Effect of laser drilling on surface and material properties of AlN ceramics

For the laser drilling of aluminum nitride (AlN) ceramic the influence of the laser parameters and material properties on the drilling rate, quality of the holes and the effects related to plasma formation are investigated. The ablation is performed by pulsed irradiation of Nd:YAG laser at wavelengths of 1064, 532 and 355 nm, at pulse duration of 6 ns (FWHM) in air. The SEM scans of the processed surface reveal regular, cylindrically shaped holes of diameter of about 100 μm obtained under conditions of constant fluence at all wavelengths applied. Holes are surrounded by circular zones which are colored different than the non-processed surface, and of a much larger diameter. Comparison of the original material composition with that of the processed one made by EDX shows a decrease of the N concentration in the affected area. The zones are identified as heat-affected due to the high thermal conductivity of the ceramic material and change of the photon distribution due to multiple reflections into the material. In the LIBS spectra recorded in order to obtain the composition of the ablated material the presence of ions and neutrals depends on the laser intensity applied. At intensity values close to the ablation threshold the ejected material consists mainly of neutrals and doubling the intensity results in appearance of single-ionized Al species. The ionized species dominate over neutrals under conditions of higher drilling rate (15 GW/cm2 at 532 nm). Their existence in the plasma plume together with clusters is confirmed by the TOF-MS spectra. It also corresponds to the characteristic spatial structure of the plume. The investigation of the decomposition reactions of AlN in dependence on the applied laser intensity is based on numerical solving of the three dimensional heat-transfer equation. A solution consistent with the experimental observation indicates that at threshold the ceramic decomposes into gaseous nitrogen and solid Al particulates, while at higher fluences the Al vaporizes and influences the drilling quality

INFORMATION SYSTEMS DEVELOPMENT PLAN FOR DAVAO CENTRAL CONVENIENCE STORE CABALUNA

Discrepancies and inaccuracies are common problems in a manual system. It undermines the potential of the business to align with modernizing standards of the retail industry. Implementing an optimized information system reverses those errors into positive effects for the company. This paper conceptualized the issues which is the intent to resolve. Adapting to the Point-of-Sale system comprehends the business position and creates decisions out of the information. It automates major processes boosting productivity. Utilizing technology facilitates managing the volume of information. It offers security measures and flexibility in handling everyday transactions

Information Systems Development and TECHNOLOGY Plan for F.i Auto Supply

F.I Auto Supply is a small retail store of auto parts located in Salvacion, Panabo City. The company has dealt daily with the traditional manual transaction process, which gave them difficulties in tracking the conciseness of the company's products' sales and inventory. The researchers proposed an Auto Supply Management System with Automated Inventory Mobile Scanning to aid the problem. This system will help automate the company's inventory and sales conduct and produce concise and accurate information regarding how well the business is running in a specified period. Moreover, it will also help them be attentive to the number of stocks available in the store to make plans ahead of time, like what supplier the products should be coming from, and estimate the time of transaction. Furthermore¸the proposed system also gives the business an edge to a higher quality of image branding and customer relationships thru enhanced service time efficiency

Information Systems Development Plan for Davao Central Convenience Store Cabaluna

Discrepancies and inaccuracies are common problems in a manual system. It undermines the potential of the business to align with modernizing standards of the retail industry. Implementing an optimized information system reverses those errors into positive effects for the company. This paper conceptualized the issues which is the intent to resolve. Adapting to the Point-of-Sale system comprehends the business position and creates decisions out of the information. It automates major processes boosting productivity. Utilizing technology facilitates managing the volume of information. It offers security measures and flexibility in handling everyday transactions

Social Structural Factors on Academic Outcomes and Satisfaction in Online Distance Education Courses Among College Students in Panabo City

This study assessed and determined the significant relationship between two variables: Social Structural Factors on Academic Outcomes and Satisfaction in Online Distance Education Courses. The study participants are college students, and researchers used quota sampling since the respondents are within Panabo City. This study used a  correlational research design with proper statistical tools such as Anova, Shapiro-Wilk Test, and Wilcoxon Signed-Rank Test. The adapted research questions break down into the following parts: Demographic Profile of the Study, Social Structural Factors on Academic Outcomes, and Satisfaction in Online Distance Education Courses, which data hoarded through online Google Forms. In the result, the p-value is 2.2e-16 is less than the 0.05 significance level. Therefore, there is a significant difference between the Level of Social Structural Factors on Academic Outcomes and the Level of Satisfaction in Online Distance Education Courses. Hence, it shows that Social Structural on Academic Performance influences Satisfaction in Online Distance Education Courses