Miracle-dz/UniFAR-FTUs huggingface dataset:
ESSAIS DE STABILISATION DE LA LATERITE AVEC LES FIBRES CELLULOSIQUES

RESUME :- Afin de valoriser les matieres premieres locales, des blocs de laterite comprimee ont ete stabilises par des fibres cellulosiques provenant du Cyperus papyrus (cyperus), fibres longues et du Manihot esculenta (manioc), fibres courtes. Ainsi, la plus grande valeur de la resistance a la flexion statique a sec, 2,5 MPa, a ete obtenue avec des blocs de laterite comprimee stabilises a 5% de fibres longues. A cette meme teneur, les blocs de laterite contenant les fibres courtes donnent une resistance inferieure, soit 1,69 MPa. De facon inattendue, a 10% de fibres courtes, la resistance a la flexion a sec des briques (2,47 MPa) est superieure a celle des briques a fibres longues a teneur egale (2,08 MPa). La resistance a la flexion humide de tous ces blocs apparait nulle avec, cependant une conservation du reseau des blocs de laterite contenant les fibres cellulosiques du cyperus et du manioc a des teneurs superieures ou egales a 5%. Les briques absorbent l'eau de remontee capillaire en fonction de leur teneur en fibres cellulosiques et de la nature de ces dernieres. Pour les briques non stabilisees, le pourcentage d'eau absorbee est de 9,5%. A 7,5% de fibres longues, il n'est plus que 6,0%, alors qu'a 10% de fibres longues, il monte a 15,3% pendant que celui des fibres courtes atteint la valeur de 16,2% au bout d'une periode de 22 heures. Mot cles: laterite, briques stabilisees, fibres cellulosiques, resistance a la flexion, absorption par capillarite. ABSTRACT :- In order to give added value to local raw materials, compressed laterite bricks have been stabilised with cellulose fibres of Cyperus papyrus (cyperus), long fibres and Manihot esculenta (cassava), short fibres. The highest value of the dry flexural resistance, 2.53 MPa, was obtained with blocks stabilised at 5% long fibres content. At the same content the blocks of laterite containing short fibres gave a dry flexural resistance of 2.47 MPa which is higher than the value of 2.08 MPa for long fibres. The wet flexural resistance of all blocks is zero. But it can be noted that bricks containing cellulose fibres of cyperus and cassava at percentages higher or equal to 5% conserve their shape during complete immersion. The bricks absorbed water by capillarity depending on the nature and the percentage content of cellulose fibres. After a period of 22 hours, bricks containing 7.5% long fibres absorbed 6.0% water, less than 9.5% for unstabilised bricks; while at 10% of long fibres, absorption increased to 15.3%. In the same period, with 10% short fibres, the percentage water absorbed rose to 16.2%, indicating the better performance of the longer fibres. Key words : laterite, stabilised bricks, cellulose fibres, flexural resistance, absorption by capillarity. African Journal of Science and Technology Vol.5(1) 2004: 22-28
Particle modelling of inductively-coupled argon plasmas with wafer biasing

The characteristics of axisymmetrical inductively-coupled argon plasmas with wafer biasing are examined using the particle-in-cell Monte Carlo method. The simulation is performed on the condition that gas pressure is fixed at 5 mTorr and power deposition is at 200 W. The effects of bias frequency and bias voltage on the distributions of flux and energy of the ions that are incident onto the wafer are investigated. The bias frequency and bias voltage are changed from 2 MHz to 13.56 MHz and 100 V to 300 V, respectively. The plasma structure is largely influenced by the wafer biasing. The ion energy distribution strongly depends on the bias frequency, bias voltage and sheath thickness. Decreasing the bias frequency results in the improvement of the uniformity of ion flux. These results are consistent with the previous theory.
Comparison of High-Flow and Conventional Nasal Cannula Oxygen in Patients Undergoing Endobronchial Ultrasonography

Oxygen therapy is required to prevent hypoxemia during the endobronchial ultrasonography (EBUS) procedure. Oxygen can be delivered at low or high flow rate. The aim of this study was to compare the effectiveness of oxygen therapy delivered via high-flow nasal cannula (HFNC) and conventional nasal cannula (CNC) on oxygen saturation and cardiac parameters in patients undergoing EBUS. Patient compliance and satisfaction were also evaluated at the end of the procedure.This single-center prospective interventional study was conducted in a tertiary hospital among patients who presented to the EBUS unit in 2018 and 2019. Patients were randomly assigned to the HFNC group (n=85) or the CNC group (n=85). The study included 170 patients (111 men and 59 women) with a mean age of 58 ± 14 years. There were no significant differences between the HFNC and CNC groups in terms of demographic characteristics or baseline follow-up parameters. End-of-EBUS oxygen saturation was significantly higher in the HFNC group (P
Synthesis design strategies to anisotropic chalcogenide nanostructures

The array of low dimensional nanostructured chalcogenides now known is substantial, both in terms of the number of different compounds formed and in terms of the diversity of nano- and microstructures that these compounds adopt. Size, shape, structure (and composition) can each have profound effects on the physical properties of chalcogenide nanostructures and in turn controllable, well-understood synthetic routes are absolutely vital to their growth and subsequent characterisation and exploitation. This Highlight assesses the options open to the inorganic synthetic nanomaterials chemist in producing “made to measure” solids at the nanoscale and examines the commonality in these approaches towards rational nanostructural design.
Research on Text Classification Algorithm Based on Machine Learning

In the era of big data, the data we analyze is no longer limited to numbers, while even more data analysis is based on text. Facing massive and complex data, traditional analysis methods cannot effectively process text data. Manual processing of text data not only consumes a lot of time and manpower, but also it is difficult to ensure the fairness and objectivity of the assessment. The development of machine learning provides us with an effective method of text mining. This article will introduce three classic algorithms in machine learning for elaboration, and apply them into a specific experiment to show the wisdom of machine learning in the field of text classification.
A Provincial Youth Population Analysis In Terms of Time And Space: The Case of Turkey

The youth age period (0-14 age), which is one of the most important periods of human life, is also an important demographic indicator for countries. In this study, youth population, twenty five percent of the total population in Turkey, is examined from the perspective of time and space on provincial level. The traditional coefficient of variation (CV) approach was used to analyze the development of the young population parameter over time. Behind, Moran I index value, which has become a traditional method, has been used to measure the distribution of the young population parameter in space. According to the CV results, the youth age population diversity increases slightly between the provinces from 2007 to 2018. In the 0-4 age group shows high spatial pattern along the southeastern and eastern provinces. High spatial pattern is observed in 5-9 groups of central and northeast provinces. 0-4 and 5-9 age groups of these two regions are almost displaced by spatial pattern. The variety between the provinces is lower in the 10-14 age group. All of these findings shows that, in spatial terms, the young population in Turkey reveals a rapid change especially to 0-4 and 5-9 age groups. Population changes are often the subject of long-term analysis. This study shows that the population structure of countries can transform in the short term. In fact, the change in time and space dimensions of Turkey's youth population structure has been realized in a short time. This finding could lead policymakers on shorter term demographic solutions.
Remote area power supply system for oil leakage detection systems and stop valves drives for pipelines

This paper describes problem of electrical power supply of data collection points for leakage detection and stop valve control systems, designed for emergency shutoff of fault parts of oil pipelines in areas without centralized power supply. Autonomous electrical power supply complex, based on thermoelectric generators and photovoltaic panels, was proposed as a solution. Structure and parametric sufficiency of power supply system were established. Computer model for estimation of autonomous power system effectiveness was developed and validated.
La théorie générale des couches minces

HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L’archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d’enseignement et de recherche français ou étrangers, des laboratoires publics ou privés. La théorie générale des couches minces Florin Abelès
Associations between migration and commuting to work in the Metropolitan Region of São Paulo

INTRODUCTION Commuting and migration are important factors in the population ́s redistribution and the occupation of Brazilian territory. Both types of mobility are historically linked to structural transformations that occurred in Brazilian society in recent decades, such as the remarkable increase in population size, modernization, industrialization and urbanization (MATOS; BAENINGER, 2004). The determinants of both types of mobilities resemble each other in many aspects, as there are many factors that affect both migration and commuting, such as personal attributes (sex, age, race, civil status, schooling level, labor market participation, etc.), household characteristics (income, household arrangement, etc.), and regional features (accessibility, local amenities, unemployment rates, etc.) (BORJAS; BRONARS; TREJO, 1992; CHISWICK, 1978; CLARK; HUANG; WITHERS, 2003; CRANE, 2007; CUNHA, 2012; EVERS; VAN DER VEEN, 1985; LEE; MCDONALD, 2003; MATOS; BAENINGER, 2004; STARK; BLOOM, 1985; SANDOW; WESTIN, 2010). Moreover, migration and commuting can cause or be caused by one another. For instance, commuters can migrate to reduce displacement costs, in particular psychological costs due to traffic jams (SHUAI, 2012). On the other hand, migrants can turn into commuters due to changing their places of residence while not changing jobs. In fact, there are many connections between the two types of spatial mobility, a topic investigated by different authors (AXISA; SCOTT; NEWBOLD, 2012; CHAMPION; COOMBES; BROWN, 2009; FINDLAY et al., 2001; GREEN; HOGARTH; SHACKLETON, 1999; LUKIC, 2009; RAMALHO; BRITO, 2016; REITSMÃ; VERGOOSSEN, 1988; RENKOW; HOOVER, 2000; ROMANÍ; SURIÑACH; ARTÍS, 2003). Intrametropolitan migration is particularly connected to
Molecular detection of Babesia canis vogeli and Hepatozoon canis in dogs in the department of Magdalena (Colombia)

The canine population in the cities of Ciénaga and Santa Marta has been estimated at 54,953 based on individual dogs with owners. Due to the role that dogs play in society, either as pets or as transmitters of zoonoses to humans, we conducted a study with 169 blood samples from dogs that visited two veterinary clinics in these locations between March and September of 2017. The objective of the study was to detect species of Babesia and Hepatozoon canis by amplifying the 18S gene using conventional polymerase chain reaction (PCRc). The presence of Babesia sp. and Hepatozoon canis was detected in 15 (8.87%) and 12 (7.10%) DNA samples, respectively. In addition, 7 (4.14%) cases of coinfection were recorded. The Babesia sp. sequences obtained corresponded to the B. canis vogeli subspecies. This both pathogens in the Colombian Caribbean region and cases of coinfection in Colombian dogs. Therefore, the national veterinary community is encouraged to consider the information presented here in their differential diagnoses associated with companion vector-borne diseases (CVBDs). This information will allow veterinary professionalsto create control and prevention strategies to prevent the spread of these infections.
Results of the Toxoplasmosis Screening in 9311 Pregnant Women in a Tertiary Center in Turkey

Introduction: Toxoplasma gondii is an important parasite that can cause permanent sequelae to the fetus when infected during pregnancy in humans. Although the frequency of this parasite varies widely between countries, it is known that it is common in our country. The aim of this study was to determine the seroprevalence of toxoplasma in pregnant women admitted to a tertiary hospital in central Anatolia and to evaluate the pregnancy outcomes together with seroprevalence. Materials and Methods: A total of 9311 patients admitted to a tertiary hospital between January 2016 and December 2018 were included into the study. After serological examination, avidity test was performed in cases suggestive of acute infection. Amniocentesis was recommended to be performed by Polimeraze Chain Reaction (PCR) in patients with low avidity. Results: The frequency of Toxoplasma immunoglobulin (Ig) G and M seropositivity rates were 20.3% and 0.28%, respectively. Low avidity was found in approximately 27% of the patients with IgM positivity, and only 15.4% had low avidity by confirmatory test. One patient could not be reached during follow-up. PCR was performed in 4 patients whose low avidity value was confirmed by re-tests and all of their PCR results were reported negative. No cases of congenital toxoplasmosis were detected during the 3 years in our clinic. Conclusion: The inclusion of toxoplasma in routine screening programme is still controversial and differs between countries. Screening in areas with a high rate of toxoplasma, such as in our country, may be rational. If infection is detected, treatment may be recommended because it may reduce the transmission to the fetus.
Drugs with Inhibitory Potentials on Polyol Pathways of Diabetic Neuropathy: An Overview

About one third of diabetic patients develop diabetic foot problems that may originate from peripheral neuropathy and or peripheral neurovascular disease. Because of chronic and difficult to treat nature of diabetic foot ulcers, there is need for literature search with intent to understanding neuropathic and neuroischaemic nature of diabetes in order to control, prevent and treat diabetic foot ulcers. Findings have shown that inhibitors of aldose reductase, sorbitol dehydrogenase, activation of protein kinase C, activators of nitric oxide synthase, myo-inositol bisphosphatase, and other enzymes that play different roles in polyol pathway of diabetic neuropathy are the key points to prevention, control, management and treatment of diabetic foot ulcers. The use of central nervous system acting drugs, potent antimicrobials and traditional antidiabetics are complementary to holistic permanent cure of the disease. More potent antidiabetic ulcers could be synthesized from varieties of heterocyclic compounds reported in many journals of organic, pharmaceutical and medicinal chemistry. Therefore, successful treatment of diabetic foot ulcers is multimodal, but the major key success is constant adequate control of blood sugar. ISSN 2639-9326 Review Article Citation: Saganuwan Alhaji Saganuwan. Drugs with Inhibitory Potentials on Polyol Pathways of Diabetic Neuropathy: An Overview. Diabetes Complications. 2020; 4(3); 1-7.
Theory of micelle formation by amphiphilic side-chain polymers

Le modele microscopique developpe pour decrire la micellisation des polymeres en peigne amphiphiles predit l'energie libre en la taille des micelles et la composition de la phase micellaire. La longueur minimale de la chaine principale et celle de la chaine laterale hydrophobe necessaires a la formation de micelles a molecule unique sont calculees. L'effet de la concentration en sel, de la fraction en volume du polymere et des dimensions du polymere sur la composition de la phase micellaire et la distribution de taille des micelles est discute
A re‐examination of exchangeable acidity as extracted by potassium chloride and potassium fluoride

Abstract In order to better understand some of the factors likely to affect measurements of KC1 extractable acidity, experiments were conducted using synthetic solutions and extracts from a wide range of contrasting soils. The reagents used for measuring exchangeable acidity (i.e., KC1 and KF) were also examined to evaluate the effects of chemical impurities on acidity measurements. Two commonly used titrimetric methods were adapted and tested to determine the accuracy and precision of acidity measurements. The exchangeable acidity of soil extracts was investigated by extraction methods, extractant concentration, and extractant volume. Results from the soil extract experiments indicated that continuous shaking has no significant effect on acidity measurements. Filtration, however, is critical, especially for acidic organic‐rich soils, since aluminum (Al) ions can be lost during centrifugation. Extractant concentration and volume had variable effects on the acidity measurements for individual soils. In general, the modified Yuan's method is preferable to the modified Thomas’ method for estimating exchangeable Al. To ensure successful determination of exchangeable acidity, we recommend using a wider KCl:soil ratio (>15:1, v/w) for organic soils with low base saturation and allophanic Andisols. In sum, potassium chloride and potassium fluoride extraction for estimating exchangeable acidity is applicable for most soils.
Feasibility Study on Welding Structure of the HT-7U Toroidal Field Coil Case

The Toroidal Field (TF) coil case of the HT-7U superconducting tokamak device is made of austenitic stainless steel 316LN and is designed to operate at cryogenic temperature (4 K). 316LN can retain high strength and fracture toughness at 4 K. Feasibility study on technical process of welding has been experimentally considered as a hopeful joint method for suppression of post-welding deformation and reduction of over-heating. Meanwhile the final range of stress intensity and the stress intensity factor (K) for pre-cracks of welding structure have been determined by using J-integral. These related results are optimistic and have shown that there's no problem in strength and fracture toughness at the vicinity of the pre-crack tip. This paper introduces the welding structure of TF coil case in detail.
Hybrid energy storage: high voltage aqueous supercapacitors based on activated carbon–phosphotungstate hybrid materials

The use of hybrid electrodes prepared from phosphotungstic acid (H3PW12O40, PW12) and activated carbon (AC) allows the fabrication of highly durable aqueous supercapacitors operating at a superior voltage (1.6 V) thanks to the high overpotential of PW12 towards H2 generation. The combination of the double-layer capacitance plus the redox activity of the polyoxometalate clusters leads to an intrinsic increase in specific capacitance (from 185 F g−1 for AC to 254 F g−1 for AC–PW12) and a 60% increase in the operating voltage (compared to conventional AC supercapacitors with aqueous electrolytes, e.g. 1 M sulphuric acid). The hybrid energy storage mechanism and the increased operating voltage converge to yield improved specific energy and power. Moreover, the hybrid AC–PW12 electrode material showed an outstanding stability even after 30 000 cycles (0 to 1.6 V) with 98% retention of the initial capacitance, much superior to the stability of the parent supercapacitor based on plain AC under the same conditions.
Enzymatic hydrolysis of a chemisorbed peptide film using beads activated with covalently bound chymotrypsin

Silica and polyacrylamide microspheres were modified with chemisorbed chymotrypsin and used to enzymatically hydrolyze a peptide thin film which was covalently bound to a flat silica surface. Chymotrypsin was covalently cross-linked to 500 nm silica spherical beads and 30-50 μm polyacrylamide spherical beads and shown to be enzymatically active against thin films of a fluorescent peptide, succinyl-ala-ala-phe-7-amido-4-methylcoumarin (SAAP-AMC), and an unlabeled peptide, t-BOC-phe. SAAP-AMC and t-BOC-phe were covalently coupled to an aminosilane film on silica and aluminum substrates through an amide linkage. Control experiments showed that free chymotrypsin in solution was able to hydrolyze the amide bond between the phenylalanine and the AMC groups of the chemisorbed peptide, resulting in the release of the AMC group into solution. When they were placed into contact with the SAAP-AMC surface, the chymotrypsin-modified beads also hydrolyzed the phe-AMC bond and released AMC into solution, demonstrating that covalently immobilized enzymes can be used to hydrolyze immobilized organic thin films. The hydrolytic activity of the chymotrypsin beads was also confirmed for a second peptide film, t-BOC-phe, by external reflectance IR spectroscopy.
Tool-Work Contact Ratio and Parametric Influence in Ultrasonic Vibration–Assisted Turning of Ti6Al4V Alloy

The performance of the machining process depends on the time of contact of the cutting tool with the workpiece. In this work, the effect of vibrating and cutting parameters on tool-work contact ratio (TWCR) in ultrasonic vibration–assisted turning (UVAT) is evaluated. Machining performance is measured in terms of average cutting force, cutting temperature, and average surface roughness. Full factorial experiments are conducted on a Ti6Al4V alloy to evaluate the performance of the UVAT process in terms of TWCR. The performance of the UVAT process is analyzed and compared with the conventional turning process at various conditions, such as intensity of ultrasonic power (80, 90, and 100 %), cutting speed (10, 30, and 50 m/min), feed rate (0.055, 0.103, and 0.161 mm/rev), and depth of cut (0.1, 0.3, and 0.5 mm). The cutting force, cutting temperature, and surface roughness are decreased with the increase in percentage intensity of ultrasonic power. The effectiveness of UVAT process is greater at higher levels of vibrating parameters and lower levels of cutting parameters in the selected range. Finally, it is concluded that the maximum benefit from the UVAT process is obtained at TWCR of 0.136 and its effect is dominant at lower levels of cutting conditions. However, the effect of thermal loading is dominant at higher levels of cutting conditions in the selected range.