GALACTIC COSMIC RAY VARIABILITY IN THE HIGH AND MID LATITUDES DURING SOLAR CYCLES 22 AND 23 ABSTRACT Galactic cosmic rays are modulated in the heliosphere primarily due to the global merged interaction regions with intense magnetic field which leads to a decrease in the galactic cosmic rays throughout the heliosphere. Using long term averages of …
GEOPHYSICAL INVESTIGATION OF ABAKALIKI AREA USING AEROMAGNETIC METHOD ABSTRACT Aeromagnetic data over Abakaliki area of the lower Benue trough of Nigeria was interpreted qualitatively and quantitatively using Oasis montaj software (version: 6.4.2 H.J).The interpretation unveiled basic intrusive bodies like dyke, lacolyte and batholyte in the study area. It also showed fault zone which trends …
IMPLICATIONS OF RADIO PULSAR CRUST SIZE ON ITS BRAKING INDEX ABSTRACT There are several obvious observable evolutionary evidence among all the population of known pulsars, but a consistent description of this evolutionary trend is generally lacking in the literature. In this study, we provide a consistent interpretation of this evolutionary effect, on the ground that …
INVESTIGATING THE ANNUAL AND SEMI-ANNUAL VARIATIONS OF GEOMAGNETIC FIELD COMPONENTS IN THE NORTHERN HEMISPHERE ABSTRACT A study of the ever present ring current on the geomagnetic field strength is used to determine the annual and semi-annual geomagnetic activity variation and validate Russell-McPherron hypothesis. The D, H and Z geomagnetic field component mean monthly and yearly …
INVESTIGATING THE EFFECTS OF LEACHATE ON GROUNDWATER REPOSITORIES IN MAJOR DUMPSITES OF AKWA IBOM STATE, NIGERIA, USING INTEGRATED APPROACH ABSTRACT Integrated study involving electrical resistivity method and physicochemical analysis of water samples was carried out to investigate the effect of dumpsite leachate on groundwater repositories around the dumpsites in Ikot Ekpene, Uyo and Eket Local …
LONG – TERM ROTATIONAL STABILITY OF SOME ISOLATED RADIO PULSARS ABSTRACT We re-examined the phenomenon of rotational instability in radio pulsars on decadal timescales using a sample of 315 radio pulsars whose spin-rates [rotation period (P) and spin-down rate ( Pı) ] have been measured on, at least two different epochs. The first stage of …
MICROWAVE ASSISTED SYNTHESIS OF ZNO AND TIO2 PHOTO-ELECTRODE FOR DYE SENSITIZED SOLAR CELL ABSTRACT Dye sensitized solar cells (DSSCs) have been under extensive research. Since the color of the device can be easily varied by choosing different dyes and cells on flexible substrates, DSSCs are especially attractive for Building Integrated Photovoltaics (BIPV). The cell concept …
SEMIANNUAL VARIATION OF DST-RELATED DISTURBANCE AND ASSOCIATION WITH SOLAR AND GEOMAGNETIC ACTIVITY ABSTRACT A study of the semiannual variation of the Monthly mean Dst-related disturbance in H and Z components of the geomagnetic field has been carried out. Magnetograms from fifteen (15) geomagnetic stations in the high- mid- and low latitudes, and which includes three …
STUDY OF LATTICE DYNAMICS AND PRESSURE DEPENDENCE OF PHONON FREQUENCIES OF ZINC BLENDE ZNS TO 13.4 GPA ABSTRACT The phonon dispersion of zinc sulphide (ZnS) in zinc blende structure has been investigated using ab initio calculations based on the density functional perturbation theory within the generalized gradient approximation (GGA) of exchange correlation functional as implemented …
SYNTHESIS AND CHARACTERIZATION OF NANOSTRUCTURED ZINC OXIDE THIN FILMS USING AQUEOUS CHEMICAL METHOD ABSTRACT In this work, we report on the synthesis of Zinc Oxide (ZnO), by a cost effective and low temperature aqueous chemical method on conducting glass substrates. The grown nanostructures have been characterized by X-ray diffraction analysis (XRD), scanning electron microscopy (SEM), …
AN INVESTIGATION OF SUBSURFACE STRUCTURES FOR CONSTRUCTION PURPOSE IN MAKURDI, USING ELECTRICAL RESISTIVITY SURVEY ABSTRACT An electrical resistivity survey was carried out on site proposed for the construction of state secretariat office complex in Makurdi, Benue state, using vertical electrical sounding (VES) with Shlumberger electrode configuration. The soundings, which comprised of fifteen VES was …
AN INVESTIGATION OF SUBSURFACE STRUCTURES FOR CONSTRUCTION PURPOSE IN MAKURDI, USING ELECTRICAL RESISTIVITY SURVEY ABSTRACT An electrical resistivity survey was carried out on site proposed for the construction of state secretariat office complex in Makurdi, Benue state, using vertical electrical sounding (VES) with Shlumberger electrode configuration. The soundings, which comprised of fifteen VES was …
ANALYSIS OF GLITCH ACTIVITY IN ROTATING NEUTRON STARS ABSTRACT A total of 660 discrete jumps in the rotation frequency (ı) and the spin-down rate (ı)ı of about 140 pulsars were studied. Out of the 660 discrete jumps, 394 were classical glitches (the so-called macroglitches) and 266 were microglitches. The objects are grouped into normal radio …
COMPARATIVE ANALYSIS OF CALCULATED AND MEASURED ENTRANCE SKIN DOSE OF COMMON RADIOGRAPHIC PROCEDURES IN BENUE STATE TEACHING HOSPITAL MAKURDI, BENUE STATE ABSTRACT The Entrance Skin Dose (ESD) for common radiographic examinations of forty (40) patients was measured prospectively at the Benue State University Teaching Hospital, Makurdi using LiF thermo-luminescent dosimeter (TLD) chips. The examination comprised …
CONSTRUCTION OF X-S BAND FOR NIGERIASAT-2 MISSION CONTROL CENTRE AND VALIDATION OF DATA FROM THE SATELLITE ABSTRACT A fully automated X/S band Mission Control Centre (MCC) for the Nigeriasat-2 (N2) and Nigeriasat X (NX) satellites was constructed in Abuja. The construction of the MCC consisted of the installation of the appropriate size of antenna and …
COSMIC RAYS VARIABILITY IN THE MID AND HIGH LATITUDES DURING SOLAR QUIET DAYS ABSTRACT We have studied the variability of Cosmic rays flux during solar quiet days at mid and high latitudes. By using the five (5) quietest days for each month, the monthly mean diurnal variation of cosmic ray anisotropy have been derived for …
EFFECT OF INTERSTELLAR MEDIUM ON RADIO PULSAR SPIN-DOWN PROPERTIES ABSTRACT A statistical analysis of a large sample of 668 radio pulsars was undertaken in other to investigate the possible dependence of interstellar medium (ISM) parameters [dispersion measure (DM) and rotation measure (RM)] on pulsar spin-down parameters [rotation period ( P) and spin-down rate ( )]. …
EFFECT OF MAGNETIC FIELD ON THE THERMAL CONDUCTIVITY OF SINGLE CRYSTAL OF YBA2CU3O7- ABSTRACT This research investigated the effect of magnetic field on the thermal conductivity of high temperature type II superconductors. The result suggested that the thermal conductivity of high temperature type II superconductor YBa2Cu3O7- decreases as the applied magnetic field increases at a …
EVALUATION OF RADIOPROTECTIVE EFFECT OF GONGRONEMA LATIFOLIO LEAF EXTRACT ON WHOLE-BODY IRRADIATED WISTAR ALBINO RATS ABSTRACT The purpose of the study was to evaluate the radioprotective effects of Gongronema latifolio (GL) leaf extract on a whole-body irradiated wistar albino rats. A prospective experimental and cross-sectional design was adopted for this study and it included a …
FORMALDEHYDE OBSERVATIONS TOWARDS METHANOL MASER SOURCES ABSTRACT Observational works on 4.83 GHz Formaldehyde (H2CO) absorptions and 4.87 GHz H110α radio recombination lines towards 6.7 GHz Methanol (CH3OH) maser sources are presented. Methanol masers provide ideal sites to probe the earliest stages of massive star formation, while 4.8 GHz Formaldehyde absorptions are accurate probes of physical …
A STUDY OF GEOMAGNETIC STORMS AND ASSOCIATED SOLAR FLARES ABSTRACT Geomagnetic storms are temporal disturbances of the Earth’s magnetosphere caused by a prolonged southward interplanetary magnetic field and usually coinciding with the arrival of coronal mass ejections (CME). Most geomagnetic storms occur under disturbed condition making it intrinsically uneasy to distinguish one geomagnetic storm from …
A STUDY OF FE KA SPECTRAL LINES OF THE MAGNETIC CATACLYSMIC VARIABLES- V1223 SGR ABSTRACT We present the spectral analysis of a cataclysmic variable, V1223 Sgr, from Suzaku satellite archive. The Suzaku satellite observations of V1223 Sgr were made on 13-04-2007 for 42.2 kiloseconds. We resolved the neutral or lown-ionized (6.41keV), He-like (6.70keV), and H-like …