Neutron Transfer Dynamics and Doorway to Fusion in Time-Dependent Hartree-Fock Theory

We analyze the details of mass exchange in the vicinity of the Coulomb barrier for heavy-ion collisions involving neutron-rich nuclei using the time-dependent Hartree-Fock (TDHF) theory. We discuss the time-dependence of transfer and show that the potential barriers seen by individual single-particle states can be considerably different than the effective barrier for the two interacting nuclei having a single center-of-mass. For this reason we observe a substantial transfer probability even at energies below the effective barrier.Comment: 6 pages, 9 figure

Synthesis, characterization and sorption potentials of dialdehyde starch aminophenol Schiff’s base

Extraction of native cassava starch, its oxidation, modification and chelation of the products were achieved. Schiff’s base type Dialdehyde aminophenol was prepared by the reaction of orthoaminophenol and dialdehyde starch from periodate oxidized cassava starch. The modified starch aminophenols with different aldehyde content were tested for their adsorptive affinity for Cu(II), Cr(II) and Mn(II) ions. The modified starch was characterized by Fourier transformed infrared (FT-IR) spectroscopy, Scanning electron microscopy (SEM), elemental analysis, solubility test, Magnetic susceptibility and magnetic moment and, melting/decomposition temperature. The modified starches and the polymeric complexes have been found to have an improved physicochemical properties and the polymeric chelating ligand could be used to remove Cu(II), Cr(II)and Mn(II)ions from aqueous solution. Also the polymeric complex was found to have good cross linking ability when reacted with the metal salt.Keywords: Dialdehyde starch, Native Starch, Orthoaminophenol, Polymeric Chelating ligand, Sorptio

Epiphyseal plate closure of radio-ulna bone in red Sokoto goat ecotype

This study was conducted with 57 Red Sokoto goats, which were randomly obtained from three different small ruminant farms with birth record within Sokoto metropolis, Nigeria. They were classified into different age groups and subgroups, from 1-144 weeks. The radiographs of their forearms were taken and the proximal and distal epiphyseal plate lengths of both radius and ulna bones were measured. The radiographic images of the bones showed that the proximal and distal epiphyseal plates of the radius were opened at week 1 with mean lengths of 0.50±0.05mm and 1.10±0.01mm respectively but fuses at week 8 and 36 respectively. The proximal ulna epiphyseal plate was opened at week 1, with mean length of 1.67±0.02mm and fused at week 144. However, the distal ulna epiphyses appeared radiolucent at week 1 and 2 and became radiopaque at week 3 with an epiphyseal plate mean length of 3.67±0.26mm which reduced chronologically and fused at 96 week. It was therefore concluded that in Red Sokoto goat, epiphyseal plate lengths decreases with increase in age and fuses at different age even within the same bone, and the epiphyseal plates of radius bones fuse earlier than the ulna bones.Keywords: Epiphyseal plate, Red Sokoto goat, Radiography, Radius, Uln

Comparison of change-points in multivariate statistical process control using the performance of Lapage-type (nonparametric)

The inability of the Shewhart‟s, the EWMA, and the CUSUM, Hotelling‟s T2 and many other control charts to indicate the time of shift poses great problems in production, Medicine, etc. To overcome the problems the need to identify the period of change (shift) in the process becomes inevitable. The study used Lapage-type Change-point (LCP) to detect the simultaneous shift in both mean and variance. In the study we compare the performance of generalized likelihood ratio change-point (GLRCP) a parametric-base with our proposed method (LCP) at different varying start-ups using real life data. We run the data on Normal, Laplace and Lognormal distributions and also Average Run Length (ARL0) to assess the performance of the methods. Evaluating in-control ARLs (IC-ARLs) for each of the methods at change-point 250 and ARL0 500 indicates the same performance irrespective of the start-up value; LCP and GLR methods have rather a similar performance IC-ARLs at change-point 50 and change-point 100 under the normality assumptions, but under non-normal distributions, LCP has substantially higher IC-ARLs compared to GLRCP at 20. The LCP outperformed the GLRCP when applied to children bronchial pneumonia status. We therefore recommend that new method be used in short-run situations and also when underlying distributions are usually unknown

Multiangulation position estimation performance analysis using a Bartlett’s Beamforming Method

In this work, a complete multiangulation system was developed and its performance in term of position estimation (PE) was determined. The developed system uses Bartlett’s beam forming method to estimate AOA of the signal impinging on the 16-element sensor array in a uniform linear array (ULA) geometry at each ground receiving station (GRS). The AOA measurements are then used as input to a linear angulation algorithm for PE. The PE accuracy of the developed system was determined using Monte Carlo simulation and compared with the directional rotating antenna multiangulation system using a square GRS configuration. Simulation results shows that the developed multiangulation PE error is 50% lower than that of the directional rotating antenna system. Furthermore, the PE error of the developed system is higher for emitting sources within the system coverage with position bearings within 610 to 1200 and 2400 to 3000 than other emitting source locations.Keywords: multiangulation system, position estimation, beam forming, Monte Carlo Simulation, position bearin

Determination of some heavy metal content in tilapia and cat fish species in Lake Njuwa, Adamawa State, Nigeria

Concentration (mg/kg) of Lead (Pb), Chromium (Cr), Copper (Cu), Nickel (Ni) and Cadmium (Cd) were measured in various organs (such as gills, bones and muscles) of Tilapia and Catfish collected from Lake Njuwa Adamawa state during dry season (February, 2017) and wet season (August, 2017). The results obtained were compared to permissible limits set by World Health Organization, WHO (1985), Food and Agricultural organization, FOA (2003), to ascertain its health implications. Comparison between the heavy metals concentration of dry and wet season were carried out using Mann Whitney u test, the relationship between the heavy metal concentration and the weight of the fish was carried out using Pearson correlation test. All the analysis were determined at significant level of p>0.05 using Microsoft excel 2010 and statistical package for social science (SPSS) 2.3. The results obtained shows that the heavy metals are more concentrated in the bones (2.30, 2.50, 1.37, and 1.40) than the gills (2.17, 2.20, 1.19 and 1.23) and the muscles (0.5, 0.7, 0.99 and 1.03) of both the Tilapia and Catfish during the wet season than the dry season.Keywords: Heavy metal, Tilapia fish, Catfish, Lake, dry season, wet seaso

Traumatic diaphragmatic hernia in a 2-year old Nigerian female mongrel dog

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Isolation and characterization of Pseudomonas aeruginosa and Brevibacillus species and their potential to biodegrade polyethylene material

This study was conducted to screen for Pseudomonas aeruginosa and Brevibacillus species from soil and investigate their ability to biodegrade low density polyethylene materials. The organisms were isolated using phenotypic characterization and molecular identification by polymerase chain reaction (PCR). The PCR confirmed the presence of two different strains of Pseudomonas aeruginosa and absence of Brevibacillus specie from the soil sample. The bacteria were inoculated in a nutrient broth to which 2% polyethylene was amended for a period of three weeks in a shaker incubator at 180rpm. Effect of temperature, pH and concentration of polyethylene on the biodegradation process was also studied. The initial and final dry weights of the polyethylene were recorded and the % degraded was calculated. It was found that both strains of Pseudomonas aeruginosa were capable of degrading the polyethylene. Strain C3 produced a maximum degradation of 20% at 37°C and pH 6. Strain B3 achieved a maximum degradation of 15% at 37°C at pH 6 and 7. In addition, it was found that both strains of Pseudomonas aeruginosa were able to survive up to 6% of polyethylene producing a maximum degradation of 55%. Therefore strains B3 and C3 of Pseudomonas aeruginosa can be effective in biodegradation of polyethylene in dump sites if their potentials are well exploited

Determination of sex using demarking points of the calf and skinfold thickness among Bauchi State students in University of Maiduguri, Nigeria

The aim of the study was to estimate sex using demarking points and index of sexual dimorphism of the calf and skinfold thickness among Bauchi State students in University of Maiduguri, Nigeria. The study was carried out using 194 subjects (100 males and 94 females) with  age ranged from 18 to 39 and 18 to 35 years  respectively with no structural deformity or fracture. The following parameters were measured (standing height, weight, calf height, upper one-third calf circumference, medial and lateral calf skinfolds). The results showed that standing height, weight, calf height, upper one-third calf circumference, medial and lateral calf skinfolds in males were 1.70m, 62.08kg, 43.68cm, 32.15cm, 4.70mm and 6.15mm respectively, while female counterparts had 1.58m, 60.22kg, 35.98cm, 35.23cm, 10.33mm and 13.46mm respectively. There were significant differences between males and females standing height, calf height, upper one-third calf circumference, medial and lateral calf skinfolds (p < 0.05) but no significant differences in weight (p > 0.05). Index for sexual dimorphism and demarking point were calculated and all the parameters were observed to be sexually dimorphic. In conclusion, males have higher values for height and weight, while the females have higher values for the calf height, upper one-third calf circumference, medial and lateral calf skinfolds

Quadrupole resonances in unstable oxygen isotopes in time-dependent density-matrix formalism

The strength functions of quadrupole modes in the unstable oxygen isotopes 22O and 24O are calculated using an extended version of the time-dependent Hartree-Fock theory known as the time-dependent density-matrix theory (TDDM). It is found that TDDM gives the lowest quadrupole states which are energetically shifted upward and become significantly collective due to the coupling to two-body configurations. It is pointed out that these features of the lowest quadrupole states are similar to those obtained in the quasi-particle random phase approximation.Comment: 6 pages, 6 figure