Expert System to Manage the Safety Requirements for Concrete Works Related to Jordanian Construction Projects

Numerous investigations that had been conducted in Jordan to evaluate the safety management in carrying out construction projects revealed that the implementation of this item is relatively below the desired level. In this research, a specialized software (Expert System) was proposed to improve the current situation regarding the application of the right rules in safety management for concrete works related to Jordanian construction projects. The proposed system contains a lot of ideal terms, specifications, and standards for conducting an acceptable safety management and for getting rid of (or reducing) accidents and other types of risks inside the project site. As a conclusion derived from this research, Expert System is aimed at enhancing the existing situation regarding the safety management for construction projects, and therefore to keep the workers and other staff to be away from all kinds of public risks inside the construction project, and accordingly the proposed software is recommended to be adopted in following up the application of safety management procedures in construction sites. Keywords: Safety Management, Concrete Works, Expert System, Construction Projects, Safety Requirement

IWCD-PROPOSED IMAGE COMPRESSION METHOD BASED ON INTEGER WAVELET AND DCT

This paper describes a new lossy image compression decompression algorithm. In lossy compression techniques there are some loss of information, and image cannot be reconstructed exactly.This algorithm will be referred to as (IWDC), which stands for integer wavelet (IWT) and discrete cosine transform (DCT) and this algorithm improves existing techniques and develops new image compressors.(IWDC) is efficient than corresponding DCT and wavelet transform functions and incorporating DCT and integer wavelet transform are shown to improve the performance of the DCT and integer wavelet (IWT). In the new proposed compression is more efficient than the still image compression methods

Synthesis and Antibacterial Activity of Isatin Schiff Base Derivative with 3-Aminoacetophenone and its Ni(II), Co(II) Transition Metals Complexes

The (E)-3-(3-acetylphenylimino) indolin-2-one (Bidentate) ligand type [HL], has been prepared from Isatin and 3-aminoacetophenone in the presence of KOH. In general, the ligand contains oxygen (O) and nitrogen (N) donor atoms. The reaction of Isatin and 3-aminoacetophenon was carried out in ethanol by condensation reaction at 80°C with reflux for 4 h, to form [HL] ligand type. This ligand has been used to prepare NiII and CoII complexes in the ratio of 1:1 metal-ligand. All compounds have been characterized by spectroscopic methods (Fourier transform infrared and ultravioletvisible), C.H.N, thin-layer chromatography, mass spectrum, X-ray diffraction, magnetic moment, conductivity measurements and milting point, the synthesized ligand and its metal complexes have been tested for their antibacterial activity against Staphylococcus aureus and Bacillus subtilis using agar disc diffusion method. The ligand and its complexes showed significant activities against S. aureus and B. subtilis. Our study revealed the formation of four coordinate square planar complexes around NiII and CoII metal ions

Synthesis and Characterization of Iron(II), Cobalt(II), Nickel(II), Copper(II), and Zinc(II) Complexes Using Diphenylmethyl Xanthate Ligand

Potassium Diphenylmethyl Xanthate and its monomeric complexes were synthesized at room temperature under inert gas and stirring condition. The ligand and its complexes of the general formula [M(L)2] (where M= FeII, CoII, NiII , CuII, ZnII and CdII) were characterized by spectroscopic methods (IR, UV-Vis, 1H-, 13C-, DEPT-, HQMC- and COSY-NMR), elemental analysis, metal content, magnetic susceptibility  measurement and molar conductance. These studies revealed the formation of four coordinate complexes

ADHESION OF UROPATHOGENIC AND ENTEROPATHOGENIC Escherichia coli TO HUMAN BUCCAL EPITHELIAL CELLS

Fifty urine samples were collected from patients with urinary tract infections and a 50 stool specimens from diarrhoeal patients . These samples were investigated bacteriologically. The invitro adherence test of Enteropathogenic and Uropathogenic E. coli to healthy human buccal epithelial cells was carried out. The results show no significant differences in the mean adhesion of these bacteria (two sources) on the epithelial cells as compard with the control . but there is a little variation among EPEC isolates and among UPEC isolates too as compared with the control

Enhancement of the Tensile and the Compression Properties for Heat- Cured Acrylic Resin Denture Base Materials

This work aims to investigate the tensile and compression strengths of heat- cured acrylic resin denture base material by adding styrene-butadiene (S- B) to polymethyl methacrylate (PMMA). The most well- known issue in prosthodontic practice is fracture of a denture base. All samples were a blend of (90%, 80%) PMMA and (10%, 20%) S- B powder melted in Oxolane (Tetra hydro furan). These samples were chopped down into specimens of dimensions 100x10x2.5mm to carry out the requirements of tensile tests. The compression strength test specimens were shaped into a cylinder with dimensions of 12.7mm in diameter and 20mm in length. The experimental results show a significant increase in both tensile and compression strengths when compared to control (standard) results for the preparation material

Semi-Active Adaptive Control of Coupled Structures for Seismic Hazard Mitigation

The research presented in this dissertation examines innovative structures connected with smart control devices driven by adaptive control methods. The research focuses on understanding the dynamics of coupled structures and evaluating the merits of adaptive control in enhancing the seismic performance of these structures and dealing with uncertainties. Coupled structures is recognized as an effective strategy to protect civil structures from seismic excitations. Coupling of adjacent structures has proved to offer functional benefits such as the potential for shifting the buildings’ natural frequencies, likely leading to a reduction in the natural period of vibration. Structural performance is further enhanced by implementing energy-dissipative devices to connect adjacent buildings to minimize the seismic structural responses. One of the main challenges to control civil structures is the high uncertainty involved throughout their lifetimes. Adaptive control promises to deal with changes in structures’ characteristics, such as seismic-induced damage. The simple adaptive control method, which is a reference-model following scheme, is used in the current research to improve the seismic behavior of adjacent buildings connected by structural links where control devices are implemented. The philosophy of the simple adaptive control method is that an actual system (often called plant) can be forced to track the behavior of pre-determined trajectories through adjustable adaptive gains. The effectiveness of the simple adaptive controller in reducing the seismic responses is compared with other adaptive and non-adaptive control methods. The results reveal that the simple adaptive controller is effective in alleviating the structural responses and dealing with uncertainties of coupled structures with both linear and nonlinear behavior. The results also show that the coupling strategy is viable for reducing the structural responses under seismic excitations

Synthesis and characterization of benzil crown cyclic Schiff base ligand and its metal complexes

ABSTRACT. The reaction between benzil and hexamethylenediamine formed a new ligand [L], [(1Z,3Z)-2,3-diphenyl-5,6,7,8,9,10-hexahydro-1,4-diazecine], of the type [N2], was synthesized by the condensation reaction through Schiff base reaction between benzil and hexamethylenediamine. The new Schiff base ligand reacts with Mnп, Niп and Coп metal ions to give the complexes with the general formula: [M(L)Cl2]. The elemental investigations have been used to analyze the ligand and its complexes by CHN, FT-IR, UV-Vis, TLC, mass spectrum, melting point with the study of biological activity to the formed compounds. From the data obtained, the proposed molecular structure adopts square planar structure about the metal ions. The study reveals the formation of a new ligand type [N2] and it's metal ion complexes with square planar structures metal:ligand ratio of 1:1, which can be employed in a variety of fields such as medicine and industry.     KEY WORDS: Benzil, Hexamethylenediamine, Metal complexes, Square planar structure   Bull. Chem. Soc. Ethiop. 2022, 36(4), 791-799.                                                                DOI: https://dx.doi.org/10.4314/bcse.v36i4.6                                                       &nbsp

Synthesis and Characterization of Sodium Diphenylcarbamodithioate Ligand [L] and its Cobalt, Nickel, and Copper Complexes

A correlation of the infrared spectra of thiocarbonyl derivatives based on the literature data has been carried out. Assignments have also been made in some new systems. Sodium Diphenylcarbamodithioate ligand and its monomeric complexes were synthesized at room temperature and stirring condition. The ligand and its complexes of the general formula [M(L)2] (where M= Co+2, Ni+2  and Cu+2) were characterized by spectroscopic methods (IR and ultraviolet-visible), elemental analysis (C.H.N. and S) metal content, magnetic susceptibility measurement, and biological activity (an antibacterial activity of the complex was studied by agar disc diffusion method and minimum inhibitory concentration strain against Staphylococcus aureus and Bacillus subtilis). The complex exhibited significant activities against S. aureus and B. subtilis, thin-layer chromatography, mass spectrometry, X-ray powder diffraction, and molar conductance. Our study revealed the formation of four-coordinate square planar complexes around Coп, Niп, and Cuп metal ions