Surakarta, Indonesia

Sebelas Maret University
Surakarta, Indonesia

Sebelas Maret University is an Indonesian public university in the suburban area of Surakarta, Central Java, Indonesia. It is colloquially known as UNS or UNS Solo. Wikipedia.

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Budiyanto C.,Sebelas Maret University
IOP Conference Series: Materials Science and Engineering | Year: 2017

The success of an artificial insemination of cattle depends on the accuracy of timing of semen injection within a certain duration of time during the estrus phase of the female cattle. Contemporary practice in traditional cattle reproductive system relies on the visual observation of estrus indicators. This paper proposes for the design of a Decision Support System assisting the determination of semen injection to post-partum female cattle. The system would suggest the time frame for injection treatments, the distance of the location from the centre point, and the best route of the treatments for multiple locations based on the shortest route path algorithm. The paper concludes with the potential contributions of such system for the development of Precision Livestock Farming and rural farmers' prosperity. © Published under licence by IOP Publishing Ltd.

Sangadji S.,Sebelas Maret University
Procedia Engineering | Year: 2017

Concrete is quasi-brittle material susceptible to cracking under tensile or shear stress. In case of continuous network of crack is formed, concrete structure becomes permeable and embedded rebar may be exposed to ambient air, hence escalating the risk of material degradation. On the other side, concrete infrastructures industry is facing pressing sustainability issues. Concrete production consumes high amount of energy and produces large amount of C02 emission. The scale of the problem is even greater in the event of many concrete structure premature failure which consumes more raw material for rebuilding. Designing new infrastructures for longer service life by improving concrete (materials and structure) durability is one solution to overcome the dilemma. One promising concept is by incorporating self-healing mechanism found in nature into cement-based materials / concrete structural element. This paper presents inherent autogeneous healing which occur due to its heterogeneous nature of concrete. This contribution also demonstrates some laboratory proven bio-inspired techniques that makes concrete materials and/or structural element self-healing autonomously. It involved diverse methods across several categories. The methods designed have demonstrated to have a good prospect in making concrete structural element self-healing. Finally the paper concludes with the claim that If unavoidable cracks due to inherent brittleness in concrete could be self- sealed/healed/repaired, concrete structure will certainly serve longer service life, making it more durable, therefore sustainable. © 2017 The Authors. Published by Elsevier Ltd.

Handayani F.S.,Sebelas Maret University
Procedia Engineering | Year: 2017

In facing current pressing sustainable issues and ASEAN Economic Community (AEC) where construction sector is on so-called 'free competition', national private construction industry players, i.e. consulting firms and contractors, must enhance their performance in order to improve their service, compete, and gain advantage. These players must apply the concept of strategic management in which environmental analysis and strategic alternative decision stage is involved. This study identifies the prevailing problems encountered by the Indonesian contractors firms. The case study focused on and collected data from small to medium contractors in Central Java. Data were analyzed and strategic decisions were formulated based on current baseline. The appropriate strategic alternatives for small contractor were market development by maintaining clients' trust, improving the human resources through certification, and implementing effective and efficient construction methods which minimize waste. For medium contractors, the attractive market development can be attained by optimizing the role of enterprise organizations, building teamwork, improving the control system, applying sustainable construction via efficient construction method. © 2017 The Authors.

This study aimed to produce a model of scientific attitude assessment in terms of the observations for physics learning based scientific approach (case study of dynamic fluid topic in high school). Development of instruments in this study adaptation of the Plomp model, the procedure includes the initial investigation, design, construction, testing, evaluation and revision. The test is done in Surakarta, so that the data obtained are analyzed using Aiken formula to determine the validity of the content of the instrument, Cronbach's alpha to determine the reliability of the instrument, and construct validity using confirmatory factor analysis with LISREL 8.50 program. The results of this research were conceptual models, instruments and guidelines on scientific attitudes assessment by observation. The construct assessment instruments include components of curiosity, objectivity, suspended judgment, open-mindedness, honesty and perseverance. The construct validity of instruments has been qualified (rated load factor > 0.3). The reliability of the model is quite good with the Alpha value 0.899 (> 0.7). The test showed that the model fits the theoretical models are supported by empirical data, namely p-value 0.315 (≥ 0.05), RMSEA 0.027 (≤ 0.08) © Published under licence by IOP Publishing Ltd.

Purnomo J.S.,Sebelas Maret University
Journal of Physics: Conference Series | Year: 2017

Wonogiri is a region of south eastern part of Central Java province which borders with East Java and Yogyakarta Province. In Physiographic its mostly undulating hills so that the frequent occurrence of landslides, especially during the rainy season. Landslide disaster that just happened that on the road segment Purwantoro-Nawangan / Bts Jatim Km 89 + 400 were included in the authority of the Highways Department of Central Java Province. During this time, Error analysis of slope stability is not caused by a lot of presumption shape of slip surface, but by an error in determining the location of the critical slip surface. This study aims to find the shape and location slip surface landslide on segment Purwantoro - Nawangan Km 89 + 400 with the interpretation of soil test results. This research method is with the interpretation of CPT test and Bore Hole as well as modeling use limit equilibrium method and finite element method. Processing contours of the slopes in the landslide area resulted in three cross section that slopes A-A, B-B and C-C which will be modeling the slopes. Modeling slopes with dry and wet conditions at the third cross section slope. It was found that the form of the slope slip surface are known to be composite depth 1.5-2 m with safety factor values more than 1.2 (stable) when conditions are dry slopes. But its became failure with factor of safety < 0.44 when conditions are wet slopes. © Published under licence by IOP Publishing Ltd.

Wahyulianti,Sebelas Maret University
Journal of Physics: Conference Series | Year: 2017

The solutions of the D-dimensional Schrodinger equation was solved by using Wavefunction Ansatz method. We used the form of potential as V(r) = ar-6+br-5+cr-4+dr-3+ er-2+fr-1 . The D-dimensional Schrodinger equation was separated to radial part and angular part. The radial part of D-dimensional Schrodinger equation solved using Wavefunction Ansatz method. We obtained the energy equation and the radial wavefunctions. © Published under licence by IOP Publishing Ltd.

Roswitha M.,Sebelas Maret University | Baskoro E.T.,Bandung Institute of Technology
AIP Conference Proceedings | Year: 2012

For a graph G(V,E), an edge-covering of G is a family of different subgraphs H 1,..H k such that any edge of E belongs to at least one of the subgraphs H i, 1 ≤ i ≤ k. If every H i is isomorphic to a given graph H, then G admits an H-covering. Graph G is said to be H-magic if G has an H-covering and there is a total labeling f:V∪E→1,2,..V+E such that for each subgraph H′ = (V′,E′) of G isomorphic to H,ΣνV′f(ν) +ΣeE′f(e) is fixed constant. Furthermore, if f(V)=1,2,..V then G is called H-supermagic. The sum of all vertex and edge labels on H, under a labeling f, is denoted by Σf(H). In this paper we study H-supermagic labeling for some classes of trees such as a double star, a caterpillar, a firecracker and a banana tree. © 2012 American Institute of Physics.

Setyawan A.,Sebelas Maret University
Procedia Engineering | Year: 2013

Semi-flexible pavements are manufactured by producing a very open porous asphalt skeleton and filling the voids with selected cementitious grouts. The resultant composites, referred to as "grouted macadams", combine the flexibility of the bituminous component with the strength and rigidity of the cementitious component. Grouted macadams thus combine the best qualities of concrete and asphalt pavements, namely the flexibility and freedom from joints that characterize asphalt and the high static bearing capacity and wear resistance of concrete. The properties of the grouted macadam composites were assessed using a range of engineering, compressive strength is the most common strength test for rigid pavements since it is relatively easy to conduct compared to other tests and numerous correlations exist to predict other material properties based on compressive strength values Since semi-flexible pavements possess mechanical properties in between bituminous mixtures and concrete, the compressive properties of the grouted macadams designed in this study have been investigated. The unique correlations between each component, namely asphalt skeleton, grout, aggregate type and size were established also the comparison to the other type of investigations and conventional concrete. © 2013 The Authors.

Purwanto B.,Sebelas Maret University
Acta medica Indonesiana | Year: 2012

to determine the effect of oral N-acetylcysteine (NAC) on plasma levels of inflammatory markers in Continuous Ambulatory Peritoneal Dialysis (CAPD) patients. we performed a placebo-controlled study over 8 weeks in 32 patients on regular CAPD. The patients were divided into 2 groups of 16 patients matched for age and gender. The first group was given NAC 2x600 mg/day for 8 weeks and inflammatory parameter was compared with control group. The immune system is determined from the average levels of Procalcitonin, IL-6, IL-1, C3, SICAM, hsCRP, and TNF- before and after treatment with NAC. Student t-test was performed to compare the means between NAC receiving and control groups. All statistics were done using SPSS software (SPSS Ver 16.0). administration of NAC, significantly diminished PCT (-0.38±0.57 vs 0.09±0.14; p=0.004), IL-6 (-1.94±3.03 vs 1.19±1.99; p=0.002), IL-1 (-0.14±0.21 vs 0.01±0.04; p=0.010), C3 (-7.40±12.04 vs 4.60±8.12; p=0.002), sICAM (-80.59±29.18 vs -35.02±46.99; p=0.007), hsCRP (-1.50±1.32 vs 0.81±1.17; p<0.001) and TNF- (-0.73±0.47 vs 0.14±0.74; p<0.001) levels compared control to group. short-term oral NAC treatment resulted in reduction of circulating PCT, IL-6, IL-1, C3, sICAM, hsCRP, and TNF- in CAPD patients.

Saraswati T.E.,University of Shizuoka | Saraswati T.E.,Sebelas Maret University | Ogino A.,University of Shizuoka | Nagatsu M.,University of Shizuoka
Carbon | Year: 2012

We describe the amino group surface functionalisation of graphite-encapsulated iron compound nanoparticles by radio frequency (RF) plasma processing followed by oxidized dextran immobilization. We have found that surface treatment using plasma represents an important step before biomolecules immobilization. After plasma treatment, the dispersion property of nanoparticles in dextran solution in water was significantly improved. The successful dextran immobilization was confirmed by X-ray photoelectron spectroscopy (XPS) and high resolution-transmission electron microscopy (HR-TEM) analyses followed by amino group derivatization using 4-(trifluoromethyl)-benzaldehyde (TFBA). As an evidence for covalent bonding between nanoparticles and dextran, the area percentage of deconvoluted CN peak at ∼389.6 eV increased from 0% to 10.53 ± 1.30% with increasing the dextran concentration. The result is consistent with the evidenced decreasing of the free amino group percentage from 68.09 ± 5.10% to 14.73 ± 5.89% on the nanoparticle surface after dextran immobilization. © 2011 Elsevier Ltd. All rights reserved.

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