Jurnal Teknologi最新文献_第2页

TAPERED ANGLE MICROFLUIDIC DEVICE FOR CELL SEPARATION USING HYDRODYNAMIC PRINCIPLE 利用流体力学原理进行细胞分离的锥角微流控装置

Jurnal Teknologi Pub Date : 2024-06-02 DOI: 10.11113/jurnalteknologi.v86.19449

Muhammad Asyraf Jamrus, Mohd. Ridzuan Ahmad

{"title":"TAPERED ANGLE MICROFLUIDIC DEVICE FOR CELL SEPARATION USING HYDRODYNAMIC PRINCIPLE","authors":"Muhammad Asyraf Jamrus, Mohd. Ridzuan Ahmad","doi":"10.11113/jurnalteknologi.v86.19449","DOIUrl":"https://doi.org/10.11113/jurnalteknologi.v86.19449","url":null,"abstract":"\u0000\u0000\u0000\u0000Cell sorting is an essential technique used in a wide range of research, diagnostic, and therapeutic sectors. Fluorescence-activated cell sorting (FACS), magnetic-activated cell sorting (MACS), and CellSearch, which are conventional techniques, possess inherent limitations. For instance, the utilization of EpCam was ineffective in identifying specific malignancies. Cell sorting techniques have undergone significant advancements, with microfluidics being one of them. Regrettably, the current devices suffer from issues such as clogging and necessitate a lengthy main channel. Therefore, the goal of this work is to build and improve a microfluidic device with a tapered angle. There are three designs presented, each with one inlet, at least two exits, one focusing zone, and one tapering region. Using the finite element simulation software COMSOL Multiphysics, two studies are undertaken, the first examining the effect of taper angle on particle separation, and the second analyzing the effect of flow rate on particle separation. Based on the hydrodynamic theory and sedimentation process, this design allows particles to separate. When the taper angle approached 20 degrees, a mixture of 3 μm and 10 μm polystyrene microbeads were successfully separated, and separation continued until the taper angle approached 89 degrees. This technology offers simple, label-free, and continuous separation of many particles in a self-contained device without the use of bulky gear.\u0000\u0000\u0000\u0000","PeriodicalId":55763,"journal":{"name":"Jurnal Teknologi","volume":"16 19","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141272832","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

APPLICATION OF IMAGE DIGITAL PROCESSING TO EVALUATE ACCURACY IN PREDICTING ROCK FRAGMENTATION INDUCED BY BLASTING 应用图像数字处理技术评估预测爆破引起的岩石破碎的准确性

Jurnal Teknologi Pub Date : 2024-06-02 DOI: 10.11113/jurnalteknologi.v86.20743

Supandi Sujatono

引用次数: 0

EXPERIMENTAL STUDY ON THE EFFICACY OF ULTRASOUND IN IN-SITU DETECTION OF CORROSION IN PALM OIL REFINING EQUIPMENT 关于超声波在现场检测棕榈油精炼设备腐蚀情况的功效的实验研究

Jurnal Teknologi Pub Date : 2024-06-02 DOI: 10.11113/jurnalteknologi.v86.21925

Jan Lean Tai, M. T. Hameed Sultan, Farah Syazwani Shahar

引用次数: 0

INTERLOCKING BRICKS AND PRISMS USING WASTE GLASS AGGREGATES BY INTEGRATING GEOPOLYMER TECHNOLOGY 通过整合土工聚合物技术，利用废玻璃骨料制成联锁砖和棱柱体

Jurnal Teknologi Pub Date : 2024-06-02 DOI: 10.11113/jurnalteknologi.v86.21699

K. Rathinam, Karthick Kumar P. V., Srikiruthiga S., Vijay P.

{"title":"INTERLOCKING BRICKS AND PRISMS USING WASTE GLASS AGGREGATES BY INTEGRATING GEOPOLYMER TECHNOLOGY","authors":"K. Rathinam, Karthick Kumar P. V., Srikiruthiga S., Vijay P.","doi":"10.11113/jurnalteknologi.v86.21699","DOIUrl":"https://doi.org/10.11113/jurnalteknologi.v86.21699","url":null,"abstract":"An attempt has been made to develop sustainable and low-cost geopolymer interlocking bricks using the binders namely Ground Granulated Blast Furnace Slag (GGBS) and fly ash by activating them with hydroxides and silicates of sodium. M-Sand is used in combination with waste glass as fine aggregates. Seven mix ratios adopted are : Bricks with 100% M-Sand, 90% M-Sand and 10% waste glass, 80% M-Sand and 20% waste glass, 70% M-Sand and 30% waste glass, 60% M-Sand and 40% waste glass, 50% M-Sand and 50% waste glass and 40% M-Sand and 60% waste glass. Physical tests were conducted for all the materials used. In total, eighty-four interlocking bricks of size 300 mm x 200mm x 125mm were cast and the bricks were kept in room temperature for 28 days. Interlocking bricks were then tested for density, compressive strength and water absorption. Prisms of length 600 mm, height 375 mm and width 200 mm were constructed using three layers of interlocking bricks and subjected to compressive load. Interlocking bricks with 70% M-Sand and 30% Waste glass exhibited maximum compressive strength and low water absorption. Prisms with 70% M-Sand and 30% waste glass has maximum ultimate load carrying capacity and energy Absorption.","PeriodicalId":55763,"journal":{"name":"Jurnal Teknologi","volume":"6 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141273537","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

INFLUENCE OF CRUSHED BRICK COLUMNS ON GEOTECHNICAL PROPERTIES OF EXPANSIVE SOIL 碎砖柱对膨胀土岩土特性的影响

Jurnal Teknologi Pub Date : 2024-06-02 DOI: 10.11113/jurnalteknologi.v86.21191

Ng Jun Shen, Muzamir Hasan, Low Yong Ler

{"title":"INFLUENCE OF CRUSHED BRICK COLUMNS ON GEOTECHNICAL PROPERTIES OF EXPANSIVE SOIL","authors":"Ng Jun Shen, Muzamir Hasan, Low Yong Ler","doi":"10.11113/jurnalteknologi.v86.21191","DOIUrl":"https://doi.org/10.11113/jurnalteknologi.v86.21191","url":null,"abstract":"\u0000\u0000\u0000\u0000Utilization of crushed brick which is a common industrial material that is potentially wasted during the construction process in ground improvement can relieve its detrimental effects on the environment thereby reducing the waste disposal challenges. Hence, this study proposes its utilization as reinforcement to the soft clay soil. The tests mainly focused on the particle size distribution (PSD), specific gravity, Atterberg limit, proctor analysis as well as the shear strength parameters from Unconfined Compression Test (UCT). Coherently, the vibro-replacement method was deployed within a small-scale laboratory approach as a prediction model for the construction of a group of crushed brick columns. The column design was mainly classified into partially penetrated columns which have 60 mm and 80 mm height, and fully penetrated columns with 100 mm height. The mass of crushed brick used was approximately 1.07% - 4.56% of its total mass of specimen which produces the shear strength improvement rate from 11.00% - 18.55%. From the obtained results, the use of fully penetrated 100 mm diameter columns enhanced the undrained shear strength of kaolin clay to the maximum value, 26.20kPa or 18.55% as compared to the control sample with no reinforcement, which reduced the soil settlement and promoted the use of sustainable material in ground improvement.\u0000\u0000\u0000\u0000","PeriodicalId":55763,"journal":{"name":"Jurnal Teknologi","volume":"26 20","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141273061","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

EVALUATION OF GEOMETRIC MORPHOMETRIC APPROACH FOR ETHNICITIES DISCRIMINATION USING HANDWRITTEN NUMERAL CHARACTERS 评估利用手写数字字符进行种族识别的几何形态计量学方法

Jurnal Teknologi Pub Date : 2024-06-02 DOI: 10.11113/jurnalteknologi.v86.21816

Wan Nurul Syafawani Wan Mohd Taufek, Helmi Mohd Hadi Pritam, Wan Nur Syuhaila Mat Desa, D. Ismail

{"title":"EVALUATION OF GEOMETRIC MORPHOMETRIC APPROACH FOR ETHNICITIES DISCRIMINATION USING HANDWRITTEN NUMERAL CHARACTERS","authors":"Wan Nurul Syafawani Wan Mohd Taufek, Helmi Mohd Hadi Pritam, Wan Nur Syuhaila Mat Desa, D. Ismail","doi":"10.11113/jurnalteknologi.v86.21816","DOIUrl":"https://doi.org/10.11113/jurnalteknologi.v86.21816","url":null,"abstract":"\u0000\u0000\u0000\u0000Handwriting evidence is a valuable source for authorship identification, an important aspect in investigating crimes such as murder, suicide, illegal drug trafficking, kidnapping, and document forgery. It relies heavily on the examination of written characters that make the document. However, specific studies on the handwritten numeral characters are scarce despite being crucial in assisting investigators in solving crimes. Hence, this study is aimed to gauge the possibility to discriminate authors according to their ethnicities by means of their handwritten numeral characters using a novel Geometric Morphometric (GMM) technique. Handwritten numeral characters collected from 30 individuals from three main different ethnic groups in Malaysia; Malay, Chinese and Indian were first digitised and landmarked using GMM software. Cluster patterns can be observed in the Principal Component Analysis (PCA) score plots, belonging exclusively to the three different ethnic groups. Significant differences (p<0.0001) were discovered in handwritten numerals characters 3, 4, 5, 7 and 9 amongst the three ethnicities when tested using Procrustes ANOVA, which signifying that it is possible to discriminate authors according to their ethnicities using their handwritten numeral characters. However, more sophisticated meta-analyses are needed in order to find the most effective technique for determining and discriminating the author's ethnicity.\u0000\u0000\u0000\u0000","PeriodicalId":55763,"journal":{"name":"Jurnal Teknologi","volume":"23 24","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141272938","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

THE INFLUENCE OF FLY ASH ON THE RELATIONSHIP BETWEEN AUTOGENOUS SHRINKAGE AND HYDRATION HEAT IN HIGH-PERFORMANCE CONCRETE 粉煤灰对高性能混凝土自生收缩与水化热之间关系的影响

Jurnal Teknologi Pub Date : 2024-06-02 DOI: 10.11113/jurnalteknologi.v86.21371

C. Niken

{"title":"THE INFLUENCE OF FLY ASH ON THE RELATIONSHIP BETWEEN AUTOGENOUS SHRINKAGE AND HYDRATION HEAT IN HIGH-PERFORMANCE CONCRETE","authors":"C. Niken","doi":"10.11113/jurnalteknologi.v86.21371","DOIUrl":"https://doi.org/10.11113/jurnalteknologi.v86.21371","url":null,"abstract":"Autogenous shrinkage and heat of hydration are causes of premature cracking in HPC. Making high-performance concrete that has no cracks is a challenge. This research looks at the causes of these premature cracks and the impact of fly ash on these cracks. Observations were made on samples measuring 15 cm ´ 15 cm ´ 60 cm, 3 for HPC, and 3 for HPCfa with fc' 60 MPa. HPCfa is HPC where 10% of the binder is fly ash. One embedded strain gauge was installed on each sample at a distance of 5 cm from the sample. After the concrete was poured, the samples were covered with styrofoam for 24 hours and observations were made every 15 minutes. Data from 3 samples were processed using Dixon's criteria. The results showed that fly ash delays the peak heat of hydration by 4 hours, shortening the peak shrinkage duration to 30%, with a shrinkage value of 57% compared to HPC. Slowing down the occurrence of hydration peaks makes the concrete bond stronger so that it is more resistant to withstanding shrinkage peaks. The greatly reduced peak shrinkage duration means that the period of maximum suffering in young concrete is also shorter. The absence of fly ash means that the peak shrinkage does not immediately decrease because there is no osmotic pressure. Fly ash affects a hydration heat pattern similar to autogenous shrinkage (et). Both have a linear relationship Ht = 357216 et + C. The HPC similarity only reaches the peak of hydration.","PeriodicalId":55763,"journal":{"name":"Jurnal Teknologi","volume":"24 15","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141272924","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

ADAPTIVE CONTROL OF A SUBMARINE FOR VARIOUS DIVING DEPTHS USING AN EXPONENTIAL 使用指数算法对潜艇进行自适应控制，以适应不同的下潜深度

Jurnal Teknologi Pub Date : 2024-06-02 DOI: 10.11113/jurnalteknologi.v86.21383

Fawaz F. Al-Bakri, Hasan H. Ali, Salwan Obaid Waheed Khafaji

{"title":"ADAPTIVE CONTROL OF A SUBMARINE FOR VARIOUS DIVING DEPTHS USING AN EXPONENTIAL","authors":"Fawaz F. Al-Bakri, Hasan H. Ali, Salwan Obaid Waheed Khafaji","doi":"10.11113/jurnalteknologi.v86.21383","DOIUrl":"https://doi.org/10.11113/jurnalteknologi.v86.21383","url":null,"abstract":"Due to the progress of deep submergence capabilities, a submarine is extensively employed on many sides of marine science. For that reason, it has become necessary to design an effective submarine position controller while achieving a fast and stable mission. An adaptive analytical scheme for the underwater submarine was developed. The main purpose of the adaptive analytical scheme is to provide a powerful analytical controller that can successfully steer the submarine from the current state under the water to the surface of water in a short time. To achieve that, a seventh-term exponential function was proposed to reshape the reference diving depth while maintaining the control variable limitation and satisfying initial and final boundary conditions. The direct search method with two cascade loops was employed to achieve a minimum cost function by determining an appropriate constant of the function and minimum final time. However, using the direct search method can be time-consuming since a number of algebraic operations are executed inside these two loops. Therefore, the curve fitting method was used to fit the set of direct search method data using power functions. Then, at a certain diving depth, the function coefficients were computed based on the final settling time and function constant using the Gaussian elimination method. A nominal numerical simulation of the submarine’s model was implemented using both adaptive analytical and linear controllers. ","PeriodicalId":55763,"journal":{"name":"Jurnal Teknologi","volume":"9 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141273590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

COMPARATIVE OF RIVEST-SHAMIR-ADLEMAN CRYPTOSYSTEM AND ITS FOUR VARIANTS USING RUNNING TIME AND MEMORY CONSUMPTION ANALYSIS 利用运行时间和内存消耗分析比较里维斯特-沙米尔-阿德尔曼密码系统及其四种变体

Jurnal Teknologi Pub Date : 2024-06-02 DOI: 10.11113/jurnalteknologi.v86.20723

A. Mandangan, M. Asbullah, Syed Farid Syed Adnan, Mohammad Andri Budiman

{"title":"COMPARATIVE OF RIVEST-SHAMIR-ADLEMAN CRYPTOSYSTEM AND ITS FOUR VARIANTS USING RUNNING TIME AND MEMORY CONSUMPTION ANALYSIS","authors":"A. Mandangan, M. Asbullah, Syed Farid Syed Adnan, Mohammad Andri Budiman","doi":"10.11113/jurnalteknologi.v86.20723","DOIUrl":"https://doi.org/10.11113/jurnalteknologi.v86.20723","url":null,"abstract":"The Rivest-Shamir-Adleman (RSA) algorithm, known for its slow single-precision multiplication (spm) and overall running time, is not commonly employed to encrypt user data directly. As a result, several researchers have developed various RSA-based cryptosystems to enhance the algorithm's performance while maintaining security. This paper presents a comparative analysis of different variants of the RSA cryptosystem, focusing on five specific cryptosystems: RSA, Somsuk-RSA, Modified-RSA (MRSA), Easy Simple Factoring-RSA (ESF-RSA), and Phony-RSA. The methodology involves evaluating the theoretical running time and memory usage through single-precision multiplication (spm) measurements, while the actual running time is estimated using Maple programming. The research has two primary objectives. Firstly, they examined each algorithm of the RSA variants and analysed them according to the proposed methodology. Secondly, to determine which cryptosystem consumes the most time and memory for key generation, encryption, and decryption. The results indicate that ESF-RSA and RSA are the fastest in terms of key generation, ESF-RSA is the quickest for encryption, and Phony-RSA excels in decryption speed. Additionally, ESF-RSA demonstrates the lowest memory usage, whereas MRSA requires the highest memory allocation for all processes.","PeriodicalId":55763,"journal":{"name":"Jurnal Teknologi","volume":"26 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141273291","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

THE EFFECT OF NUTRITIONAL STATUS AND TNF ALPHA TO LUNG FUNCTION ON MARBLE CRAFTSMAN 营养状况和 tnf alpha 对大理石工匠肺功能的影响

Jurnal Teknologi Pub Date : 2024-06-02 DOI: 10.11113/jurnalteknologi.v86.21390

N. Widajati, Nisrina Tiara, Tri Martiana, Saliza Mohd Elias, Y. Priyandani

{"title":"THE EFFECT OF NUTRITIONAL STATUS AND TNF ALPHA TO LUNG FUNCTION ON MARBLE CRAFTSMAN","authors":"N. Widajati, Nisrina Tiara, Tri Martiana, Saliza Mohd Elias, Y. Priyandani","doi":"10.11113/jurnalteknologi.v86.21390","DOIUrl":"https://doi.org/10.11113/jurnalteknologi.v86.21390","url":null,"abstract":"Marble craftsmen are potentially exposed to marble dust which contains about 60% silica resulting in marble craftsmen facing this hazard and possibly physiological lung disorders. In addition, this hazard will increase Tumor Necrosis Factor-a (TNF- α) levels. This study aims to analyze the effect of working period, nutritional status, and TNF-α on physiological lung disorders. study is a quantitative study with observational research type and cross sectional research design In this study, the data collection techniques used were: (1) measurement of personal river stone dust levels using a personal dust sampler of CCZG2A type; (2) measurement of serum TNF-α levels using the ELISA technique, (3) examination of lung function with MIR spirolab III; (4) collection of data on respiratory complaints using the ATS standard questionnaire as well as to obtain data on age, tenure, length of work and smoking habits; (5) measurement of nutritional status by weighing body weight and measuring height. The data obtained were then presented in the form of tables, narratives, analyzed using statistical programs. The subjects of this study were all marble craftsmen who worked in the marble household industry in Tulungagung Regency as many as 30 people with the number of samples taken as many as 26 craftsmen. The average value of %FVC in obese respondents was lower than that of respondents with normal nutritional status. This indicates a decrease in lung function conditions in obese workers. ","PeriodicalId":55763,"journal":{"name":"Jurnal Teknologi","volume":"48 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141274026","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0