Jurnal Teknosains
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Make discovery through serendipity: a generative design platform for performative architectural design exploration
No full textThe repercussions of information technologies in the design process are undoubtedly revolutionary. As the digital natives will no longer require a traditional method to learn digital tools in architecture, there is a need to shift from tradition-bound techniques to an experimental mode where creativity and innovation rely upon a platform of explorative, speculative, and the recognition of serendipity and error as a credible basis on which innovation occurs. This study seeks to embrace a new method for design exploration by a generative design platform. Form-finding is encouraged through a bottom-up process of speculative actions. The goal is to cultivate serendipitous discoveries in the design process and leverage generative tools to explore performative aspects of architecture. The findings of this research offer some insights into how generative design platforms can encourage performative architectural design exploration.
Master recession curve visualization using seven baseflow recession models in paired watersheds
No full textRiver flow recession analysis plays a crucial role in understanding how watersheds release water during dry periods. Consequently, modeling baseflow recession is closely related to the characteristics of unconfined aquifers, storage behavior, and the discharge properties of the watershed. While several theories exist on modeling recession curves, limited research has compared different approaches regarding baseflow recession characteristics. This study aims to model seven baseflow recession equations in paired watersheds in Ambon City. The research methodology involves calibrating seven baseflow recession models using the Recession Curve (RC) 4.0 Hydro Office software. The tested models include Linear Reservoir, Exponential Reservoir, Double Exponential Horton, Dupuit-Boussinesq Aquifer Storage, Depression Storage, Turbulent Flow Model, and Hyperbolic Function Model. The calibration results yield optimal combinations of recession parameters. The parameterization order from highest to lowest is as follows: Depression Storage, followed by the Hyperbolic Function, Exponential Reservoir, Turbulent Flow Model, Double Exponential Horton, Linear Reservoir, and Dupuit-Boussinesq Aquifer Storage. Quantifying baseflow recession constants and coefficients is essential for understanding baseflow behavior. Visualizing the slope of the Recession Curve (MRC) reveals that models with high recession constants tend to have gradual MRCs, while low recession constants result in steep MRCs. The MRC slope further describes the relationship between storage conditions and discharge from the watershed. The advantage of creating MRCs from discontinuous recession segments lies in their ability to appropriately describe the MRC process and provide quantitative parameters relevant to drainage mechanisms. MRCs also serve as an optimal automated computational tool
Mapping settlement typologies and business functions in yogyakarta riverbank area
No full textA residential property functions as a place to live. In some conditions, a residential space can be transformed into a business or production space simultaneously. Business or production spaces require indoor comfort, such as the minimum standards for indoor lighting, which can be challenging to achieve in a dense residential area. This affects the typology of business space, which is integrated with the residential function. This research is part of a study of visual comfort or lighting in workspaces or business spaces. This research aims to identify types of dwellings that have changed from residential to business functions in dense settlements such as urban kampungs or villages. The study is in the Suryatmajan subdistrict in Yogyakarta City, including the urban villages of Ledok Macanan, Gemblakan Atas, Gemblakan Bawah, and Cokrodirjan. The identification will produce mapping that provides information regarding the types of residences and businesses found at the study location. The method used is a descriptive-qualitative study, which collects data through field observations, redraws from observations, and short interviews with residents of the study location. The study found six typologies of residential and business space commonly found in the four urban villages in Yogyakarta..
Male uav longitudinal stability determination using wind tunnel data
No full textUnmanned aerial systems have been increasing in demand for a wide range of operations, including the rapid growth of advanced navigation and communication. One of the most important things in designing an Unmanned Aerial System (UAS) is to ensure the system's stability, such as the UAS itself. This study was conducted on an in-house medium altitude long endurance (MALE) UAS aircraft. It is focused on analyzing the longitudinal stability of MALE UAS. A mathematical approach was used to analyze the longitudinal stability. A series of wind tunnel tests using a scaled model of the MALE UAS is done to produce several sets of data containing longitudinal stability derivatives for various configurations. A few sets of data are chosen to obtain the stability derivatives needed. These stability derivatives are utilized to determine the longitudinal motion characteristic of the aircraft. The analysis of certain derivatives and the phugoid and short-period mode shows that the aircraft is statically and dynamically stable in longitudinal motion. The results indicated that a weight change prompted an altercation in the natural frequency of the short-period mode. The response also showed that reaching a new equilibrium state takes a rather long period after an arbitrary perturbation is initiated. The time required to subdue oscillation in axial and average velocities is more than 100 seconds. The stability in the pitch rate is reached in around 65 seconds. The time to reach stability in pitch angle response is around 65 seconds
Comparison of physical and acceptability tests of extra oral suction in rsgm ugm prof. Soedomo
No full textThe spread of COVID-19 through aerosols and droplets occurs during dental treatment. Dentists use high-volume suction (HVS) and saliva ejectors to suction saliva, blood, and water from the oral cavity. Since the pandemic, prototyping, production, and use of extraoral suction (EOS) have increased. EOS comprises HEPA (High-Efficiency Particulate Air), plasma ions, and ultraviolet (UV) filters. This study was used to see the effectiveness of the use of EOS through a comparison of physical and acceptability tests on the use of EOS at UGM Prof. Sodeomo Dental Hospital using three EOS brands, Coxo™, Eighteeth™ Vacstation, and Eostra™. Physical Test is used to assess the ability of a tool when used—Acceptability Test to assess user acceptance of EOS based on usage experience. The study was conducted at the UGM Prof. Soedomo Hospital (Professional Education Clinic, Resident Education Clinic, General Service Unit, and Specialistic Service Unit) in 2021 with 90 respondents who were EOS users. The EOS with the most incredible suction power, noise figure, and electrical power was Eostra™, while based on user experience, the EOS that was more accepted and more comfortable for users to use was Coxo™. EOS reduces aerosol exposure during dental treatment, and based on this study, EOS that had good capacity was not necessarily comfortable to use by users; this was because each brand had advantages and disadvantages, so the selection of EOS was adjusted to the capacity of the operator and the practice site
EDITORIAL
No full textGreetings to the Readers of Jurnal Teknosains!We are delighted to present the latest edition of Jurnal Teknosains, Volume 14, Number 1, December 2024. This issue highlights groundbreaking contributions in the realms of technology and science, reflecting our dedication to fostering interdisciplinary insights into the challenges and opportunities of our rapidly evolving world. One of the central themes in this edition is the intricate interaction between humans and their environment. Notably, the study on visualizing streamflow recession curves demonstrates how mathematical modeling serves as a critical tool in water resource management. Employing multimodel approaches for baseflow recession analysis, this research underscores the importance of accurate data in understanding aquifer characteristics and water storage capacities on both local and global scales. In the domain of healthcare technology, innovation in enhancing the biocompatibility of acrylic materials with natural fibers takes center stage. The incorporation of bio-based fibers, such as banana fronds, offers a sustainable and biologically safer alternative while significantly improving material performance. This promising development addresses future demands for environmentally friendly and safe materials
Uji komparasi desinfektan septalkan, terralin, dan alkohol 70% terhadap daya sterilisasi permukaan kursi dental
No full textCross-infection has the potential to occur in the Dental and Oral Hospital due to cross-transmission of pathogenic microbes through dental chair surfaces that are contaminated with microbes. This study aims to compare the effectiveness of three types of disinfectant Septalcan, Terralin, and 70% alcohol on the inhibition of pathogenic microbes originating from the oral cavity of patients who contaminate the surface of dental chairs in aerosol and non-aerosol clinics. Sampling of microorganisms was carried out using the technique of wiping/swab the surface of dental chairs in aerosol and non-aerosol clinics before and after the disinfection process with three types of disinfectants. The decrease in the number of germs before and after the disinfectant process is used as a parameter for the effectiveness of the disinfectant. The results of the one-way ANOVA statistical test shows that there is no significant difference in the effectiveness of the three types of Septalcan, Terralin, and 70% alcohol in reducing the number of germs on the surface of dental chairs. The three types of disinfectants are able to minimize the risk of cross-infection due to pathogenic microbial contamination on the surface of the dental chair
Optimized condition for pei-based transient transfection of lifeact-gfp/nls-mcherry expressing plasmid used as cell barcode for syncytia live cell imaging
No full textThe transfection efficiency positively affects the successful plasmid DNA transfer into cells, with the highlight on the amount of plasmid DNA and its ratio to the transfection reagent. Polyethyleneimine (PEI) is a cost-effective transfection reagent that facilitates DNA transfer by forming positively charged DNA complexes. It allows DNA to interact with negatively charged cell surfaces and enter the cells by endocytosis. In this study, we optimized the condition for transient transfection of life act-GFP/NLS-mCherry-expressing plasmid in BHK-21 and 293T cells using PEI. This plasmid is helpful as a biosensor of the cytoskeleton and nucleus that enables live imaging observation using a fluorescence microscope, for instance, in the observation of syncytium. Here, we optimized two independent variables: the amount of DNA (0.5 and 1 µg) and the ratio of DNA-PEI (1:3 and 1:4). GFP and mCherry expressions were observed at 24, 48, and 72 h post-transfection. As a result, transfection efficiency achieved by using PEI in 293T cells is higher than in BHK-21 cells, which are ~90% and ~50%, respectively. Moreover, amongst four different transfection conditions, in both cell lines, 1 µg of plasmid DNA with a 1:3 DNA-PEI ratio yields the most efficiency with the least amount of toxicity. We used this condition for the syncytia observation in 293T cells as a model of the cell-to-cell transmission of SARS-CoV-2. Syncytia formation was successfully observed by detecting the giant cells expressing GFP/mCherry with multiple nuclei
Community interest in developing tourist villages based on neuroscience methods
No full textRawabogo Village is one of the tourist villages in Bandung Regency with insignificant development since its establishment. Community participation is important in the stages of development. However, measuring context in real time and accurately is generally difficult. Neuroscience can be used to control the validity and subjectivity of the questionnaire and interview methods used to examine neural responses to tourism conditions. Thus this study aims to identify the people of Rawabogo Village's interest in developing a tourism village based on neuroscience methods. The results of the data analysis show that the people of Rawabogo Village have a strong interest in developing a tourist village. The result is indicated by the entropy value obtained and the results of the questionnaire scoring. The neuroscience method in tourism village development acts as a method that supports, complements, and validates existing tourism village development concepts or methods such as Community Based Tourism (CBT)
Microsoft building footprint application To detect human exposure due to tsunami
No full textTsunami events at night are more prone to causing fatalities because humans are resting in residential buildings (houses). In this study, residential buildings were extracted using the Microsoft Building Footprint (MBF), which resulted from applying artificial intelligence technology. This study aims to analyze the number of people exposed to tsunamis at night using MBF. The tsunami modeling was carried out using the Berryman method. Sentinel 2-A Image extracted from Google Earth Engine. The results of the inundation modeling analysis show that the total inundated area is 717 Ha or 17.34% of the total area. The results of the MBF accuracy analysis on the entire data are a Precision of 99.02%, Recall of 98.40%, and F1 score of 98.71%. The results of the MBF error analysis are False Positive 0.97%, False Negative 1.60%, and Intersection of Union 0.12%. The number of people exposed is 2,749, or 6.32% of the total population