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Widodo R.B.,Kyushu Institute of Technology | Widodo R.B.,Ma Chung University | Wada C.,Kyushu Institute of Technology
Journal of Advanced Computational Intelligence and Intelligent Informatics | Year: 2017

Step-length measurement as a spatial gait parameter is useful for the physician and physical therapist for determining the patient's gait condition. We hypothesized that this could be determined using ultrasonic sensors mounted on a shoe-type measurement device. For that purpose, we have developed a shoe-type measurement device to measure gait parameters. Our system was found to effectively measure step-length and pressure distribution. However, we found that the presence of shoes leads to perishable and fragile conditions for the sensors. Therefore, we redesigned the number, angle, and range of the ultrasonic sensors mounted on the shoes in order to clarify and improve the step-length prediction. This paper discusses the improvement of a shoe-type measurement device from the implementation with real shoes and the steplength prediction using an artificial neural network (ANN). The results of the experiment show that the number, angle, and positioning of ultrasonic sensors affect their ability to capture the human step region, that is, 5070 cm under the experimental condition of foot progression angle up to 30 degrees. The results of the predictive performance of step-length using the proposed ANN architecture demonstrate an improvement.


Siah W.R.,University of Technology Malaysia | Lintang H.O.,University of Technology Malaysia | Lintang H.O.,Ma Chung University | Yuliati L.,University of Technology Malaysia | Yuliati L.,Ma Chung University
Catalysis Science and Technology | Year: 2017

Series of lanthanum-modified TiO2 catalysts were prepared by a UV photodeposition method to exclude any heat treatments that may affect the properties and photocatalytic activity of TiO2. Results showed that the lanthanum modification did not significantly affect the properties of TiO2, but increased the formation of Ti3+. Under UV light irradiation, the activity for 2,4-D decomposition rose by a maximum factor of 5.5 when TiO2 was loaded with 5 mol% La; further increase of La deposition led to a decrease in photocatalytic activity. From the electrochemical impedance and photocurrent results, it was shown that the positive influence of La on TiO2 photocatalytic activity was caused by the increased charge separation in the TiO2 photocatalysts, owing to the additional formation of Ti3+ states. On the other hand, when tested with the colourless 2,4-D model pollutant under visible and solar simulator irradiation, the presence of lanthanum species did not improve the photocatalytic activity of TiO2 significantly. Hence, it was shown that lanthanum species only improved the UV photocatalytic activity of TiO2. © The Royal Society of Chemistry 2017.


Luer L.,Madrid Institute for Advanced Studies | Moulisova V.,University of Glasgow | Henry S.,University of Glasgow | Polli D.,National Research Council Italy | And 10 more authors.
Proceedings of the National Academy of Sciences of the United States of America | Year: 2012

Energy transfer (ET) between B850 and B875 molecules in light harvesting complexes LH2 and LH1/RC (reaction center) complexes has been investigated in membranes of Rhodopseudomonas palustris grown under high- and low-light conditions. In these bacteria, illumination intensity during growth strongly affects the type of LH2 complexes synthesized, their optical spectra, and their amount of energetic disorder. We used a specially built femtosecond spectrometer, combining tunable narrowband pump with broadband white-light probe pulses, together with an analytical method based on derivative spectroscopy for disentangling the congested transient absorption spectra of LH1 and LH2 complexes. This procedure allows real-time tracking of the forward (LH2 → LH1) and backward (LH2 ← LH1) ET processes and unambiguous determination of the corresponding rate constants. In low-light grown samples, we measured lower ET rates in both directions with respect to high-light ones, which is explained by reduced spectral overlap between B850 and B875 due to partial redistribution of oscillator strength into a higher energetic exciton transition. We find that the low-light adaptation in R. palustris leads to a reduced elementary backward ET rate, in accordance with the low probability of two simultaneous excitations reaching the same LH1/RC complex under weak illumination. Our study suggests that backward ET is not just an inevitable consequence of vectorial ET with small energetic offsets, but is in fact actively managed by photosynthetic bacteria.


Ekawati Y.,Ma Chung University | Noya S.,Ma Chung University | Widjaja F.,Ma Chung University
AIP Conference Proceedings | Year: 2017

Carrot products are rarely available in the market. Based on previous research that had been done using QFD to generate product design of carrots products, the research to produce the process quality planning had been carried out. The carrot product studied was carrot syrup. The research resulted in a process planning matrix for carrot syrup. The matrix gives information about critical process plan and the priority of the critical process plan. The critical process plan on the production process of carrot syrup consists of carrots sorting, carrots peeling, carrots washing, blanching process, carrots cutting, the making of pureed carrots, filtering carrot juice, the addition of sugar in carrot juice, the addition of food additives in carrot juice, syrup boiling, syrup filtering, syrup filling into the bottle, the bottle closure and cooling. The information will help the design of the production process of carrot syrup. © 2017 Author(s).


Prilianti K.R.,Ma Chung University | Callista P.B.,Ma Chung University | Setiawan H.,Ma Chung University
AIP Conference Proceedings | Year: 2017

Type 2 diabetes mellitus is a disease that occurs because the body lacks of insulin or the insulin produced by the pancreas cannot work effectively such that the glucose level in the blood cannot well controlled. One of the most common causes of diabetes mellitus type 2 is obesity, therefore this disease can be controlled with the appropriate diet regarding to the daily calorie requirement. Hence, the level of blood glucose is maintained. Unfortunately, because the lack of proper diet education and facility, many people cannot work on proper daily healthy diet by their own. In this research Artificial Immune System algorithm was applied to build a model that help diabetes mellitus patient arrange their meal plans. The model can calculate the amount of daily calorie needed and arrange the appropriate daily meal plans based on it. The meal plans vary according to the patient calorie needs. The required input data are age, gender, weight, height, and type of patient daily main activity. The experiments show that this model has a good result. The result is already approaching the patients' daily calorie need, i.e. 97.6% (actual need is not less than 80% and not greater than 100%). Carbohydrate of the meal plan is 55-57% (actual need is not less than 45% and not greater than 60%) whereas the protein approximate 15-18% (actual need is not less than 15% and not greater than 20%) and fat of approximate 22-24% (actual need is not less than 20% and not greater than 25%). © 2017 Author(s).


A money's nominal value recognition system has been developed using Artificial Neural Network (ANN). ANN with Back Propagation has one disadvantage. The learning process is very slow (or never reach the target) in the case of large number of iteration, weight and samples. One way to speed up the learning process is using Quickprop method. Quickprop method is based on Newton's method and able to speed up the learning process by assuming that the weight adjustment (E) is a parabolic function. The goal is to minimize the error gradient (E'). In our system, we use 5 types of money's nominal value, i.e. 1,000 IDR, 2,000 IDR, 5,000 IDR, 10,000 IDR and 50,000 IDR. One of the surface of each nominal were scanned and digitally processed. There are 40 patterns to be used as training set in ANN system. The effectiveness of Quickprop method in the ANN system was validated by 2 factors, (1) number of iterations required to reach error below 0.1; and (2) the accuracy to predict nominal values based on the input. Our results shows that the use of Quickprop method is successfully reduce the learning process compared to Back Propagation method. For 40 input patterns, Quickprop method successfully reached error below 0.1 for only 20 iterations, while Back Propagation method required 2000 iterations. The prediction accuracy for both method is higher than 90%. © 2017 Author(s).


Czechowski N.,Nicolaus Copernicus University | Nyga P.,Military University of Technology | Schmidt M.K.,Nicolaus Copernicus University | Brotosudarmo T.H.P.,Ma Chung University | And 3 more authors.
Plasmonics | Year: 2012

We report on experimental and theoretical studies of plasmon-induced effects in a hybrid nanostructure composed of light-harvesting complexes and metallic nanoparticles in the form of semicontinuous silver film. The results of continuous-wave and time-resolved spectroscopy indicate that absorption of the light-harvesting complexes is strongly enhanced upon coupling with the metallic film spaced by 25 nm of a dielectric silica layer. This conclusion is corroborated by modeling, which confirms the morphology of the silver island film. © 2011 The Author(s).


Swastika W.,Ma Chung University | Haneishi H.,Chiba University
Telkomnika | Year: 2012

The use of circulant matrix as the sensing matrix in compressed sensing (CS) scheme has recently been proposed to overcome the limitation of random or partial Fourier matrices. Aside from reducing computational complexity, the use of circulant matrix for magnetic resonance (MR) image offers the feasibility in hardware implementations. This paper presents the simulation of compressed sensing for thoracic MR imaging with circulant matrix as the sensing matrix. The comparisons of reconstruction of three different type MR images using circulant matrix are investigated in term of number of samples, number of iteration and signal to noise ratio (SNR). The simulation results showed that circulant matrix works efficiently for encoding the MR image of respiratory organ, especially for smooth and sparse image in spatial domain. © 2012 Universitas Ahmad Dahlan.


Bujak L.,Nicolaus Copernicus University | Czechowski N.,Nicolaus Copernicus University | Piatkowski D.,Nicolaus Copernicus University | Litvin R.,Nicolaus Copernicus University | And 5 more authors.
Applied Physics Letters | Year: 2011

The influence of plasmon excitations in spherical gold nanoparticles on the optical properties of a light-harvesting complex 2 (LH2) from the purple bacteria Rhodopseudomonas palustris has been studied. Systematic analysis is facilitated by controlling the thickness of a silica layer between Au nanoparticles and LH2 complexes. Fluorescence of LH2 complexes features substantial increase when these complexes are separated by 12 nm from the gold nanoparticles. At shorter distances, non-radiative quenching leads to a decrease of fluorescence emission. The enhancement of fluorescence originates predominantly from an increase of absorption of pigments comprising the LH2 complex. © 2011 American Institute of Physics.


Ekawati Y.,Ma Chung University | Bazarado M.,Ma Chung University
ARPN Journal of Engineering and Applied Sciences | Year: 2016

Carrots are healthy vegetables but this agricultural products have low value when they are sold as a raw commodity. To become value-added agricultural products, the value of raw carrots have to be increased through the addition of ingredients or processes that make them more attractive to the buyer. Increasing the added value of the carrots requires the development of food products that considering the voice of the customer. The aim of the research was to design food products based on carrots desired by the customer. The development of product design used Quality Function Deployment (QFD) method especially the product design phase. Candied carrot and carrot syrup were the products had been found in the previous research conducted to find the carrot based products most wanted by the customers. The research had developed the House of Quality matrix, whose technical requirements were used to develop product design matrix in this research. The product design of the two products were developed using QFD with two different developments, one for the product and one for the package. All of the critical parts resulted in this research, although each of them has different priorities, were important to develop the new products. © 2006-2016 Asian Research Publishing Network (ARPN).

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