24 research outputs found
Analisa Pengaruh Beban Pendingin dengan Menggunakan Elemen Panas Listrik dan Lingkungan Aktual Terhadap Kinerja Sistem Mesin Pendingin
No full textRefrigerasi adalah proses pengambilan kalor atau panas dari suatu benda atau
ruang untuk menurunkan temperaturnya. Kalor adalah salah satu bentuk dari energi,
sehingga mengambil kalor suatu benda ekuivalen dengan mengambil sebagian energi
dari molekul-molekulnya. Pada aplikasi tata udara (air conditioning), kalor yang
diambil berasal dari udara.
Kalor yang diambil dalam suatu ruangan pada sistem refrigrasi disebut beban
pendinginan, dalam proses pengambilan kalor tersebut dapat mempengaruhi kinerja
sistem mesin pendingin, hal ini bergantung terhadap seberapa besar kalor yang akan
diambil oleh sistem refrigerasi.
Pada penelitian ini penulis akan membahas tentang efek beban pendingin
terhadap kinerja sistem mesin pendingin meliputi kapasitas refrigerasi, koefisien
prestasi dan waktu pendinginan. Penelitian dilakukan dengan beban pendinginan
menggunakan elemen panas listrik sebesar 480 Watt dan 630 Watt, dan beban
pendinginan pada lingkungan aktual. Sehingga diharapkan penggunaan mesin pendingin
dapat lebih efektif dan efisien. / Refrigeration is the process of taking the heat or the heat of an object or space to
lower the temperature. Heat is a form of energy, so take the heat of an object is
equivalent to taking some of the energy of the molecules. On the application of air
conditioning, heat taken from the air.
Heat is taken in a room at refrigrasi system called the cooling load, the heatmaking process can affect the performance of the refrigeration system, it depends on
how much heat to be captured by the system refrigation.
In this research the author will discuss about the effect of the cooling load on the
refrigeration system performance includes the refrigeration capacity, coefficient of
performance and cooling time. The research was conducted with the cooling load using
electric heat element of 480 Watt and 630 Watt, and the actual cooling load on the
environment. So expect the use of engine coolant can be more effective and efficient
The correlation between stacking-faults and recrystallisation in impurity-doped copper
No full textApplied Science
Development of a novel thermal insulation system for building envelope application
No full textThe building sector is responsible for 38% of global energy and process-related greenhouse gas emissions. In recent decades, a rapid increase in energy consumption in buildings has been witnessed, making energy reduction a pressing issue. Thermal insulation systems, that can operate dynamically in response to changing transient conditions, by alternating between thermally conductive and insulated states, are gaining attention in their architectural applications, since they constitute an effective mean for reducing energy consumption while simultaneously improving occupants comfort levels. Despite the pioneering work that has been conducted by researchers to develop adaptive insulation technologies in different engineering fields, currently none of the adaptive insulation technologies are embedded in real-world buildings for a number of reasons. The aim of this thesis, therefore is to identify these reasons and on this basis, to explore, the different ways in which an adaptive insulation system can be created. There are no established standards or requirements for the development of adaptive thermal insulation technologies. Consequently, this research initially focuses on the creation of design criteria that address aspects related to thermal performance, design feasibility, and technological complexity of the examined systems. Subsequently, the exploration of different design concepts was initiated by first creating a scheme of aspects, concerning the geometry of the core, the mobility of the outer layer, the number of cavity compartments, the type of actuation and the types of mechanisms that facilitate the transition between thermal insulation states. From the combination of these aspects, six design alternatives emerged, the principle of operation of which is based on the idea of a structure that can inflate and deflate during the transition of the system from the insulated to the conductive state. The core geometry of the concepts was modeled within TRISCO steady-state 3D software tool, where various parameters were tested in order to obtain the final topology. The aim was to achieve a thermal resistance comparable to that of state-of-the-art insulating materials in their insulated state and furthermore, to achieve a large range of shift in order to acquire a significantly low thermal resistance in the conductive state comparable to the case of an uninsulated concrete block. Simultaneously, the thermal transmittance (U-value) for the insulated and conductive states of each concept was estimated through numerical simulations in TRISCO and validated using analytical models for comparison. The results of the analysis indicated that, the thickness of the air cavity and the emissivity of the membrane material greatly affect the examined thermal resistance. Additionally, the range of shift depends significantly on the degree of evacuation of the air cavity. It has been found that technologies whose structure and working principle allow full compression of the core in the conductive state, can lead to a lower thermal resistance which is governed by solid conduction. The results of the simulations showed that one of the examined concepts satisfied the initial goal, achieving thermal transmission which ranged from 0.13 W/𝑚2K to 2.79 W/𝑚2K in the insulated and conductive states respectively. Whereas, the thermal resistance ranged from 7.5 𝑚2/KW to 0.4 𝑚2/KW in the insulatedand conductive states respectively. The obtained values of thermal transmittance from TRISCO, were compared with the thermal transmittance from analytical formulas. In this way, the accuracy of the numerical simulations was validated. The final stage of the design exploration phase led to the selection of the final design through a multi-criteria analysis that is aligned with the aforementioned initial design criteria. The final design is a 1.5 m by 0.75 m opaque panel of low emissivity honeycomb core made up of 10 mm cells. In the insulated state the panel has a thickness of 0.18 m while after being compressed the thickness is reduced to 1/3. Actuation of the system is achieved using a dual-function pump that supplies air to a system of channels that access the core. An approximation of the sizes of the pump and pipes were given for the design of the air-supply system. In this way, the system can be reversibly switched between an inflated state governed by gaseous conduction and a deflated state, where the solid conduction of adjacent surfaces governs. The architectural application of the adaptive insulation system, considers the element as an infill component in which the outer skin is integrated into the system, implying that the transition between thermal states is visible from the façade. To conclude, this research explores the potentials of using the parameters influencing heat transfer capability for the development of an adaptive insulation system intended to be used in the building envelope. The research through design resulted in a promising design based on the resulting thermal performance indicators. However, to realize the proposed technology, tests on physical model need to be conducted. The thermal performance of the system should be validated experimentally in order to derive statistical data for its safe application and the actual dimensions of the air-supply system need to be determined.Architecture, Urbanism and Building Sciences | Building Technolog
Epistemologi Tafsir Klasik: Studi Analisis Pemikiran Ibnu Katsir
No full textEpistemology is basically a branch of philosophy that studies the roots of thought and basic concepts of submission. The concept has a paradigm that gives birth to an idea in the process of thinking. This shows that there is an epistemology used by classical commentators, Ibn Katsir in understanding and explaining verses of the Qur'an in a lengthy and broad manner. Because of this interpretation if examined and critically examined again will be found in a comprehensive direction of thought in interpreting the Qur'an. Therefore, this paper is here to express and map significantly the epistemology of Ibn Katsir thought in the interpretation process. Thus it can be concluded, the source of knowledge in the interpretation contains two broad classifications, namely: First. Tafsir Bil Ma’tsur. Secondly, Tafsir Al-Ra'yi. The interpretation of bil matsur is divided into four interpretations, namely, the interpretation of the Qur’an with the Qur’ran, the interpretation of the Qur’an with the Hadith, the interpretation of the Qur’an with friends, and the interpretation of the Qur’an with the opinion the tabi'in. while the interpretation of Al-Ra'yi as rational is supported by the science of the rules of language to reveal the meaning of sitematic ceremony. In short, the author will make a clear contribution on how the epistemology of the Qur'anic interpretation is carried out by Ibn Katsir.
 
MATAN HADIS CRITICISM METHODOLOGY Comparative Analysis between Muhammad Syuhudi Ismail and Muḥammad Al-GazÄliy
No full textAbstract. Tracing the history of hadith is a common thing to be studied and carried out by various academic circles. However, along with the dynamics, which are quite dynamic, there have been problems, including Islamic thought and even orientalist thinking to examine the hadith texts of the Prophet Muhammad, which is growing rapidly, especially in the study of hadith studies. There are two main aspects of the foundation in hadith research, namely, authentic and skeptical. The term becomes the result of the conclusion when the hadith has been carried out in terms of the quality of the sanad, matan, and rawi. However, understanding the hadith does not revolve around understanding the content and substance of the hadith. How Islamic thinkers try to reconstruct the methodology in understanding the criticism of hadith so that the hadiths achieved are accurate and maintain traditions from errors and falsehoods. This paper explores the ideas of Muhammad Syhudi and Muhammad al-Ghazaliy in theory development (Matan Hadith Criticism Methodology). Then the author tries to prove and support the development of the study of hadith studies, especially academics conducting hadith research.Tracing the history of hadith is a common thing to be studied and carried out by various academic circles. Along with the dynamics which are quite dynamic, there have been problems including Islamic thought and even orientalist thinking to examine the hadith texts of the Prophet Muhammad which is growing rapidly, especially in the study of hadith studies. There are two main aspects of the foundation in hadith research, namely between authentic and skeptical. The term becomes the result of the conclusion when the hadith has been carried out both in terms of the quality of the sanad, matan, and narration. However, understanding the hadith does not revolve around the concept of understanding the content and substance of the hadith. how Islamic thinkers try to reconstruct the methodology in understanding the criticism of hadith so that the hadiths achieved are truly accurate and maintain traditions from errors and falsehoods. This paper tries to explore the ideas of Muhammad Syhudi and Muhammad al-Ghazaliy in theory development (Matan Hadith Criticism Methodology). Then the author tries to prove and support the development of the study of hadith studies, especially academics in conducting hadith research
Dido3-dependent SFPQ recruitment maintains efficiency in mammalian alternative splicing
No full text© The Author(s) 2019.Alternative splicing is facilitated by accessory proteins that guide spliceosome subunits to the primary transcript. Many of these splicing factors recognize the RNA polymerase II tail, but SFPQ is a notable exception even though essential for mammalian RNA processing. This study reveals a novel role for Dido3, one of three Dido gene products, in alternative splicing. Binding of the Dido3 amino terminus to histones and to the polymerase jaw domain was previously reported, and here we show interaction between its carboxy terminus and SFPQ. We generated a mutant that eliminates Dido3 but preserves other Dido gene products, mimicking reduced Dido3 levels in myeloid neoplasms. Dido mutation suppressed SFPQ binding to RNA and increased skipping for a large group of exons. Exons bearing recognition sequences for alternative splicing factors were nonetheless included more efficiently. Reduced SFPQ recruitment may thus account for increased skipping of SFPQ-dependent exons, but could also generate a splicing factor surplus that becomes available to competing splice sites. Taken together, our data indicate that Dido3 is an adaptor that controls SFPQ utilization in RNA splicing. Distributing splicing factor recruitment over parallel pathways provides mammals with a simple mechanism to regulate exon usage while maintaining RNA splicing efficiency.Spanish Ministry of Economics, Industry, and Competitiveness [SAF2016-75456-R, AEI/FEDER, EU]; Comunidad Autónoma de Madrid [B2017/BMD-3703 MITIC]; Foundation Alfonso Martin Escudero (to C.M.A.); CSIC predoctoral fellow FPI grant [BES-2014-068580 to C.M.G.]. Funding for open access charge: Project grants (SAF2016 and B2017) as listed under Funding
The Future Building Envelope: Circular and Adaptive: A strategy for designing demountable unitized curtain walls, with an application on 4 adaptive concepts
No full textThis report includes all the research conducted during the last phase of the Master of Science Building Engineering within the faculty of Civil Engineering. The main aim is to form a strategy for designing demountable unitized curtain walls; one that could actually be used in practice by future engineers and architects. This is why this graduation project includes an application on 4 chosen adaptive concepts. Having already been applied in a comparison study of these quite complicated and costly designs, this framework can provide one extra consideration that will be critical in the near future at the very early stages of designing a building: the Design for Disassembly.Civil Engineering | Building Engineerin
PERGESERAN PENAFSIRAN AYAT POLIGAMI DALAM Q.S. AN-NISA’ [4]: 3 (Studi Tafsir Era Klasik, Pertengahan, Modern-Kontemporer)
No full textInterpretation of polygamy verses in Q.S. An-Nisa '[4]: 3 is one of the Qur'anic
texts which is often discussed by various interpreters of the classical to contemporary
interpretations. Secondly, the era of modern-contemporary interpretation prefers to be
understood as a monogamous verse rather than the concept of polygamy. This diversity
has resulted in changes to the compilation of texts in varying difficulties and changes.
This is caused by several factors underlying the compilers to internalize the text and
complexity as a solution to answer the problems of the people. The focus of this study
addresses three interactions: (1) Why changes in the interpretation of Q.S. an-Nisa '[4]:
3 studies of the era of classical to contemporary interpretations. (2) Factors underlying
the transition of interpretation of the Q.S. an-Nisa '[4]: 3 Study of Interpretation from
Classical to Contemporary Era. (3) Classifying the forms of interpretation of the classical
to contemporary eras.
This research is a research which is a descriptive literature research using
historical-analytical studies. With this expectation the author tries to analyze the specific
interpretation of the Q.S. an-Nisa '[4]: 3 in the interpretation of the classical to
contemporary eras, then the writer will bring up the roots of thought about the
interpretation of the Qur'an
The results of this study indicate that, the shift in interpretation of polygamy
verses in Q.S. an-Nisa '[4]: 3 in the interpretation of the classical, middle, moderncontemporary
era that, the interpretation of the classical era tends to understand the
Qur'an textually and root the system patriarchal culture. While the interpretation of the
middle era interpretation is the development of an ideology and the interests of the
mufassir in understanding the verse of polygamy. However, interpretations of the
modern-contemporary era have shown the development of thinking structures and the
emergence of various scientific approaches that are critically explored so that in
understanding texts try to dialogue between texts with the social conditions of society.
As for the classification of interpretations including, First, the interpretation of
classical-mid-era interpretation is oriented (Subjectist Buys Pathirarkhi). Second, the
interpretation of the modern-contemporary era emphasizes more on women's rights,
namely (Gender Neutral Objectives), this principle as one to realize the objectives of the
Qur'an and eliminate pathirarkhi biases in the context of interpretation. While the forms
of epistemological shifts are, First, Interpretation of the Formative Era with Critical
Quasi Reason (Classical Era). Second, the Interpretation of the Affirmative Era with
Ideological Reason (Middle Era). Third, Interpretation of Reformative Era with Critical
Reason (Modern-Contemporary Era
REFORMULASI TAFSIR AL-QUR’AN DI ERA MODERN (Telaah Historis Dinamika, dan Transformasi Metodologi Interpretasi)
No full textEpistemology of the study of the methodology of interpretation is a necessity in the civilization of the Islamic world, because the current interpretation has experienced dynamics and paradigms, especially in the methodology, model, and application of interpretation. This has become one of academic anxiety, especially for the author to examine further its relation to the methodology of interpretation in the modern era. The focus of this research is trying to photograph how the development of modern interpretation, then how the methodology, model, and application of the interpretation of the Qur'an. Of course this is the basic assumption in this study. The type of this research is library research or known as literature research with a descriptive analysis approach by looking for problems and answering related issues that are studied through books, articles, journals, and relevant references. Keywords, the methodology of interpreting the Qur'an in the classical to modern-contemporary eras have shown very rapid dynamics, especially in terms of methodology and nuances of interpretation orientation. Interpretation of the Qur'an in the modern era is trying to ground and restore the spirit of the Qur'an with the birth of the Qur'an as an analytical knife, as if the Qur'an still exists and is able to respond to various problems of the people. So that the product or characteristic of the interpretation of the modern era is being able to place the Qur'an as (shalihun likulli era wa makkan). Therefore, understanding or interpreting the Qur'an does not stop textually, however, the mainstream of modern era interpretation, namely the nuances of its interpretation, is contextual. This is the reformulation or typical methodology of the interpretation of the Qur'an in the modern era
