101 research outputs found
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A New Cartography of Imperial Power
No full textIn his latest book, Robert D Kaplan seeks to map the shifting contours of contemporary geopolitics. Instead, writes Manan Ahmed, its author ends up lost
in cultural stereotype and misdirected scholarshi
Makna Idiomatik Repetisi pada Kumpulan Puisi Perempuan Wali Kota Karya Suryatati A Manan
No full textThe study starts from the particularities owned the collection of poems Perempuan Wali Kota Suryatati A Manan. The specificity contained in the repetition of words in poetry. The repetition of a word or phrase in the poem expressed as reps. Repetition in a poem creates the aesthetic value of the poem. It is contained in a collection of poems Perempuan Wali Kota Suryatati A Manan. Through this study, the author examines the message delivered in a collection of poetry Women authors mayor expressed through repetition idiomatic meaning. Therefore, the assessment focused on the meaning of idiomatic repetition contained in a collection of poems Perempuan Wali Kota Suryatati A Manan. This is formulated problem is how the idiomatic meaning reps on a collection of poems Perempuan Wali Kota Suryatati A Manan. The purpose of this study is to explain and describe the meaning of idiomatic repetitions on a collection of poems Perempuan Wali KotaSuryatati A Manan. This research data is a letter, word, or phrase containing repetition. Source of research data derived from a collection of poems Perempuan Wali Kota Suryatati A Manan. The data collection was done by using the documentation. Data analysis was performed using the idiomatic meaning of the word at the role of repetition in the collection of poems Perempuan Wali Kota Suryatati A Manan works in construction. The results showed no repetition idiomatic meaning that the writer used to convey a message to the reader
MANAJEMEN MASJID DALAM MEMAKMURKAN MASJID ISLAMIC CENTER SYEKH ABDUL MANAN INDRAMAYU DI BIDANG IMARAH
No full textThe management of imarah which is applied by the mosque management in prospering the Islamic Center Syekh Abdul Manan Indramayu Mosque is the center of attention and how the mosque management faces the opportunities and challenges that exist because it is an icon of Indramayu. The purpose of this research is to find out how the management system of the Islamic Center Syekh Abdul Manan Indramayu Mosque in the field of emirates and to find out the opportunities and challenges in prospering the Islamic Center Syekh Abdul Manan Indramayu Mosque. The research method uses a qualitative approach with data collection techniques in the form of observation, interviews and documentation. The results of this research indicate that the process of prospering mosques implemented by mosque administrators has met the requirements of existing mosque management knowledge, therefore the author can say that the Islamic Center Syekh Abdul Manan Indramayu Mosque can be used as an example as well as a benchmark for mosques that others, especially those in the City of Indramayu, because the mosque management applied is almost close to perfection.
Manajemen imarah yang diterapkan oleh pengurus masjid dalam memakmurkan Masjid Islamic Center Syekh Abdul Manan Indramayu menjadi pusat perhatian serta bagaimana pihak pengurus masjid dalam menghadapi peluang dan tantangan yang ada karena merupakan ikon Indramayu. Tujuan dari penelitian ini untuk mengetahui bagaimana sistem manajemen Masjid Islamic Center Syekh Abdul Manan Indramayu di bidang imarah serta untuk mengetahui peluang dan tantangan dalam memakmurkan Masjid Islamic Center Syekh Abdul Manan Indramayu. Metode penelitian menggunakan pendekatan kualitatif dengan teknik pengumpulan data berupa observasi, wawancara dan doumentasi. Hasil penelitian ini menunjukkan bahwa proses dari memakmurkan masjid yang diterapkan oleh pengurus masjid sudah memenuhi syarat-syarat ilmu manajemen masjid yang telah ada, maka dari itu penulis dapat mengatakan bahwa Masjid Islamic Center Syekh Abdul Manan Indramayu dapat dijadikan contoh sekaligus patokan untuk masjid-masjid yang lain, khususnya yang ada di Kota Indramayu, dikarenakan manajemen masjid yang diterapkan hampir saja mendekati kesempurnaan
Babad Arya Tabanan dan Ratu Tabanan
No full textIstilah babad pada umumnya berlaku bagi karya sastra yang
mengungkapkan cerita seja~ah, berbahasa Sunda, Jawa, Bali, Lombok, dan Madura. Darusuprapta (1984:10) menyatakan babwa babad adalah istilah yang dipakai untuk menyebut salah satu jenis karya sastra Jawa, Sunda, Bali, dan Lombok yang dipandang masib banyak mengandung unsur sejarah dengan menggunakan bahasa daerah masing-masing. Oleh karena itu, Darusuprapta menggolongkan babad ke dalam golongan sastra sejarah
Packaging and Deployment of Large Planar Spacecraft Structures
No full textThis thesis presents a set of novel methods to biaxially package planar structures by folding and wrapping. The structure is divided into strips connected by folds that can slip during wrapping to accommodate material thickness. These packaging schemes are highly efficient, with theoretical packaging efficiencies approaching 100%. Packaging tests on meter-scale physical models have demonstrated packaging efficiencies of up to 83%. These methods avoid permanent deformation of the structure, allowing an initially flat structure to be deployed to a flat state.
Also presented are structural architectures and deployment schemes that are compatible with these packaging methods. These structural architectures use either in-plane pretension -- suitable for membrane structures -- or out-of-plane bending stiffness to resist loading. Physical models are constructed to realize these structural architectures. The deployment of these types of structures is shown to be controllable and repeatable by conducting experiments on lab-scale models.
These packaging methods, structural architectures, and deployment schemes are applicable to a variety of spacecraft structures such as solar power arrays, solar sails, antenna arrays, and drag sails; they have the potential to enable larger variants of these structures while reducing the packaging volume required. In this thesis, these methods are applied to the preliminary structural design of a space solar power satellite. This deployable spacecraft, measuring 60 m x 60 m, can be packaged into a cylinder measuring 1.5 m in height and 1 m in diameter. It can be deployed to a flat configuration, where it acts as a stiff lightweight support framework for multifunctional tiles that collect sunlight, generate electric power, and transmit it to a ground station on Earth.</p
Sea lice population and sex differences in P-glycoprotein expression and emamectin benzoate resistance on salmon farms in the Bay of Fundy, New Brunswick, Canada.
No full textParasitic sea lice are a major challenge for salmon aquaculture. This is especially due to recent development of resistance to emamectin benzoate (EMB) in the parasite. We investigated 1) whether EMB treatment success in Grand Manan, Bay of Fundy, NB, can be explained through EMB bioassay and P-gp mRNA expression studies, 2) if other populations of sea lice not under EMB selective pressure possess similar EMB sensitivity as Grand Manan sea lice populations, and 3) heritability of EMB resistance in L. salmonis.
EMB bioassay results indicated population, species, sex, and temporal differences in EMB EC50 values. RT-qPCR analyses revealed population and sex differences in P-gp mRNA levels, correlating with the bioassay results. Laboratory-reared sea lice maintained their EMB sensitivity status up to the F3 generation. Caligus elongatus, collected from Grand Manan showed >2 fold lower EMB EC50 values compared with L. salmonis collected from the same site. Concurrent exposure to EMB and verapamil yielded no increase in C. elongatus sensitivity to the parasiticide.
Sea lice bioassay and P-gp mRNA studies can be used to track EMB resistance and sex differences in EMB sensitivity and P-gp mRNA levels exist in the parasite
Deployment mechanics of highly compacted thin membrane structures
No full textWe studied the effects of membrane thickness and crease density on the forces required to unfold creased membrane structures. 26 cm-diameter models were made using two different thicknesses (7.5 μm and 25 μm) of polyimide film, and wrapped around a 4 cm-diameter hub using two different crease densities. They were deployed quasi-statically, and the deployment forces were measured. Two regimes were observed: an initial phase (up to about 85% deployed) of low and variable stiffness, and a second phase (above 85% deployed) of high stiffness. The thinner membrane models required higher deployment forces than the thicker membrane models during the initial phase
High Curvature Folding of Deployable Space Structures
No full textThis thesis revolves around two distinctive yet interconnected problems about high curvature folding that hold profound significance to the design of deployable structures. The first part of the thesis attempts to understand the role of creases formed when a thin sheet is folded, and the second part explores a design framework for a flexure-based hinge.
Creases in thin sheet structures, such as solar sails or sunshades, can alter the deployment path, the final deployed configurations, and the bending stiffness, which have been identified as critical components for the functionality and attitude control of the satellite. A single crease can be idealized as a torsional spring and be parameterized by the neutral fold angle and the spring stiffness. Lack of repeatability in the experiments is a main challenge for reliable extraction of the crease properties. A careful experimental campaign was conducted on the formation of a fold, controlling the compaction force, distance, and time. The equilibrium fold angle was highly sensitive to the compaction distance and the alignment of the plates. Repeatable results were obtained by defining the compaction force over a specified time. An analytic model was derived by combining Euler’s Elastica with a plastic material model to rationalize the experimental observations. The analytical model identified the scaling laws of creasing, connecting force-displacement-angle parameters, and a finite element model was employed to verify the results.
Previous studies extracted the torsional spring stiffness experimentally using moment-angle relation. The accuracy of the extracted results is measured by comparing different boundary conditions. Neglecting the effects of fixed boundary conditions, a common assumption made in previous studies, is found to be responsible for errors of around 50%. A modification is introduced to account for the correct boundary condition by fitting an elastica on the deformed geometry where the fixed moment is guessed based on a shooting algorithm. Although the crease appears to be a point discontinuity at a macro-scale, the angle varies smoothly at a micro-scale, an inherent problem of using the moment-angle relation to extract crease properties. An alternate method is introduced to extract crease data, which does not involve measuring the crease angle. A non-dimensional elastica is combined with a torsional spring, which creates a set of all possible solutions for a given boundary condition.
The second part of the thesis focuses on designing a flexure-based hinge using high-strain composites. Flat flexures are sandwiched between the structural and functional layers of the panel, allowing the hinge to integrate with the panel smoothly. The flexures can be staggered in the width direction such that no contact is made between the two layers when folded or placed on top of each other making contact when folded. The non-contact folding is analyzed using an Elastica analysis, while the latter design uses finite element analyses. A design guideline is developed for both cases based on the maximum curvatures, horizontal and vertical projections, and the boundary force/moment. Non-dimensional results are plotted as a function of the hinge parameters, revealing regions that satisfy a given design requirement.
The minimum natural frequency of the deployed hinge-panel system is critical to the functionality, hence needs to satisfy a critical value. The second analytic framework was derived based on this requirement, where the hinge is modeled as a Timoshenko beam connecting to a rigid panel. Considering the in-plane deformations: bending and shearing, the equation of motion is solved for the first two natural frequencies. The model is validated using finite element results, where the predictions are within 1% accuracy for the first mode. Parametric studies show that the frequencies shift between bending-dominated to shear-dominated deformations depending on two non-dimensional length scales. The framework can be extended to more complex flexure geometries, such as tape springs, which previously required a case-by-case finite element analysis.
Finally, we show proof of concept of the hinge design by fabricating several prototypes using high-strain composites. Several HSC flexures are fabricated, and their properties are derived using laminate theory and coupon testing. All flexures survived the folding test. The natural frequency of the hinge was extracted using accelerometers where the unidirectional laminates agreed with the analytic predictions within 3% accuracy.</p
A letter to the Right Hon. Earl Bathurst, Lord Goderich, and the Right Rev. the Lord Bishop of London : in refutation of some of the gross misstatements contained in the newspaper reports of their speeches in the House of Lords, on the motion of the Right Honourable Lord King, "for a committee to be appointed, to inquire into the expenditure of the public money, granted to the Society for the Propagation of the Gospel in Foreign Parts, in His Majesty's colonies of North America."
No full textThe author was succ. Rector of St. George's Parish, Prince Edward Island, and of Grand Manan, New Brunswick.Mode of access: Internet
High Curvature Folding of Deployable Space Structures
No full textThis thesis revolves around two distinctive yet interconnected problems about high curvature folding that hold profound significance to the design of deployable structures. The first part of the thesis attempts to understand the role of creases formed when a thin sheet is folded, and the second part explores a design framework for a flexure-based hinge.
Creases in thin sheet structures, such as solar sails or sunshades, can alter the deployment path, the final deployed configurations, and the bending stiffness, which have been identified as critical components for the functionality and attitude control of the satellite. A single crease can be idealized as a torsional spring and be parameterized by the neutral fold angle and the spring stiffness. Lack of repeatability in the experiments is a main challenge for reliable extraction of the crease properties. A careful experimental campaign was conducted on the formation of a fold, controlling the compaction force, distance, and time. The equilibrium fold angle was highly sensitive to the compaction distance and the alignment of the plates. Repeatable results were obtained by defining the compaction force over a specified time. An analytic model was derived by combining Euler’s Elastica with a plastic material model to rationalize the experimental observations. The analytical model identified the scaling laws of creasing, connecting force-displacement-angle parameters, and a finite element model was employed to verify the results.
Previous studies extracted the torsional spring stiffness experimentally using moment-angle relation. The accuracy of the extracted results is measured by comparing different boundary conditions. Neglecting the effects of fixed boundary conditions, a common assumption made in previous studies, is found to be responsible for errors of around 50%. A modification is introduced to account for the correct boundary condition by fitting an elastica on the deformed geometry where the fixed moment is guessed based on a shooting algorithm. Although the crease appears to be a point discontinuity at a macro-scale, the angle varies smoothly at a micro-scale, an inherent problem of using the moment-angle relation to extract crease properties. An alternate method is introduced to extract crease data, which does not involve measuring the crease angle. A non-dimensional elastica is combined with a torsional spring, which creates a set of all possible solutions for a given boundary condition.
The second part of the thesis focuses on designing a flexure-based hinge using high-strain composites. Flat flexures are sandwiched between the structural and functional layers of the panel, allowing the hinge to integrate with the panel smoothly. The flexures can be staggered in the width direction such that no contact is made between the two layers when folded or placed on top of each other making contact when folded. The non-contact folding is analyzed using an Elastica analysis, while the latter design uses finite element analyses. A design guideline is developed for both cases based on the maximum curvatures, horizontal and vertical projections, and the boundary force/moment. Non-dimensional results are plotted as a function of the hinge parameters, revealing regions that satisfy a given design requirement.
The minimum natural frequency of the deployed hinge-panel system is critical to the functionality, hence needs to satisfy a critical value. The second analytic framework was derived based on this requirement, where the hinge is modeled as a Timoshenko beam connecting to a rigid panel. Considering the in-plane deformations: bending and shearing, the equation of motion is solved for the first two natural frequencies. The model is validated using finite element results, where the predictions are within 1% accuracy for the first mode. Parametric studies show that the frequencies shift between bending-dominated to shear-dominated deformations depending on two non-dimensional length scales. The framework can be extended to more complex flexure geometries, such as tape springs, which previously required a case-by-case finite element analysis.
Finally, we show proof of concept of the hinge design by fabricating several prototypes using high-strain composites. Several HSC flexures are fabricated, and their properties are derived using laminate theory and coupon testing. All flexures survived the folding test. The natural frequency of the hinge was extracted using accelerometers where the unidirectional laminates agreed with the analytic predictions within 3% accuracy.</p
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