bluuebunny/crossref_metadata_2025_split huggingface dataset:
Mangrove density impacts on tidal dynamic in Segara Anakan Lagoon, Indonesia
Authors: Tarya Ayi , Sunaringati Larasati C , Ningsih Nining Sari 
Published: October 2019

Abstract
The present study aims to understand the tidal dynamics in a tropical coastal lagoon, Segara Anakan, Java, Indonesia. It is a shallow lagoon, with complex tidal channels and connected to the Indian Ocean by two channel outlets. It covers an overall area of about 12.000 ha. Three–quarters of the lagoons area have mangroves and the remaining quarter is covered by water. The Delft3D model has been implemented and validated using observation data. Scenario with uniform and spatially bottom drag coefficient were created in order to investigate the influence of the mangrove density on tidal dynamics. Based on tidal harmonic analysis, the M2 amplitude attenuates from both the western and the eastern lagoon inlets to the interior of the lagoon as the tidal wave is constricted by the narrow lagoon inlet and shallowness of the lagoon. For the case of uniform mangrove density, tidal harmonic analysis reveals M2 amplitude decreasing of 0.5 to 0.25 m from lagoon inlets toward central lagoon due to bottom friction effect. The tidal propagation into lagoon show increasing M2 tidal phase with maximum delay of 2.5 hours at the central lagoon. For the case of spatially mangrove density, the dampening of the tidal wave is stronger of 18% and the phase delay is longer 0.8 hours compare to the case of uniform mangrove density.
Development of Internet of Things (IoT) Technology and Its Applications on Room Cooling System
Authors: Prasetyo Joshua Dwi , Husein  , Budiman Maman 
Published: October 2019

Abstract
This papers propose a physical model that includes the outdoor temperature to determine thermal characteristics of the room by using IoT technology. The physical model is used in the computation in the cloud. The thermal characteristics obtained is used to minimize the energy consumption in room cooling system. The temperature in the room can be also controlled by processing the thermal characteristics in real-time. This papers only show the compatibility of the model with the real experiments data. The physical model is obtained by using thermodynamics and transport phenomena concepts, which are heat capacity and thermal resistance. This model is tested by using 4 real room temperature data set and the thermal characteristics values obtained is analysed with plotting them to outdoor-indoor temperature difference. The physical model is compatible with the real temperature data. The thermal characteristics doesn’t vary much with the outdoor-indoor temperature difference. The thermal characteristics value when the compressor is on is higher.
Driving the Dephasing Assisted Quantum Transport
Authors: Dwiputra Donny , Sulaiman Albertus , Kosasih Jusak S , Hidayat Wahyu , Zen Freddy P 
Published: October 2019

Abstract
Nontrivial quantum effects in biological systems are of high interest among physicists over the past decade. They allow for information and energy to be exchanged with near-unity efficiency despite hindered by the warm, wet, and noisy environment. Several models suggests that the efficient quantum energy transport is due to the interplay between dephasing dynamics and unitary evolution of the disordered biological systems i.e in photosynthetic complex. However, the proposed models have not yet included the driving force depicting the external perturbation used in the experiment such as laser in 2D spectroscopy involved in the detection of the exciton transfer or an artificial quantum transport experiments. Here, we resolve this issue by subjecting the dephasing assisted transport model by Plenio and Huelga [New J. Phys.
10, 11 (2012)] to a driving force. We analyze dynamical evolution of the driven system and show that further efficiency enhancement achieved by driving the transport site. We also discuss some experimental realizations of the quantum transport system.
Effects of construction activities on the planetary boundaries
Authors: Tunji-Olayeni PF , Omuh IO , Afolabi AO , Ojelabi RA , Eshofonie EE 
Published: October 2019

Abstract
This study presents a part of an ongoing research on construction in developing countries and the need to operate within planetary boundaries for sustainable development. It is a desk-research and it uses the already established planetary boundary concept to provide insights on the negative consequences of construction activities on planet earth. Some of the harmful effects of construction activities include: production of re-suspended dust particles and bituminous aerosols during construction, emission of greenhouse gases from embodied energy in buildings, rapid loss of biodiversity, unsustainable disposal of domestic and industrial waste into oceans and other water bodies and the unsustainable use of limited fresh water. The paper concludes that continued unsustainable construction activities will have devastating and irreversible effects on a planetary scale.
Factors affecting quality management practices on building construction sites in Nigeria
Authors: Oni O Z , Amusan L M , Owolabi J D , Akinbile B F 
Published: October 2019

Abstract
This research evaluates the factors affecting quality management practices on building construction sites with a view to improve quality management on building construction sites. To achieve the aim a convenient sampling technique was used to select the construction sites within the study area, The sampling frame comprise the professionals in the built environments such as Architect, Quantity surveyors, Builder and the Engineers working on each site. A total number of 88 questionnaires was administered out of which 63 was returned completed representing 78.75 response rate. The Statistical Package for Social Science (SPSS) software version 21.0 was used to analyze the data. The result of the analysis showed that lack of adequate sanction by the standard assurance organization, non-implementation of National Building Code were among the topmost factors affecting quality management on construction sites in Oyo State. The study concludes that most of the factors affecting effective project quality management in Oyo State were generated by the government, professionals, quality organization agencies construction workers and other stakeholders in construction industry. The study recommends that adequate sanction should be impose on the non-compliance of quality by the standard assurance organization.
Environment Quality in Nigeria: Implications for Poverty Reduction
Authors: Owolabi O.A. , Aderounmu B. , Ogunbiyi T. 
Published: October 2019

Abstract
Poverty in Nigeria is at extremely high levels and represents one of the many economic hardships faced by the Nigeria population. One of the factors potentially contributing to present high poverty levels is poor environment quality which is prevalent in Nigeria and which may result in increased poverty levels as efforts are undertaken to address adverse environment quality. This paper explored the effect of environment quality on poverty reduction in Nigeria using data from the World Bank World Development indicators over the period of 1990 to 2015. The study employed Augmented Dickey Fuller unit root test, and Autoregressive Distributed Lag (ARDL) estimation in analyzing data and the findings of the study revealed that improved environment quality as measured by improved access to sanitation and access to electricity positively and significantly increase poverty level in Nigeria, possibly on account of the increased financial and social costs of gaining access to sanitation and electricity. It is recommended that policy makers ensure that policies aimed at improving environment quality in Nigeria take into account the adverse implications of improving environment quality for poverty so as to ensure that a balance is achieved between improved environment quality and reduced poverty so that a cleaner environment is achieved at lower financial and welfare cost to citizens.
A Secured One Time Password Authentication Technique using (3, 3) Visual Cryptography Scheme
Authors: Oluwakemi Christiana Abikoye , Noah Oluwatobi Akande , Ayomide Victory Garuba , Roseline Oluwaseun Ogundokun 
Published: October 2019

Abstract
The world is vastly becoming a completely digital one with most transactions carried out over the internet. This has exposed the internet to increasing threats and attacks and has necessitated the need for an internet-based authentication and authorization services. One Time Passwords (OTP) have been introduced to overcome the limitations of static passwords. However, research has shown that OTP are not completely free from middle man attacks. This paper presents a (3, 3) Visual Cryptographic Scheme (VCS) technique for OTP security. The technique secures the generated OTP image by dividing it into three shares, of which one of the shares will be sent to the user while the remaining shares will be stored at different locations on the server. Before the original OTP image will be recovered, all the shares must the retrieved and stacked together. To avoid pixel expansion problem and loss of image quality that have characterized existing VCS technique, progressive visual cryptography was adopted to decrypt the retrieved OTP shares. A high quality OTP image was recovered as revealed by the peak signal to noise ratio values and there was no change in size of the OTP images.
Statistical comparison of Schlumberger arrays using randomized complete block design
Authors: Adetola Sanuade Oluseun , Olayide Amosun Joel , David Oyeyemi Kehinde , Sanmi Fagbemigun Tokunbo , Idowu Faloyo Jane 
Published: October 2019

Abstract
In this study, statistical comparison of the resistivity data acquired using vertical electrical sounding (VES) technique with three arrays (conventional Schlumberger array, Hummel array and half-Hummel array) was performed. The objective is to assess the efficacy of the Hummel and half-Hummel arrays of VES as alternative arrays to the conventional Schlumberger array at areas with limited space for acquisition during groundwater exploration activities. A total of fifteen (15) VES data were acquired for the three arrays at five locations within Phase II of Federal University Oye-Ekiti, southwestern, Nigeria. The electrode spacing (AB/2) varies from 1 to 65 m during the acquisition. The raw VES data were subjected to statistical analysis to compare the three arrays. Randomized complete block design (RCBD) was used to establish if one array could be a perfect or near perfect substitution for other arrays. The responses obtained for all the arrays analysed are statistically the same at some locations which means measurements could either be taken using any of the three arrays. However, responses for the three arrays are different at a location which shows the three arrays are independent in this location. Pairwise comparison analysis at this location shows the difference in the three arrays. We therefore generated acceptance and rejection map of the study area which could be used as a guide prior to any geophysical data acquisition.
Groundwater Vulnerability Assessment using Electrical Resistivity Method in the Northern part of Ado-Ekiti, Southwestern Nigeria
Authors: Olaseeni O.G. , Oladapo M.I. , Olayanju G.M. , Dada O.J. , Oyebamiji A.R 
Published: October 2019

Abstract
Over the years, the demand for clean and safe water has skyrocketed globally in response to rising population. Since groundwater is a more reliable source of potable water, assessment of aquifer vulnerability becomes a necessity. This research therefore aimed at delineating geo-electric parameters inform of layer resistivity and thickness, towards generating a second order geo-electric section. This study employed the use of electrical resistivity method to evaluate the vulnerability of aquifers to contamination in the northern part of Ado-Ekiti, southwestern Nigeria. Forty Vertical Electrical Sounding (VES) locations were studied using the Schlumberger array with current electrodes spacing (AB/2) of 150m. ABEM SAS 300 Resistivity Meter was useful for collecting the VES data which were presented as VES curves and quantitatively interpreted through partial curve matching and Computer Assisted 1-D forward modeling using the WinResist software. Geo-electric section along five (5) traverses, iso-resistivity map of the weathered layer and an isopach map showing the depth to aquifer were generated. Seven (7) different types of VES curves were identified, namely A, H, K, KA, HA, QA and KH types. The four geo-electric layers delineated include the topsoil (resistivity values between 29 – 1176 Ωm; thickness from 0.5 – 4.4 m), lateritic layer (resistivity values between 138– 3787 Ωm; thickness between 1.0 – 63.6m), weathered layer (resistivity values between 6 – 298 Ωm; thickness between 0.7 – 17.8 m), and fresh basement (resistivity values between 331 – 7479 Ωm). The total longitudinal unit conductance (S) values obtained range from 0.009 to 2.972 mhos. This suggests that most parts (northern, central, western and eastern portions of the area) have medium to high protective capacity rating; except the eastern portion. Therefore, most parts (80%) of the study area appear to be less vulnerable to contamination.
Geospatial distribution of heavy metal contamination in Ewekoro Limestone, SW Nigeria
Authors: Oyeyemi K. D. , Aizebeokhia A. P. , Anake W. U. , Sanuade O. A. , Akinsiku A.A. , Olofinnade O. M. , Jonathan H.O. , Ayara W. A. 
Published: October 2019

Abstract
Limestone exploration has numerous advantage to the nation’s economy. However, major anthropogenic activities such as mining of such mineral deposits causes environmental contamination due to heavy metals pollution. The presence of heavy metals such as lead, cadmium, mercury and arsenic can interfere with the biochemical pathways by interaction with enzymes and proteins. They equally have the capacity to alter the DNA repair mechanism and act as the inducers of carcinogenesis. The focus of the research is therefore to detect the extent of heavy metals contaminations within the sampled Ewekoro limestone, southwestern Nigeria and to ascertain the risks they posed to the quarry workers, miners and the people residing in the study area.
Assessment of natural radionuclides in a fertilized farmland in Abeokuta, Nigeria: Implications for environmental radioactivity evaluation and monitoring
Authors: Ekhaguere O. A. , Alatise O. O. , Oyeyemi K. D. 
Published: October 2019

Abstract
In this study, the concentrations of radionuclides were determined for soil samples obtained from a fertilized farm soils in Abeokuta, southwestern Nigeria. On the average, seven soil samples were obtained and keptin a sealed polythene bags. Then later dried and pulverized. Two hundred grams of each of the pulverized samples was held in a standard plastic container and left for about thirty days to allow for secular equilibrium between radium and its progenies. Radionuclides activity concentrations within the collected samples were measured using a calibrated NaI-based gamma-ray spectrometer. The detected natural radioactivity of soil samples are presented and radiological attributes for effective radiological hazards detection and monitoringfor the study location are equally estimated. The results revealed that the specific activity for K-40 radionuclides at location L7 is higher than the world average concentration of 420 Bq/kg. This is not unconnected to the fertilizer within that portion of the farm. However, the estimated radiological attributes in the farmland are relatively lower that the threshold standards, which implies that the soils in the farmland are free of any radiation hazards and pose no threat to farmers and the residents of that area. It is however recommended that organic manure should be used in the farmland rather than fertilizer and routine check on environmental radioactivity of the farmland should be done regularly for adequate monitoring.
Toxicity Risks of Selected Heavy Metal on Dwellers from Building Materials Used in Nigeria
Authors: Maxwell Omeje , Adewoyin Olusegun O , Joel Emmanuel S , Onumejor Adaeze C , Akinwumi Akinpelu , Arijaje T E , Usikalu Mojisola R. , Uchechukwu Anne Omeje , Promise Ilo , Adagunodo Theophilus A. 
Published: October 2019

Abstract
Chemical toxicity risks from 14 different brands of building materials such as Cements, tiles, marbles and sands were analysed using Inductively Coupled Plasma Mass Spectrometry (ICP-MS). This study is aimed at determining the risk exposure to dweller of different age groups. The digested samples analysed using ICP-MS for the concentrations of Cr, Pb, Zn, Ni, Fe, As and Cd varies from 10 to 183, 8.96 to 68.70, 35.4 to 733.7, 14.4 to 690.5, 0.95 to 4.64 and 0.7 to 14.7 mgkg−1respectively. Statistical Analysis showed that 44% of the Concentrations of Toxic metals measured in the building material samples come from Ni, the scree plots of dermal and inhalation risks exposure to children aged from 0.5 to 11 years showed sharp drop after Ni metal compared to adult with ages ranges from 12 to 70 years where the drop is steady from the first factor. This indicated that Adults are not over-exposed compared to children to these heavy metals. The High factor value of 2.786 was seen in Goodwill Verified. Tile High factor scores were discovered from the exposure of children to both dermal and inhalation risks compared to the Adults. Some of these concentrations and risks exceed the permissible limits of the European Regulatory Standards and USEPA. Significantly, these chemical toxicity risks of heavy metal contents in the building materials may pose health risks on dwellers especially the under-aged children.
The Background Dose Assessment of Highly Industrialized Area Used for Building and Construction Purposes in Ogun State, Nigeria
Authors: Omeje M. , Adewoyin O.O. , Joel E.S. , Usikalu M.R. , Ayanbisi O.W. , Omeje U.A. , Adagunodo T.A. , Ilo P. , Zaidi E. 
Published: October 2019

Abstract
A highly industrialized and mining zone has been mapped to ensure the level of radiation exposure and environmental safety of the dwellers in the buildings within the vicinity. The highest values of238U and 232Th which are 48 ± 11 and 134 ± 9 BqKg−1 were found to be higher than the world average values of 30 and 40 BqKg−1 according to UNSCEAR. The mean value of radium equivalent (Raeq)activity of200.89±22.54BqKg−1lies within the limit of 370 BqKg−1 recommended by UNSCEAR. The meanabsorbed dose rate of 87.85 nGyh−1 is 4 % higher than the average world value according to UNSCAER 2000.The geospatial analysis revealed that the natural radionuclides in the region have a trend, NW-SE trending with significant re-deposition at the Southern part through diffusion which may be attributed the combinations of soil geology of Dahomey (Benin) Basin and human activities. 3D scatter and ribbon plots validates the strong positive correlation between the level of radioactivity distributions which is in the order of magnitudes 40K>232Th>238U in the study area. Significantly, the geospatial analysis of the background gamma dose rate has revealed the hot spot in the area that could pose high risk of contributing to indoor exposure if constructions are built for dwellers
Interdependency of Soil-gas Radon-222 Concentration on Soil Porosity at different Soil-depths
Authors: Yusuff I.M. , Adagunodo T.A. , Omoloye M.A. , Olanrewaju A.M. 
Published: October 2019

Abstract
Origination of Radon-222 (222Rn) from soil and its concentration, contributing to the highest exposure of ionizing radiation to the public is natural. It is a known radioactive gas and its percentage in concentrations contributing to outdoor radon atmospheric level depends on some physical parameters of the soil. To ascertain some of its dependency on soil porosity, a radiometric survey was carried out on soil depths at varying locations and the laboratory analysis was carried out on the soil sample at each location and depth in order to determine its porosity. The measurements were done using radon detector at five (5) locations. At each location, data were collected at four (4) different soil depths of 20, 40, 60 and 100 cm respectively. In addition, soil samples at these locations and depths were taken to the laboratory for porosity test. The result showed that highest value of 222Rn concentration at 100 cm depth is 24680 ± 1960 Bqm−3 with maximum porosity level of 69.92%, while the lowest concentration at 100 cm depth is 7370 ± 1139 Bqm−3 with minimum porosity level 51.61% respectively. Inferentially, a statistical analysis carried out using Pearson correlation showed that there exist some relationships between soil-gas 222Rn concentrations measured and soil porosity determined at each measurement soil-depths. The nature of the established relationship shows interdependency of 222Rn on soil porosity at different depths, such that if the soil porosity is known, its corresponding soil-gas radon concentration can be determined.
Target Analysis of Antibiotic Drugs in Poultry Feedstuff by Solid Phase Extraction and Ultra-High Performance Liquid Chromatography-Tandem Mass Spectrometry
Authors: Abdulrasaq O. Oyedeji , Benson Nsikak U. , Williams Akan B. , Msagati Titus A. M. 
Published: October 2019

Abstract
Seventy-five poultry feed samples of two feed types were analysed for antibiotic drugs using a simple generic solid phase extraction procedure with dichloromethane-acetonitrile after delipidation with n-hexane. Analytical separation was performed on a Waters Acquity C18 column with gradient elution consisting of water and acetonitrile. Liquid chromatography–tandem mass spectrometry (LC-MS/MS), with positive and negative electrospray ionization methods in the multiple reaction monitoring modes (MRM), was used for the quantification of 21 compounds from six classes including fluoroquinolones, sulfonamides, lincosamides, anthelmintics, macrolides and the β-lactams in a single chromatographic run of 14 minutes. All the six classes of the drugs were found in the two feed types at concentration ranging between 0.22 – 1505 ng/g. Sulfadimethoxine, sulfaguanidine, sulfamerazine, and sulfamethoxazole were the major sulfonamides in the two feed types with concentration at the part per million levels. Albendazole, penicillin-G, sulfadiazine, sulfaquinoxaline and sulfixosazole were not detected in the layers mash exclusively fed to laying birds; also, sulfamethazine and sulfamozole were the only two drugs not detected in the growers mash meant for birds raised for meat. Ciprofloxacin, sulfadimethoxine, sulfamethoxazole, sulfamerazine, and sulfaguanidine were the most prominent antibiotic drugs in the two feed types. Results from the present study suggest that feed millers surreptitiously fortify their feeds with antibiotics without declaring same, thus exposing poultry chickens to sub-therapeutic dosages of the drugs. It is evident that self-regulation for safety in the poultry industry should be discouraged thus relevant authorities must take steps to reduce and control the use of antibiotics to protect public health.