Raster angle impact on FDM-based additive manufactured fluidic oscillator

The interior surface of a fluidic oscillator produced by FDM (Fused Deposition Modeling)-based additive manufacturing is associated with a directional pattern corresponding to the 3D printing raster angle. The present research explores the impact of raster angle α=0, 45, and 90\ub0 from three commercial 3D printers versus a CNC machined oscillator. The surface is characterized using an optical 3D measurement system. The performance of the emanated jet is assessed using hot-wire anemometry downstream of the outlet nozzle, and the required supply pressure is measured at the actuator inlet. Printer P1 with an actuator average roughness S̄a=8.3 μm and printer P2 with S̄a=29.9 μm inherit clear raster patterns while actuators printed by printer P3, more economical compared to printer P1, do not exhibit an evident pattern related to raster angle with S̄a=17.7 μm. Regardless of the type of printer and associated surface texture, oscillators with 0\ub0 raster angle provoke higher jet spreading accompanied by a lower required supply pressure compared to the milled sample. Strikingly, the performance for P30 and P390 is noticeably superior to the other printed oscillators and surpasses the milled actuator in terms of jet switching quality. Power-law fit is depicted to estimate the jet spreading versus surface roughness for each raster angle

Land suitability modelling using geographical information system (GIS) and multi-criteria decision making (MCDM)

There has been growing concern that the development activities have high potential to cause environmental problems. The decision-makers are trying hard to reinforce new policies and procedures towards sustainable development projects. Finding adequate land for any new business or development activity is a key factor considered in sustainable theories. Big projects involve numerous factors, and this makes land selection as a complex activity; thus, it is not easy to find the best suitable land parcel for development projects. Therefore, this chapter highlights the significance and effectiveness of GIS and MCDM in resolving various land suitability issues. The integration of GIS and various MCDM approaches is successfully seen in resolving land suitability problems in the world

Numerical Analysis of Settlement of a Piled Raft Foundation on Coastal Soil

There is a growing demand for multi-story buildings for residence and commercial purposes in coastal areas of Sindh, Pakistan. Such types of soils are generally considered more compressible with high groundwater levels, which may cause lower shear strength and higher settlement. The computation of the settlement of foundations requires the use of advanced constitutive models, which are not commonly used due to a lack of field or experimental data. This study is carried out to illustrate the use of an advanced soil model, i.e., Hardening Soil Model for the computation of settlement. For this purpose, numerical modeling was carried out using Finite Element Program PLAXIS 2D. Initially, the MC Model was utilized for the calculation of the settlement of a 10-story building in the coastal soil. In addition, parametric analyses for the effects of modulus of elasticity, permeability, and dilatancy angle were carried out. The results mainly suggest that the settlement of the building constructed on a piled raft foundation, predicted with the MC model, was 40% higher than that of the HS model. For prediction of settlement of the piled raft foundation, the results suggest that the HS model can be given preference as compared to the MC model. Doi: 10.28991/CEJ-2023-09-02-05 Full Text: PD

Integration Management: A Bibliometric Study of Research Trends

Integration management has always been a topic of interest for researchers. It plays a significant role in the success of the projects. Integration management effectively incorporates all the aspects of projects and provides a roadmap towards their success. Based on the significance of the term, this paper assesses the research output of integration management since 1970 in different fields of the application using the Scopus database. The data was collected and analyzed through Microsoft Excel to analyze the research publications trend line, publication types and their access to the audience, organizations and countries involved, languages of publications, authors participating, and their respective field of research in relation to integration management. This paper will assist the researcher of this area to observe the research trends on the integration management topic as per the Scopus database until 2021

An Assessment of Research Trends on FISCAL POLICY

Fiscal policy has been a topic of research interest for researchers. It plays a very important role in the economic growth of any country. Fiscal policy does not only achieve economic development, but eliminates the hindrances that assist economic stability. Based on the significance of the term. This paper evaluates the research output of the term fiscal policy since 1970 in different fields using the Scopus database. The data was collected from the Scopus database and were analyzed using Microsoft Excel to analyze the research trends on fiscal policy. It is concluded that fiscal policy has been a topic of researchers\u27 focus since 1970 but higher attempts are made after 2000. Most of the researchers prefer journal article publications and only 1% are in the press, whereas all other articles are already published. Most of the publications are published in the English language and the researcher from the field of Economics, Econometrics & Finance, Social Sciences and Business, Management & Accounting are publishing the most on fiscal policy. This paper will assist the junior researchers to find the gap and design their future research on fiscal policy as this paper compiles the database of the last five decades available on Scopus

Effect of length of steel fibers of waste tires on splitting tensile strength of concrete

The increase in volume of vehicles ultimately increases the number of waste tires. The proper disposal or reutilization of waste tires is a challenge. This study is aimed to utilize the steel fibers of waste tires as reinforcement in concrete. Concrete cylinders were cast with addition of different percentages of steel fibers (0-2%) and length (10-20 mm). The fresh and hard properties of concrete reinforced with different percentages of steel fibers and lengths were observed. It is seen that splitting tensile strength of concrete increased with increase in the length of fiber and with the increase in the percentage of fiber. The inclusion of the fibers in concrete causes the reduction in the workability of concrete

Suppression of the wake steady asymmetry of an Ahmed body by central base bleed

Base blowing is applied through a small, centrally located square aperture at the base of a flat-backed Ahmed body. In addition to the expected drag reduction effect at low momentum injection (i.e., base bleeding effect), a major result is the complete suppression of the steady asymmetry of the wake. Both the maximum drag reduction and the minimum magnitude of the base pressure gradient are achieved for the same optimal blowing coefficient of the actuator. Independent force measurements corroborate the suppression of the wake asymmetry. Different scales of base blowing reveal a similar maximum drag reduction and asymmetry suppression, where the optimal blowing coefficient is found to scale with the bleed-to-base area ratio as (Sj/S)1/2

Exploring Types of Waste Generated: A Study of Construction Industry of Pakistan

The construction sector is responsible for providing fundamental physical structure required for living and survival of human life. Increased development works have led in resulting the massive amount of waste generation in developing countries. Due to poor management system on sites, it has become more crucial and exerts several negative impacts on society and the environment. This Unused waste material has a negative impact on the ecosystem and needs a considerable amount of money for recycling, reusing and disposal of the waste. Like other developing countries Pakistan is spending a significant portion of its GDP on handling construction waste. Among the several other factors, the key contributes are highlighted in this study. This study is exploratory work investigating the types of construction waste generated on site and their relative impact of the project cost in construction projects of Pakistan. Through questionnaire the opinion of clients, consultant and constructor have been taken to identify the major types of waste having more impacts on cost and time. Through Average index, severity index and importance index, the probability of occurrence of waste through different materials, severity level of waste production by these materials, and the overall effect of all waste generating materials have been found respectively. Among the materials sand, concrete, tile is the most common materials, which are responsible for a waste generation while time and cost are the two most common non-physical waste generating factors

BOT ARRANGEMENTS FOR INFRASTRUCTURE PROJECTS IN PAKISTAN

Master'sMASTER OF SCIENC