Miracle-dz/UniFAR-FTUs huggingface dataset:
Additive Manufacturing and Casting Technology Comparison: Mechanical Properties, Productivity and Cost Benchmark

Abstract The casting technology is one of the oldest production technologies in the world but in the recent years metal additive manufacturing also known as metal 3D printing has been evolving with huge steps. Both technologies have capabilities to produce parts with internal holes and at first glance surface roughness is similar for both technologies, which means that for precise dimensions parts have to be machined in places where precise fit is necessary. Benchmark tests have been made to find out if parts which are produced with metal additive manufacturing can be used to replace parts which are produced with casting technology. Most of the comparative tests have been made with GJS-400-15 grade which is one of the most popular cast iron grades. To compare mechanical properties samples have been produced using additive manufacturing and tested for tensile strength, hardness, surface roughness and microstructure and then the results have been compared with the samples produced with casting technology. In addition, both technologies have been compared in terms of the production time and production costs to see if additive manufacturing is competitive with the casting technology. The original paper has been written in the Latvian language as part of the Master Thesis within the framework of the production technology study programme at Riga Technical University.
A COMPARATIVE STUDY OF SPRING TRITICALE VARIETIES IN THE WESTERN SIBERIAN FOREST-STEPPE ZONE UNDER DIFFERENT CONDITIONS OF VEGETATION

Spring triticale (x Triticosecale Wittmack) for Western Siberia is new and poorly studied culture. The objective of this study was to investigate the potential of spring triticale varieties and breeding lines and their adaptation to diferent conditions in Western Siberia. A ield experiment was conducted in Novosibirsk region, Russia in 2014. The experiment included seven spring triticale genotypes: the elite variety Ukro, three mutant forms of the facultative type of development (Sirs 57/2/4, Cecad 90/5, О.312/38) and three hybrids (Sirs 57/2/4 x Ukro, Ukro x K-3881, the complex hybrid winter wheat Filatovka x winter rye Korotko stebelnaya 69304 x Sirs 57/2/4). They were studied at two sowing rates (400 seeds per m 2 and 800 seeds per m 2 ) and on two sowing dates (15 May 2014 and 27 May 2014). The following attributes were measured: grain yield, number of ears, plant height, yield components (ear length, number of spikelets per ear, number of grains per ear, grains weight per ear) and yield quality (1 000-grain weight and test weight of one-liter grain volume). The three-factor analysis of variance revealed that sowing rate efect explained the major part of the total experimental variation in almost all of the traits, except 1 000-grain weight and test weight, the variation of which was determined predominantly by genotype efect. The highest grain productivity of varieties was obtained for the 15 May sowing date at the 400 seeds per m 2 sowing rate. The three mutant forms used in the experiment showed a lower level of adaptability in comparison with the variety Ukro.
Fluid inclusion study of shear zone hosted lode gold type deposits :

How to cite item Naranjo Sierra, E. , & Alvaran Echeverri, M. (2020). Fluid inclusion study of shear zone hosted lode gold type deposits: El Bagre mining district, Antioquia-Colombia. Earth Sciences Research Journal, 24(3), 245-257. DOI: https:// doi.org/10.15446/esrj.v24n3. 80653 The El Bagre mining district is located in the northeastern zone of the Antioquia department of Colombia, in the lower Cauca-Nechi river basin. The shear zone hosted lode-gold type deposits are located in the northern part of the El Bagre mining district. The characteristics of ore-forming fluids were investigated using fluid inclusion petrography and microthermometry analysis. Two stages, were identified in this study, namely a quartz-pyrite premineralization stage (1) and a reactivation-sulfide-telluride mineralization stage (2). Microthermometry analysis revealed the presence of two types of fluid inclusions. Primary aqueous-carbonic inclusions (type I) are trapped in massive quartz, are characterized by the presence of clathrate, with salinities between 1.5 and 8.3 wt% NaCl equiv. and homogenization temperatures (to liquid) between 238.1° and 297.1°C. Secondary aqueous saline inclusions (type II) are trapped in reactivated quartz (type IIA) and crosscutting calcite veins (type IIB). The salinity displays a positive correlation trend from low to relatively high salinity, with 3.82 wt% NaCl equiv. (type IIB) to 9.21 wt% NaCl equiv. (type IIA). Homogenization to a liquid phase occurred between 150.8° and 210.6°C for the type IIA inclusions and between 130.3° and 190.4°C for the type IIB inclusions. Based on these results, the shear zone hosted lode-gold type deposits from the El Bagre mining district, show characteristics of orogenic gold deposits. ABSTRACT Fluid inclusion study of shear zone hosted lode gold type deposits: El Bagre mining district, Antioquia-Colombia
Short-Term Photovoltaic Power Output Prediction Based on k-Fold Cross-Validation and an Ensemble Model

Short-term photovoltaic power forecasting is of great significance for improving the operation of power systems and increasing the penetration of photovoltaic power. To improve the accuracy of short-term photovoltaic power forecasting, an ensemble-model-based short-term photovoltaic power prediction method is proposed. Firstly, the quartile method is used to process raw data, and the Pearson coefficient method is utilized to assess multiple features affecting the short-term photovoltaic power output. Secondly, the structure of the ensemble model is constructed, and a k-fold cross-validation method is used to train the submodels. The prediction results of each submodel are merged. Finally, the validity of the proposed approach is verified using an actual data set from State Power Investment Corporation Limited. The simulation results show that the quartile method can find outliers which contributes to processing the raw data and improving the accuracy of the model. The k-fold cross-validation method can effectively improve the generalization ability of the model, and the ensemble model can achieve higher prediction accuracy than a single model.
Ultrashort-pulse laser machining of dielectric materials

There is a strong deviation from the usual τ1/2 scaling of laser damage fluence for pulses below 10 ps in dielectric materials. This behavior is a result of the transition from a thermally dominated damage mechanism to one dominated by plasma formation on a time scale too short for significant energy transfer to the lattice. This new mechanism of damage (material removal) is accompanied by a qualitative change in the morphology of the interaction site and essentially no collateral damage. High precision machining of all dielectrics (oxides, fluorides, explosives, teeth, glasses, ceramics, SiC, etc.) with no thermal shock or distortion of the remaining material by this mechanism is described.
Advertising, Market Share, And Profitability In The Greek Consumer Industry

An empirical investigation of the relationship between advertising to sales ratio, market share and firm profitability was carried out. Cross section analysis was used over 36 companies that produce fast moving consumer goods, for the year 2002. This paper finds that market share has a positive impact on firm profitability. In contrast to our expectation, the influence of market share is greater than that of advertising to sales ratio. To further examine the contribution of each explanatory variable after the other has been included in the model, the partial F-test was used. The obtained results verify the cross section analysis results.
Evaluation of the Residual Bagging Height using the Regression Technique and Fuzzy Theory

This paper deals with the evaluation of the residual bagging height using the fuzzy theory method. An experimental design was used to objectively evaluate the effect of input parameters on the residual bagging height of knitted fabrics using two different yarn structures without and within elastane filament. Our findings show that among the overall input pa rameters tested, two are influential. In our experimental design the fuzzy theory method was applied using five different membership functions: triangular-shaped, trapezoidal function, Gaussian, generalized-bell and Π-shaped . To prove our results, the experimental regression technique and fuzzy theory were compared. In addition, among the other membership functions tested, the triangular membership function gives a more effective evaluation and widely fits to residual bagging height behaviour.
A Potential Hypoxia Marker for PET

18F-labeled fluoroerythronitroimidazole (FETNIM) has been suggested as a marker of tumor hypoxia for use with PET. Our goal was to evaluate the pharmacokinetic properties of [18F]FETNIM in rats and analyze metabolites in human, dog, and rat plasma and urine. Metabolites in liver and tumor homogenates from tumorbearing rats, as well as the biodistribution of the tracer, were also studied. Methods: Radio–thin-layer chromatography and digital autoradiography were used to distinguish metabolites from the parent drug in urine and plasma from 8 patients, 3 dogs, and 18 rats, as well as in liver and tumor homogenates from SpragueDawley rats bearing 7,12-dimethylbenzanthracene–induced rat mammary carcinoma. Biodistribution of [18F]FETNIM was also studied in rats at 15, 30, 60, 120, and 240 min after tracer injection. Results: Most of the radioactivity in plasma and urine was the unchanged tracer, whereas rat liver homogenates contained almost only metabolites of [18F]FETNIM. None of the species studied showed binding of tracer to plasma proteins. A large variation— 3%–70%—in the radioactivity represented by unchanged [18F]FETNIM was found in rat tumor. A negative correlation was found between the percentage of radioactivity represented by unchanged [18F]FETNIM in tumor tissue and tumor uptake (percentage injected dose per gram of tissue) at later times. The highest radioactivity was seen in urine and kidney; the lowest uptake was in fat, cerebellum, and bone matrix. In contrast to matrix, bone marrow had high uptake of 18F. The tumor-to-blood ratio reached a maximum of 1.80 6 0.64 at 2 h. Conclusion: We conclude that [18F]FETNIM shows low peripheral metabolism, little defluorination, and possible metabolic trapping in hypoxic tumor tissue. These suggest a potential use for this tracer in PET studies on hypoxia of cancer patients.
Anthropogenic impact in the Maya Lowlands of Petén, Guatemala, during the last 5500 years

Trace and rare earth elements from a sediment core from Lake Petén Itzá (Guatemala) depict the geochemical dynamics affecting the lake from ∼5500 a BP to the present. This timing encompasses the Preclassic (4000–1700 a BP) and Classic Periods (1700−1000 a BP) when thriving Maya societies extensively cleared land for agriculture. We demonstrate that this land use occurred during times of increased precipitation, where both processes resulted in increased erosion. Rare earth element ratios depict high precipitation rates between 3000 and 1000 a BP, correlating with an increase in allochthonous silicate input and low organic carbon in the ‘Maya Clay’ stratigraphic section, where this layer is ascribed to intensive anthropogenic land use. Cesium anomalies provide additional evidence for runoff due to high rainfalls and amplified by anthropogenic impacts. The Petén Itzá core contains anomalous spikes of arsenic and mercury, and these peaks correspond to documented volcanic eruptions and therefore are probably natural. The geochemical composition of sediments and palynological records indicate re‐growth of the forest after ∼900 a BP. This increased forest vegetation coincides with the timing of the decline in Maya agriculture.
The assignment of dissociative electron attachment bands in compounds containing hydroxyl and amino groups

Dissociative electron attachment (DEA) spectra were recorded for methanol, phenol, diethylamine, tetramethylhydrazine, piperazine, pyrrole and N,N-dimethylaniline. Comparison with He I photoelectron spectra permitted the assignment of virtually all DEA bands in the saturated compounds to core excited Feshbach resonances with double occupation of Rydberg-like orbitals and various Koopmans' states of the positive ion as a core. These resonances shift to lower energies with alkyl substitution, in contrast to the shape resonances, and are found at surprisingly low energies in the amines. The DEA spectra in the unsaturated compounds show no or only weak evidence for the Rydberg-type Feshbach resonances. It is proposed that DEA in saturated polyatomic molecules containing hydroxyl and amino groups is in general dominated by this type of resonance.
EPIDURAL ANALGESIA IN LAPAROSCOPIC RADICAL PROSTATECTOMY ANALGESIA EPIDURAL EN LA PROSTATECTOMÍA RADICAL LAPAROSCÓPICA

Introduction: Epidural analgesia is an effective technique for postoperative pain relief. Our aim in this retrospective study was to assess the postoperative pain control and complications relating to epidural technique in laparoscopic radical prostatectomy (LRP). Material and methods: A retrospective analysis of 193 patients who underwent LRP, in which epidural analgesia was the postoperative pain approach, was performed. The procedure is generally performed under combined anesthesia. Data collected was postoperative pain data; appearance of neurological disorders (Bromage scale was used for motor weakness assessment); data related to the epidural technique and possible difficulties when performing it; data on epidural infusion; catheter-related complications; hospital stay, postoperative complications, and outcome. Results: Firstly, average VAS at rest was 1.2 ± 1.6; and upon movement, average VAS was 1.9 ± 1.8 during the hospital stay. Secondly, complications related to epidural technique appeared in 37 % of patients. There were 3 cases of hematic puncture; 3 accidental catheter disconnections; 1 dural puncture, and 1 subdural block. As for neurological secondary effects of local anesthetics in the epidural technique, 56 patients (30.1 %) presented with motor block of one or both lower extremities after surgery, and 5 (2.7 %) with paresthesia. Statistical analysis showed that motor weakness was not related to age, weight, type of local anesthetic used, infusion rate, level of epidural puncture nor length of catheter within the epidural space (p > 0.05). Conclusion: Postoperative epidural analgesia offers excellent analgesic quality but it can be associated with several complications secondary to the use of local anesthetics, which could disagree with the terms of Fast-track surgery. New techniques like the TAP block could offer the same analgesic quality, without the epidural ́s technique potential complications.
a'J'O MONITORING OF SURFACE DEFORMATION AND MICROSEISMICITY APPLIED TO RADIOACTIVE WASTE DISPOSAL THROUGH HYDRAULIC /RACTURING AT OAK RIDGE NATIONAL LABORATORY*

Low-level liquid nuclear wastes are disposed of at Oak Ridge National Laboratory by the hydrofracture process. Wastes are mixed with cement and other additives to form a slurry that is injected into shale of low permeability at 300 m depth. The slurry spreads radially along bedding plane fractures before setting as a grout. Oifferent methods for monitoring the location and behavior of the fractures have been investigated. Radioactive grout sheets can be located by gamma-ray logging of cased observation wells. Two other methods are based on the fact that the ground surface is deformed by the injection. The first entails surface leveling of a series of benchmarks; uplift up to 2.5 cm occurs. The second method involves use of tiltmeters that are sensitive and measure ground deformation in real time during an injection. Both methods show subsidence during the weeks following an injection. Interpretive models for the tiltmeter data are based on the elastic response of isotropic and anisotropic media to the inflation of a fluid-filled fracture. A fourth monitoring method is based on microseismicity. Geophone arrays were used to characterize the fracture process and to provide initial assessment of the feasibility of using seismic measurements to map the fractures as they form. An evaluation of each method is presented.
Foliar Application of Thidiazuron , Potassium Chloride and Boron with Early Cultivation Date Elevated Growth and Productivity of Hybrid Corn Grown Under Adverse Conditions

Two Field experiments were conducted under newly reclaimed saline area at Experimental Station of Desert Research Center, Sahll El-Tina, North Sinai governorate, Egypt, soil salinity reached 3500 ppm. during two successive summer seasons of 2013 and 2014. The main objective was to study the effect of four different foliar application treatments i.e., Thidiazuron (TDZ) at 2 ppb, KCl at 2%, Boron at 0.02% and tap water as a control with two cultivation dates (1 of April and the 1 of May) on growth traits, yield, yield components and physiological traits as well as chemical compositions of Maize hybrid 352. Split plot design with three replications was used. Early cultivation date (April 1) was better than late date (May1) for all growth traits, yield and its componants, physiological traits as well as chemical compositions of maize plant under saline soil during 2013 and 2014. TDZ at 2 ppb as foliar application produced the highest significant mean values for all growth traits, yield and its componants and physiological traits as well as chemical compositions of corn. Physiological parameters in term of chlorophyll content, TSS%, potassium content, total carbohydrate and protein % were segnificanty increased by foliar application of TDZ at 2 ppb while proline cntent and transpiration rate were decreased.
DNA methylation of selected metallothionein genes for RCC. Based on the initial analysis of kidney renal clear cell carcinoma dataset from The Cancer Genome Atlas, genes

Metallothioneins are low-weight cysteine-rich proteins responsible for metal ion homeostasis in a cell and, thus, capable of regulating cell proliferation and differentiation. Deregulation of metallothionein genes has been reported in various human tumors. However, their role in renal cell carcinoma (RCC) has been poorly investigated. In the present study, we aimed to evaluate the importance of promoter DNA methylation of selected metallothionein genes for RCC. Based on the initial analysis of kidney renal clear cell carcinoma dataset from The Cancer Genome Atlas, genes MT1E, MT1F, MT1G and MT1M were selected for qualitative methylation analysis in 30 tumors (including 10 multifocal cases), 10 pericancerous, and 30 non-cancerous renal tissues (NRT). Methylation of MT1E and MT1M was tumor‐specific (P=0.0056 and P=0.0486, respectively) and showed moderate interfocal variation in paired tumor foci. Methylated promoter status of the two genes was associated with larger tumor size (P=0.0110 and P=0.0156, respectively). Furthermore, aberrant MT1E methylation was more frequent in tumors having necrotic zones (P=0.0449) or characterized with higher differentiation grade (P=0.0144), while MT1M was more commonly methylated in tumors with higher Fuhrman grade (P=0.0272). Only unmethylated MT1F promoter status was observed in all analyzed samples. Gene expression analysis (51 RCC and 9 NRT) revealed MT1G downregulation in tumors (P<0.0001), while lower MT1E expression levels were associated with the promoter methylation (P=0.0077). In clear cell RCC, MT1E, MT1G and MT1M expression was higher than that noted in other histological tumor subtypes (all P<0.0500). In addition, some associations were observed between metabolic syndrome-related clinical parameters and promoter methylation or gene expression. In conclusion, the present study revealed the potential role of MT1E and MT1M promoter methylation in RCC development.
Suppression of interdiffusion in InGaAs/GaAs quantum dots using dielectric layer of titanium dioxide

In this work, titanium dioxide (TiO2) film was deposited onto the In0.5Ga0. 5As/GaAs quantum-dot structure by electron-beam evaporation to investigate its effect on interdiffusion. A large redshifted and broadened spectrum from the dot emission was observed compared with that from the uncapped (but annealed) reference sample, indicating the suppression of thermal interdiffusion due to TiO2 deposition. The structure was also capped with a silicon dioxide (SiO2) single layer or SiO2/TiO2 bilayer with the thickness of SiO2 varied from ∼6 to ∼145 nm. In the former case, an increased amount of impurity-free vacancy disordering (IFVD) was introduced with the increase of SiO2 thickness due to the enhanced Ga outdiffusion into the film. With TiO2 deposited on top, IFVD and thermal interdiffusion were suppressed to different extents with the variation of SiO2 thickness. To explain the suppression of interdiffusion, thermal stress introduced by the large thermal expansion coefficient of TiO2 (when compared with GaAs.
Aalborg Universitet Global longitudinal strain corrected by RR interval is a superior predictor of all-cause mortality in patients with systolic heart failure and atrial fibrillation

Aims Quantification of systolic function in patients with atrial fibrillation (AF) is challenging. A novel approach, based on RR interval correction, to counteract the varying heart cycle lengths in AF has recently been proposed. Whether this method is superior in patients with systolic heart failure (HFrEF) with AF remains unknown. This study investigates the prognostic value of RR interval-corrected peak global longitudinal strain {GLSc = GLS/[RR^(1/2)]} in relation to all-cause mortality in HFrEF patients displaying AF during echocardiographic examination. Methods and results Echocardiograms from 151 patients with HFrEF and AF during examination were analysed offline. Peak global longitudinal strain (GLS) was averaged from 18 myocardial segments obtained from three apical views. GLS was indexed with the square root of the RR interval {GLSc = GLS/[RR^(1/2)]}. Endpoint was all-cause mortality. During a median follow-up of 2.7 years, 40 patients (26.5%) died. Neither uncorrected GLS (P = 0.056) nor left ventricular ejection fraction (P = 0.053) was significantly associated with all-cause mortality. After RR^(1/2) indexation, GLSc became a significant predictor of all-cause mortality (hazard ratio 1.16, 95% confidence interval 1.02–1.22, P = 0.014, per %/s^(1/2) decrease). GLSc remained an independent predictor of mortality after multivariable adjustment (age, sex, mean heart rate, mean arterial blood pressure, left atrial volume index, and E/e0) (hazard ratio 1.17, 95% confidence interval 1.05–1.31, P = 0.005 per %/s^(1/2) decrease). Conclusions Decreasing {GLSc = GLS/[RR^(1/2)]}, but not uncorrected GLS nor left ventricular ejection fraction, was significantly associated with increased risk of all-cause mortality in HFrEF patients with AF and remained an independent predictor after multivariable adjustment.