers’ perception on the effectiveness of the forms of alternative discipline used in Kajiado County, Kenya. This study was guided by the following objectives: Teachers’ perception of the effectiveness of alternative forms of discipline; exploration of challenges that teachers face in administering these forms of discipline in Kajiado County. This study comprised all public secondary school teacher counsellors, and disciplinary Committee teachers. Twenty participants were selected using purposive sampling technique. Qualitative research approach, and phenomenological design were used in this study. Data was generated using a structured interview guide, and analyzed thematically. Verbatim analysis was used to report direct quotations from the statements made by the participants to capture their strong feelings about the phenomenon. The study revealed that alternative forms of discipline were effective in behavior modification. This study also found out that, lack of counseling rooms, uncooperative teacher attitude, an overloaded curriculum, inconsistence in disciplining students, blurred role of teacher counsellor, and untrained teacher counsellors were challenges that schools faced in the implementation of alternative forms of discipline in schools. Teachers suggested that workshops should be conducted to make them aware of the alternative forms of discipline. The findings of this study will be useful to head-teachers, teachers and policy makers in education in terms of formulation of policy guidelines.

The IR and HPLC analysis of bougainvillea flower extract revealed that it contains nitrogenous compounds, a novel betaxanthin, methyl (derivative of arginine betaxanthin) on the basis of UV-Vis spectra and mass spectrometric characteristics, as well as by comparison with literature data, which to the best of our knowledge has not been reported in bougainvillea flower extract. bougainvillea flower extract was the major betacyanin pigment present although methylated arginine betaxanthin, a novel betaxanthin hitherto not observed naturally and betalamic acid were also present. The identified compounds were then evaluated for anti-corrosive properties by the cyclic-voltammeter and potentiometer method.

The aim of this study is to examine the difference between attachment styles and early maladaptive schemas among depressed patients with previous suicidal intention and without any previous suicidal intention with normal population in the city of Kerman. A sample of 90 patients has been selected for this purpose. This statistical sample consists of 30 depressed patients with previous suicide intention, 30 depressed patients without previous suicide intention, and 30 nonclinical populations. The sampling method was convenience method. In order to collect the research data, the short questionnaire of Young and the questionnaire of adult attachment styles have been used. Multi-variable variance analysis and Tukey method have been employed in the SPSS for analyzing the research data and testing the research hypotheses. The findings of this study revealed that there is a significant difference between scores of schemas and attachment style among three sample groups. The results also revealed that there is a significant difference between two clinical and nonclinical groups in terms of schemas except devotion and strict criteria. Another part of the results revealed that there is a significant difference between two clinical groups in terms of insufficient restraint/self-discipline, fault/shame, vulnerability toward damage and illness, and captive. Also a significant relationship has been observed between unsafe attachment (avoidance) styles and potential suicide of the depressed people.

The effect of polyvinyl alcohol (PVA) having molecular weight 16,000u in alkaline non-cyanide zinc plating bath on the characteristics of zinc plating process has been investigated. The SEM images indicated that zinc particles produced in plating bath were either in block form if plating bath without PVA or in slice form if plating bath with PVA. The size of zinc particles depended on PVA concentrations in plating bath. If the content of PVA in plating bath increased, the zinc grain size reduced. Hull Cell tests also illustrated that surface of zinc deposition improved for plating bath with PVA. Semi-bright scope of zinc plated coating expanded if the PVA concentration in plating bath grew. However, bright scope did not appear in all samples from plating bath with various concentrations of PVA. It was reasonable due to PVA playing a role as primary additive for zinc plating as other authors confirmed. Interestingly, cathodic polarizations were increased in presence of PVA. Throwing power increases significantly with increasing PVA concentration.