Human Capital Development as Correlates of Librarians’ Productivity in Nigerian Public University Libraries

The study examined human capital development in relationship with the productivity of librarians in the Nigerian public university libraries. It employed survey research design to investigate 923 librarians in 54 public university libraries. A self-developed questionnaire was adopted and it gave a reliability coefficient of 88% to Human Capital Development and 94% to Productivity. A response rate of 67.2% was achieved. Data were analysed using descriptive and inferential statistics. It was revealed that human capital development will boost the productivity of librarians. It concluded that effective human capital development of librarians would greatly enhanced librarians’ job performance in the university libraries. The study recommended that library management should continue in developing her professional workforce so as to satisfy various clienteles in the university community

Tinjauan Ulang Sistem Pemindaian Termal Tubuh Manusia dengan Sensor Suhu Pyroelectric

Elemen sensor pyroelectric sangat sensitif terhadap jangkauan lebar radiasi dan sudut jatuh incoming radiasi panas badan manusia pada panjang gelombang 5-15 µm [1]. Signal respon sensor pyroelectric dapat didekatkan oleh dua buah grafik exponensial sebagai akibat Perubahan kapasitansi dalam amplifier. Waktu naik dan turun dari signal tegangan dapat ditentukan oleh (tetapan waktu elektrik) dan (tetapan waktu termal) yang sebelumnya telah melewati bandpass filter. Dalam tulisan ini, akan dijelaskan secara rinci semua aspek yang menyangkut sistem pemindaian termal tubuh manusia dengan sensor suhu pyroelectric. Pyroelectric sensor element is very sensitive to a wide range of incoming radiation and heat radiation angles of the human body at 5-15 μm wavelength [1]. The response signal of the pyroelectric shown by two exponential graph as a result of changes capacitance in the amplifier. Rise and fall time of the voltage signal can be determined by the (electric time constant) and (thermal time constant) through a bandpass filter. In this paper, will be explained in detail how Infrared motion detector components work

ENHANCING OF STUDENTS’ MATHEMATICAL REFLECTIVE THINKING ABILITY THROUGH KNOWLEDGE SHARING LEARNING STRATEGY IN SENIOR HIGH SCHOOL

This study aims to find out enhancement of students’ mathematical reflective thinking ability through knowledge sharing learning strategy in Senior High School. The method of study used quasi experiment by non-equivalent control group design. The population of this study are eighth grader students of Senior High School in Tangerang City, Banten Province. Sampling technique used cluster random sampling with the numbers of students are 140 students. The instruments used in the form prior mathematical knowledge test and mathematical reflective thinking ability test. Data analysis are done by requisite test, namely data normality test (Kolmogorov-Smirnov Z Test) and homogeneity test (Levene Test). The statistic analysis of the data was conducted with one-way ANOVA, two-way ANOVA, and Scheffe Test. The results of study are as follows: (1) there is enhancement difference of mathematical reflective thinking ability of the students learning with knowledge sharing strategy and conventional learning; (2) there is enhancement difference of mathematical reflective thinking ability between students learning with knowledge sharing strategy (KSS) and conventional learning based on school level and prior mathematical knowledge (MPK) of students (higher, middle, lower); (3) The interaction between learning strategy (KSS) and prior mathematical knowledge (higher, middle, lower) influenced student’s enhancement of mathematical reflective thinking ability

Aplikasi Data Warehouse untuk Menunjang Standar 3 Borang Akreditasi Prodi Informatika Universitas Mercu Buana

Dalam rangka meningkatkan kualitas pendidikan secara berkelanjutan baik input, proses maupun output dalam suatu program studi, diperlukan aplikasi yang dapat mendukung bisnis proses. Untuk mengatasi hal tersebut diperlukan solusi dasar dalam pembuatan laporan borang akreditasi khususnya standar 3 yang dapat mendukung proses pengambilan keputusan strategis untuk tingkat manajemen. Model pengambangan data warehouse yang digunakan dalam penelitian ini adalah model skema star. Hal ini akan menghasilkan suatu sistem informasi data warehouse yang dapat digunakan untuk menghasilkan informasi yang dibutuhkan dalam pengisian borang akreditasi. Data warehouse dapat menyajikan data dengan lebih cepat sesuai dengan kebutuhan serta menghasilkan informasi yang lebih ringkas. Kemudian dengan bantuan aplikasi data warehouse dapat juga dilakukan analisis multidimensi dan dapat menghasilkan informasi yang bersifat analistis, sehingga bermanfaat dalam pengambilan keputusan selanjutny

Modelling Long-Range Dependence and Non-linearity in the Infant Mortality Rates of African Countries.

Infant mortality rates in 34 Sub-Saharan African countries (1960–2016), obtained from the Federal Reserve Bank of St. Louis database, were examined in this paper by focusing on the degree of persistence and non-linearities in the growth rate series. Persistence deals with the degree of association between the observations. Non-linearity occurs when departing from the linear assumption as in a time trend. These two issues are relevant in this context because they are intimately related. Based on the high degree of persistence observed in the series examined, instead of investigating structural breaks, which produce abrupt changes in the data, a non-linear approach was used based on Chebyshev polynomials in time, producing smooth rather than abrupt changes. This approach has never been examined in a unified framework in the treatment of infant mortality rates. The results indicate that half of the countries examined display non-linearities and the orders of integration of the series are extremely large in all cases, being around two in the majority of them. Looking at the growth rate series, significant negative trends were observed for: Chad, Equatorial Guinea and Mozambique. Evidence of mean reversion and thus transitory shocks, were observed for Lesotho, Rwanda, Botswana and Mozambique. Time dynamics of the series were expected to persist in order to ascertain the decline in mortality rates. Therefore, serious government interventions are required in managing infant health in these countries.pre-print314 K

Bromination of Graphene and Graphite

We present a density functional theory study of low density bromination of graphene and graphite, finding significantly different behaviour in these two materials. On graphene we find a new Br2 form where the molecule sits perpendicular to the graphene sheet with an extremely strong molecular dipole. The resultant Br+-Br- has an empty pz-orbital located in the graphene electronic pi-cloud. Bromination opens a small (86meV) band gap and strongly dopes the graphene. In contrast, in graphite we find Br2 is most stable parallel to the carbon layers with a slightly weaker associated charge transfer and no molecular dipole. We identify a minimum stable Br2 concentration in graphite, finding low density bromination to be endothermic. Graphene may be a useful substrate for stabilising normally unstable transient molecular states

POE2WE Learning Management Based on Google Classroom Blended Learning (Alternative Models in Learning during WFH Pandemic Covid-19)

This study aims to describe the application of the POE2WE model based on blended learning using Google Classroom media to increase student interest during the WFH Pandemic Covid-19 Period. Along with the lack of mastery of technology by educators as well as the lack of mastery of the material delivered by educators to students. Therefore, learning has not maximally impacted student interest in learning. For this reason, there is a need for models and methods from educators to increase student interest in learning, one of which is to use blended learning methods and POE2WE learning models using the Google Classroom media. The results of the study indicate that the application of the POE2WE model based on Blended Learning with Google Classroom media can be used as a solution to the problem in the WFH Pandemic Covid-19 Learning Process

Phytochemical studies of Melilotus officinalis

GC-MS analysis of the n-hexane extract of Melilotus officinalis seeds revealed twelve compounds with a combined area percentage of 98.33% predominantly, (9Z,12Z)-octadecadienoic acid (20.22%, 366 ppm), 14-methylpentadecanoic acid (19.52%, 353 ppm) and (9E)-octadecenoic acid (15.94%, 289 ppm). Two compounds, namely, cis-coumaric acid-2-O-β-D-glucopyranoside (cis-melilotoside, 1) and 1,2-benzopyrone (coumarin, 2), were isolated from the MeOH extract of the seeds of M. officinalis. The structures of isolated compounds were determined by spectroscopic techniques such as NMR, UV-Vis, and FTIR. The MeOH extract of M. Officinalis was also tested for its antioxidant activity using DPPH assay. The extract showed 29.87% DPPH inhibition at concentration of 100 μg/mL.                     KEY WORDS: Melilotus officinalis, Fatty acid methyl esters, Esterification, GC-MS, DPPH radical scavenging assay, Antioxidant activity   Bull. Chem. Soc. Ethiop. 2021, 35(1), 141-150. DOI: https://dx.doi.org/10.4314/bcse.v35i1.1

Cosmos caudatus Kunth. extract reduced number of microflora in oyster mushroom (Pleurotus ostreatus)

Nowadays consumer is more demand on natural foodstuff instead of synthetic product due to their concern on health. The objective of this study is to investigate the effect of C. caudatus extract on the number of microflora in oyster mushroom at different concentration of C. caudatus extract and exposure time using dilution method. The results showed that the number of microorganisms (Log10 CFU/g) in oyster mushroom in term of Total Plate Count (TPC), Bacillus cereus, Escherichia coli and Staphylococcus aureus were 6.13 ± 0.04, 6.15 ± 0.09, 5.97 ± 0.04, and 6.46 ± 0.00, respectively. The effect of C. caudatus extract on microflora in oyster mushroom at concentrations of 0.00%, 0.05%, 0.5%, and 5.0% with exposure time of 0, 5, 10, and 15 min demonstrated that the reduction number of microflora in oyster mushroom was dependent on the concentration of C. caudatus extract and exposure times. The number of TPC (Log10 CFU/g) in oyster mushroom was significantly reduced after treated with C. caudatus extract at concentration of 0.05% for 15 min; 6.13 ± 0.04 reduced to 2.62 ± 0.07. Moreover, B. cereus (Log10 CFU/g) in oyster mushroom was significantly reduced by treatment of C. caudatus extract at concentration of 0.05% for 5 min; 6.15 ± 0.09 reduced to 3.77 ± 0.15. Meanwhile, the number of E. coli (Log10 CFU/g) in oyster mushroom was significantly reduced at concentration of 0.05% for 10 min; 5.97 ± 0.04 reduced to 3.21 ± 0.13. Lastly, the survival number of S. aureus in oyster mushroom was significantly reduced after treated with C. caudatus extract at concentration of 0.05% for 15 min; 6.46 ± 0.00 reduced to 4.83 ± 0.07. In conclusion, C. caudatus extract has potentiality to be developed as natural sanitizer for rinsing raw food materials such as oyster mushroom