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Search Results: 1 - 10 of 113 matches for " RINI PUSPITANINGRUM "
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Isolation and Characterization of Chelonia mydas Myoglobin
HAYATI Journal of Biosciences , 2012,
Abstract: Green sea turtle – Chelonia mydas is a lung respiration animal that is able to dive and stay uder sea water for hours without needing to surface for oxygen. As oxygen supply in muscles is assured by myoglobin, we propose to study some characteristic of this muscle protein in green sea turtles. To achieve this objective, pure green sea turtle myoglobin has to be made available. Therefore, our first task is to purify this muscle protein from green sea turtles. Skeletal muscles from 3 green sea turtle hatchlings were studied icroscopically and biochemically. Microscopy observation showed a general structure of striated muscle. Biochemical studies revealed that green sea turtle myoglobin could be more purely isolated to a certain degree by ephadex G-75 gel filtration and purified by immunoaffinity gel chromatography rather than direct purification by DEAE-Sepharose ion exchange chromatography technique. SDS-PAGE analysis showed that green sea turtle myoglobin ran together with horse myoglobin as 17 kDa molecular weight proteins.
Blood Gasses Contents of Green Turtle (Chelonia mydas) Hatch Treated by Different Temperatures
HAYATI Journal of Biosciences , 2011,
Abstract: The aim of this research was to gain the profile of blood gasses of green turtle (Chelonia mydas) hatch. Blood gas of the green turtle was analysed after exposuring them at 28 oC and 50% of humidity for 24 hours in a pvc tube and at 34 oC under sunlight exposured with 47% of humidity for 30 minutes. The result showed the different values of blood gas contents. This result showed indication of metabolism activities and poikilothermic adaptation of green turtle hatch. This information can be used to support for turtle hatchery in Indonesia.
Myoglobin Expression in Chelonia mydas Brain, Heart and Liver Tissues
HAYATI Journal of Biosciences , 2010,
Abstract: An understanding of the underpinning physiology and biochemistry of animals is essential to properly understand the impact of anthropogenic changes and natural catastrophes upon the conservation of endangered species. An observation on the tissue location of the key respiratory protein, myoglobin, now opens up new opportunities for understanding how hypoxia tolerance impacts on diving lifestyle in turtles. The respiratory protein, myoglobin has functions other than oxygen binding which are involved in hypoxia tolerance, including metabolism of reactive oxygen species and of the vascular function by metabolism of nitric oxide. Our work aims to determine whether myoglobin expression in the green turtle exists in multiple non muscle tissues and to confirm the hypothesis that reptiles also have a distributed myoglobin expression which is linked to the hypoxiatolerant trait. This initial work in turtle hatch Chelonia mydas confirms the presence of myoglobin transcriptin brain, heart and liver tissues. Furthermore, it will serve as a tool for completing the sequence and generating an in situ hybridization probe for verifying of cell location in expressing tissues.
Rini Handayani
Jurnal Akuntansi dan Keuangan , 2007,
Abstract: The objectives of the research are to examine some factors that influence intention of utilization of information system and information system usage. The study is based on the model proposed by Venkatesh et al.,(2003). This study used data that obtained from individual perception of information sistem user in manufacture company that have losted at Bursa Efek Jakarta. Three hundred questionnaires have sent to companies, 83 questionnaires were returned, and only 60 questionnaires can be used. The data were analyzed by using multiple regression by SPSS 11.5 software. Study results show that performance expectancy, effort expectancy and social factor are significant positive influence to intention of information system. Facilitating conditions give significant positive influence to information system usage and intention of information system is insignificant positive influence to information system usage. Abstract in Bahasa Indonesia : Tujuan penelitian ini adalah untuk menguji faktor-faktor yang mempengaruhi minat pemanfaatan sistem informasi dan pengaruhnya terhadap penggunaan sistem informasi dengan menguji model yang diajukan oleh Venkatesh et al. (2003). Data diperoleh dari persepsi individu pemakai sistem informasi pada perusahaan manufaktur yang terdaftar di Bursa Efek Jakarta. Sebanyak 83 kuesioner kembali dari 300 yang dikirim dan 60 kuesioner yang dapat diolah. Dengan menggunakan teknik regresi berganda, hasil penelitian menunjukkan bahwa ekspektasi kinerja dan ekspektasi usaha dan faktor sosial berpengaruh positif signifikan terhadap minat pemanfaatan sistem informasi. Kondisi-kondisi yang memfasilitas pemakai berpengaruh positif signifikan terhadap penggunaan sistem informasi dan minat pemanfaatan sistem informasi tidak berpengaruh terhadap penggunaan sistem informasi. Kata kunci: ekspektasi kinerja, ekspektasi usaha dan faktor sosial.
Analisis Faktor-Faktor yang Menentukan Fektivitas Sistem Informasi pada Organisasi Sektor Publik
Rini Handayani
Jurnal Akuntansi dan Keuangan , 2010,
Abstract: The objective of this study is to examine some factors that determinant of information system effectiveness. The study is based on the model proposed by Gupta et al.,(2007). Data used in this study is primary data based on questionnaires distributed to public sector organization in Surakarta. Three hundred questionnaires have sent to companies, 105 questionnaires were returned, and only 97 questionnaires can be used. The data were analyzed by using multiple regression by SPSS 16 software. The results of this study show that top management, information system management and information system use are statistically significant positive influence to information system effectiveness. User satisfaction and organization culture are insignificant positive influence to information system effectiveness. in Bahasa Indonesia:
Cultura e interazioni sociali: riflessioni sulla storia, sulla geografia e sulla lingua italiana per una didattica contemporanea interculturale
Giorgio Rini
Narrare i Gruppi , 2013,
Abstract: Riassunto Volgendo lo sguardo verso la complessità sociale non possiamo non sentire la necessità di fare alcune riflessioni che riguardano i contatti con le altre culture sia sul piano didattico, nella scuola, sia sull’interazione sociale. Da questo punto di vista appare urgente una riflessione approfondita che vada a toccare i valori espressi dalla multiculturalità, se non altro per com-prendere meglio il contesto locale nel quale viviamo. Allo scopo vogliamo partire proprio da lontano nel tempo e partiamo dal concetto di mito e dalle narrazioni in esso contenute.A nostro avviso i concetti espressi dal mito si prestano molto bene per la costruzione di un percorso che questo lavoro vuole sviluppare e che toccherà da vicino alcune riflessioni sulla lingua italiana, sulla storia e sulla geografia. Si tratta di prendere le mosse dai risvolti che le vicende mitologiche assumono per farne una rilettura di carattere pedagogico, antropologico e psicologico. Parole chiave: interculturalità, interazione, storia, didattica, contesto locale, scuolaCultures and social interactions: reflections on history, geography and Italian lan-guage for a contemporary intercultural didactics AbstractIf you look towards the current social complexity we certainly feel the need to make some reflections concerning contacts with other cultures both in terms of teaching in the school, and on a social level. From this point of view, an in-depth reflection seems urgent which hits the values expressed by many cultures, even if only to better understand the local context we live in, and the necessary changes for a new structure intercultural learning. With this intent, we want to start from far away in time and we start from the concept of myth and the narratives contained in it. In our opinion, the concepts expressed by myth apply very well to the construction of a path that this work aims at developing and that will closely touch some reflections on the Italian language, history and geography. It is to build on the implications mythological events undertake to make a pedagogical, psychological and anthropological re-reading.Key word: intercultural interaction, history, education, local context, school
On the Capacity of a General Multiple-Access Channel and of a Cognitive Network in the Very Strong Interference Regime
Stefano Rini
Mathematics , 2012,
Abstract: The capacity of the multiple-access channel with any distribution of messages among the transmitting nodes was determined by Han in 1979 and the expression of the capacity region contains a number of rate bounds and that grows exponentially with the number of messages. We derive a more compact expression for the capacity region of this channel in which the number of rate bounds depends on the distribution of the messages at the encoders. Using this expression we prove capacity for a class of general cognitive network that we denote as "very strong interference" regime. In this regime there is no rate loss in having all the receivers decode all the messages and the capacity region reduces to the capacity of the compound multiple-access channel. This result generalizes the "very strong interference" capacity results for the interference channel, the cognitive interference channel, the interference channel with a cognitive relay and many others.
A New Random Coding Technique that Generalizes Superposition Coding and Binning
Stefano Rini
Mathematics , 2012,
Abstract: Proving capacity for networks without feedback or cooperation usually involves two fundamental random coding techniques: superposition coding and binning. Although conceptually very different, these two techniques often achieve the same performance, suggesting an underlying similarity. In this correspondence we propose a new random coding technique that generalizes superposition coding and binning and provides new insight on relationship among the two With this new theoretical tool, we derive new achievable regions for three classical information theoretical models: multi-access channel, broadcast channel, the interference channel, and show that, unfortunately, it does not improve over the largest known achievable regions for these cases.
An Achievable Region for a General Multi-terminal Network and the corresponding Chain Graph Representation
Stefano Rini
Mathematics , 2011,
Abstract: Random coding, along with various standard techniques such as coded time-sharing, rate-splitting, superposition coding, and binning, are traditionally used in obtaining achievable rate regions for multi-terminal networks. The error analysis of such an achievable scheme relies heavily on the properties of strongly joint typical sequences and on bounds of the cardinality of typical sets. In this work, we obtain an achievable rate region for a general (i.e. an arbitrary set of messages shared amongst encoding nodes, which transmit to arbitrary decoding nodes) memoryless, single-hop, multi-terminal network without feedback or cooperation by introducing a general framework and notation, and carefully generalizing the derivation of the error analysis. We show that this general inner bound may be obtained from a chain graph representation of the encoding operations. This graph representation captures the statistical relationship among codewords and allows one to readily obtain the rate bounds that define the achievable rate region. The proposed graph representation naturally leads to the derivation of all the achievable schemes that can be generated by combining classic random coding techniques for any memoryless network used without feedback or cooperation. We also re-derive a few achievable regions for classic multi-terminal networks, such as the multi-access channel, the broadcast channel, and the interference channel, to show how this new representation allows one to quickly consider the possible choices of encoding/decoding strategies for any given network and the distribution of messages among the encoders and decoders.
Robust H Controller for High Precision Positioning System, Design, Analysis, and Implementation  [PDF]
Safanah M. Raafat, Rini Akmeliawati, Ismael Abdulljabaar
Intelligent Control and Automation (ICA) , 2012, DOI: 10.4236/ica.2012.33030
Abstract: In this paper, a systematic robust control design and analysis for a single axis precise positioner is presented. The effects of uncertainties on closed-loop stability and performance are considered in the H∞ robust controllers design. v-gap metric is utilized to validate the intelligently estimated uncertainty. The robust controllers are formulated within the frame- work of the standard H mixed sensitivity optimization problem. Furthermore, a specially designed integral-H∞ and two-degree-of-freedom 2 DOF H controllers are developed to provide improved robust performance and resolution properties. It is shown that the proposed design schemes are very effective for robust control and precise tracking performance of the servo positioning system.
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