Surgical Decompressive Hemicraniectomy for a Massive Hemispheric Ischemic Stroke: A Case Report and an Update

Abstract: The significant space-occupying effect resulting from a complete middle cerebral artery (MCA) infarction leads to a dramatic increase in intracranial pressure, and impairment of level of consciousness ending in coma and brain death within few days in almost 80% of patients treated with medical therapy alone. Survivors are severely disabled with poor quality of life. Decompressive surgery is back on stage as a means of dropping the massive increase in intracranial pressure, and is gaining a momentum after the rekindled interest in this old procedure over the last few years. I am reporting here a patient who had a massive middle cerebral artery ischemic stroke that underwent decompressive hemicraniectomy followed by a review of recent updates

CRIME RATE PREDICTION USING THE RANDOM FOREST ALGORITHM

  An act that creates crimes punishable by law is characterized as a crime. Rape, fraud, terrorism, kidnapping, burglary, murder, and other crimes are common in Nigeria. Examples are cybercrime, bribery and corruption, robbery, money laundering, among other crimes. Crime is a harmful and widespread social issue that affects individuals all around the world. The rate of crime has risen dramatically in recent years. To cut down on crime, at any rate, law enforcements must take preventative actions. To protect society against crime, modern systems and new technologies are required. Although accurate real-time crime study is on aid in reducing crime rates, they are nonetheless useless. As crime occurrences are dependent on, this is a difficult subject for the scientific community to solve. Therefore, this paper proposes machine learning algorithm to indicate the frequency and pattern of crimes based on the data collected and to show the extent of crime in a particular region. Various visualization approaches and machine learning algorithms are used in this study to anticipate the crime distribution over a large area. In the first stage, raw datasets were processed and visualized according to the requirements. Then, to extract knowledge from these massive datasets, machine learning methods were deployed and uncover hidden patterns in the data, which were then utilized to investigate and report on crime patterns, It is beneficial to crime analysts. Investigate these crime networks using a variety of interactive crime visualizations. As a result, it is helpful in crime prevention

ATTENUATION CHARACTERISTICS OF SAUDI ARABIAN RESERVOIR SANDSTONE AND LIMESTONE CORES

INTRODUCTION Lithology, porosity, permeability, pore fluids, and effective pressure are some of the important criteria for reservoir characterization. These parameters significantly affect the seismic signature of a reservoir. Thus, establishing correlations between seismic properties on one hand, and lithology, porosity, permeability, and stress on the other, will increase the reliability of reservoir property predictions from seismic measurements. Another advantage of seismic attributes is that they are much easier to measure in-situ than the above mentioned reservoir properties, and since such measurements are noninvasive, an observed correlation between them could also prove useful as an important exploration tool for oil and gas reservoirs. In recent years, with the improvement in borehole sonic sources and receivers, full waveforms are being recorded and processed at the rig site itself. Enough expertise is gained to accurately compute the attenuation quality factors from the full waveforms recorded in the laboratory and borehole sonics. In this paper attenuation quality factors of several Saudi Arabian reservoir sandstone and limestone cores are computed and possible correlation between quality factors and reservoir properties like porosity, permeability, velocities, and wetting state are studied. OBJECTIVE The objective of this paper is to study the pressure dependent behavior of quality factor and to discuss the possible correlation of the seismic attributes like attenuation to the more relevant reservoir characterization properties like porosity, permeability, velocity, and saturation. It has been observed that quality factor Q does not have a good correlation with either porosity or permeability LABORATORY MEASUREMENTS A total of twenty sandstone and limestone reservoir cores have been tested for porosity, permeability, P-and S-wave velocities and quality factors under dry and water saturated conditions. The dried cores were flushed with air, therefore in effect, dry core samples are air saturated dry rocks. Nine simultaneous P-and S-wave measurements were made in the pressure range of 0 -82 MPa. The dry and water saturated P-and S-wave velocities and quality factors were measured on the same core sample. First the measurements on dry core were completed, the core sample was then fully saturated with water and then the Pand S-wave velocities and quality factors were measured on the water saturated core back to contents SCA 2001-57 2 sample under the same confining pressure conditions. Simultaneous Porosity and Permeability measurements in the same pressure range were made on a different sister sample from the same depth. The full wave broadband ultrasonic waves used in this study had a central frequency of 700 KHz. The attenuation quality factors were calculated using spectral ratio method (Toksoz et al., 1979). Correction for diffraction loss due to the finite size of the transducer and the non-planar wavefronts (Papadakis, 1968) were applied using tabulated data of To validate the calculation and diffraction correction procedure for the quality factors, Q, some experiments were performed on French Gres' des Vesges sandstone samples and the results were compared to those available in the literature RESULTS AND DISCUSSION Several investigators In SCA 2001-57 3 CONCLUSIONS • A new parameter, the ratio of P-wave to S-wave quality factors Qp/Qs gives a good correlation to porosity and permeability. • The results presented in this paper confirm the previously published results in literature. • In most of the studies reported in literature, outcrop rocks with emphasis on sandstone were used. Whereas in this paper sandstone and limestone reservoir cores are used. Therefore correlations developed using outcrop samples give a good estimate of reservoir rock properties

Effect of Au Precursor and Support on the Catalytic Activity of the Nano-Au-Catalysts for Propane Complete Oxidation

Catalytic activity of nano-Au-catalyst(s) for the complete propane oxidation was investigated. The results showed that the nature of both Au precursor and support strongly influences catalytic activity of the Au-catalyst(s) for the propane oxidation. Oxidation state, size, and dispersion of Au nanoparticles in the Au-catalysts, surface area, crystallinity, phase structure, and redox property of the support are the key aspects for the complete propane oxidation. Among the studied Au-catalysts, the AuHAuCl4-Ce catalyst is found to be the most active catalyst

Synthesis of conductive carbon aerogels decorated with β-tricalcium phosphate nanocrystallites

There has been substantial interest in research aimed at conductive carbon-based supports since the discovery that the electrical stimulus can have dramatic effect on cell behavior. Among these carbon-aerogels decorated with biocompatible polymers were suggested as future materials for tissue engineering. However, high reaction temperatures required for the synthesis of the aerogels tend to impair the stability of the polymeric networks. Herein, we report a synthetic route towards carbon-aerogel scaffolds decorated with biocompatible ceramic nanoparticles of tricalcium phosphate. The composites can be prepared at temperature as high as 1100 °C without significant effect on the morphology of the composite which is comparable with the original aerogel framework. Although the conductivity of the composites tends to decrease with the increasing ceramic content the measured conductivity values are similar to those previously reported on polymer-functionalized carbon-aerogels. The cell culture study revealed that the developed constructs support cell proliferation and provide good cell attachment suggesting them as potentially good candidates for tissue-engineering applications

Design of Frequency Reconfigurable Multiband Compact Antenna using two PIN diodes for WLAN/WiMAX Applications

YesIn this paper, we present a simple reconfigurable multiband antenna with two PIN diode switches for WiMAX/WLAN applications. The antenna permits reconfigurable switching in up to ten frequency bands between 2.2 GHz and 6 GHz, with relative impedance bandwidths of around 2.5% and 8%. The proposed antenna has been simulated using CST microwave studio software and fabricated on an FR-4 substrate. It is compact, with an area of 50 × 45 mm2, and has a slotted ground substrate. Both measured and simulated return loss characteristics of the optimized antenna show that it satisfies the requirement of 2.4/5.8 GHz WLAN and 3.5 GHz WiMAX antenna applications. Moreover, there is good agreement between the measured and simulated result in terms of radiation pattern and gain.Engineering and Physical Science Research Council through Grant EP/E022936A

The Design of a Uniplanar Printed Triple Band-Rejected UWB Antenna using Particle Swarm Optimization and the Firefly Algorithm

YesA compact planar monopole antenna is proposed for ultra-wideband applications. The antenna has a microstrip line feed and band-rejected characteristics and consists of a ring patch and partial ground plane with a defective ground structure of rectangular shape. An annular strip is etched above the radiating element and two slots, one C-shaped and one arc-shaped, are embedded in the radiating patch. The proposed antenna has been optimized using bio-inspired algorithms, namely Particle Swarm Optimization and the Firefly Algorithm, based on a new software algorithm (Antenna Optimizer). Multi-objective optimization achieves rejection bands at 3.3 to 3.7 GHz for WiMAX, 5.15 to 5.825 GHz for the 802.11a WLAN system or HIPERLAN/2, and 7.25 to 7.745 GHz for C-band satellite communication systems. Validated results show wideband performance from 2.7 to 10.6 GHz with S11 ˂ -10 dB. The antenna has compact dimensions of 28 × 30 mm2. The radiation pattern is comparatively stable across the operating band with a relatively stable gain except in the notched bands.This work was supported in part by the United Kingdom Engineering and Physical Science Research Council (EPSRC) under Grant EP/E022936A, TSB UK under grant application KTP008734 and the Iraqi Ministry of Higher Education and Scientific Research

Experimental investigation on the post-fire performance of reactive powder concrete columns

The increased use of reactive powder concrete (RPC) in concrete structures has attracted attention towards the structural behavior of RPC in fires. This work examines experimentally the performance of RPC and NSC columns subjected to 25% of the ultimate load and exposed to direct fire flame for a period of 30 and 60 min at various temperature levels. The paper aims to evaluate the maximum temperature level and fire duration that can be withstood by this type of concrete columns. The results show that the failure mode of RPC columns without reinforcement is a sudden shear failure, whereas the failure mode of reinforced RPC columns is a crushing failure with rupture of certain ties. The RPC columns at high temperatures spall intensively; additionally, the ultimate strength clearly decreases compared to the NSC columns at the same conditions

Adult Normal Value and Deficiency Percentage of Serum Zinc in both Sexes Iraqi Healthy Population, using Atomic Absorption spectrophotometer (AAS)

The essential trace elements were very significant for the life of humans, and the imbalance in blood serum lead to so serious diseases. In this study, zinc (Zn) has been measured in the serum of  2005 samples (1305 male and 700 female) apparently healthy Iraqi persons aged 20-70 years using a flame atomic absorption spectrophotometer (FAAS). The mean concentration of Zn was (0.96 – 1.12 mg ml-1) in males and slightly lower (0.8 – 1.02 mg ml-1) in females. The concentration of Zinc was slightly increased by age, especially in the groups of 31-40 years, and slightly reduced in the group of 51-61 years. The concentration of zinc in all groups of the study seems to be stable. The study showed that there is a deficiency in Zn value (Zn concentration below 0.5 mg ml-1) in the male and females healthy populations by 22.9% and 18.85%, respectively

Antimicrobial Studies of Aqueous Extract of the Leaves of Lophira Lanceolata

ABSTRACT The antimicrobial activity of aqueous extract of the leaves of Lophira lanceolata was tested on Aspergillus niger, Bacillus subtilis, Candida albicans, Escherichia coli, Pseudomonas aeruginosa, Selaginella selaginoides, Shigella dysenteriae, Staphylococcus aureus, and Streptococcus pyogens. The micro organisms were chosen because they are associated with dysentery, diarrhoea , skin infection, especially burn sites, wounds, pressure, sores and ulcer, The In vitro-antimicrobial assay recorded the zones of inhibition of bacterial and fungal growths. Extracts with inhibition zones greater than (>10mm), were considered active The (MBC) of the aqueous extract showed considerable inhibition of the micro-organisms at higher doses. While the extract inhibited Escherichia coli and Streptococcus pyogens, at 800 mg/kg, the extracts are active at 1000 mg/kg. From the result of the MIC it was observed that the leaves aqueous extract shows comparable minimum inhibitory concentration on all the micro organisms with growth of Escherichia coli, Streptococcus aureus, Streptococcus Pyogens and Selaginella selaginoides Pseudomonas aeruginosa at 6.25mg/ml while for, Bacillus subtilis, Aspergillus niger, Shigella dysenteriae and Candida albicans showing at 12.5 mg/ml The leaves aqueoues extract shows comparable MBC to Tetracycline and Ciprofloxacin, for organisms with 3.125 mg/ml for Shigella dysenteriae, Bacillus subtilis, 6.25mg/ml for Candida albicans, Aspergillus niger while showing 12.5 mg/ml for Escherichia coli, Staphylococcus, Pseudomonas aeruginosa, Streptococcus pyogens and Selaginella selaginoides. This is being reported in this plant for the first time