bluuebunny/crossref_metadata_2025_split huggingface dataset:
Changing Stages of System Innovation at The Ombilin’s Coal Mines of Sawahlunto: From Ghost Town To World Heritage
Authors: Erman Erwiza 
Published: February 2021

<p>This paper is about system innovation, a transition from one socio-technical system to another by transforming the historical and cultural area into a world heritage city. The objective of this study is to reconstruct the changing stages of system innovation in achieving the status World heritage at the Ombilin coal mines site of Sawahlunto. The stages of transforming the historical and cultural area into a world heritage for tourism space involved multi-dimensional changes, namely: i. transformation of government sector, ii. economic development trajectory, iii. social-political transformation of society. The success key factors for Ombilin as World Heritage city are: <em>first,</em> the key to the success cannot be separated from the leadership, <em>second</em>, the heritage asset factor that articulated by leadership success in integrating various interests of actors to revitalize heritage assets. This study of system innovation will contribute to: I enrich the understanding on system innovation from historical perspective, and: ii. new approach in social history through study of achieving the status as a city of World Heritage.</p><p> </p><p>Key words: <em>system innovation, World heritage, coal mining, historical reconstruction, transformation.<strong></strong></em></p>
Cost-effectiveness analysis of active psoriatic arthritis treatment with ixekizumab in adult patients in Russian Federation health care system
Authors: Pyadushkina E. A. , Derkach E. V. , Frolov M. Yu. , Rogov V. A. , Salasyuk A. S. 
Published: February 2021

Objective: to evaluate the economic impact of the use of various biologic disease-modifying antirheumatic drugs (bDMARDs) from the group of inhibitors of interleukins (iIL) 12/23 and iIL17 in adult patients with psoriatic arthritis (PsA) with insufficient response to therapy with TNFα inhibitors (TNFα inhibitors).Patients and methods. A Microsoft Excel model has been developed, it allows to calculate the average cost of treatment of 1 patient with PsA who needs a second-line bDMARD from the iIL12/23 or iIL17 group. Only direct medical costs (drug costs) were considered. Cost minimization analysis and budget impact analysis were carried out.Results and discussion. The results of a network meta-analysis demonstrate no statistically significant differences in efficacy and safety between ixekizumab (IXE) and secukinumab (SEC) and superiority SEC over ustekinumab when used in adult patients with active PsA with insufficient response to or intolerance of previous therapy with synthetic disease-modifying antirheumatic drugs or TNFα inhibitors. The analysis of cost minimization showed that the total cost of 1 patient managing for 1 year using IXE is 26% lower than treatment with SEC: on a 2 year horizon, the difference is 27%. Analysis of the impact on the budget revealed that on the horizon of 1 year the simulated distribution will lead to budget savings of 16,796,131 rubles, which will allow additional treatment of 17 patients with IXE, after 2 years the budget savings will amount to 39,289,373 rubles, which will allow to treat additionally 52 patients. The sensitivity analysis confirmed the robustness of the study results.Conclusion. Thus, in adult patients with PsA requiring second-line bDMARDs, the use of IXE is more effective than the use of SEC and provides reduction in direct medical costs. The use of IXE will not have a significant impact on costs under the State Guarantee Program, but it can increase the availability of bDMARDs in patients with active PsA who have not responded to the previous therapy, without increasing the budget.
Mathematical study of the small oscillations of a finite cylindrical column liquid-gas under zero gravity
Authors: Essaouini Hilal , Capodanno Pierre 
Published: February 2021

This paper deals with the mathematical study of the small motions of a system formed by a cylindrical liquid column bounded by two parallel circular rings and an internal cylindrical column constituted by a barotropic gas under zero gravity. From the equations of motion, the authors deduce a variational equation. Then, the study of the small oscillations depends on the coerciveness of a hermitian form that appears in this equation. It is proved that this last problem is reduced to an auxiliary eigenvalues problem. The discussion shows that, under a simple geometric condition, the problem is a classical vibration problem.Â Â
New algorithm method for solving the variational inequality problem in Hilbert space
Authors: Hussein Maibed Zena 
Published: February 2021

Theipurpose of,thisipaper,is toiintroduce,aiconcept of generalizedinon_spreading,and define a new algorithm,for infinite,families of generalizedinon_spreading,and finite families of resolvent,mappings. Also, We study,the existence,solution of variational inequality,to a commonifixedipoint in Hilbertispaces. The main,results in this paper extendiand generalized,of many knowniresults initheiliterature.Â Â
Effects of different post-harvest treatments on bio-chemical characters and diseases of litchi in storage
Authors: Uddin Talukder Fakhar , Sohanur Rahman Md. , Kamrul Hassan Md. 
Published: February 2021

Objective of the study was to evaluate the effects of different post-harvest treatments on bio-chemical characters and diseases of litchi (Litchi chinensis Sonn, var. Bombai). The experiment consisted of two factors. Factor A: Temperature viz. T1: Ambient temperature, T2: 4ÂºC temperature; Factor B: PP bags (Polypropylene bag) viz. P1: Control (unwrapped), P2: 50 micro meter (Âµm) PP bag, P3: 75Âµmm PP bag, P4: 100Âµm PP bag. The experiment was conducted in completely randomized design (CRD) with three replications. Significant variation was observed in total soluble solid, PH of fruit pulp, vitamin c content, percent disease incidence and disease severity during the storage period. TSS contents increased up to the 6th day of storage and there after declined. pH values were maximum (4.14) in the fruits kept in 100Âµ polypropylene bag at ambient temperature. Vitamin C continent decreased with the increase of storage period. Disease incidence and severity progress with the storage period. Among the treated and untreated fruits, 75Âµm pp bag at low temperature (4ÂºC) treatment exhibited better storage performance. More research should be conducted by using other litchi cultivar like Bedana, China-3 etc. Various technologies have been devised to minimize the post-harvest losses of litchi, one of such technologies is the use of PP bag & low temperature.Â Â
Stochastic reservoir modelling for prospect mapping: a case study of ''bright'' field, Niger delta
Authors: Sunday Abe James , Taiwo Olowokere Mary , Adekunle Enikanselu Pius 
Published: February 2021

Deterministic reservoir modeling using geostatistical approach is inherently ambiguous because of the uncertainties contained in the generated reservoir models. Stochastic reservoir modelling using sequential gaussian simulation algorithm can resolve this problem by generating various realizations of petrophysical property models in order to map this uncertainties caused by subsurface heterogeneity. Suites of well logs for four wells with seismic data in SEG-Y format were used for this analysis. The wells were correlated and a reservoir was mapped across them in other to map their lateral extent, synthetic seismogram was generated in other to match the event on the seismic with that of the synthetic after carrying out a shift of -12ms. Seismic to well tie was done to ensure that the horizons were mapped accurately. The structural maps generated and the wells were input that goes into the stochastic modelling process. Five realizations each of facies(lithology), effective porosity, total porosity, net to gross, volume of shale and one realization for permeability and water saturation were generated. The facies models showed the distribution of sand and shale with sand at the existing well locations and the effective porosity, total porosity, net to gross, volume of shale models showed excellent values around the well location. Permeability and water saturation models showed that the existing wells were drilled at the flank of the anticlinal structure. Two drillable points (prospects) were proposed by considering all the initial petrophysical property models and the parameters of the two points named P1 and P2 showed that they contain hydrocarbon in commercial quantity. Stochastic reservoir modelling has proved effective in mapping uncertainties and detecting bypassed hydrocarbons.Â Â
Geomechanical characterization of mechanical properties and in-situ stresses for predicting wellbore stability of ATG-field, A case study: Niger delta petroleum province, Nigeria
Authors: Abraham Sunu Sebastian , Sunday Oniku Adetola , Chukwudi Meludu Osita , Patrick Abbey Chukwuemeka 
Published: February 2021

Well logs from ATG- field wells ATG-10 and ATG-11 were calibrated to develop Mechanical Earth Model (MEM) based on elastic parameter, failure parameters, in-situ stresses, pore pressure using well logs to predict wellbore failure. Poissonâ€™s ratio derived from compressional and shear velocities interval transit time and density logs (RHOB), showed that the values ranges from 0.17 to 0.48 and 0.09 to 0.49, and the dynamic Young's Modulus derived from the Compressional and Shear velocity Logs, ranges from 6.0 GPa to 7.8 GPa and 3.6 GPa to 6.6 GPa, the dynamic shear modulus derived from dynamic youngâ€™s modulus and Poissonâ€™s ratio which ranges from 3.8 GPa to 5.1 GPa and 2.1 GPa to 5.4 GPa, while the dynamic Bulk modulus ranges from 0.25 GPa to 1.67 GPa and 0.43 GPa to 1.18 GPa for wells ATG-10 and ATG-11 respectively. The calibrated failure parameters or rock strengths derived from compressional velocity logs include: the internal friction angle (Ï•) from Plumbâ€™s correlation, these ranges from 20.869o to 65.5o and 20.869o to 45.61o, Unaxial compressive (UCS) strength ranges from 757.837 psi to 2505.836 psi and 4577.099 psi to 10512.876 psi, cohesion Strength (C) ranges from 205.697 psi to 355.308 psi and 70.652 psi to 390.32 psi and Tensile strength (To) varies from 17.141 psi to 29.609 psi and 5.885 psi to 32.527 psi for well ATG-10 and ATG-11 respectively. The elastic and rock strengths properties vary in a similar trend to the sonic logs as they are derived based on these values. These properties show increasing values with increasing depth, as a result of larger overburden stress, hence lower porosity or high compressional velocity of the formations. However, the elastic properties and formation strength may vary in different formations.Â Â
Lithological attributes of hd-001 well, shallow offshore, Niger delta basin, Nigeria
Authors: A. Olatunji Olubusayo , A. Okosun Edward , S. Onoduku Usman , B. Alkali Yahya 
Published: February 2021

Lithological analysis was carried out on 96 ditch cuttings samples from HD-001 well located within the shallow offshore Niger delta basin, Nigeria. Three lithofacies sequences were delineated by the integration of wireline logs textural/lithologic attritudes and the distribution of index accessory minerals. They are transitional paralic, paralic and marine paralic sequences. The lithologic, textural and wireline log data indicate that the entire interval studied in the HD-001 well belongs to the Agbada Formation. The Formation is made up of alternating sand and shale units which suggests rapid shoreline progradation. The grain size increases from essentially fine to medium-grained at the basal part of the well to dominantly coarser grain at the upper part. The index accessories recognize shallow marine to coastal deltaic settings environment of deposition. Sand bodies which represent sub-environments within those settings are deposited in sequences. Each sequence begins with a transgressive phase followed by significant regressions.Â Â Â
New robust-ridge estimators for partially linear model
Authors: M. Elgohary Mervat , R. Abonazel Mohamed , M. Helmy Nahed , R. Azazy Abeer 
Published: February 2021

This paper considers the partially linear model when the explanatory variables are highly correlated as well as the dataset contains outliers. We propose new robust biased estimators for this model under these conditions. The proposed estimators combine least trimmed squares and ridge estimations, based on the spline partial residuals technique. The performance of the proposed estimators and the Speckman-spline estimator has been examined by a Monte Carlo simulation study. The results indicated that the proposed estimators are more efficient and reliable than the Speckman-spline estimator.Â Â
Uniqueness of approximate solutions to the Gelfand Levitan equation
Authors: A. Kincanon Eric 
Published: February 2021

This brief paper considers a potential issue of using iterative solutions for the Gelfand-Levitan equation. Iterative solutions require approx-imation methods and this could lead to a loss of uniqueness of solutions. The calculations in this paper demonstrate that this is not the case and that uniqueness is preserved.Â Â
X-ray fluorescence spectrometric determination of heavy metals in selected rice samples sold on the Liberian market: a case study conducted in Paynesville City, Greater Monrovia
Authors: James McClain , Plenseh Diana PAYE , Kokolo Nâ€™debewillie , Sampson K. P. CHEA , J. Boima Kiazolu 
Published: February 2021

Background: Environmental pollution with toxic heavy metals can be lead to the possible contamination of rice. Rice is a staple food widely consumed in the urban and rural parts of Liberia daily. Rice is cultivated in approximately 113 countries and a fundamental source for energy and protein. Objective: The study assesses selected heavy metals (As, Pb, Cd, Se, and Cr) concentration in selected imported rice and traditionally grown rice and bulgur wheat in Liberia. Methods: Six grade of imported rice, Bulgar wheat, and traditionally grown rice were purchased from the Duport Road and Red-Light markets in Greater Monrovia and analyze using X-ray Fluorescence Spectrometer. All data were analyzed using XLSTAT, and data was used to calculate the risk factor of each rice sample. Results: The mean concentration of heavy metal found in the rice as follow: As, 1.31ppm; Cd, 9.42ppm; Cr. 12.3ppm; Se, 5.73ppm; and Pb, 1.75ppm. The estimated daily intakes (EDIs) were calculated in combination with the rice consumption data. The mean intakes of As, Cd, Cr, Se, and Pb through rice were estimated to be 1.32, 9.42. 12.4. 5.74, and 1.75 mg/kg BW/day. Chromium has the average estimated daily intake. The combined hazard index for the heavy metals in each sample and the total cancer risk for each sample contributed most significantly to a cancer risk of rice consumption during adult life expectancy.Conclusion: The selected heavy metal concentration from the rice sample was above the FAO/WHO reference Standard but was within the range of the contaminant level except for chromium, which is above the accepted range. However, the hazard index and the total cancer risk indicate a potential non-carcinogenic and carcinogenic risk.Â Â
Plasmid Profile of Multiple Antibiotics Resistant (mar) Escherichia coli, Pseudomonas aeruginosa and Staphylococcus aureus Isolated from Water Samples from Ebira Communities in Ekiti South Senatorial District
Authors: Odeyemi Adebowale , Oluwole Olusola , Adebayo Adewole , Iseyemi Seyifunmi 
Published: February 2021

Plasmid curing of microbes and physicochemical analysis of water samples obtained from Ebira communities in six local governments in Ekiti SouthÂ Senatorial District were analyzed. Antibiotic sensitivity and profile of bacterial isolates were analyzed using pour plating, disk diffusion method and gelÂ electrophoresis techniques respectively while the plasmid were cured using acridine orange.Â The mean total bacterial count of the water samples collected from these six different local governments at different time ranged from 2.08 x 105 to 6.0 x 106 CFU/ml; the mean total coliform count ranged from 2.41 x 105 to 3.75 x 106 CFU/ml and the mean total Escherichia coli count (TEC) ranged from 1.53 x 105 to 3.45 x 105 CFU/ml. Total of 152 bacteria were recovered with E.coli having the highest distribution of 35% while Serratia marcensens had the least distribution of 0.7%. The highest antibiotic resistance of 100% was recorded against ceftazidine but only 17% of the isolates were resistant to gentamicin. About 56% of 34 selected MAR isolates carried plasmid(s) with high molecular weight ranging from 5.64Kbp to 23.13Kbp. Antibiotic resistance pattern and plasmids profile of selected MAR E.coli, Pseudomonas aeruginosa and Staphylococcus aureus prior to and after curing showed that Pseudomonas aeruginosa became susceptible to augmentin and Staphylococcus aureus also became susceptible to ceftriazole while E. coli still maintained the earlier resistant pattern. The plasmid profiling of these isolates after curing indicated the lost of plasmids in each of the isolates. Present study however implicated the incidence of MAR bacteria in the sources of water in Ekiti-South Senatorial district as a serious health challenge, and confirmed the potential of acridine orange for plasmid curing.
Phytoremediation of battery industry effluent through aquatic macrophytes
Authors: Rashid Mahrine , Ahmad Iftilkhar , Muhammad Ashique , Ul Hassan Mahmood 
Published: February 2021

Research was conducted to quantify the level of copper (Cu), chromium (Cr), cadmium (Cd) and lead (Pb) contamination in battery industry effluent and to assess the remediation potential of three invasive aquatic macrophytes Eichhornia crassipes, Pistia stratiotes and Hydrocotyle umbellata by growing on industrial effluent collected from Lead acid Battery industry.The effluent was heavily contaminated with Pb (10mg/l) and sulphuric acid (pH 2- 2.1). Due to high Pb concentrations and low pH (2-2.2) the plants were unable to survive. Mortality rate of E. crassipes was 96 % while P. stratiotes and H. umbellata were 100% rotten. The experiment was repeated after adjusting the effluent pH to 7-7.5 to increase the plant life.Plant parts and wastewater samples were analyzed after every 3 days interval uptil 21st day. The amount of Cr, Cd and Cu in the effluent was 0.076 mg /L, 0.036 mg /L and 0.097 mg /L, which was in permissible limits of NEQs (1.0 mg/l, 0.1 mg/l and 1.0 mg/l) respectively. Pb was found 10 times higher i.e. 10 mg/l than the permissible limit 0.5 mg/l. E. crassipes removed Pb>Cr>Cu>Cd while P. stratiotes and H. umbellata reduced Cd, Cr, Cu more than Pb from the effluent. E. crassipes was most efficient Pb removing plant in 21 days of experiment.Â Â
Evaluation of hybrid implant in posterior edentulous maxilla with inadequate bone
Authors: Aabu Varghese Dr. , Varghese Mani Dr. , Sankar Vinod V Dr. , Arun George Dr. 
Published: February 2021

Aim of this study is to investigate.Hybrid implant has got satisfactory results in our previous study in various edentulous areas with inadequate bone for endosseous implant placement .The credibility of the implant in the areas of posterior maxilla needed to be evaluated.Objectivesâ€¢Â Â Â Â Â To evaluate the hybrid implant postoperatively 18 months for gingival status, pain, peri-implantitis and mobility, so that it can be applied in posterior maxillary edentulous spaces with inadequate bone as an alternative to conventional implant.Materials and methods15 patients were rehabilitated in the posterior edentulous areas with hybrid implant. we intended to study the rehabilitation of posterior maxillary edentulous space i.e. Maxillary- premolar, 1st molar and 2nd molar area with hybrid implant and evaluate the hybrid implant post operatively for 18months (1stmonth, 3rd month, 6th month ,12 th month,18thmonth).Resultsâ€¢Â Â Â Â Â During the study period the implant system presented with no gingivitis, peri-implantitis, and pain.â€¢Â Â Â Â Â The periotest test values show the implant system to be very much stable.â€¢Â Â Â Â Â Also proves to be safe, economical and clinician and patient friendly compared to other implant systems.Conclusionâ€¢Â Â Â Â Â Hybrid implant system proves to be very effective in rehabilitating the posterior maxillary regions with inadequate bone.â€¢Â Â Â Â Â Also proves to be safe, economical and clinician and patient friendly compared to other implant systems.Â Â Â
Performance analysis of highly improved hybrid turbo codes for 4G wireless networks
Authors: Jose Raj M. , Sharmini Enoch Dr. 
Published: February 2021

Efficient error correcting codes are essential in modern digital communication systems. Highly Improved Hybrid Turbo Code (HIHTC) is a low complex error and efficient error correcting code with excellentBit Error Rate (BER) which is comparable to Low Complexity Hybrid Turbo Codes (LCHTC), Improved Low Complexity Hybrid Turbo Codes (ILCHTC) and other Hybrid Turbo Codes. Rate 1/3 HIHTC shows a BER of 10-5 for E b/No of 1.7 dB which is closer to the E b/No of Improved Low Complexity Hybrid Turbo Codes. In this paper we analyze the performance of HIHTC in comparison with otherLow Complexity Hybrid Turbo Codes, for their performance in 4G and 5G wireless networksÂ Â
Toxicological properties of activated carbons with saturated by cationic surfactant surface
Authors: V. Sharov Artem , M. Plotnikova Olga , I. Rykova Ðnna , V. Evseev Vadim 
Published: February 2021

The article discusses the effects of cetyltrimethylammonium bromide, sorbed on activated carbons, on vital signs of some living systems.Extracts from carbon, saturated with cetyltrimethylammonium bromide, were injected into the organisms of laboratory mice and soil samples. The biochemical blood parameters were determined from laboratory mice. In soils was determined the enzymatic activity, as well as the number of major groups of soil microorganisms.In mice, under the influence of surfactants on active carbons, the activity of enzymes associated with the functioning of the liver changes to a greater extent. The effect on the urease activity of the soil was not detected, the phosphatase activity under the action of surfactants increases, catalase and dehydrogenase - fall. The number of oligonitrophils, oligotrophs and amylolytics is reduced. A decrease in the effect of surfactant bonded to the active carbons surface on the systems as compared with free surfactants has been recorded.The increase in the number of ammonifiers with the introduction of surfactants can be used for microbiological cleaning of waste active carbone.Â Â Â
An invariant descriptor map for 3D objects matching
Authors: El Chakik Abdallah , El Sayed Abdul Rahman , Alabboud Hassan , Bakkach Amer 
Published: February 2021

Meshes and point clouds are traditionally used to represent and match 3D shapes. The matching prob-lem can be formulated as finding the best one-to-one correspondence between featured regions of two shapes. This paper presents an efficient and robust 3D matching method using vertices descriptors de-tection to define feature regions and an optimization approach for regions matching. To do so, we compute an invariant shape descriptor map based on 3D surface patches calculated using Zernike coef-ficients. Then, we propose a multi-scale descriptor map to improve the measured descriptor map quali-ty and to deal with noise. In addition, we introduce a linear algorithm for feature regions segmentation according to the descriptor map. Finally, the matching problem is modelled as sub-graph isomorphism problem, which is a combinatorial optimization problem to match feature regions while preserving the geometric. Finally, we show the robustness and stability of our method through many experimental re-sults with respect to scaling, noise, rotation, and translation.Â Â