Miracle-dz/UniFAR-FTUs huggingface dataset:
ELECTRICAL RESISTIVITY MEASURMENTS OF CH 4 HYDRATE-BEARING SANDSTONE DURING FORMATION

Resistivity measurements are acquired during and after drilling wells through hydrate‐bearing intervals and are often used in correlation with other logs to determine gas hydrate concentrations. In order to properly interpret the acquired data reliable calibration data are needed. Resistivity changes during hydrate formation can also give insights into how and where the hydrate forms in the pore space, and can be used to build permeability correlations. Electrical resistivity measurements were performed on sandstone cores during methane hydrate formation under differing conditions of initial water saturation and brine composition. A two-electrode sample holder was designed to fit inside a magnetic resonance imager in order to take advantage of its monitoring capabilities. Hydrate saturation was determined from the quantity of liquid water still present in the core. A four-electrode system was used without imaging possibilities, and the agreement between the two setups was good. R0 was measured on this system using a range of salinities. The two-electrode system worked well during hydrate formation with little variation in phase angle that result from changes in electrode contact with the sample. In all cases, an initial decrease in resistivity was observed at the beginning of hydrate formation. This was likely due to ion exclusion during hydrate formation that initially reduced the brine’s resistance. This effect was less pronounced at higher initial water salinity values. As hydrate continued to form, reduced pore connectivity and increased tortuosity through the core led to a significant increase in resistivity. Resistivity values were higher than what have been reported by others. The interpretation of Archie’s Formation Factor and Resistivity Index was problematic. The saturation exponent was found to be lower than expected in all of the experiments performed. Dynamic Rw and R0 values were incorporated into Archie’s equations to account for changes in brine composition during hydrate formation. Based on this study we propose that Archie’s basic model needs to be modified to account for chemical changes during hydrate growth.
Physico-chemical Changes in Plain and Fly Ash Modified Concretes Exposed to Different Deicing Chemicals

The deicing/anti-icing chemicals are routinely used on pavement surfaces during cold weather to ensure safe driving conditions. Traditionally, solid rock salt (NaCl) or NaCl brines have been used for these purposes but their efficiency is reduced at lower temperatures. In order to provide a more reliable means of ice and snow control, chemicals with lower freezing points, such as CaCl2 or MgCl2 (or sometimes rock salt pretreated with CaCl2 or MgCl2 brines,) are increasingly being applied to the pavements. The extent and magnitude of chemical reactions of these “new-generation” deicers with pavement concrete is still somewhat unclear. This paper presents the results of investigation of the physicochemical changes in pavement concretes exposed to different deicers and subjected to both wetting/drying (W/D) and freezing/thawing (F/T) regimes. Plain concretes (PC) and concretes with 20% of mass of cement replaced by Class C fly (FA20) were exposed to three different types of deicing solutions (NaCl, CaCl2 and MgCl2), with total ion molality of, respectively, 10.5 for W/D and 5.5 for F/T regimes. For comparison purposes, additional set of specimens was kept in deionized water (DIW) under similar exposure regimes. The companion set of control specimens was kept in saturated limewater at 23C. The physical alterations taking place in the prismatic (76x76x292 mm) specimens were evaluated weekly by measuring changes in mass and in the relative dynamic modulus of elasticity (RDME) of the specimens. After 154 W/D cycles prismatic specimens exposed to 28% CaCl2 solution exhibited considerable visual distress, reduction in mass, and reduction in RDME. The same deicer also caused reduction in mass and in RDME after only 35 F/T cycles. The performance of fly ash modified concretes was better than that of PC in all deicing solutions under both W/D and F/T regimes. To ensure a unidirectional penetration of deicers, several 76 mm diameter concrete cylinders were ponded with the same deicing solutions as the prismatic beams while being exposed to W/D cycles. These cylinders were used to prepare the SEM analysis samples.
Anonymous broadcasting with a continuous-variable topological quantum code

Broadcasting information anonymously becomes more difficult as surveillance technology improves, but remarkably, quantum protocols exist that enable provably traceless broadcasting. The difficulty is making scalable entangled resource states that are robust to errors. We propose an anonymous broadcasting protocol that uses a continuous-variable toric-code state, which can be produced using current technology. High squeezing enables large transmission bandwidth and strong anonymity, and the topological nature of the state enables local error correction.
The Relationship Between Compulsive Internet Use and Symptoms of Depression and Anxiety in Adolescence

Correspondence to: Tena Erceg Kindergarten “Konavle” Put od Cavtata bb, 20210 Cavtat E-mail: tena.erceg1@gmail.com Tel: +385 98 1960035 Copyright © 2018 KBCSM, Zagreb e-mail: alcoholism.kbcsm@gmail.com • www.http://apr.kbcsm. hr Abstract Difficulties in managing one`s habits of internet use have been the focus of much clinical and scientific interest in the past twenty years. However, their definition, clinical nature, and relationships with other relevant concepts, remain a matter of controversy. The aim of this study was to examine the relationship between compulsive internet use (CIU) and symptomatology related to depression and anxiety among adolescents. The sample consisted of 1320 primary and secondary school students aged 11 to 18 years. Problematic patterns of internet use were assessed using the Compulsive Internet Use Scale, while depression and anxiety symptoms were measured using Beck Youth Depression Inventory and Beck Youth Anxiety Inventory. The results have shown that adolescents who report more compulsive patterns of internet use also show higher levels of depression and anxiety symptoms. The findings contribute to the understanding of problematic internet use in adolescents and its relationship with internalizing emotional difficulties, which suggests valuable implications for the development of prevention and intervention programs within the adolescent population.
Could Proprioceptive Stimuli Change Saddle Pressure on Male Cyclists during Different Hand Positions? An Exploratory Study of the Effect of the Equistasi® Device

When pedaling, the excessive pressure on the seat has the potential to produce injuries and this can strongly affect sport performance. Recently, a large effort has been dedicated to the reduction of the pressure occurring at the saddle region. Our work aims to verify the possibility of modifying cyclists’ pedaling posture, and consequently the pressure on the saddle, by applying a proprioceptive stimulus. Equistasi® (Equistasi srl, Milano, Italy) is a wearable device that emits focal mechanical vibrations able to transform the body temperature into mechanical vibratory energy via the embedded nanotechnology. The data acquired through a pressure mapping system (GebioMized®) on 70 cyclists, with and without Equistasi®, were analyzed. Pedaling in three positions was recorded on a spin trainer: with hands on the top, hands on the drop handlebar, and hands on the lever. Average force, contact surface, and average and maximum pressure each in different regions of the saddle were analyzed, as well as integral pressure time and center of pressure. In the comparisons between hands positions, overall pressure and force variables were significantly lower in the drop-handlebar position at the rear saddle (p < 0.03) and higher in hand-on-lever and drop-handlebar positions at the front saddle (p < 0.01). When applying the Equistasi device, the contact surface was significantly larger in all hand positions (p < 0.05), suggesting that focal stimulation of the lumbar proprioceptive system can change cyclists’ posture.
Longitudinal study into the determining factors of dental caries in children aged 4: socio-behavioral aspects and oral health of pregnant women

ABSTRACT ObjectiveTo analyze the influence of oral health conditions and socio-behavioral characteristics of pregnant women on the development of caries and their children’s experiences, after 4 years of follow-up.MethodsIt was conducted a longitudinal study of mother/child pairs by interview and oral clinical examination during pregnancy. Regular observations were made until the child had reached four years of age, at which time we performed a clinical examination of the children (n=73). The variables studied were: presence of caries in pregnancy (DMFT) and the child (deft), visit to the dentist, oral hygiene habits, diet, socioeconomic and behavioral factors, and were related to two study outcomes: presence of caries during the examination and experience of caries (deft≥1) in children of 4 years of age. Bivariate and logistic regression analyses were conducted with the variables (p<0.05 and 95% CI). ResultsThe average DMFT index of mothers during pregnancy was 12.09 (±2.88) and average deft index of children at 4 years was 1.79 (± 6.1). In the multiple logistic regression analysis, the presence of caries in children was associated with the presence of harmful habits (p=0.04). Caries in the child was statistically associated with brush sharing among family members (p=0.02). ConclusionThe results suggest that behavioral aspects are related to the presence and experience of caries in childhood.Indexing terms: Dental caries. Longitudinal studies. Oral health. Risk factors. Socioeconomic factors.
In vitro Antibacterial Studies on Essential Oils from Juniperus communis L .

Juniperus communis belongs to family Cupressaceae, yields 0.25 per cent of essential oil, resin, juniperin and organic acids. The active ingredients are antimicrobial, aphrodisiac and styptic in nature and are useful in treatment of ashthma, chronic bronchitis and diseases of liver and spleen. Shade dried leaves of plant were extracted with petroleum ether, ethanol and methanol and evaporated in vacuo to obtain the crude extract. Zone of inhibition and minimum inhibitory concentration (MIC) of plant extracts were evaluated by Microtiter plate method. Antibacterial assays of extracts showed considerable inhibition capacity and Extracts also displayed remarkable minimum inhibitory concentrations (≥20 μg/ml) which was significant compared to that (≥30 μg/ml) of the reference antibiotic.
Potential cyber-threats against Canada’s critical infrastructure: an investigation of online discussion forums

ABSTRACT Critical infrastructures (CI) are connecting their systems to the internet at an increasing rate, providing the opportunity for malicious actors to attack these systems using cyber-weapons. Compromised systems then pose issues for the affected company, and may disrupt the broader population. The purpose of the current study was to analyze IP addresses collected from discussion forums, with a specific interest in which Canadian CIs could potentially be at risk of a cyber-attack. Overall, 897,524 IP addresses were extracted from 47,134,503 posts across 20 discussion forums, 39,164 of which were associated with Canadian CI. Of all Canadian CI sectors, the majority of IP addresses were found to belong to the information and technology sector. A thematic analysis of posts containing IP addresses was conducted, revealing that the majority of posters were sharing large lists of IP addresses with no context given. Lastly, a keyword search was employed on the forums in an attempt to understand discussions surrounding CI. A thematic analysis was employed on a random sample of posts containing keywords, revealing two major themes: Potential threat and threat information. Findings from this study reveal that information useful for conducting cyber-attacks against CI is being shared within these online forums.
Management of Acute Lithiasic Cholecystitis in a Secondary Hospital: Sominedolo Hospital in Moptiepidemiological Aspects, Risk Factors, Diagnosis, Treatment and Evolution

Citation: Bréhima Traoré. , et al. “Management of Acute Lithiasic Cholecystitis in a Secondary Hospital: Somine Dolo Hospital in Mopti Epidemiological Aspects, Risk Factors, Diagnosis, Treatment and Evolution”. Medicon Medical Sciences 2.6 (2022): 11-21. B Traoré1, M Coulibaly2, D Traoré1, O Guindo3, A Traoré4, D Cisse1, P Coulibaly5, S Mariko6, A Guindo1, DT Théra1, ARB Sidbé7,KI Keita8, MS Konate9, FM Keita10, S Toure10, D Samaké11 and AP Togo12 1Department of General Surgery, Sominé DOLO Hospital of Mopti 2Department of Biomedical Laboratory, Sominé DOLO Hospital of Mopti 3Department of Public Health, Sominé DOLO Hospital of Mopti 4Department of Anesthesia/resuscitation and operating room, Sominé DOLO Hospital of Mopti 5Department of Gyneco-obstetrics, Sominé Dolo Hospital in Mopti 6Department of Gyneco-Obstetrics, Hospital of Mali 7ICRC Surgeon General Surgery Department, Sominé DOLO Hospital, Mopti 8Department of General Surgery, Sikasso Referral Health Centre 9Department of general surgery, Mopti Garrison Infirmary 10Department of general surgery, Kati Military Polyclinic 11Department of Medicine, Sominé Dolo Hospital of Mopti 12Department of General Surgery, CHU Gabriel Touré *Corresponding Author: Dr Bréhima Traoré, General surgeon, research fellow in general surgery at CNRST/Mali. Received: May 27, 2022; Published: June 01, 2022 DOI: 10.55162/MCMS.02. 039
The Detailed Chemical Abundance Patterns of M31 Globular Clusters

We present detailed chemical abundances for >20 elements in ∼30 globular clusters in M31. These results have been obtained using high resolution (λ/∆λ ∼24,000) spectra of their integrated light and analyzed using our original method. The globular clusters have galactocentric radii between 2.5 kpc and 117 kpc, and therefore provide abundance patterns for different phases of galaxy formation recorded in the inner and outer halo of M31. We find that the clusters in our survey have a range in metallicity of −2.2 20 kpc have a small range in abundance of [Fe/H]=−1.6±0.10. We also measure abundances of alpha, rand s-process elements. These results constitute the first abundance pattern constraints for old populations in M31 that are comparable to those known for the Milky Way halo.
Elasto-capillary adhesion: Effect of deformability on adhesion strength and detachment

We study the interaction between capillary forces and deformation in the context of a deformable capillary adhesive: a clamped, tense membrane is adhered to a rigid substrate by the surface tension of a liquid droplet. We find that the equilibrium adhesive force for this elastocapillary adhesive is significantly enhanced in comparison to the capillary adhesion between rigid plates. In particular, the equilibrium adhesion force is orders of magnitude greater when the membrane is sufficiently deformed to contact the substrate. From a dynamic perspective, however, the formation of a fluidfilled dimple slows this approach to contact and means that stable attachment is only achieved if adhesion is maintained for a minimum time. The inclusion of a variable membrane tension (as a means of modifying the deformability) gives additional control over the system, allowing new detachment strategies to be explored.
ABIOTIC FACTORS AFFECTING SEED GERMINATION AND EARLY SEEDLING EMERGENCE OF LARGE CRABGRASS ( Digitaria sanguinalis ) Fatores

ABSTRACT Large crabgrass is a worst exotic weed in tropical, subtropical, and temperate regions of the world. In this study, the abiotic factors affecting seed germination and early seedling emergence of large crabgrass were investigated under laboratory conditions. The optimum temperatures of germination occurred at the range from 25 to 35 oC under 12 h light/12 h dark condition. Some seeds could germinate in the dark, but light exposure significantly stimulated the germination. Large crabgrass seed was tolerant to salinity level range of 0 to 160 and low water potential (11% germination at -0.8 MPa). Medium pH had no significant effect on seed germination and more than 90% seeds germination was obtained over a broad pH range from 4.0 to 10.0. Seed germination was significantly influenced by heatshock and completely inhibited at 140 oC for 5 min. The greatest seedling emergence rate was 96% when seeds were planted at a soil depth of 1 cm. Knowledge of germination biology obtained from this study will be useful in the development of the integrated weed management strategies for this species, and to avoid its establishment as a troublesome weed in economically important cropping regions.
Class and Gender Roles: Narratives of Highly Skilled Mexican Women Migrants in Australia

ABSTRACT This article explores gender role experiences interconnected with class among women of Mexican origin who have migrated to metropolitan Melbourne, Australia. Drawing on qualitative research data from twenty middle high-class and upper-class high-skilled Mexican women, and using an intersectionality prism via Anthias’s translocational positionality, we argue that the personal journey of highly skilled Mexican women’s migration/mobility and located adaptation brings changes to their social class/status and gender role identities. We attempt to ascertain how and why they re-evaluate, challenge, or renegotiate their Mexican class privileges, roles as professionals and as women, and how those roles relate to Australian social ordering. Their experience narratives highlight that most go through challenges in this renegotiation. From the participants’ point of view, some have renegotiated roles within their family units. At work, some feel recognized as professionals in a space which enables them to develop a deep sense of agency and make independent choices.
On Thin Ice : The Mechanics of Failure in Sea Ice

Sheets of floating ice are rarely at rest or found in isolation. They are driven by wind and water stresses and hence collisions with other sheets are unavoidable. The focus of this report is on the mechanical aspects of slow collisions between thin sheets of floating ice. Such interactions underlie the mosaic of patterns found in the world’s most extensive bodies of floating ice — sea ice — and hence are of geophysical importance. However, we are drawn to the topic by the simple fact that the patterns resulting from collisional interactions are visually arresting and may have mechanical implications that extend beyond the system that motivates our work. We begin with a description of some of the phenomenology that we aim to understand. In sea ice, where the “sheets” of relevance are called “floes”, collisions are observed to create three families of patterns. The creation of each family, which can be characterized by a post-collision pattern or morphology, can be envisioned either as the result of the compression of a single sheet, or floe, of ice that fails and forms two floes which continue to collide, or the collision between two pre-existing floes. Often, due to the inhomogeneities of the floes involved, or the forcing that drives them together, some combination of these three patterns is observed in the field. The most destructive of these families of ice patterns is the pressure ridge in which the two ice floes break up as they collide thereby forming a “sail” and a “keel” of highly fractured ice blocks. Less destructive are the two types of rafting illustrated in figure 1: simple rafting and finger rafting. In simple rafting, one ice floe rides over the adjoining floe without the creation of a large amount of rubble. Finger rafting is similar to simple rafting in the sense that the two floes alternately ride over and under one another forming a series of interlocking fingers. Generically, these fingers have very sharp linear features that are particularly striking — as is the well-defined spacing of the fingers. For those interested in geophysical scale modelling of the interaction of sea ice with the atmosphere and the ocean, these deformation processes are particularly important. For example, the ridging and rafting of ice alters the albedo of the ice cover significantly (in rafting, the ice doubles in thickness and so appears much whiter than surrounding ice) and plays a major role in the mechanical redistribution of sea ice thickness [2]. Rothrock [15] also provides reasons for studying these deformation phenomena:
Understanding the Significance of Biochemistry in the Storage, Handling, Purification, and Sampling of Amphiphilic Mycolactone

Mycolactone, the amphiphilic macrolide toxin secreted by Mycobacterium ulcerans, plays a significant role in the pathology and manifestations of Buruli ulcer (BU). Consequently, it follows that the toxin is a suitable target for the development of diagnostics and therapeutics for this disease. Yet, several challenges have deterred such development. For one, the lipophilic nature of the toxin makes it difficult to handle and store and contributes to variability associated with laboratory experimentation and purification yields. In this manuscript, we have attempted to incorporate our understanding of the lipophilicity of mycolactone in order to define the optimal methods for the storage, handling, and purification of this toxin. We present a systematic correlation of variability associated with measurement techniques (thin-layer chromatography (TLC), mass spectrometry (MS), and UV-Vis spectrometry), storage conditions, choice of solvents, as well as the impact of each of these on toxin function as assessed by cellular cytotoxicity. We also compared natural mycolactone extracted from bacterial culture with synthesized toxins in laboratory (solvents, buffers) and physiologically relevant (serum) matrices. Our results point to the greater stability of mycolactone in organic, as well as detergent-containing, solvents, regardless of the container material (plastic, glass, or silanized tubes). They also highlight the presence of toxin in samples that may be undetectable by any one technique, suggesting that each detection approach captures different configurations of the molecule with varying specificity and sensitivity. Most importantly, our results demonstrate for the very first time that amphiphilic mycolactone associates with host lipoproteins in serum, and that this association will likely impact our ability to study, diagnose, and treat Buruli ulcers in patients.
Black Phosphorus Radio Frequency Electronics at Cryogenic Temperatures

Black phosphorus (BP) has great potential in high‐performance radio frequency electronics owing to its high carrier mobility and velocity. The electrical properties of black phosphorus experience rapid deterioration upon exposure to moisture and oxygen, which poses a challenge in the device fabrication, especially the deposition of gate dielectrics using conventional top‐gate approach. Herein, a Damascene‐like planarization process is presented to create an embedded gate stack with high‐κ dielectrics under a gate‐first approach, which minimizes surface impurities and traps at the black phosphorus/high‐κ interface and preserves the high‐quality black phosphorus channel. The radio frequency performances of this structure improve at least twice compared with conventional top‐gate structures. A record high extrinsic fmax of 17 GHz at room temperature for the device with 400 nm gate‐length is achieved, which further increases to around 31 GHz at 20 K. Finally, BP transistor‐based mixers operating at gigahertz frequency are also demonstrated for the first time.