1,724,085 research outputs found
Tribute to Duchamp / Ramlan Abdullah
Full text linkRamlan works in a gamut of assorted materials such as metal, stainless steel, copper, and galvanised steel. Copper is somehow sparingly used in Ramlan’s public sculptures, which may hint as a break with the past. His works are often monolithic, as a concatenation of different materials, combining the naturally found or mediated as carved / chiseled/shaped entities. Geometric design in islamic art suggests a remarkable degree of freedom. The complex arrangements and combinations of elements are infinitely expandable. Geometric figure of the circle represents the primordial symbol of unity and the ultimate source of all diversity in creation. The natural division of the circle into regular divisions is the ritual starting point for many traditional Islamic patterns. Aesthetics of Islamicity on the twin stanchions of Beauty and Perfection follow a line of grace, symmetry, harmony, unity, repetition, modulation, peace, proportion, the play of Nur light and refractions. At times, his works play out on another level, acting like a silent ‘doa’ (prayer), in transcending the Tauhid (Oneness with God), and in manifesting the omnipresence of God
Effects of non-linear stiffness on performance of an energy harvesting device
No full textVibration-based energy harvesting devices have received much attention over the past few years due to the need to power wireless devices in remote or hostile environments. To date, resonant linear generators have been the most common type of generators used in harvesting energy for such devices. Simple tuning and modelling methods make it a more favourable solution theoretically if not practically. This thesis considers the limitations of resonant linear devices and investigates two non-linear generators to see if they can outperform the linear devices in certain situations. So far, in most of the literature, the energy harvester is assumed to be very small dynamically compared to the source so the source is not affected by the presence of the device. This thesis considers how the dynamics of the source is affected by the device if its impedance is significant compared to the source. A tuning condition for maximum power transfer from the source to the device is derived. This tuning condition converges to the one presented in most of the literature when the impedance of the device is assumed to be very small compared to that of the source i.e. tuned so that the natural frequency of the device equals the excitation frequency. For the case when the impedance of the device has a negligible effect on the source, the performance of the device is only limited to a narrow frequency band and drops off rapidly if mistuned. To accommodate the mistuning limitations, new types of generators are proposed mainly by using a non-linear mechanism.These mechanisms are made up of a non-linear spring connected together with a mass and a linear viscous damper i.e. the energy harvesting component. The analysis of the fundamental performance limit of any non-linear device compared to that of a tuned linear device is carried out using the principal of conservation of energy. The analysis reveals that the performance of a non-linear device in terms of the power harvested is at most 4x greater than that of a tuned linear system and is strongly dependent upon the type of the non-linearity used. Two types of non-linear mechanisms are studied in this thesis. The first one is a non-linear bi-stable mechanism termed a snap-through mechanism which rapidly moves the mass between two stable states. The aim is to steepen the displacement response curve as a function of time which results in the increase of velocity for a given excitation, thus increasing the amount of power harvested. This study reveals that the performance of the mechanism is better than a linear system when the natural frequency of the system is much higher than the excitation frequency. The study also shows that the power harvested by this mechanism rolls off at a slower rate compared to that of the linear system. Another non-linear mechanism described in this thesis uses a hardening-type spring. The aim of this mechanism is to provide a wider bandwidth over which the power can be harvested. This thesis presents numerical solutions and approximate analytical solutions for the bandwidth and effective viscous damping of a non-linear device employing a hardening-type stiffness. Unlike the linear system, in which the bandwidth is only dependent on the damping ratio, it is found that the bandwidth of the nonlinear device depends on both the strength of the nonlinearity and the damping ratio. Experimental results are presented to validate the theoretical results. This thesis also investigates the benefits of the non-linear device for a low frequency and high amplitude application using the measured vibration inputs from human motion such as walking and running. The effect of harmonics on the power harvested is also studied. Numerical simulations are carried out using measured input vibrations from human motion to study the best placement of the natural frequency of the device across the range of harmonics
Design of interacting multi-stable nucleic acids for molecular information processing
No full textDespite an exponential increase in computing power over the past decades, present information technology falls far short of expectations in areas such as cognitive systems and micro robotics. Organisms demonstrate that it is possible to implement information processing in a radically different way from what we have available in present technology, and that there are clear advantages from the perspective of power consumption, integration density, and real-time processing of ambiguous data. Accordingly, the question whether the current silicon substrate and associated computing paradigm is the most suitable approach to all types of computation has come to the fore. Macromolecular materials, so successfully employed by nature, possess uniquely promising properties as an alternate substrate for information processing. The two key features of macromolecules are their conformational dynamics and their self-assembly capabilities. The purposeful design of macromolecules capable of exploiting these features has proven to be a challenge, however, for some groups of molecules it is increasingly practicable. We here introduce an algorithm capable of designing groups self-assembling of nucleic acid molecules with multiple conformational states. Evaluation using natural and artificially designed nucleic acid molecules favours this algorithm significantly, as compared to the probabilistic approach. Furthermore, the thermodynamic properties of the generated candidates are within the same approximation as the customised trans-acting switching molecules reported in the laboratory
ANALISIS ESTETIK LUKISAN JONI RAMLAN BEROBJEK SEPEDA
Full text linkLukisan Joni ramlan dengan objek sepeda yang digambarkan sebagai suatu obyek yang sarat dengan cerita. Joni melukiskan sepeda cenderung dengan keunikan karakter visual yang estetis dan konseptual yang dikandungnya. Sepeda juga digambarkan joni sebagai suatu obyek yang menjadi simbol tentang keras dan beratnya kehidupan penunggangnya.
Fokus dalam penelitian ini adalah; (1) Apa konsep estetik lukisan Joni Ramlan berobjek sepeda?, (2) Apa bentuk estetik lukisan Joni Ramlan berobjek sepeda?, (3) Apa makna estetik lukisan Joni Ramlan berobjek sepeda?
Penelitian ini merupakan kajian secara deskriptifkualitatif,dimana penelitian kualitatif didefinisikan sebagai suatu proses penelitian untuk memahai masalah kemanusiaan dan kemasyarakatan yang didasarkan pada satu acuan, gambaran holistik, deskriptif, rinci, dan dilaksanakan dalam latar belakang alamiah. Paradigma penelitian ini adalah interpretatif dengan fokus estetika. dengan menempatkan Joni Ramlan sebagai seniman dan karyanya lukis dengan objek sepeda sebagai objek penelitian.
Joni Ramlan memiliki kesederhanaan tema dan teknik dengan gaya ungkap simbolik, dengan mengeksplorasi bentuk-bentuk artistik yang begitu dominan dengan tekstur dan warna yang cenderung monokrom. Karya-karya Joni dengan objek sepeda sebagai artifak yang merupakan simbol dari perjuangan kehidupan, sepeda sebagai bagian narasi kehidupan manusia lapis bawah yang menggunakannya sebagai penunjang kebutuhan sehari-hari.
Kata kunci : estetik, seni rupa, lukisan
Abstract
Joni Ramlan painting with bicycle object described as an object that is loaded with stories. Joni bikes tend to describe the unique character of the visual aesthetic and conceptual contains. Bicycles are also described by Joni as an object that became a symbol of the hard and the severity of the rider's life.
The focus of this research is; (1) What is the aesthetic concept of painting Joni Ramlan with the bike objects?, (2) What aesthetic forms of painting Joni Ramlan with the bike objects?, (3) What is the aesthetic meaning of painting Joni Ramlan with the bike objects?
This research is a qualitative descriptive study, with qualitative research is defined as a process of research to understand the problems of humanity and society which is based on a reference, a holistic picture, descriptive, detailed, and carried out in a natural background. This study is the interpretive paradigm with a focus on aesthetics. By placing Joni Ramlan as an artist and his work with painted bicycle as an object of research.
Joni Ramlan has simplicity style themes and techniques with a verbal symbolic, to explore the artistic forms that are so dominant with texture and color that tends to monochrome. Joni artworks with the bike as artifacts is a symbol of the struggle for life, bike as part of narrative by the lower layer human lives used as supporting daily needs.
Keywords: aesthetic, art, painting
 
An Extended Dot-Bracket-Notation for Functional Nucleic Acids
No full textFunctional nucleic acids are an attractive substrate for molecular computing. A nucleic acid molecule is a linear chain of covalently bound building blocks assembled in arbitrary order from a set of typically four nucleotides. Certain pairs of nucleotides weakly attract each other through short-range electrostatic interaction and, accordingly, complementary sequences of nucleotides can bind to each other. The complementary stretches of nucleic acids that attract each other can be part of two different molecules or two parts of a single molecule. Binding within a single molecule leads to a folding of the linear chain. This so called secondary structure is of great importance for the function of nucleic acids. The present paper is concerned with the representation of this secondary structure. We propose an extension for the syntax of the standard dot-bracket notation to increase its convenience and expressive power for both its use to communicate nucleic acid secondary structures among humans and machines. The extensions reflect our own requirements for the representation of nucleic acids for molecular computation, but should be useful for functional nucleic acids in general
Tari Berthema"Munding laya dikusumah"
No full textTari Berthema"Munding laya dikusumah"
Karya: Lalan Ramlan, Yeti Haryadi, Ujian penyajian Tari, Pendapa Surakart
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