Padang, Indonesia

Bung Hatta University

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Padang, Indonesia
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This study aims to assess the modern science culture from the scientific thinking skills, habits of thinking sciences and its contributions to the culture of indigenous among high school students of West Sumatra. The analysis was done by descriptive data and inference analysis by using one-way univariat test and linear regression analysis. The results showed that the scientific thinking skills students are at high stage and the habit of scientific thinking of them are at high stage too. The analysis of one-way univariat test showed there is no significant difference on the confidence level of 95% (F 2, 448 = 0.354, p = 0.702) in terms of the scientific thinking skills among high school students based on location of residence, and there is no significant difference on the 95% confidence level (F 2, 448 = 1,116, p = 0.328) in term of the scientifically thinking habit among high school students based on location of residence. The linear regression analysis showed that both independent variable those are culture of modern science variable of students from their scientifically thinking skills and habits, both variables give significant influence on the indigenous science culture about 3.7%. The high variable that contribute to the culture of indigenous science that is the ability to scientifically thinking skills 3.0% and the habits of scientifically thinking 0.7%. The implications of this research are necessary coaching and developing the modern scientific thinking in the high-school student's level through qualified learning science. Therefore, providing the facilities of learning and improving the quality of teachers should receive high attention. © Medwell Journals, 2016.


Eriawan T.,Bung Hatta University
IOP Conference Series: Earth and Environmental Science | Year: 2017

Padang is a metropolitan city which has 40 units of open space like plansum park, playground, and sports park with 10,88 hectar of total area. These open spaces are publics', but not all of them are able to use as active public open spaces it caused by some of the parks are dormant parks beacuse they only for planted ground not for public activites.This study conducted to assess the quality of public space that exsist in Padang; Imam Bonjol park (representing of city open space (go-green)), H. Agus Salim sport center ( representing of sports park) and Pantai Muaro Padang area (representing of recreation/tourism).The method of this research conducted in several stages, first was the identification toward space's function (Carmona,2008) and assess the space utilization index based approach to public space index (Metha,2007). The spaced quality is measured based on variable in Good Public Space Index which is the intensity of use, social activities, duration of activities, variation and pattern of use. The urgency of this research related to the effort to evaluate the policy of space arrangement and space control through the assessment of the use of existed spaces, until it can be references to Padang goverment in improving and increasing the quality of space thorugh development of spaces that have high quality.The assesment of quality of public open spaces in Padang conducted by assessed five space quality variables, result of analysis, utilization of public space was 0.69. based on the result it can be concluded the quality of public space in some parks in Padang has moderate index quality. This is caused by the time differentiation of the society, there is no interaction among society, and short time duration of the society in visiting the public space. © Published under licence by IOP Publishing Ltd.


Utama L.,Bung Hatta University | Yamin M.,Bung Hatta University
IOP Conference Series: Earth and Environmental Science | Year: 2017

Floods is flooding of effect of exit water groove river because big river debit sudden its accomodation energy, happened swiftly knock over areas which is debasement, in river basin and hollow. Flow debris or which is recognized with galodo have knock over river of Kuranji year 2012 in Padang city. Area is floods disaster are: 19 Sub-District in 7 district, and hard that is district of Pauh and district of Nanggalo. Governmental claim tired loss of Rp 263,9 Billion while Government of Provinsi West Sumatera appraise loss estimated by Fourty Billion Rupiah (Padang Ekspress 28 July 2012), with detail of damage house counted 878 unit, damage religious service house 15 unit, damage irrigation 12 unit, damage bridge 6 unit, damage school 2 unit, damage health post 1 unit. Result of calculation, by using rainfall of year 2003 until year 2015 with method Gumbel, Hasper and Wedwen, got high rainfall plan is 310,00 mm, and method Melchior and Hasper floods is 1125,86 m3 / second. From result of study analyse at Citra map of correlation and image to parameters cause of floods, and use software Watershed Modelling System (WMS) this region have two class that is middle susceptance and low susceptance. Middle susceptance area is there are in middle river and downstream river, with inclination level off. Low susceptance area there is middle river. Area which have potency result the happening of floods is headwaters, because having keen ramp storey level ( 45 - 55%) and is hilly. For the mitigasi of floods disaster determined by three area evacuate that are: Sub-District Of Kelurahan Limau Manis District Of Pauh, Sub-District Of Surau Gadang District Of Nanggalo, and Sub-District Of Lambung Bukik District of Pauh, in the form of map. © Published under licence by IOP Publishing Ltd.


Yusra,Bung Hatta University | Efendi Y.,Bung Hatta University
Pakistan Journal of Nutrition | Year: 2017

Background and Objective: The Bacillus cereus strain HVR22 bacteria was obtained from isolated budu which produces bacteriocins. The aim of this study was to analyze the effect of crude bacteriocins on pathogen bacteria to observe the effect on cellular morphology of Escherichia coli using electron microscopy and to evaluate its effect on fish fillets. Materials and Methods: A diffusion method was used to measure the width of the clear zone made by Escherichia coli. Antimicrobial solutions of the Bacillus cereus strain HVR22 microbes were used to soak the snapper fillets, bacterial counts were performed on day 0 and 7. Results: Changes in E. coli membrane cell structure were observed under Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM) after 48 h. Membranes were exposed to antimicrobial compounds from the Bacillus cereus strain HVR22. Antimicrobials produced by the Bacillus cereu strain HVR22 inhibited E. coli and Salmonella sp., growth on day 0 and 7. Conclusion: The bacteriocin-producing Bacillus cereus strain HVR22 could be used as a natural preservative for fish products. © 2017 Yusra and Yempita Efendi.


Eriawan T.,Bung Hatta University | Setiawati L.,Bung Hatta University
AIP Conference Proceedings | Year: 2017

Padang City as a big city with a population approaching one million people has to address the issue of increased activities of the population and increased need for land and space for those activities. One of the effects of population growth and the development of activities in Padang is the decreasing number of open spaces for the outdoor public activities, both the natural and artificial public. However, Padang City has several open spaces that are built and managed by the government including 40 units of open spaces in the form of plansum parks, playgrounds, and sports parks, with a total area of 10.88 hectares. Despite their status as public open spaces, not all of them can be used and enjoyed by the public since most of them are passive parks, in which they are made only as a garden without any indulgences. This study was performed to assess the quality of public spaces in the central business of Padang City, namely Imam Bonjol Park (Taman Imam Bonjol). The methods of this study were done through several stages, which were to identify the typology of function space based on [1] Carmona (2008) and to assess the space utilization index based on the approach of Public Space Index according to Mehta [2] (2007). The purpose of this study was to assess the quality of space which is a public space in Padang City. The space quality was measured based on the variables in Good Public Space Index, the intensity of use, the intensity of social activity, the duration of activity, the variations in usage, and the diversity of use. The rate of the index of public space quality at Taman Imam Bonjol was determined by assessing 5 (five) variables of space quality. Based on the results of the analysis, public space utilization index was equal to 0.696. This result could be used to determine the quality of public space, in this case was Imam Bonjol Park was in Medium category. The parameters indicated several results including the lack of diversity in users' activity time, less formation of social interaction between users, and the relatively short average of visitors' duration in exploiting public space. © 2017 Author(s).


Desmiarti R.,Bung Hatta University | Li F.-S.,Gifu University
ITB Journal of Engineering Science | Year: 2011

The sorption and the degradation capacity of natural estrogens in freshwater environmental system in Japan were performed. Batch experiments were examined in water-sediment suspensions using six layers of sediment under aerobic and anaerobic conditions. The results indicated that the water-sediment partition coefficient of E1 (K d E1) was higher than E2 (K d E2). The degradation rate of E1 (k E1) was smaller than E2 (k E2). Under aerobic and anaerobic conditions, E1 was formed from E2. The degradation rate of E2 (k E2) from the surface to bottom of sediment layers was estimated fell in the range from 0.114 to 0.026 h -1 and 0.05 to 0.014 h -1 under aerobic and anaerobic conditions, respectively.


The aim of this study was to analyze the teachers' understanding on the concept of limits and derivative and the way they deliver the subjects to their students. The study was divided into two main phases during two years of research. This research was conducted in 7 high schools vary from general, Islamic and occasional schools. The participants of the study were 20 in-service mathematics teachers from 7 high schools. Questioners were given to find out how teachers' understanding on the concepts and how they organized their class. The teachers' level of complexity on the subject was analyzed by Structure of the Observed Learning Outcome (SOLO) Taxonomy, and teachers' class organizations was analyzed by assessing and classifying their responds written on the questioner sheets and discussion with the selected participants. Based on the data, it can be figured out that the most teachers' position were on third level out of five level of SOLO Taxonomy. Data also told us that half of the teachers experienced the difficulties in teaching the concept due to their limitations on mastering subject. Data also showed that there is a relevance between teachers' level of understanding and teachers' ability in delivering subject to their students. © Published under licence by IOP Publishing Ltd.


Desmiarti R.,Bung Hatta University | Li J.,Gifu University | Li F.,Gifu University
Water, Air, and Soil Pollution | Year: 2012

The behavior of estrone (E1) and 17β-estradiol (E2) in relatively closed water environment was studied by continuous flow experiment using sediments from a freshwater reservoir. For this, four sediment columns (two oxic ones and two anoxic ones) were employed, which were structured by packing 30 cm of undisturbed sediment and 60 cm of overlying water collected from two sites within a reservoir. A mass balance model that considered the influent flux, the effluent flux, mass transfer, sorption, and biodegradation was proposed to describe the behavior of E2 and E1 in the columns. The results indicated that the water-sediment partition coefficient of E1 (K E1 d) was higher than E2 (K E2 d). The degradation rate of E1 (k E1) was smaller than E2 (k E2). Under both oxic and anoxic conditions, E1 was formed from E2. Furthermore, to clarify the impact of the model parameters such as the hydraulic retention time (HRT), K d, and k on the behavior of E2 and E1, variance analysis was performed based on the results of model simulations. The results showed that the concentrations of E2 and E1 in the column effluent were controlled most significantly by the sorption capacity of the natural estrogens onto sediment particles, with the determined contributory ratios changing in the order of sorption > HRT > degradation. © Springer Science+Business Media B.V. 2012.


Suherman H.,National University of Malaysia | Suherman H.,Bung Hatta University | Sulong A.B.,National University of Malaysia | Sahari J.,National University of Malaysia
Ceramics International | Year: 2013

The main challenges for commercialization of a single-filler graphite (G) polymer-matrix composite as bipolar plates are its low electrical conductivity and flexural strength. The minimum requirements set by the US Department of Energy (DOE) are the electrical conductivity and flexural strength to be greater than 100 S/cm and 25 MPa, respectively. In this study, the electrical conductivity of a G/epoxy (EP) composite (single filler) is only 50 S/cm (in-plane conductivity) at 80 wt% G. However, flexural strength is greater than 25 MPa. Using carbon nanotubes (CNTs) as the second filler at a concentration of 5 wt% in a CNTs/G/EP nanocomposite resulted in the in-plane and through-plane electrical conductivity and flexural strength being 180 S/cm, 75 S/cm, and 45 MPa, respectively. The density of the CNTs/G/EP nanocomposite is also less than that of G/EP composite, which demonstrates that a total weight reduction is achievable. © 2012 Elsevier Ltd and Techna Group S.r.l.


Suherman H.,National University of Malaysia | Suherman H.,Bung Hatta University | Sahari J.,National University of Malaysia | Sulong A.B.,National University of Malaysia
Ceramics International | Year: 2013

This paper focused on using a conductive polymer composite (CPC) as a potential replacement for the conventional graphite bipolar plate used in polymer electrolyte membrane fuel cells (PEMFC). Based on the requirements established by the US Department of Energy (DOE), the in-plane electrical conductivity and flexural strength are required to be greater than 100 S/cm and 25 MPa, respectively. The high filler loading is needed to satisfy the high in-plane electrical conductivity. However, the high filler loading reduces the flexural strength and manufacturability of the composite. In this study, the composites were prepared by compounding using an internal mixer followed by compression moulding. The combination of 10 vol% carbon black (CB) as the second filler with synthetic graphite/epoxy (SG/EP) resulted in the following composite properties: 150 S/cm (in-plane conductivity), 55 S/cm (through-plane conductivity), and 38.8 MPa (flexural strength). Used as the second filler, the CB, which had a small-sized diameter, formed conductive networks that filled the voids between the SG and polymer matrix. The in-plane electrical conductivity and flexural strength of the CB/SG/EP composites at the optimum composition exceeded the requirement for bipolar plate applications. © 2013 Elsevier Ltd and Techna Group S.r.l.

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