Utilization of Recycled Construction and Demolition Waste in the Manufacture of Prefabricated Wall Claddings to Achieve Sustainability

The climate of Egypt is characterized by high temperatures. Clay bricks, the most common type of building bricks in Egypt, are one of the main reasons for increasing the heat gain of buildings. The absence of suitable environmental alternatives for clay bricks calls for an attempt to find and evaluate effective alternatives.This research aims to manufacture wall claddings that meet the environmental requirements and thermal comfort needs of buildings in Egypt through recycling construction and demolition waste (CDW). Multiple proposals featuring different mixtures of cement, sand, water and CDW (crushed concrete and crushed bricks) were tested to determine the most suitable mixture in terms of thermal insulation. After comparing the results of each proposal, the best performing samples were further tested and applied to clay bricks to assess their performance and effectiveness in achieving thermal comfort. These tests yielded promising results, as the best performing wall claddings succeeded in reducing heat gain by up to 86%. Results revealed that the application of CDW wall claddings could significantly reduce the energy consumed for cooling and air conditioning. Furthermore, wall claddings have a relative environmental advantage over clay bricks commonly used in residential buildings in Egypt as they represent a safe way to dispose of construction and demolition waste that is normally disposed of in harmful ways with a negative impact on the environment. The researchers recommend examining different materials and alternatives that can be manufactured from construction and demolition waste, as the available capabilities remain numerous and not sufficiently researched

Utilization of Recycled Construction and Demolition Waste in the Manufacture of Prefabricated Wall Claddings to Achieve Sustainability

The climate of Egypt is characterized by high temperatures. Clay bricks, the most common type of building bricks in Egypt, are one of the main reasons for increasing the heat gain of buildings. The absence of suitable environmental alternatives for clay bricks calls for an attempt to find and evaluate effective alternatives.This research aims to manufacture wall claddings that meet the environmental requirements and thermal comfort needs of buildings in Egypt through recycling construction and demolition waste (CDW). Multiple proposals featuring different mixtures of cement, sand, water and CDW (crushed concrete and crushed bricks) were tested to determine the most suitable mixture in terms of thermal insulation. After comparing the results of each proposal, the best performing samples were further tested and applied to clay bricks to assess their performance and effectiveness in achieving thermal comfort. These tests yielded promising results, as the best performing wall claddings succeeded in reducing heat gain by up to 86%. Results revealed that the application of CDW wall claddings could significantly reduce the energy consumed for cooling and air conditioning. Furthermore, wall claddings have a relative environmental advantage over clay bricks commonly used in residential buildings in Egypt as they represent a safe way to dispose of construction and demolition waste that is normally disposed of in harmful ways with a negative impact on the environment. The researchers recommend examining different materials and alternatives that can be manufactured from construction and demolition waste, as the available capabilities remain numerous and not sufficiently researched

Scaling Machine Learning Data Repair Systems for Sparse Datasets

Machine learning data repair systems (e.g. HoloClean) have achieved state-of-the-art performance for the data repair problem on many datasets. However, these systems face significant challenges with sparse datasets. In this work, the challenges presented by such datasets to machine learning data repair systems are investigated. Dataset-independent methods are presented to mitigate the effects of data sparseness. Finally, experimental results are validated on a large, sparse real-world dataset: Census. Showing that the problem size can be reduced by more than 70%, saving significant computational costs, while still getting high accuracy data repairs (94.5% accuracy)

Kinetic Spectrophotometric Determination of Certain Cephalosporins in Pharmaceutical Formulations

A simple, reliable, and sensitive kinetic spectrophotometric method was developed for determination of eight cephalosporin antibiotics, namely, Cefotaxime sodium, Cephapirin sodium, Cephradine dihydrate, Cephalexin monohydrate, Ceftazidime pentahydrate, Cefazoline sodium, Ceftriaxone sodium, and Cefuroxime sodium. The method depends on oxidation of each of studied drugs with alkaline potassium permanganate. The reaction is followed spectrophotometrically by measuring the rate of change of absorbance at 610 nm. The initial rate and fixed time (at 3 minutes) methods are utilized for construction of calibration graphs to determine the concentration of the studied drugs. The calibration graphs are linear in the concentration ranges 5–15 μg mL−1 and 5–25 μg mL−1 using the initial rate and fixed time methods, respectively. The results are validated statistically and checked through recovery studies. The method has been successfully applied for the determination of the studied cephalosporins in commercial dosage forms. Statistical comparisons of the results with the reference methods show the excellent agreement and indicate no significant difference in accuracy and precision

Enhancement of On-grid PV System under Irradiance and Temperature Variations Using New Optimized Adaptive Controller

Solar Energy is one of the key solutions to future electrical power generation. Photovoltaic Plants (PV) are fast growing to satisfy electrical power demand. Different maximum power point tracking techniques (MPPT) are used to maximize PV systems generated power. In this paper, on grid PV system model in MATLAB SIMULINK is tested under sudden irradiance and cell temperature variations. Incremental Conductance MPPT is used to maximize generated power from the PV system with the help of new adaptive controller to withstand these heavy disturbances. The new adaptive controller is tuned for optimal operation using two different optimization techniques (Invasive weed and Harmony search).Optimization results for the two techniques are compared. .A robustness test is made to check system stability to withstand different random irradiance and cell temperature patterns without failure to track the maximum power point.Finally, a brief comparison is made with a previous literature and the new adaptive controller gives better results

Methyl 2-({6-[(1-meth­oxy-2-methyl-1-oxopropan-2-yl)carbamo­yl]pyridin-2-yl}formamido)-2-methyl­propano­ate

In the title compound, C17H23N3O6, the two meth­oxy­carbonyl C—O—C=O planes are inclined at dihedral angles of 5.3 (4) and 83.9 (4)° with respect to the central pyridine ring. An intra­molecular N—H⋯O hydrogen bond generates an S(5) ring motif. In the crystal, mol­ecules are linked into a chain along the c axis via C—H⋯O hydrogen bonds

Last Guidelines Overview of Consecutive Esotropia Management: Review Article

Background: Consecutive esotropia (ET) is persistent esodeviation for 24 weeks afterward bilateral lateral rectus recession (BLRR) for correcting exotropia (XT) with or without diplopia. Some patients may have limited eye movement; amblyopia and loss of binocularity can result. Early postoperative overcorrection has been recommended in surgical treatment of intermittent XT due to tendency towards postoperative exotropic drift. ET with small angles (within 15 PD) vanishes naturally over time, whereas bigger angles are more likely to be present at the start. Patients who have ET that has persisted for at least 24 weeks after BLRR and has been present for more than 15 postoperative days should have surgery. Objective: Hallmark the updated lines of management of consecutive esotropia. Conclusion: For the purpose of maintaining one MR muscle for a future intervention, several research have shown that ET can be performed consecutively after BLR recession by advancement of LR muscle previously recessed and MR muscle recession in the more deviating eye. Studies in recent years have sought to determine the effectiveness of the use of lateral rectus advancement in the treatment of consecutive ET

Serum and Circulatory Omentin mRNA Gene Expression as Predictive Markers of Systemic Lupus Erythematosus Disease Activity and Lupus Nephritis

Background: Lupus nephritis (LN) affects 50% of systemic lupus erythematosus (SLE). LN often leads to renal failure. Thus, early diagnosis of LN is mandatory for the prevention of complications. Objective: We aimed to evaluate serum and relative omentin mRNA gene expression levels as a noninvasive diagnostic test of LN and to assess their correlations with disease activity, clinical and laboratory features of SLE.Patients and Methods: Case-control study included 104 subjects, 60 patients with SLE were stratified into two subgroups LN group (n=25) and the non-LN group (n=35). Disease activity was assessed by the SLE disease activity index (SLEDAI). Measurement of serum omentin was done by ELISA and investigation of omentin mRNA relative expression was done by real-time PCR.Results: Our results detected that serum omentin levels were significantly lower in the LN group and non-LN group compared to controls. Intriguingly, omentin mRNA relative expression levels were significantly lower in the LN group and non-LN group compared to controls. Among the LN group, there were significant negative correlations between serum and relative omentin mRNA expression with SLEDAI, clinical, and laboratory features of LN. Moreover, SLEDAI, proteinuria, and serum creatinine were independently correlated with them. The sensitivities and the specificities of serum omentin were 91% and 65.5% respectively. While the relative omentin mRNA expression diagnostic power showed sensitivities and specificities of 93% and 68.8% respectively.Conclusion: LN group had significantly lower values of serum and relative omentin mRNA expression compared to non-LN and control groups. Additionally, it was negatively correlated with SLEDAI, clinical and laboratory features of LN. Thus, they could be used as non-invasive predictive markers of LN

(E)-1-(1,3-Benzodioxol-5-yl)-4,4-di­methyl­pent-1-en-3-one

In the mol­ecule of the title compound, C14H16O3, all non-H atoms except for one methyl C atom lie on a crystallographic mirror plane. The conformation with respect to the C=C bond [1.3465 (12) Å] is trans. In the crystal, mol­ecules are linked via C—H⋯O hydrogen bonds into C(5) chains propagating along [100]

Effects of industrial processing methods on camel skimmed milk properties

Effects of pasteurisation (high-temperature-short-time; HTST), ultra-high-temperature (UHT), and high-pressure (HP) treatments on some physical and chemical properties of camel milk (CM), including whey protein denaturation, colour change, casein micelle size, and rennet coagulation time (RCT), was investigated. UHT treatment caused the biggest colour change and highest whey protein denaturation in CM; in contrast, the effects of HP treatments on these properties were considerably less. Casein micelle size decreased after all treatments. The RCT of CM was significantly delayed and coagulum strength (G′) decreased after HTST. HP treatment at 200 and 400 MPa increased the RCT of CM and the G′ value was the highest after treatment at 200 MPa. Processing at 600 and 800 MPa inhibited coagulation of CM. The effects of both thermal and non-thermal treatments on many constituents and properties of CM were different from those on constituents and properties of bovine milk