Peer assessment in graphic design studio: Communication design students' perspectives

Large class-sizes have become a common feature in almost all higher education institutions in developing countries. Consequently, educators have to implement innovative pedagogies and assessment practices to deal with the current challenges in education delivery at that level. The purpose of this study was to examine students’ perceptions of their attitudes during peer assessment practice in graphic design studio in higher education. The study was conducted with 94 students at the Kwame Nkrumah University of Science and Technology, Kumasi, Ghana. The results showed that the students had a positive experience and perception of the peer assessment process. They also held positive views of the task worth of peer-assessment just like their perception of peer-assessment as an aid to learning. The results revealed that peer learning and objectivity are significantly related to task worth. The findings of this study have confirmed the advantages associated with the use of peer-assessment in higher education instead of a teacher centered approach and reaffirmed the existing unequivocal views held by similar studies.Keywords: Peer assessment; students’ perceptions; studio pedagogy; graphic desig

Nitrogen Fixation and Yield Potential of Some Early-Maturing Cowpea (Vigna Unguiculata (L) Walp) Lines

Field experiment was conducted at Mampong Campus of the University of Education to determine the yield and nitrogen fixation potential of some cowpea lines. Nine lines plus Asontem variety were studied in a Randomized Complete Block Design with four replications. The results showed that all the lines nodulated freely with the natural rhizobia in the soil. There was significant differences (P<0.05) in the nodulation abilities of the lines. Number of nodules negatively correlated with nodule dry weight (r= -0.38) whiles the amount of nitrogen fixed positively correlated with total seed yield (r= 0.94). Line IT97K-506-1 produced the highest number of nodules per plant but did not fix the highest amount of nitrogen. Lines IT97K-566-18 and IT97K-570-18 which contained the highest amount of nitrogen (4.43 and 4.70kgN/ha) respectively in their residue also produced the highest seed yield (3.58 and 3.61t/ha) respectively. The results showed that lines IT97K-570-18 and IT97K-566-18 have high yielding potentials and N-fixing abilities and should be tested on farmers’ fields. Key words: Cowpea (Vigna unguiculata (L) Walp), Nitrogen Fixition, Anova, Soil Fertility.

Internuclear gene silencing in Phytophthora infestans is established through chromatin remodelling

In the plant pathogen Phytophthora infestans, nuclear integration of inf1 transgenic DNA sequences results in internuclear gene silencing of inf1. Although silencing is regulated at the transcriptional level, it also affects transcription from other nuclei within heterokaryotic cells of the mycelium. Here we report experiments exploring the mechanism of internuclear gene silencing in P. infestans. The DNA methylation inhibitor 5-azacytidine induced reversion of the inf1-silenced state. Also, the histone deacetylase inhibitor trichostatin-A was able to reverse inf1 silencing. inf1-expression levels returned to the silenced state when the inhibitors were removed except in non-transgenic inf1-silenced strains that were generated via internuclear gene silencing, where inf1 expression was restored permanently. Therefore, inf1-transgenic sequences are required to maintain the silenced state. Prolonged culture of non-transgenic inf1-silenced strains resulted in gradual reactivation of inf1 gene expression. Nuclease digestion of inf1-silenced and non-silenced nuclei showed that inf1 sequences in silenced nuclei were less rapidly degraded than non-silenced inf1 sequences. Bisulfite sequencing of the endogenous inf1 locus did not result in detection of any cytosine methylation. Our findings suggest that the inf1-silenced state is based on chromatin remodelling

Covert contraceptive use among women attending a reproductive health clinic in a municipality in Ghana.

BACKGROUND: Covert contraceptive use (CCU) in sub-Saharan Africa is an indication of women's inability to exercise autonomy in their reproductive choices. The aim of this study was to assess the prevalence and determinants of CCU among a sample of FP clients in a municipality of Ghana. METHODS: We conducted a mixed method study among women attending a public reproductive health clinic in Sunyani, a city of over 250,000 inhabitants in Ghana. An initial survey inquired into sociodemographic characteristics, use of family planning (FP) methods and partner awareness of contraceptive use. The predictors of CCU were explored using logistic regressions. We used the findings to develop a guide which we applied in-depth interviews and focus group discussions with attendants at the same facility. Qualitative data analysis was conducted using a framework approach. RESULTS: We interviewed 300 women, 48 % of whom were aged between 26-33 years. The injectable was the most widely used method (56 %). The prevalence of CCU was 34 %. In multivariate analysis, single women were more likely to practice CCU than married or co-habiting women (Adjusted OR = 12.12, 95 % C.I. 4.73-31.1). Muslim and traditionalist women were similarly more likely to practice CCU than non-Muslim, non-traditionalist (Adjusted OR = 4.56, 2.29-9.06). Women who preferred to have their first or next child in 4 or more years from the time of the interview were more likely to be in CCU than women who intended to have children within 4 years of the interview (2.57; 1.37-4.83). Single women saw in covert use a statement of their social autonomy. To succeed in CCU, women wished that clinic attendance cards would not be given to them to keep at home. Though many participants saw in CCU a source of anxiety, they expected health workers to consider it and uphold confidentiality in the provision of services. CONCLUSIONS: Covert contraceptive use was high in this municipality and being single was the strongest predictor of the practice. Providers of FP services should reflect on how to adequately address the challenges faced by women who practice CCU

Trends and determinants of contraceptive use among female adolescents in Ghana: Analysis of 2003-2014 Demographic and Health Surveys.

Introduction:Thirty percent (30%) of all deliveries in 2014 were recorded among adolescents in Ghana, whom contraceptive use has been found to be low. Our study, therefore, aimed to retrospectively look at the trends and determinants of contraceptive use (modern and traditional) among female adolescents in Ghana. Materials and methods:We used data from the 2003, 2008 and 2014 Ghana Demographic and Health Surveys. The sample for this study comprised sexually active female adolescents aged 15-19 for each of the rounds thereby resulting in a sample of 426 in 2003, 389 in 2008 and 726 in 2014. We calculated the proportion of adolescents using contraceptives (either traditional or modern) for each of the three surveys. We computed the use of contraceptives among adolescents and the type of contraceptives used with respect to their socio-demographic characteristics. Multinomial Logistic Regression was used to assess the determinants of contraceptive use at 95% confidence interval and Odds Ratios (OR) and p-values were reported. Results:Contraceptive use declined from 22.1% in 2003 to 20.4% in 2014. Adolescents who were married had lower odds [OR = 0.09, 95% CI = 0.03-0.96] of using traditional methods of contraception compared to those who were not married. Those who read newspapers at least once a week were more likely to utilize modern contraceptives [OR=1.84, CI = 1.05-4.78] compared to adolescents who did not read newspapers at all. Similarly, those who watched television at least once a week were more likely to use modern contraceptives than those who did not watch television at all [OR = 2.25, CI = 1.06-4.78]. Conclusion:These findings imply that intensifying educational messages on contraceptive use among adolescents using various newspapers and television stations to convey the messages and emphasizing the importance of using modern contraceptive is worthwhile