This article presents the impact damage of un-peened and peened of AA7075-T6 specimen using water jet peening processes. The mechanical properties on residual stress, micro hardness, fatigue test and fracture surface morphology of an AA7075-T6 were investigated. In this experiment, an electro-hydraulic servo control test machine, Vickers micro-hardness tester,scanning electronic microscope and optical microscope were utilized to observe the residual stress, micro hardness, fatigue test and fracture surface morphology of an AA7075-T6 under different incident pressures. The results indicated that the residual stress, micro hardness, fatigue test and fracture surface morphology of the AA7075-T6 material increases as the incident pressures increases.

Keywords: impact damage; un-peened; water jet peening; micro hardness; surface morphology.

This research is intended to find the best combination of sintering temperature and weight fraction composition in the formation of ceramic composites made from glass powder with fly ash which produces the highest hardness. Material engineering is expected to be able to develop new materials that are environmental friendly by utilizing glass waste and coal dust (fly ash) which is often found around power plants and cement industries in Barru districts, South Sulawesi province. Glass waste is cleaned and ground into glass powder up to 200 mesh then mixed with coal powder waste (fly ash) which has been calcined in furnace at 800°C then formed in a stainless steel metal mold with composition of 3 weight fractions..........

Keywords: Fly ash, glass powder, weight fraction, temperature and hardness.

The escalating threat landscape of ransomware attacks has prompted the exploration of innovative technologies for enhancing detection and prevention strategies. This survey paper presents a detailed examination of the evolving landscape of blockchain-based solutions designed to fortify defenses against ransomware threats. Traditional security measures have proven inadequate in thwarting these attacks, leading to a growing interest in blockchain technology as a robust foundation for ransomware detection and prevention. The paper begins by providing an in-depth overview of ransomware and its various forms..........

Keywords: Blockchain, Ransomware, Cybersecurity, Decentralization, Smart Contracts, Consensus Algorithm, Immutability, Continuous Monitoring, Transparency.

Research in robotic instrumentation and application is advancing technology towards reduction of human labour. Hence, the aim of this research work is to develop an automated robotic lawn mower powered by solar system. The novel approaches are logging of voltage, current, date, time, temperature and humidity automatically, thereby enhancing evaluation of performance of the instrument. The design is built on a mobile robot carrying a 20 Watts polycrystalline solar panel. The material requirement of the design includes esp32 microcontroller programmed in integrated development environment (IDE). Other modules interfaced with the microcontroller are DHT11 humidity sensor for humidity measurement, HC-SR04 ultrasonic sensor for obstacle detection, ACS712 30A current sensor model for current drained sensing of the cutter motor, a dc cutter motor of 2800 rpm, five 12V relays (one for the cutter motor, two per rear wheel motor of the two wheels.........

Keywords: Microcontroller, Integrated Development Environment (IDE), Alphanumeric, Polycrystalline, Robotic.

For a long time, language has been seen as a system consisting of two different modules: vocabulary and grammar. Individual words are composed of smaller units such as morphemes, phonemes, and letters, and single words can be further combined into larger language units such as phrases, sentences, and formulaic language. Formulaic language refers to the combination of form and meaning that is formed in the minds of language users on the basis of long-term, extensive language contact and language experience. Its basic features at least include the following: first, formulaic language is a multi-word unit that is larger than a word but smaller than a sentence, generally consisting of two or more words; second, formulaic language has a certain degree of frequency, and the distribution of formulaic language is affected by factors such as frequency; third, formulaic language has a certain degree of predictability.

To investigate the effect of the basalt fiber on the mechanical properties of the active powder concrete, the BF-RPC compression test was carried out under the hot water curing condition. The test results that the addition of BF could improve the mechanical properties of RPC, and with the increase of BF content the compressive strength of RPC showed a trend of first increasing and then decreasing. Besides, the optimal BF content is 0.15%, which increases the strength by 20.2%, And a prediction equation of compressive strength was proposed by analyzing the influence of BF on RPC mechanical properties with different BF content.

KEYWORDS;- Hot water curing; BF; RPC; mechanical properties; prediction equation

Ageing or under-maintained equipment is usually expected to perform less efficiently than a new equipment. In this paper, plant efficiency (kW/RT) is used as an energy efficiency indicator. Data analytics, based on aggregation operations, filtering and forecasting, allows us to obtain knowledge from chillers and the equipment, to prescribe the appropriate maintenance strategies. The Energy Management System (EMS) that implements these rules establishes when a chiller stage up/down or flow rate increase/decrease according to different efficiency criteria with respective to cooling demand. A data-driven integrated strategic and sustainable asset management practices via green and smart facility management concepts, enabled an 11-year chiller plant in an educational institution in Singapore to perform more efficiently with lower carbon footprint as compared to when it was first installed in year 2010.

KEYWORDS;- Smart building, energy efficiency

Marine Controlled Source Electromagnetic (CSEM) data was acquired in a Frontal Toe Thrust Belt offshore Niger Delta over a prospective area delineated by 3D Seismic anomalies. The CSEM survey consisted of three towlines totalling 94.5Km with 28 receiver points. An integrated analysis of the Electromagnetic and Seismic data was carried out to evaluate the hydrocarbon potential of four prospects in the study area. Regional and Prospect scale Seismo-stratigraphic interpretation of reservoir tops within the anomaly complex was carried out using the 3D seismic data and provided appropriate input surfaces for subsequent 2.5D constrained CSEM inversion. Normalized Magnitude Versus Offset (MVO) and Phase versus Offset (PVO) were calculated at all offsets to generate anomalies at the corresponding source-receiver mid points........

In our previous article, we developed a composite material from Iroko wood flour stabilized by High Density Polyethylene (HDPE) resin. The mechanical properties of these bricks were evaluated. They showed good behavior under traction, compression and bending. The aim of this work is to analyze the water behavior of these composites. The study focused on six samples due to the HDPE contents of 10%, 20%, 30%, 40%, 50%, 60% and 60%. To do this, we first evaluated the apparent and particle densities, and the porosities. Then, the water content was determined. Finally, the behavior of the different bricks was analyzed by immersion in liquid water, by capillarity and by exposure to different relative humidity of 72% and 98%. In each case, twelve measurements were taken and the standard deviations were calculated..........

KEYWORDS;- Iroko wood, HDPE, bricks, Water behavior, Durability

Availability of fresh water is a major challenge in the current world and rapid expansion of industrialization and urbanization has worsened the situation. The present project work caused out to understand the level of water degradation of Walayar river, Palakkad, Kerala. Many locals are depending on this water source for their daily needs. Now there are several concerns regarding the safety of using Walayar river water for drinking and other uses due to an increase in industry and the accompanying discharge of untreated and semi-treated wastes into the river. These wastes, which were released into the water system from various industries, changed the physiochemical and biological characteristics of riverine ecology.......

During the recent couple of years, significant jellyfish blooming occurred in the bays among the power plants along the Arabian Gulf coast, which was an indication for Kuwait and other countries in this region. These blooms often result in blocking the cooling water intake and clogging of the filters and pumps, which leads to the shutdown of generation units and outages. Presently, shift the focus from reaction to prevention. Such a problem can't be solved only with the existing manual monitoring methods. The following paper argues for an inexpensive and humane solution by combining, a) a LiDAR-based detection system for aquatic species that functions under water, b) drone-based surveillance, c) image processing software........

With the rapid development of society and economy, existing highway bridges need to be widened to meet the dramatically increasing traffic volume. Fisrtly, this study compares and analyses bridge widening methods and splicing techniques for old and new bridges. Secondly,taking a T-beam bridge-the Hualong Bridge after being widened as an example, the effects of shrinkage and creep and foundation settlement on its mechanical characteristics was analysed based on finite element method. Research has shown that the bridge structure generated a stress increment of 5.5 MPa under the influence of shrinkage and creep, at a distance of one-fifth of the span from the end of the bridge. The end position of the widening bridge and the adjacent main longitudial beam of the old bridge are the most affected locations, with a maximum stress increment of 3.0 MPa under the 15 mm settlement. Therefore, the influence of shrinkage and creep and foundation settlement should be considered in the design. It provides some references for the difficult and heavy design of bridge widening.

KEYWORDS;- Bridge widening; Splicing technology; Shrinkage and creep; Foundation settlement

The paper deals with the determination of the yield strength of tinplate packaging sheets with thicknesses of 0.14-0.191 mm. Given the significant changes in the production of tin-coated packaging sheets and the ever-increasing demands on their properties, there is a requirement to use evaluation methods that can quickly and at low costs determine especially the mechanical and plastic properties of the sheets. Based on the existing know-how, new test methods have been developed that more closely correspond to the stress state of steel sheets during technological processing. The paper compares the yield strength in the test with uniaxial and biaxial tension and in the springback test. The paper describes the methods of its evaluation by the mentioned tests and graphically interprets the results achieved by these methods.

KEYWORDS;- yield strength, uniaxial tensile test, biaxial test, springback test.

In this paper we address the Customer Churn Prediction Problem (CCPP). CCPP is an NP-Hard classification problem that involves predicting and identifying potential churners based on historical data so that appropriate measures, interventions, or strategies can be implemented to retain or mitigate the negative impact of their departure. Our objective is to identify and scrutinize methodologies that augment the accuracy and efficacy of customer churn predictions. Through our analysis, it was revealed that automatic churn prediction encounters a challenge stemming from the inherent disparities within the dataset.........

KEYWORDS;- Customer Churn Prediction, Imbalance Class, Insurance, Machine Learning models