A geophysical survey aimed at determining the Poisson’s ratio of subsurface earth materials have
been carried out. Knowledge of the Poisson’s ratio of materials is important since it gives information about the
quality of such materials with respect to construction works. The study area is Ozizza (lat. 5.80
-5.90N; long.
7.80
-7.90E) situated within the Afikpo sedimentary basin in south - eastern Nigeria. The geophysical method
employed was the seismic refraction method and both P - and S - waves were utilized. The major equipment
used was a MOD.S79 seismograph and its accessories including P- and S- wave sources and detectors. The
result shows that the P- waves delineated three layers with average velocities of 420m/s, 1745m/s and 2620m/s
for the first, second and third layers from the earth’s surface respectively whereas the S-waves revealed only
two layers with average velocities of 310 m/s and 1100 m/s for the first and second layers accordingly. The
result indicates that the first and second layers of Ozizza (probably made up of sandy clay and sand with gravel
have Poisson’s ratio of 0.22 and 0.28 respectively.
This study aims at investigating possible connections between point load index
(Is50) and the uniaxial compressive strength (UCS) for a Basaltic rock derived from
different regions in Jordan and examining potential relationships between Basalt
physical properties and ultrasonic pulse value (UPV). A series of lab experiments
including point load test, uniaxial compressive strength, Brazilian split test, ultrasonic
pulse velocity, dry density, and porosity were performed on a Basaltic rock cores with
dimension as per the ISRM standard. The obtained results indicated that the
relationship between unconfined compressive strength and point load test of Basalt is
restricted with the result of the previous studies and ranged between 20 to 24 times the
point load index values. Results also revealed that a good relationship may be derived
between Brazilian split test and unconfined compressive strength. Lastly, results
indicate a good relationship between ultrasonic pulse values (UPV) attained with both
porosity and dry density.
The effect of disturbance factor on the stability of tunnels (Case study: Tun...IJRES Journal
Disturbance factor (D) is related to excavation method and cause damage and stress relief in the rock masses. The convergence and plastic zone around tunnels depends on the disturbance factor of rocks.This study has been in the tunnel No.2 of Kurdistan in NW of Iran which is composed of shale rocks. In tunnel modeling, different disturbance factors(0 to 1) areanalyzed using phase2 software and the amount of displacement and extent of plastic zone in around the tunnelis determined. The obtain results show that by increasing of disturbance factor, the displacement and plastic zone around the tunnel has increased and the most increase has occurred in disturbance factors 0.8 to 1. Therefore, for excavation of this tunnel, the blasting method should not be used and instead of it, the mechanical methods must be used.
This study aims at investigating possible connections between point load index
(Is50) and the uniaxial compressive strength (UCS) for a Basaltic rock derived from
different regions in Jordan and examining potential relationships between Basalt
physical properties and ultrasonic pulse value (UPV). A series of lab experiments
including point load test, uniaxial compressive strength, Brazilian split test, ultrasonic
pulse velocity, dry density, and porosity were performed on a Basaltic rock cores with
dimension as per the ISRM standard. The obtained results indicated that the
relationship between unconfined compressive strength and point load test of Basalt is
restricted with the result of the previous studies and ranged between 20 to 24 times the
point load index values. Results also revealed that a good relationship may be derived
between Brazilian split test and unconfined compressive strength. Lastly, results
indicate a good relationship between ultrasonic pulse values (UPV) attained with both
porosity and dry density.
The effect of disturbance factor on the stability of tunnels (Case study: Tun...IJRES Journal
Disturbance factor (D) is related to excavation method and cause damage and stress relief in the rock masses. The convergence and plastic zone around tunnels depends on the disturbance factor of rocks.This study has been in the tunnel No.2 of Kurdistan in NW of Iran which is composed of shale rocks. In tunnel modeling, different disturbance factors(0 to 1) areanalyzed using phase2 software and the amount of displacement and extent of plastic zone in around the tunnelis determined. The obtain results show that by increasing of disturbance factor, the displacement and plastic zone around the tunnel has increased and the most increase has occurred in disturbance factors 0.8 to 1. Therefore, for excavation of this tunnel, the blasting method should not be used and instead of it, the mechanical methods must be used.
Determination of Thickness of Aquifer with Vertical Electrical Sounding iosrjce
IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of mechanical and civil engineering and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications in mechanical and civil engineering. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
Measurement of Velocity Gradients of Beds At Unwana, Nigeriaiosrjce
IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of mechanical and civil engineering and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications in mechanical and civil engineering. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
[GEOLOGI TEKNIK BATUAN] Pengukuran Bidang Discontinuity di LapanganRoishe Prabowo
Mekanisme dan cara memperoleh data bidang discontinuitas di lapangan. Bidang discontinuitas adalah cara mengetahui potensi kerentanan dan bahaya pada suatu tebing atau lereng area penelitian.
Sedimentology and Paleoenvironment of Deposition of the Deba-Fulani Member of...AZOJETE UNIMAID
The sedimentology and paleoenvironment of the Deba-Fulani Member of the Pindiga Formation were investigated on the basis of their grain size distribution. Granulometric analysis has indicated that the samples are generally well to moderately sorted with skewness values ranging from negatively to positively skewed which may indicate influence of both marine and fluvial conditions. Bivariate plot relationships of standard deviation vs. mean, standard deviation vs. skewness, first percentile vs. mean also indicated both fluvial and marine setting for the middle part of the Pindiga Formation member. However, most of the bivariate plot showed dominance of fluvial environment. The probability curve plot shows a prevalence of three-sand population curves which are usually associated with wave processes indicating marine conditions for most part of the Deba-Fulani Member.
It covers seismic method, gravity method, electromagnetic method, magnetic method and radiometric method. all these methods help in mineral exploration
M6.0 2004 Parkfield Earthquake : Seismic AttenuationAli Osman Öncel
HRSN isimli kuyu içi sismik istasyonlar kullanılarak, San Andreas fayı boyunca meydana gelen büyük depremler öncesi sismik azalımın varlığının olup olmadığı araştırılıyor.
Resistivity Imaging of Shallow Sediments within University of Maiduguri Campu...iosrjce
Electrical resistivity imaging within University of Maiduguri campus shows varying resistivity values
and thicknesses for shallow sediments from one profile line to another. Sequence stratigraphy of the sediments
indicates they were deposited at different times and varying conditions. Structure of the medium of deposition
conditioned the lithological structures of the sediments. Basin or bowl-shapes of some resistivity structures are
characteristics of some gravelly and clayey sediments. In most cases where such structures are encountered,
gravels seem to host sands; while clays are located at the central parts. This situation may suggest that the
sediments were deposited at the same time, where heavier ones settled to the bottom of the stratigraphy.
Sometimes clayey sediments host sandy sediments; a situation that may be associated with different times of
deposition. Some sediments were laid horizontally, some inclined and others nosed into overlying ones.
Majority of the resistivity images indicate clayey sediments occupying the basal resistivity units. Lower
resistivity values associated with some clayey sediment suggest high degree of saturation. The water might have
been derived through infiltration of the overlying porous sediments. The clays may be followed upwardly by
sands, while gravels sometimes form the capping sediments. Few resistivity profiles host the three sediments at
the bottom of the resistivity structures. Stratigraphic thicknesses for the sediments vary both laterally and
vertically. These are associated with the structure of the medium and prevailing conditions at the time of
deposition
Gravity and magnetic methods are an essential part of oil exploration. They do not replace seismic. Rather, they add to it. Despite being comparatively low-resolution, they have some very big advantages.
These geophysical methods passively measure natural variations in the earth’s gravity and magnetic fields over a map area and then try to relate these variations to geologic features in the subsurface. Lacking a controlled source, such surveys are usually environmentally unobjectionable.
Determination of Thickness of Aquifer with Vertical Electrical Sounding iosrjce
IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of mechanical and civil engineering and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications in mechanical and civil engineering. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
Measurement of Velocity Gradients of Beds At Unwana, Nigeriaiosrjce
IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of mechanical and civil engineering and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications in mechanical and civil engineering. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
[GEOLOGI TEKNIK BATUAN] Pengukuran Bidang Discontinuity di LapanganRoishe Prabowo
Mekanisme dan cara memperoleh data bidang discontinuitas di lapangan. Bidang discontinuitas adalah cara mengetahui potensi kerentanan dan bahaya pada suatu tebing atau lereng area penelitian.
Sedimentology and Paleoenvironment of Deposition of the Deba-Fulani Member of...AZOJETE UNIMAID
The sedimentology and paleoenvironment of the Deba-Fulani Member of the Pindiga Formation were investigated on the basis of their grain size distribution. Granulometric analysis has indicated that the samples are generally well to moderately sorted with skewness values ranging from negatively to positively skewed which may indicate influence of both marine and fluvial conditions. Bivariate plot relationships of standard deviation vs. mean, standard deviation vs. skewness, first percentile vs. mean also indicated both fluvial and marine setting for the middle part of the Pindiga Formation member. However, most of the bivariate plot showed dominance of fluvial environment. The probability curve plot shows a prevalence of three-sand population curves which are usually associated with wave processes indicating marine conditions for most part of the Deba-Fulani Member.
It covers seismic method, gravity method, electromagnetic method, magnetic method and radiometric method. all these methods help in mineral exploration
M6.0 2004 Parkfield Earthquake : Seismic AttenuationAli Osman Öncel
HRSN isimli kuyu içi sismik istasyonlar kullanılarak, San Andreas fayı boyunca meydana gelen büyük depremler öncesi sismik azalımın varlığının olup olmadığı araştırılıyor.
Resistivity Imaging of Shallow Sediments within University of Maiduguri Campu...iosrjce
Electrical resistivity imaging within University of Maiduguri campus shows varying resistivity values
and thicknesses for shallow sediments from one profile line to another. Sequence stratigraphy of the sediments
indicates they were deposited at different times and varying conditions. Structure of the medium of deposition
conditioned the lithological structures of the sediments. Basin or bowl-shapes of some resistivity structures are
characteristics of some gravelly and clayey sediments. In most cases where such structures are encountered,
gravels seem to host sands; while clays are located at the central parts. This situation may suggest that the
sediments were deposited at the same time, where heavier ones settled to the bottom of the stratigraphy.
Sometimes clayey sediments host sandy sediments; a situation that may be associated with different times of
deposition. Some sediments were laid horizontally, some inclined and others nosed into overlying ones.
Majority of the resistivity images indicate clayey sediments occupying the basal resistivity units. Lower
resistivity values associated with some clayey sediment suggest high degree of saturation. The water might have
been derived through infiltration of the overlying porous sediments. The clays may be followed upwardly by
sands, while gravels sometimes form the capping sediments. Few resistivity profiles host the three sediments at
the bottom of the resistivity structures. Stratigraphic thicknesses for the sediments vary both laterally and
vertically. These are associated with the structure of the medium and prevailing conditions at the time of
deposition
Gravity and magnetic methods are an essential part of oil exploration. They do not replace seismic. Rather, they add to it. Despite being comparatively low-resolution, they have some very big advantages.
These geophysical methods passively measure natural variations in the earth’s gravity and magnetic fields over a map area and then try to relate these variations to geologic features in the subsurface. Lacking a controlled source, such surveys are usually environmentally unobjectionable.
13 січня відбулося засідання школи молодого вчителя наorestznak
13 січня відбулося засідання школи молодого вчителя на тему "Золота педагогічна скарбниця "101 педагогічна ідея. Як зробити урок", на якому виступили:
Романиш В.М. (вч. польської мови) "Використання різних методичних прийомів на різних етапах уроку.Конструктор уроку за Анатолієм Гіном",
Возняк О.Я. (вч. інформатики) "Методичні прийоми які впливають на формування мотивації",
Іванішин Г.М. (вч. початкових класів, хореограф) "Як знайти золоту середину? Вчительські ролі".
analysis of flow resistance in open channel for proper flow predictionINFOGAIN PUBLICATION
In an open channel flow, the Manning’s n depends on the bed material of the channel, the slope of the channel and the rate of discharge in the channel. Experiments are done with two bed materials, the original bed surface of the channel and with grass carper. The roughness coefficient is determined in various cases. The variations in roughness coefficient is tested with respect to flow parameters such as discharge, depth and bed slope. The effect of variations the flow parameters on different bed roughness is also analyzed by taking into account the original flume surface and grass carpet surface.
International Journal of Mathematics and Statistics Invention (IJMSI) is an international journal intended for professionals and researchers in all fields of computer science and electronics. IJMSI publishes research articles and reviews within the whole field Mathematics and Statistics, new teaching methods, assessment, validation and the impact of new technologies and it will continue to provide information on the latest trends and developments in this ever-expanding subject. The publications of papers are selected through double peer reviewed to ensure originality, relevance, and readability. The articles published in our journal can be accessed online.
The International Journal of Engineering & Science is aimed at providing a platform for researchers, engineers, scientists, or educators to publish their original research results, to exchange new ideas, to disseminate information in innovative designs, engineering experiences and technological skills. It is also the Journal's objective to promote engineering and technology education. All papers submitted to the Journal will be blind peer-reviewed. Only original articles will be published.
The papers for publication in The International Journal of Engineering& Science are selected through rigorous peer reviews to ensure originality, timeliness, relevance, and readability.
The objective of this research is to identify reservoir rocks of Wichian Buri Sub-basin by using
acoustic impedance and porosity relationship. The study area is mainly confined to Wichian Buri Sub-basin,
Wichian Buri district, Phetchabun province, Thailand. The main research activities are : (1) the acoustic
impedance data of compressional sonic logs from selected wells computing, and (2) qualitative data analysis by
cross-plotting among acoustic impedance, porosity and depth for recognition of lithological units to identify
reservoir rock.
The result of qualitative analysis showed that relationship between acoustic impedance and depth,
relationship between porosity and depth, relationship between acoustic impedance of short spacing delta-time
and depth and lithological description can be explained petroleum system of Wichian buri sub-basin as Unit
Three tends to be source and reservoir rock whilst Unit Four tends to be source rock.
An Examination of Effectuation Dimension as Financing Practice of Small and M...iosrjce
IOSR Journal of Business and Management (IOSR-JBM) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of business and managemant and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications inbusiness and management. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
Does Goods and Services Tax (GST) Leads to Indian Economic Development?iosrjce
IOSR Journal of Business and Management (IOSR-JBM) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of business and managemant and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications inbusiness and management. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
Childhood Factors that influence success in later lifeiosrjce
IOSR Journal of Business and Management (IOSR-JBM) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of business and managemant and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications inbusiness and management. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
Emotional Intelligence and Work Performance Relationship: A Study on Sales Pe...iosrjce
IOSR Journal of Business and Management (IOSR-JBM) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of business and managemant and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications inbusiness and management. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
Customer’s Acceptance of Internet Banking in Dubaiiosrjce
IOSR Journal of Business and Management (IOSR-JBM) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of business and managemant and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications inbusiness and management. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
A Study of Employee Satisfaction relating to Job Security & Working Hours amo...iosrjce
IOSR Journal of Business and Management (IOSR-JBM) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of business and managemant and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications inbusiness and management. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
Consumer Perspectives on Brand Preference: A Choice Based Model Approachiosrjce
IOSR Journal of Business and Management (IOSR-JBM) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of business and managemant and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications inbusiness and management. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
Student`S Approach towards Social Network Sitesiosrjce
IOSR Journal of Business and Management (IOSR-JBM) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of business and managemant and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications inbusiness and management. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
Broadcast Management in Nigeria: The systems approach as an imperativeiosrjce
IOSR Journal of Business and Management (IOSR-JBM) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of business and managemant and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications inbusiness and management. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
A Study on Retailer’s Perception on Soya Products with Special Reference to T...iosrjce
IOSR Journal of Business and Management (IOSR-JBM) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of business and managemant and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications inbusiness and management. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
A Study Factors Influence on Organisation Citizenship Behaviour in Corporate ...iosrjce
IOSR Journal of Business and Management (IOSR-JBM) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of business and managemant and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications inbusiness and management. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
Consumers’ Behaviour on Sony Xperia: A Case Study on Bangladeshiosrjce
IOSR Journal of Business and Management (IOSR-JBM) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of business and managemant and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications inbusiness and management. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
Design of a Balanced Scorecard on Nonprofit Organizations (Study on Yayasan P...iosrjce
IOSR Journal of Business and Management (IOSR-JBM) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of business and managemant and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications inbusiness and management. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
Public Sector Reforms and Outsourcing Services in Nigeria: An Empirical Evalu...iosrjce
IOSR Journal of Business and Management (IOSR-JBM) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of business and managemant and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications inbusiness and management. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
Media Innovations and its Impact on Brand awareness & Considerationiosrjce
IOSR Journal of Business and Management (IOSR-JBM) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of business and managemant and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications inbusiness and management. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
Customer experience in supermarkets and hypermarkets – A comparative studyiosrjce
IOSR Journal of Business and Management (IOSR-JBM) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of business and managemant and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications inbusiness and management. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
Social Media and Small Businesses: A Combinational Strategic Approach under t...iosrjce
IOSR Journal of Business and Management (IOSR-JBM) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of business and managemant and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications inbusiness and management. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
Secretarial Performance and the Gender Question (A Study of Selected Tertiary...iosrjce
IOSR Journal of Business and Management (IOSR-JBM) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of business and managemant and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications inbusiness and management. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
Implementation of Quality Management principles at Zimbabwe Open University (...iosrjce
IOSR Journal of Business and Management (IOSR-JBM) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of business and managemant and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications inbusiness and management. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
Organizational Conflicts Management In Selected Organizaions In Lagos State, ...iosrjce
IOSR Journal of Business and Management (IOSR-JBM) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of business and managemant and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications inbusiness and management. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
Professional air quality monitoring systems provide immediate, on-site data for analysis, compliance, and decision-making.
Monitor common gases, weather parameters, particulates.
Earliest Galaxies in the JADES Origins Field: Luminosity Function and Cosmic ...Sérgio Sacani
We characterize the earliest galaxy population in the JADES Origins Field (JOF), the deepest
imaging field observed with JWST. We make use of the ancillary Hubble optical images (5 filters
spanning 0.4−0.9µm) and novel JWST images with 14 filters spanning 0.8−5µm, including 7 mediumband filters, and reaching total exposure times of up to 46 hours per filter. We combine all our data
at > 2.3µm to construct an ultradeep image, reaching as deep as ≈ 31.4 AB mag in the stack and
30.3-31.0 AB mag (5σ, r = 0.1” circular aperture) in individual filters. We measure photometric
redshifts and use robust selection criteria to identify a sample of eight galaxy candidates at redshifts
z = 11.5 − 15. These objects show compact half-light radii of R1/2 ∼ 50 − 200pc, stellar masses of
M⋆ ∼ 107−108M⊙, and star-formation rates of SFR ∼ 0.1−1 M⊙ yr−1
. Our search finds no candidates
at 15 < z < 20, placing upper limits at these redshifts. We develop a forward modeling approach to
infer the properties of the evolving luminosity function without binning in redshift or luminosity that
marginalizes over the photometric redshift uncertainty of our candidate galaxies and incorporates the
impact of non-detections. We find a z = 12 luminosity function in good agreement with prior results,
and that the luminosity function normalization and UV luminosity density decline by a factor of ∼ 2.5
from z = 12 to z = 14. We discuss the possible implications of our results in the context of theoretical
models for evolution of the dark matter halo mass function.
This presentation explores a brief idea about the structural and functional attributes of nucleotides, the structure and function of genetic materials along with the impact of UV rays and pH upon them.
Deep Behavioral Phenotyping in Systems Neuroscience for Functional Atlasing a...Ana Luísa Pinho
Functional Magnetic Resonance Imaging (fMRI) provides means to characterize brain activations in response to behavior. However, cognitive neuroscience has been limited to group-level effects referring to the performance of specific tasks. To obtain the functional profile of elementary cognitive mechanisms, the combination of brain responses to many tasks is required. Yet, to date, both structural atlases and parcellation-based activations do not fully account for cognitive function and still present several limitations. Further, they do not adapt overall to individual characteristics. In this talk, I will give an account of deep-behavioral phenotyping strategies, namely data-driven methods in large task-fMRI datasets, to optimize functional brain-data collection and improve inference of effects-of-interest related to mental processes. Key to this approach is the employment of fast multi-functional paradigms rich on features that can be well parametrized and, consequently, facilitate the creation of psycho-physiological constructs to be modelled with imaging data. Particular emphasis will be given to music stimuli when studying high-order cognitive mechanisms, due to their ecological nature and quality to enable complex behavior compounded by discrete entities. I will also discuss how deep-behavioral phenotyping and individualized models applied to neuroimaging data can better account for the subject-specific organization of domain-general cognitive systems in the human brain. Finally, the accumulation of functional brain signatures brings the possibility to clarify relationships among tasks and create a univocal link between brain systems and mental functions through: (1) the development of ontologies proposing an organization of cognitive processes; and (2) brain-network taxonomies describing functional specialization. To this end, tools to improve commensurability in cognitive science are necessary, such as public repositories, ontology-based platforms and automated meta-analysis tools. I will thus discuss some brain-atlasing resources currently under development, and their applicability in cognitive as well as clinical neuroscience.
Richard's entangled aventures in wonderlandRichard Gill
Since the loophole-free Bell experiments of 2020 and the Nobel prizes in physics of 2022, critics of Bell's work have retreated to the fortress of super-determinism. Now, super-determinism is a derogatory word - it just means "determinism". Palmer, Hance and Hossenfelder argue that quantum mechanics and determinism are not incompatible, using a sophisticated mathematical construction based on a subtle thinning of allowed states and measurements in quantum mechanics, such that what is left appears to make Bell's argument fail, without altering the empirical predictions of quantum mechanics. I think however that it is a smoke screen, and the slogan "lost in math" comes to my mind. I will discuss some other recent disproofs of Bell's theorem using the language of causality based on causal graphs. Causal thinking is also central to law and justice. I will mention surprising connections to my work on serial killer nurse cases, in particular the Dutch case of Lucia de Berk and the current UK case of Lucy Letby.
Slide 1: Title Slide
Extrachromosomal Inheritance
Slide 2: Introduction to Extrachromosomal Inheritance
Definition: Extrachromosomal inheritance refers to the transmission of genetic material that is not found within the nucleus.
Key Components: Involves genes located in mitochondria, chloroplasts, and plasmids.
Slide 3: Mitochondrial Inheritance
Mitochondria: Organelles responsible for energy production.
Mitochondrial DNA (mtDNA): Circular DNA molecule found in mitochondria.
Inheritance Pattern: Maternally inherited, meaning it is passed from mothers to all their offspring.
Diseases: Examples include Leber’s hereditary optic neuropathy (LHON) and mitochondrial myopathy.
Slide 4: Chloroplast Inheritance
Chloroplasts: Organelles responsible for photosynthesis in plants.
Chloroplast DNA (cpDNA): Circular DNA molecule found in chloroplasts.
Inheritance Pattern: Often maternally inherited in most plants, but can vary in some species.
Examples: Variegation in plants, where leaf color patterns are determined by chloroplast DNA.
Slide 5: Plasmid Inheritance
Plasmids: Small, circular DNA molecules found in bacteria and some eukaryotes.
Features: Can carry antibiotic resistance genes and can be transferred between cells through processes like conjugation.
Significance: Important in biotechnology for gene cloning and genetic engineering.
Slide 6: Mechanisms of Extrachromosomal Inheritance
Non-Mendelian Patterns: Do not follow Mendel’s laws of inheritance.
Cytoplasmic Segregation: During cell division, organelles like mitochondria and chloroplasts are randomly distributed to daughter cells.
Heteroplasmy: Presence of more than one type of organellar genome within a cell, leading to variation in expression.
Slide 7: Examples of Extrachromosomal Inheritance
Four O’clock Plant (Mirabilis jalapa): Shows variegated leaves due to different cpDNA in leaf cells.
Petite Mutants in Yeast: Result from mutations in mitochondrial DNA affecting respiration.
Slide 8: Importance of Extrachromosomal Inheritance
Evolution: Provides insight into the evolution of eukaryotic cells.
Medicine: Understanding mitochondrial inheritance helps in diagnosing and treating mitochondrial diseases.
Agriculture: Chloroplast inheritance can be used in plant breeding and genetic modification.
Slide 9: Recent Research and Advances
Gene Editing: Techniques like CRISPR-Cas9 are being used to edit mitochondrial and chloroplast DNA.
Therapies: Development of mitochondrial replacement therapy (MRT) for preventing mitochondrial diseases.
Slide 10: Conclusion
Summary: Extrachromosomal inheritance involves the transmission of genetic material outside the nucleus and plays a crucial role in genetics, medicine, and biotechnology.
Future Directions: Continued research and technological advancements hold promise for new treatments and applications.
Slide 11: Questions and Discussion
Invite Audience: Open the floor for any questions or further discussion on the topic.
insect taxonomy importance systematics and classification
Estimation of Poisson’s Ratio of Ozizza Subsurface Layers
1. IOSR Journal of Applied Geology and Geophysics (IOSR-JAGG)
e-ISSN: 2321–0990, p-ISSN: 2321–0982.Volume 3, Issue 5 Ver. I (Sep. - Oct. 2015),PP 68-70
www.iosrjournals.org
DOI: 10.9790/0990-03516870 www.iosrjournals.org 68 | Page
Estimation of Poisson’s Ratio of Ozizza Subsurface Layers
S.O. Agha1
, C. Agha2
, P.A. Nwofe1
, A.E. Umahi1
, J.N. Ekpe1
, S.P.I. Ogah3
1
Department of Industrial Physics, Ebonyi State University, P.M.B 53, Abakaliki, Nigeria
2
Department of Science Education, Ebonyi State University, P.M.B 53, Abakaliki, Nigeria
3
Department of Industrial Chemistry, Ebonyi State University, P.M.B 53, Abakaliki, Nigeria
Abstract : A geophysical survey aimed at determining the Poisson’s ratio of subsurface earth materials have
been carried out. Knowledge of the Poisson’s ratio of materials is important since it gives information about the
quality of such materials with respect to construction works. The study area is Ozizza (lat. 5.80
-5.90
N; long.
7.80
-7.90
E) situated within the Afikpo sedimentary basin in south - eastern Nigeria. The geophysical method
employed was the seismic refraction method and both P - and S - waves were utilized. The major equipment
used was a MOD.S79 seismograph and its accessories including P- and S- wave sources and detectors. The
result shows that the P- waves delineated three layers with average velocities of 420m/s, 1745m/s and 2620m/s
for the first, second and third layers from the earth’s surface respectively whereas the S-waves revealed only
two layers with average velocities of 310 m/s and 1100 m/s for the first and second layers accordingly. The
result indicates that the first and second layers of Ozizza (probably made up of sandy clay and sand with gravel
have Poisson’s ratio of 0.22 and 0.28 respectively.
Keywords – Basin, Poisson, Sedimentary, Seismograph
I. Introduction
When a force is applied to a material, it deforms. This implies that particles of the materials are
displaced from their original positions [1-2]. As long as the applied force is not greater than a certain threshold
value the particle displacement can be reversed. The reversal takes place when the applied force is removed so
that no permanent change (size or shape) occurs. Materials which exhibit this behavior are said to be elastic.
Materials in the earth’s interior also exhibit elastic behavior. The stresses subsurface materials undergo due to
the passage of seismic waves or otherwise cause corresponding strains of the materials. Whereas, stress, is
defined as the ratio of the applied force to the cross- sectional area of a material, strain, is the ratio of
extension to original length. There are various kinds of stresses (e.g. tensile/compressive, bulk, shear/tangential,
etc) which produce corresponding kinds of strains. Tensile/compressive stress produces longitudinal strain. In
two dimensions, this longitudinal strain involves an extension in one direction, say x (the direction of
application of force) and contraction in the other direction, say y (see Fig. 1).
Fig. 1. Shape deformation of a rectangular bar due to the action of a tensile force.
2. Estimation of Poisson’s Ratio of Ozizza Subsurface Layers
DOI: 10.9790/0990-03516870 www.iosrjournals.org 69 | Page
We define the Poisson’s ratio, Ѵ of a material acted upon by a force Fx as the ratio of longitudinal
extension to lateral contraction. From Fig. 1, Ѵ is given by;
sXX
sYY
x
x
y
y
V
(1)
However, it should be noted that the description of longitudinal strain can also be expanded to three
dimensions. Poisson’s ratio, Ѵ is one of the elastic constants of materials. It is related to other elastic constants
such as Bulk modulus, K, shear modulus, µ and Young’s modulus, E by the following:
V
E
K
213
(2)
V
E
12
(3)
If there is no volume change where a unidirectional stress is applied, Ѵ becomes 0.5; the maximum
value it can have. For highly consolidated, unweathered rocks, Ѵ ranges from 0.2 to 0.3, while for most non-
indurated elastic sedimentary rocks, it ranges from 0.05 to 0.02, depending on degree of porosity and weathering
[2-5]. Estimate of the Poisson’s ratio values of an area is very useful as it furnishes the engineer with knowledge
of the quality of the subsurface materials with respect to building construction and other related works requiring
foundation making. The Poisson’s ratio’s of subsurface materials at Ozizza (latitude 5.80
-5.90
N; longitude 7.80
-
7.90
E) were estimated using seismic compressional waves generated from a mechanical source. Ozizza has an
area of about 25km2
and is located at the western part of Afikpo basin - a sedimentary basin in southeastern
Nigeria. Some geophysical works have been carried out within the basin. Research has been done by Okeke et al
[6] on gravity survey along Afikpo –Amasiri axis. Their result gave an overall estimated average thickness of
the pre-santonian sediments as 5.9km. In the literature, Selemo [7], carried out a research work on the
aeromagnetic study of the basement relief of Afikpo basin. His objective was to study critically the basement
relief with a view of understanding properly the intra-basement and supra-basement anomalies that may be
responsible for the geological structures in the area. In this study, the Poisson ratio of Ozizza subsurface layers
is reported for the first time.
II. Materials And Method
The equipment used in the work comprises an MOD S79 seismograph and its accessories including
compressional (P) wave and shear(S) wave geophones as sensors; a hammer and a metal plate as wave source.
The method employed was the seismic refraction method. Single line profiling was adopted and the traverse
length for each profile line was 60 m. Compressional waves and shear waves were generated and utilized. Both
P-and S- waves were propagated along the same profile line in the study area. The seismic data obtained were
the travel times, T(ms) of the refracted signals (P and S) and the shot-detector distance, X(m).The arrival times
were plotted against offsets and seismic velocities of underlying layers were determined from the T-X curves.
III. Results And Discussion
Sample T-X curves obtained at the study area are shown in Figs. 2 and 3. In each of the
locations in the study area, the P-waves clearly defined a 3-layer case (Fig. 2). The mean seismic velocities of
the layers were 420 m/s, 745 m/s and 1720 m/s which probably indicate sandy clay, sand with gravel and a
saturated layer respectively. The average thicknesses of the first and second layers were 2.7m and 2.5m
respectively.
On the other hand, the S-wave showed a 2-layer case (Fig. 3) with velocities of 510m/s and 1400m/s
for the first and second layers respectively. The Poisson’s ratios for the first two layers from the surface were
estimated as 0.22 and 0.28 respectively.
3. Estimation of Poisson’s Ratio of Ozizza Subsurface Layers
DOI: 10.9790/0990-03516870 www.iosrjournals.org 70 | Page
Fig. 2: Typical P-wave T-X curve obtained at the study area
Fig. 3: Typical S-wave T-X curve obtained at study area.
IV. Conclusion
For highly consolidated unweathered rocks, the Poisson’s ratio Ѵ ranges from 0.2 to 0.3 [1, 4]. The
estimated values of Poisson’s ratio for the first and second layers of Ozizza are 0.22 and 0.28.These layers
which have average thicknesses of 2.7m and 2.5m (top and bottom) and which were interpreted to be probably
sandy layer and sand with gravel respectively are likely be consolidated and unweathered.
References
[1] M.B. Dobrin, Introduction to geophysical prospecting (McGraw-Hill Books ltd., Japan, 1976).
[2] W. Lowrie, (Fundamentals of Geopysics Cambridge university press, UK, 1997).
[3] Telford, W.M., Geldart L.P., sheriff, R.E. keys, D.A. (Applied Geophysics, Cambridge university press,. New York, 1976).
[4] Grant E.S., west G .F. Interpretation theory in Applied Geophysics, (McGraw-Hill Book, company, New York, 1965).
[5] F.P. Haeni, Application of seismic refraction method in Groundwater modeling studies in New England, Geophysics 51(2), 1986,
236-249.
[6] F. N., Okeke, C. A., Onwumechili, B. A. Rabiu, Day-to-day variability of geomagnetic hourly amplitudes at low latitudes.
Geophysical Journal International, 134(2), 1998, 484-500.
[7] Selemo. D. (1999): Aeromagnetic study of the basement relief in Afikpo basin, Nigeria, Unpublised Ph.D Thesis, University of
Calabar, Nigeria.