Relevant bibliographies by topics / SMA

Academic literature on the topic 'SMA'

Author: Grafiati
Published: 4 June 2021
Last updated: 7 July 2024

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Journal articles on the topic "SMA"

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White, Sheryl L., Ming Yuan Zhou, Robert B. Low, and Muthu Periasamy. "Myosin heavy chain isoform expression in rat smooth muscle development." American Journal of Physiology-Cell Physiology 275, no. 2 (August 1, 1998): C581—C589. http://dx.doi.org/10.1152/ajpcell.1998.275.2.c581.

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Smooth muscle myosin heavy chains (MHCs), the motor proteins that power smooth muscle contraction, are produced by alternative splicing from a single gene. The smooth muscle MHC gene is capable of producing four isoforms by utilizing alternative splice sites located at the regions encoding the carboxy terminus and the junction of the 25- and 50-kDa tryptic peptides. These four isoforms, SM1A, SM1B, SM2A, and SM2B, are a combination of one of two heavy chains containing different carboxy-terminal tails (1 or 2) without (A) or with (B) an additional motif in the myosin head. In the present study, using RNA analysis and isoform-specific antibodies, we demonstrate the expression patterns of MHC isoforms during development in rat smooth muscle tissues. RNase protection analysis indicates that the mRNAs for SMA and SMB isoforms, which differ by a 21-nucleotide insertion in the region encoding the S1 head region of the myosin molecule, are differentially expressed during development in a highly tissue-specific manner. Smooth muscle MHC transcripts are first detectable in developing rat smooth muscle tissues at 17 days of fetal development. The SMB mRNA is shown to be expressed in smooth muscle from fetal bladder, intestine, and stomach and from neonatal aorta; however, it is not expressed in cultured smooth muscle cells from rat aorta. The SMA mRNA is also present at all stages of development in the smooth muscles examined; however, it is much less abundant than SMB mRNA in most fetal smooth muscles. We show here that the SMB isoform, which contains a unique seven-amino acid insertion at the junction of the 25- and 50-kDa tryptic peptides, is present in conjunction with SM1 and SM2 tails on immunoblots of smooth muscle from stomach, intestine, bladder, and uterus and is expressed during development in a pattern distinct from that of the SM1 and SM2 tail isoforms.
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Fujimura, Naoki, Hideaki Obara, Kenji Matsumoto, and Yuko Kitagawa. "Mycotic aneurysm of the superior gluteal artery in a patient with bacterial endocarditis: case report and review of the literature." Vascular 19, no. 1 (February 2011): 47–50. http://dx.doi.org/10.1258/vasc.2010.cr0225.

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Mycotic aneurysm of the superior gluteal artery (SGA) is extremely rare. The review of the literature revealed only five cases of mycotic SGA aneurysms reported to date and none had a concomitant superior mesenteric artery (SMA) aneurysm. We describe a 64-year-old man with mycotic aneurysms of both the SGA and the SMA. The patient was referred to our hospital because of SMA embolism caused by bacterial endocarditis following mitral valve plasty. He was treated conservatively, but monitoring using computerized tomography (CT) scanning showed the development and growth of the SGA and the SMA aneurysms. The SMA aneurysm was resected surgically, and the SGA lesion was treated by means of selective embolization. For the treatment of SGA aneurysms, prompt and precise preoperative evaluation is important. When the anatomical feature and size of the aneurysm is suitable, endovascular treatment may be the first-line treatment, providing an efficacious and safe alternative to traditional surgical repair.
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Iwan, Iwan, and Achmad Rante Suparman. "KONTRIBUSI KONSEP DIRI DAN MOTIVASI BERPRESTASI TERHADAP HASIL BELAJAR BIOLOGI DAN KIMIA SISWA SMA DI KOTA MANOKWARI." Pancaran Pendidikan 6, no. 1 (May 18, 2017): 133. http://dx.doi.org/10.25037/pancaran.v6i1.12.

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Penelitian ini bertujuan untuk mengetahui Kontribusi konsep diri dan motivasi berprestasi secara bersama-sama terhadap hasil belajar Biologi dan Kimia siswa SMA di Kota Manokwari.Penelitian ini merupakan penelitian ex-post facto yang dilaksanakan pada SMA di Kota Manokwari. Populasi dalam penelitian ini adalah seluruh siswa di SMA di kota Manokwari tahun ajaran 2015/2016, sebanyak 900 orang. Sampel penelitian ini adalah siswa pada tiga SMA di kota Manokwari tahun ajaran 2015/2016. Teknik pengambilan sampel adalah secara purposiverandom sampling. Sampel SMA di kota Manowari diambil secara purposive menjadi tiga kategoriberdasarkan akreditasi A, akreditas B, dan akreditasi C. Kemudian setiap kelompok sekolah berdasarkan akreditas diambil secara acak. Siswa kelas XI IPA SMA yang diambil sebagai responden dengan alasan sudah mencapai target kurikulum sebesar 51,16% dan belum mempersiapkan diri untuk menghadapi ujian nasional. Terdapat kontribusi positif konsep diri dan motivasi berprestasi secara bersama-sama terhadap hasil belajar Biologi siswa SMA di Kota Manokwari sebesar 74,3%. Dan begitu pula Terdapat kontribusi konsep diri dan motivasi berprestasi secara bersama-sama terhadap hasil belajar Kimia sebesar 19,9%.
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Nurmiati, Nurmiati. "Hubungan Antara Cara Belajar dan Motivasi Belajar Siswa dengan Hasil Belajar Biologi Siswa SMA di Kota Makassar." SAINTIFIK 3, no. 1 (December 7, 2017): 91–97. http://dx.doi.org/10.31605/saintifik.v3i1.115.

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Siswa yang memiliki cara belajar yang baik, dapat mencerminkan siswa yang memiliki motivasibelajar yang tinggi sehingga akan meningkatkan hasil belajar siswa.Tujuan penelitian ini adalah(i) untuk mengetahui hubungan antara cara belajar dengan hasil belajar siswa SMA di kotaMakassar, (ii) untuk mengetahui hubungan antara motivasi belajar dengan hasil belajar siswaSMA di kota Makassar, (iii) untuk mengetahui hubungan antara cara belajar dan motivasi belajarsecara bersama-sama dengan hasil belajar siswa SMA di kota Makassar. Jenis penelitian iniadalah penelitian éx-post facto” bersifat korelasional dengan teknik pengumpulan datamenggunakan angket dan dokumentasi.Hasil penelitian menunjukkan bahwa (i) cara belajarsiswa SMA Negeri di kota Makassar berada pada kategori sedang, dan ada hubungan denganhasil belajar biologi siswa SMA Negeri di kota Makassar, (ii) motivasi belajar siswa SMA Negeridi kota Makassar berada pada kategori sedang, dan ada hubungan dengan hasil belajar biologisiswa SMA Negeri di kota Makassar, (iii) hasil belajar siswa SMA Negeri di kota Makassarberada pada kategori sedang, dan ada hubungan antara cara belajar dan motivasi belajar secarabersama-sama dengan hasil belajar biologi siswa SMA Negeri di kota Makassar.Kata kunci—3-5 kata kunci, Algoritma A, algoritma B, kompleksitas
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Fitri Wijarini. "Achievement of Scientific Literacy Ability of Nunukan Regency Public High School Students." Asian Journal of Applied Education (AJAE) 2, no. 4 (October 13, 2023): 537–46. http://dx.doi.org/10.55927/ajae.v2i4.6415.

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The subjects of this study were students of SMA Negeri Nunukan which consisted of 4 schools namely SMA Negeri 1 Nunukan, SMA Negeri 2 Nunukan, SMA Negeri 1 Nunukan Selatan and SMA Negeri 2 Nunukan Selatan. Determination of the sample using proportionate sampling technique. The data collection instrument used the Scientific Literacy Assessment (SLA) in the form of 20 multiple choice questions with alternative answer choices a, b, c, d, and e. The average achievement of the ability of the four schools was 48.88 in the low category. The average scientific literacy achievement of Nunukan 1 Public High School students was 43.59. SMA Negeri 2 Nunukan of 48.62. SMA Negeri 1 Nunukan Selatan 50.31 and SMA Negeri 2 Nunukan Selatan 53.01.
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Choi, Yuna, and Young-Hee Lee. "Urban Effect on Sea-Breeze-Initiated Rainfall: A Case Study for Seoul Metropolitan Area." Atmosphere 12, no. 11 (November 9, 2021): 1483. http://dx.doi.org/10.3390/atmos12111483.

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We examined the sea-breeze-initiated rainfall in the Seoul Metropolitan area (SMA) on 6 July 2017 using the weather research and forecasting (WRF) model. The model captures the arrival of the sea breeze front (SBF), the development of afternoon rainfall in the SMA, and the location of the sea-breeze-initiated maximum rainfall in the northeastern SMA reasonably well but overestimates the subsequent rainfall. We conducted sensitivity tests to better understand the urban effect on the sea-breeze-initiated rainfall event. Through factor separation analysis, we first examined the explicit role of sea and urban effect on sea-breeze-initiated rainfall. The results show that the interaction of sea and urban effects cause rainfall in the northwest and northeast of the SMA, indicating that both urban heat island circulation (UHIC) and sea breeze play an important role in the study case’s rainfall. We further examined the relative role of urban roughness and anthropogenic heat on the sea-breeze-initiated rainfall through factor separation analysis. Both anthropogenic heat and urban roughness play a role in increasing precipitation in the northeastern area of the SMA, with a larger contribution of anthropogenic heat than urban roughness. The relationship between low-level convergence at the SBF and urban factors is discussed.
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Yani, Nur Fitri, Siti Zulaikha Wulandari, and Lina Rifda Naufalin. "Pengaruh Kecerdasan Emosional dan Self Regulated Learning terhadap Literasi Digital Siswa SMA Negeri 2 Purwokerto." Business and Accounting Education Journal 2, no. 2 (August 31, 2021): 139–46. http://dx.doi.org/10.15294/baej.v2i2.53405.

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Penelitian ini merupakan penelitian survei dengan metode kuantitatif pada kelas X SMA Negeri 2 Purwokerto dengan total populasi sebanyak 393 siswa dan sampel sebanyak 206 siswa. Penelitian ini bertujuan untuk menganalisis: (1) pengaruh kecerdasan emosional terhadap literasi digital siswa SMA Negeri 2 Purwokerto; (2) pengaruh self regulated learning terhadap literasi digital siswa SMA Negeri 2 Purwokerto; (3) pengaruh kecerdasan emosional dan self regulated learning secara bersama-sama terhadap literasi digital siswa SMA Negeri 2 Purwokerto. Pengambilan sampel pada penelitian ini menggunakan probability random sampling memperoleh sampel sebanyak 206 siswa. Metode penelitian yang digunakan adalah Analisis Regresi Berganda. Berdasarkan hasil penelitian dan analisis data menggunakan SPSS menunjukkan bahwa: (1) terdapat pengaruh yang positif dan signifikan antara kecerdasan emosional terhadap literasi digital siswa SMA Negeri 2 Purwokerto; (2) terdapat pengaruh yang positif dan signifikan antara self regulated learning terhadap literasi digital siswa SMA Negeri 2 Purwokerto; (3) terdapat pengaruh yang positif dan signifikan antara kecerdasan emosional dan self regulated learning secara bersama-sama terhadap literasi digital siswa SMA Negeri 2 Purwokerto.
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Wildan, Wildan, Sugeng Sutiarso, Rangga Firdaus, and Ari Suningsih. "Hubungan kemampuan penalaran matematis dan pemecahan masalah matematika materi matrik terhadap prestasi belajar." Jurnal Pendidikan Informatika dan Sains 12, no. 2 (December 31, 2023): 320–30. http://dx.doi.org/10.31571/saintek.v12i2.6678.

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Penelitian ini dilakukan di SMA Yasmida Ambarawa di kelas XI. Materi matematika bertujuan untuk memahami efek dari kemampuan penalaran terhadap prestasi belajar; efek kemampuan pemecahan masalah matematis terhadap prestasi serta efek secara bersama-sama kemampuan penalaran dan kemampuan pemecahan masalah matematika. Analisis data dilakukan menggunakan SPSS 25 menggunakan model regresi garis ganda. Penelitian dilakukan di kelas XI dengan jumlah keseluruhan 31 siswa di semester gasal TA 2021/2022. SMA Yasmida Ambarawa merupakan SMA swasta satu-satunya di kecamatan Ambarawa Pringsewu Lampung. Lokasi SMA ini berdekatan dengan SMA N 1 Ambarawa, SMK Yasmida dan SMK Muhammadiyah sehingga jumlah siswa di SMA Yasmida Ambawara relatif sedikit. Temuan penelitian yang disusun secara ringkas meliputi: 1) Ada perbedaan efek kemampuan penalaran matematika siswa dengan pretasi siswa dalam pembelajaran. 2) Ada perbedaan dalam kemampuan menyelesaikan masalah matematika pada prestasi siswa. 3) Terdapat pengaruh kemampuan penalaran matematis beserta kemampuan pemecahan dalam masalah bersama-sama pada pretasi belajar siswa di kelas X1 pada materi Matrik SMA Yasmida Ambarawa saat pembelajaran. Hasil dari R Square adalah 98,5% sehingga prestasi siswa memiliki dampak yang signifikan pada materi matrik.
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Solehudin, Mohammad. "Pengaruh Motivasi Kerja Guru dan Budaya Organisasi Sekolah Terhadap Kinerja Guru SMA Negeri 1 Petarukan Kabupaten Pemalang." Jurnal Terapan Pendidikan Dasar dan Menengah 1, no. 1 (September 30, 2021): 20–26. http://dx.doi.org/10.28926/jtpdm.v1i1.56.

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Permasalahan dalam penelitian ini adalah: (1) apakah terdapat pengaruh motivasi kerja guru terhadap kinerja guru SMA Negeri 1 Petarukan? (2) apakah terdapat pengaruh budaya organisasi sekolah terhadap kinerja guru SMA Negeri 1 Petarukan? (3) apakah terdapat pengaruh motivasi kerja guru dan budaya organisasi sekolah secara bersama-sama terhadap kinerja guru SMA Negeri 1 Petarukan? Penelitian ini bertujuan untuk: (1) mengetahui adanya pengaruh motivasi kerja guru terhadap kinerja guru SMA Negeri 1 Petarukan, (2) mengetahui adanya pengaruh budaya organisasi sekolah terhadap kinerja guru SMA Negeri 1 Petarukan, (3) mengetahui adanya pengaruh motivasi kerja guru dan budaya organisasi sekolah secara bersama-sama terhadap kinerja guru SMA Negeri 1 Petarukan. Populasi pada penelitian ini adalah guru Pegawai Negeri Sipil, yang dianggap homogen di SMA Negeri 1 Petarukan yang berjumlah 69 orang, dengan teknik Total Sampling. Metode pengumpulan data yang digunakan adalah metode kuesioner. Analiis data yang digunakan adalah analisis deskriptif, uji persyaratan serta uji hipotesis yang meliputi analisis Uji T dan regresi sederhana, digunakan untuk menguji secara parsial pengaruh motivasi kerja guru dan budaya organisasi sekolah terhadap kinerja guru SMA Negeri 1 Petarukan. Regresi linear berganda untuk mengetahui pengaruh motivasi kerja guru dan budaya organisasi sekolah secara bersama-sama terhadap kinerja guru SMA Negeri 1 Petarukan. Adapun untuk menganalisis data digunakan fasilitas program SPSS for Window Release 22. Dari hasil penelitian dapat diketahui bahwa rata-rata perolehan skor rata-rata perolehan skor motivasi kerja guru 143,38 termasuk kategori cukup baik; rata-rata perolehan skor budaya organisasi sekolah 135,25 termasuk dalam kategori cukup baik; dan rata-rata perolehan skor kinerja guru SMA Negeri 1 Petarukan 153,96 termasuk dalam kategori cukup baik. Hasil uji persyaratan regresi dari data penelitian diperoleh data berdistribusi normal, linier, tidak multikolinier, dan tidak terjadi heteroskedastisitas. Dari uji hipotesis ditemukan bahwa (1) terdapat pengaruh motivasi kerja guru terhadap kinerja guru; (2) terdapat pengaruh antara budaya organisasi terhadap kinerja guru; dan (3) terdapat pengaruh motivasi kerja guru dan budaya organisasi sekolah secara bersama-sama terhadap kinerja guru.
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Andriyani, Sy Silvia. "Amanat Teks Anekdot menurut Interpretasi Siswa dalam Pembelajaran Sekilas Menggunakan Bahan Ajar Sederhana." Jurnal Pembelajaran Bahasa dan Sastra 3, no. 3 (May 27, 2024): 381–88. http://dx.doi.org/10.55909/jpbs.v3i3.594.

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Penelitian ini bertujuan untuk mendeskripsikan: 1) amanat utama teks anekdot menurut interpretasi siswa SMA Negeri 3 Batam; 2) sama-tidaknya amanat utama teks anekdot menurut interpretasi siswa SMA Negeri 3 Batam per kelompok sampel; 3) amanat pendukung teks anekdot menurut interpretasi siswa SMA Negeri 3 Batam; 4) sama-tidaknya amanat pendukung teks anekdot menurut interpretasi siswa SMA Negeri 3 Batam per kelompok sampel. Penelitian berlangsung di semester genap tahun pelajaran 2023/2024. Populasi penelitian ini adalah para siswa kelas X yang mengikuti pembelajaran amanat teks anekdot melalui pembelajaran sekilas menggunakan bahan ajar sederhana yang mengumpulkan instrumen kuesioner tentang amanat teks anekdot. Mereka berjumlah 99 siswa dari 121 siswa di kelas X paralel. Sampel ditetapkan sebanyak 81 siswa; terbagi dari tiga kelas paralel. Data amanat utama dan amanat pendukung teks anekdot menurut interpretasi siswa SMA Negeri 3 Batam dikumpulkan menggunakan instrumen kuesioner tertutup 6 opsi. Instrumen lain: 1) bahan ajar sederhana; 2) daftar cek-ricek untuk memvalidasi data dan hasil analisis data. Hasil penelitian: 1) amanat utama teks anekdot menurut interpretasi siswa SMA Negeri 3 Batam adalah ‘pengetahuan tidak memandang umur’; 2) amanat utama teks anekdot menurut interpretasi siswa SMA Negeri 3 Batam tidak berbeda per kelompok sampel; 3) amanat pendukung teks anekdot menurut interpretasi siswa SMA Negeri 3 Batam adalah ‘akuilah kebenaran’; 4) amanat pendukung teks anekdot menurut interpretasi siswa SMA Negeri 3 Batam berbeda per kelompok sampel.
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Dissertations / Theses on the topic "SMA"

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Vouillot, Léna. "Développement des motoneurones chez un modèle amphibien d'amyotrophie spinale généré à l'aide de nucléases." Thesis, Evry-Val d'Essonne, 2014. http://www.theses.fr/2014EVRY0038.

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Les amyotrophies spinales proximales sont des maladies génétiques neuromusculaires caractérisées par la dégénérescence des motoneurones spinaux et une atrophie des muscles squelettiques proximaux. La perte de fonction du gène smn1, un gène essentiel à la survie des motoneurones, entraîne une réduction drastique du niveau de protéine SMN et est, à l’origine des symptômes observés chez les patients. L'amphibien anoure Xenopus tropicalis constitue un très bon petit animal modèle pour étudier cette maladie ainsi que le développement des motoneurones. En effet une diminution de la production de la protéine SMN via l’utilisation de morpholinos a permis de montrer chez les têtards, des défauts de migration des motoneurones ainsi qu’une atrophie des muscles caudaux. Pour développer un modèle héritable de SMA, nous avons utilisé des nucléases tels que les ZFN ou le système CRISPR/Cas pour générer des mutations du gène smn chez Xenopus tropicalis. Nous avons conçu les outils moléculaires pour induire différentes mutations du gène smn avec des ZFN ou le système CRISP/Cas9. Nous avons ensuite validé l'efficacité de ces nucléases dans des embryons in vivo et développé une méthode de recherche de mutations basée sur l’utilisation des endonucléases T7EI et Surveyor. Nous avons obtenu un animal fondateur mutant qui permettra de générer des embryons homozygotes pour la mutation. En parallèle, nous avons développé une lignée transgénique chez Xenopus tropicalis permettant de visualiser les populations de motoneurones spinaux, pour mieux caractériser les animaux mutants smn in vivo. La combinaison de ces deux lignées permettra de mieux comprendre la physiopathologie motoneuronal liée à des mutations de smn
Spinal muscular atrophy (SMA) is a neurodegenerative disease characterized by motor neuron loss and skeletal muscle atrophy. In human the loss of function of the smn1 gene, the main supplier of survival motor neuron protein (SMN), leads to reduced levels of SMN and eventually to SMA. The anuran amphibian Xenopus tropicalis is a good animal model for the study of SMA and motor neurons development. Indeed the inhibition of the production of SMN using antisense morpholinos leads to caudal muscular atrophy in tadpoles. To develop an inheritable SMA model, we edited the smn gene in X. tropicalis using zinc-finger nucleases (ZFNs) and CRISPR/Cas system. As a first step, we designed the molecular tools needed to induce mutations of the smn gene using ZFN and CRISPR/cas9. Next we probed the efficiency of these tools and developed a method to identify mutations using T7EI and Surveyor endonucleases. We obtained a mutant frog and thus we will be able to produce homozygous mutant embryos for smn. In parallel we developed a transgenic line of Xenopus tropicalis frogs in which we can image motor neurons populations in vivo. The combination of both lines should enable to increase our knowledge and understanding of motor neuron physiopathology due to smn mutations
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Henriques, Moreira Daniel. "SimPatrol: um simulador de sistemas multiagentes para o patrulhamento." Universidade Federal de Pernambuco, 2008. https://repositorio.ufpe.br/handle/123456789/2248.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico
Apesar de sistemas multiagentes estarem se tornando cada vez mais comuns no desenvolvimento de software, há ainda que se chegar a um consenso sobre como modelar e comparar diferentes soluções de sistemas multiagentes para um mesmo problema. Em outras palavras, os pesquisadores de tal área ainda estão à procura de benchmarks que sirvam de referência para a comparação de abordagens distintas. Dada a importância do estabelecimento de benchmarks para sistemas multiagentes, uma questão que surge entre os pesquisadores da área de patrulhamento é a possibilidade e o potencial do problema do patrulhamento como um destes benchmarks. Apesar da quantidade de trabalho produzido até este ponto, tem-se encontrado dificuldades para comparar precisamente as soluções propostas para o patrulhamento. Estas dificuldades remetem principalmente à ausência de ferramentas (em especial um simulador unificado) que permitam aos estudiosos se concentrarem na solução do problema em si, e não na sua representação. Partindo deste cenário, este trabalho tem como objetivo discutir o estabelecimento do patrulhamento enquanto um benchmark para sistemas multiagentes. Adicionalmente, como um primeiro passo no sentido de preencher as lacunas que dificultam tal estabelecimento, introduz-se o SimPatrol, um novo simulador voltado para a tarefa de patrulhamento, fortemente inspirado pelos simuladores da RoboCup e TAC. Novos resultados são produzidos a partir de uma avaliação de parte das técnicas propostas pelas pesquisas anteriores frente às novas funcionalidades implementadas pelo simulador, em especial a inédita medida de ociosidade dos vértices, que leva em consideração o tempo de raciocínio gasto pelos patrulheiros
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Paredes, Matta Elizabeth Victoria Adela. "Comportamiento mecánico de las mezclas tipo SMA (STONE MASTIC ASPHALT)." Bachelor's thesis, Universidad Ricardo Palma. Programa Cybertesis PERÚ, 2010. http://cybertesis.urp.edu.pe/urp/2010/paredes_ev/html/index-frames.html.

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Pachalla, Seshadri Rajagopal. "Analysis of oscillating flow cooled SMA actuator." Texas A&M University, 2004. http://hdl.handle.net/1969.1/2669.

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Shape Memory Alloys (SMA) are a group of metallic alloys that have the ability to return to some previously defined shape or size when subjected to an appropriate thermal cycling procedure. In recent years there has been a lot of research on the development of small, light and, yet, powerful actuators for use in areas like robotics, prosthetics, biomimetics, shape control and grippers. Many of the miniaturized conventional actuators do not have sufficient power output to be useful and SMAs can be used advantageously here. The widespread use of SMAs in actuators is limited by their low bandwidth. Use of SMAs in two-way actuators requires that they undergo thermal cycling (heating and cooling). While SMAs can be heated quickly by resistive heating, conventional convection cooling mechanisms are much slower as the exothermic austenitic to martensitic phase transformation is accompanied by the release of significant amount of latent heat. While a number of cooling mechanisms have been studied in SMA actuator literature, most of the cooling mechanisms involve unidirectional forced convection. This may not be the most effective method. Oscillating flow in a channel can sometimes enhance heat transfer over a unidirectional flow. One possible explanation for this heat transfer enhancement is that the oscillatory flow creates a very thin Stokes viscous boundary-layer and hence a large time-dependent transverse temperature gradient at the heated wall. Therefore heat transfer takes place at a large temperature difference, thereby enhancing the heat transfer. In this work, the heat transfer from an SMA actuator under an oscillating channel is investigated and is compared to steady, unidirectional flow heat transfer. Oscillating flow is simulated using a finite volume based method. The resulting velocity field is made use of in solving the heat transfer problem using a finite difference scheme. A parametric study is undertaken to identify the optimal flow conditions required to produce the maximum output for a given geometry of the SMA actuator. The latent heat of transformation of the SMA is accounted for by means of a temperature dependent specific heat.
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Dano, Marie-Laure. "SMA-Induced Deformations In general Unsymmetric Laminates." Diss., Virginia Tech, 1997. http://hdl.handle.net/10919/30390.

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General unsymmetric laminates exhibit large natural curvatures at room temperature. Additionally, inherent to most unsymmetric laminates is the presence of two stable configurations. Multiple configurations and stability issues arise because of the geometric nonlinearities associated with the large curvatures. The laminate can be changed from one stable configuration to the other by a simple snap-through action. This situation offers the opportunity to use shape memory alloys (SMA) attached to the laminate to generate the snap-through forces and change the shape of the laminate on command. Presented is a model which can predict SMA-induced deformations in general unsymmetric laminates and, particularly, the occurrence of the snap through. First, a methodology is developed to predict the deformations of flat general unsymmetric epoxy-matrix composite laminates as they are cooled from their elevated cure temperature. Approximations to the strain fields are used in the expression for the total potential energy, and the Rayleigh-Ritz approach is used to study equilibrium. To further study the laminate deformations, finite-element analyses are performed. Experimental results are presented which confirm the predictions of the developed theory and the finite-element analyses regarding the existence of multiple solutions and the magnitude of the deformations. Results are compared with those of several other investigators. Next, the deformation behavior of general unsymmetric laminates subjected to applied forces is studied. The principle of virtual work is used to derive the equilibrium equations relating the laminate deformations to the applied forces. By solving the equilibrium equations as a function of the force level, relations between the laminate deformations and the applied force are derived, and the force level at which the laminate changes shape is determined. Finally, an existing SMA constitutive model is implemented into the developed theory to predict the deformations of simple structures to SMA-induced forces. Experiments on a narrow aluminium plate with an externally attached SMA actuator are conducted. The experimental results show good agreement with the predictions from the developed theory. Next, the deformation behavior of general unsymmetric laminates subjected to SMA actuators is predicted using the developed theory. Experiments using SMA actuators to generate the snap through of nsymmetric laminates are conducted. Good correlation with the developed theory is obtained.
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Anjum, Sadaf Saad. "Fabrication of smart intercalated polymer-SMA nanocomposite." Thesis, Cranfield University, 2015. http://dspace.lib.cranfield.ac.uk/handle/1826/9384.

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Mimicking nature gives rise to many important facets of biomaterials. This study is inspired by nature and reports on the fabrication of an intercalated polymer-NiTi nanocomposite that mimics the structural order of urethral tissue performing micturition. PTFE is chosen due to its hydrophobicity, low surface energy, and thermal and chemical stability. NiTi has been selected as a prime candidate for this research due to its excellent mechanical stability, corrosion resistance, energy absorbance, shape memory and biocompatibility. Nanoscale engineering of intercalated nanocomposites is done by PVD sputtering PTFE and NiTi. FTIR spectroscopy confirms that PTFE reforms as polymer chains after sputtering. Suitable PVD sputtering parameters were selected by investigating their influence on deposition rates, microstructure and properties of PTFE and NiTi thin films. PTFE forms stable nanocomposite coatings with NiTi and displays favourable surface interactions, known as ‘intercalation’. Intercalated PTFE-NiTi films were fabricated as layered and co-sputtered thin films. Co-sputtered nanocomposites contained nearly one-third vacant sites within its internal microstructure because of intercalation while intercalation introduced minute pits in fibrous NiTi columns of layered nanocomposites. These pits allow PTFE to extend their chains and crosslinks, resulting in microstructural and functional changes in the thin films. Intercalated PTFE-NiTi nanocomposites offer a close match to the natural tissue in terms of responding to the fluid contact (wetting angle modifications), and allow the soft and hard matter to incorporate in one framework without any chemical reactions (intercalation). An intercalated microstructure in co-sputtered and layered nanocomposites was verified by EDS-SEM and EDS-TEM techniques. The functional responses were witnessed by changes in water contact angle (WCA) and coefficient of friction (CoF) values measured on the film surface. The WCA (99°) and CoF (0.1 – 0.2) of the intercalated nanocomposite (sample PNT12) were different to the NiTi (top layer). WCA and CoF indicate the internal microstructural interactions because of intercalation. Although the pseudoelastic behaviour of NiTi can provide additional fluid response but the difficulty is an absence of crystallinity in as-deposited NiTi, and the heat treatment that melts PTFE. However, DSC and XRD techniques were employed to find the optimum NiTi composition and transition temperatures for phase transformation related to pseudoelasticity. This study provides the basis to incorporate the shape memory (pseudoelasticity or thermal shape memory effect (shape memory effect)) features of NiTi into the intercalated nanocomposite in future. The intercalated PTFE-NiTi nanocomposite reveals a fascinating research precinct, having the response generating characteristics similar to that of natural tissue.
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Quenum, José Ghislain. "Conception et éxécution d' interactions dans les SMA [Systèmes multi-agents] : spécialisation et sélection de protocoles génériques." Paris 6, 2005. http://www.theses.fr/2005PA066457.

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Yariz, Kemal Oral. "The Chronicles of X-Linked Spinal Muscular Atrophy: The Linkage, The Gene and The SMN Complex." Scholarly Repository, 2008. http://scholarlyrepository.miami.edu/oa_dissertations/115.

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Spinal Muscular Atrophy (SMA) is an autosomal recessive motor neuron disease. SMA is associated with homozygous mutations in the Survival of Motor Neuron gene I (SMN1). SMN protein does not appear to exist in cells in isolation but associates with several proteins to form a large multi-protein complex. The functions of SMN complex include assembly, metabolism and transport of diverse classes of ribonucleoproteins. X- Linked Spinal Muscular Atrophy is a rare congenital disorder characterized by multiple joint contractures. It is associated with hypotonia, areflexia, chest deformities and congenital joint contractures. A candidate interval was defined for XL-SMA in Xp11.3-Xq11.2 in 1995. The purpose of this study was to refine the XL-SMA gene region and discover the XL-SMA gene. In addition to that, the gene product was investigated to delineate the genotype-phenotype correlation. My studies were focused on single nucleotide polymorphism (SNP) analysis. The candidate gene interval was refined by studying 14 SNPs in the three largest families. This analysis revealed a recombination event which allowed elimination of the NDP gene. Significantly positive LOD scores were obtained from these SNP studies. The exons and exon-intron boundaries of 12 genes were screened. No mutations were found in these genes in affected male samples. In late 2006, UBE1 (Ubiquitin activating enzyme 1) was discovered as the XL-SMA gene. UBE1 protein is responsible for the first step of ubiquitination of proteins in a cell. To investigate a possible common molecular mechanism between SMA and XL-SMA, proteins in the SMN Complex in XL-SMA patient cell lines were studied. SMN and Gemin3 protein levels were found to be consistently lower in XL-SMA patient cell lines (lymphoblasts) compared to healthy cell line. These results imply that there may be a common disease mechanism. To understand if the SMN and Gemin3 RNA levels decrease. RNA expression studies were performed. These studies confirmed that there is no difference of RNA expression of SMN and Gemin3 in XL-SMA cell lines when compared to healthy cell lines. As for UBE1, the same experimental procedure for SMN Complex proteins were repeated with antibodies to UBE1 to determine if there is any decline of UBE1 protein levels in XL-SMA patient cell lines compared to a healthy cell line. There was a decline in protein levels of UBE1 in XL-SMA patients. Two possible models are proposed for a molecular mechanism in XL-SMA: 1) UBE1 involves in degradation of a protein which downregulates SMN Complex (or a protein which stabilizes SMN Complex). When UBE1 is mutated, the protein in question is not degraded and this results in excess downregulation of SMN Complex (maybe via a pathway involving SMN-Gemin3 interaction). 2) UBE1 and UBA6 interact with the proteins of SMN Complex as they monoubiquinate them for different cellular processes. When UBE1 is mutated, UBA6 cannot compensate the deficiency of UBE1, which in turn disrupts normal cellular RNA metabolism required for motor neuron development and survival.
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Miguel-Aliaga, Irene. "Spinal muscular atrophy : of flies, worms and men." Thesis, University of Oxford, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.343478.

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Pardon, Gaspard. "A feasibility Study of SMA Powder Composite Actuators." Thesis, KTH, Mikrosystemteknik, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-91283.

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Books on the topic "SMA"

1

Administração, Rio de Janeiro (Brazil) Secretaria Municipal de. Resoluções SMA. Rio de Janeiro: Prefeitura da Cidade do Rio de Janeiro, Superintendência Municipal de Administração, Superintendência de Documentação, 1986.

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Therkildsen, Agnete. Sma glimt. [Copenhagen]: Foreningen Danmarks Folkeminder, 1985.

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Noer, Arifin C. Bunga-bunga SMA. [Jakarta]: Budiman Permai Film, 1989.

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Indonesia. Direktorat Pembinaan Sekolah Menengah Atas. Panduan penyelenggaraan program rintisan SMA bertaraf internasional (R-SMA-BI). 3rd ed. Jakarta: Departemen Pendidikan Nasional, Direktorat Jenderal Manajemen Pendidikan Dasar dan Menengah, Direktorat Pembinaan Sekolah Menengah Atas, 2009.

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Team Penyusunan Naskah Pelajaran Bahasa Bali., ed. Widia basita untuk SMA. [Denpasar: Proyek Peningkatan Mutu Pendidikan, Pemerintah Daerah Tingkat I Bali, 1986.

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Iskandar, Eddy D. Gita cinta dari SMA. Menteng, Jakarta: GagasMedia, 2004.

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s, Philippos D. Drakontaeide. Chronia proype resias: Anagno sma. Athe na: Estias, 1988.

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S, I. Wayan A. Silabus program pembelajaran SMA/MA. Jakarta: Cipta Jaya, 2008.

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Galau remaja di SMA: Skenario. [Jakarta]: Kanta Indah Film, 1985.

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Badrika, I. Wayan. Sejarah nasional Indonesia dan umum SMA. Ciracas, Jakarta: Erlangga, 2004.

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Book chapters on the topic "SMA"

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Gooch, Jan W. "SMA." In Encyclopedic Dictionary of Polymers, 672. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_10781.

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Ahmadian, Amir, Angela E. Downes, and A. Samy Youssef. "SMA." In Encyclopedia of Otolaryngology, Head and Neck Surgery, 2518. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-23499-6_200114.

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Leung, Alexander K. C., Cham Pion Kao, Andrew L. Wong, Alexander K. C. Leung, Thomas Kolter, Ute Schepers, Konrad Sandhoff, et al. "SMA." In Encyclopedia of Molecular Mechanisms of Disease, 1946. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-29676-8_6849.

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Kohl, Manfred. "SMA Microvalves." In Microtechnology and MEMS, 96–160. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-662-09875-2_5.

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Langbein, Sven, and Alexander Czechowicz. "Future Perspectives of SMA and SMA Valves." In Shape Memory Alloy Valves, 191–207. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-19081-5_12.

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Kohl, Manfred, Berthold Krevet, and Elmar Just. "SMA Microgripper System." In Transducers ’01 Eurosensors XV, 710–13. Berlin, Heidelberg: Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/978-3-642-59497-7_169.

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Andani, Masood Taheri, Francesco Bucchi, and Mohammad H. Elahinia. "SMA Actuation Mechanisms." In Shape Memory Alloy Actuators, 85–123. Chichester, UK: John Wiley & Sons, Ltd, 2015. http://dx.doi.org/10.1002/9781118426913.ch3.

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Kohl, Manfred. "SMA Linear Actuators." In Microtechnology and MEMS, 161–218. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-662-09875-2_6.

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Gooch, Jan W. "SMA PTB Alloy." In Encyclopedic Dictionary of Polymers, 672. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_10784.

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Leung, Alexander K. C., Cham Pion Kao, Andrew L. Wong, Alexander K. C. Leung, Thomas Kolter, Ute Schepers, Konrad Sandhoff, et al. "SMA Type I." In Encyclopedia of Molecular Mechanisms of Disease, 1946. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-29676-8_6846.

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Conference papers on the topic "SMA"

1

Juchmes, Roland, and Pierre Leclercq. "EsQUIsE-SMA." In the 16th conference. New York, New York, USA: ACM Press, 2004. http://dx.doi.org/10.1145/1148613.1148640.

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Boller, Christian, Peter Konstanzer, Yuji Matsuzaki, and Tadashige Ikeda. "Damping in SMA-reinforced composites using SMA intrinsic properties." In SPIE's 8th Annual International Symposium on Smart Structures and Materials, edited by Anna-Maria R. McGowan. SPIE, 2001. http://dx.doi.org/10.1117/12.429689.

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Sittner, P., L. Heller, J. Pilch, P. Sedlak, M. Frost, Y. Chemisky, A. Duval, et al. "Roundrobin SMA modeling." In ESOMAT 2009 - 8th European Symposium on Martensitic Transformations. Les Ulis, France: EDP Sciences, 2009. http://dx.doi.org/10.1051/esomat/200908001.

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Nakayasu, Akira, and Kiyoshi Tomimatsu. "SMA motion display." In ACM SIGGRAPH 2010 Posters. New York, New York, USA: ACM Press, 2010. http://dx.doi.org/10.1145/1836845.1836876.

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Singh, Bhavneet, Gurkirat Singh, and Arvind Lee. "Acute SMA Thrombosis." In PAIRS 2023 Annual Congress. Thieme Medical and Scientific Publishers Pvt. Ltd., 2023. http://dx.doi.org/10.1055/s-0043-1763384.

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Park, Jungkyu, Leon M. Headings, Marcelo J. Dapino, Jeffery W. Baur, and Gyaneshwar P. Tandon. "Analysis of Shape Memory Polymer-Alloy Composites: Modeling and Parametric Studies." In ASME 2012 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/smasis2012-8257.

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Shape memory composites (SMCs) based on shape memory alloys (SMAs) and shape memory polymers (SMPs) are interesting due to their controllable temperature-dependent mechanical properties. The complementary characteristics of SMAs and SMPs can be used to create materials or systems with shape recovery created by the SMA and shape fixity provided by the SMP. In this research, three SMC operating regimes are identified and the behavior of SMC structures is analyzed by focusing on composite fixity and interfacial stresses. Analytical models show that certain SMPs can achieve sufficient shape fixing. COMSOL Multi-Physics simulations are in agreement with analytical expressions for shape fixity and interfacial stresses. Analytical models are developed for an end-coupled linear SMP-SMA two-way actuation system.
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Mirzaeifar, Reza, Reginald DesRoches, and Arash Yavari. "Exact Solution for Pure Torsion of SMA Curved Bars With Application to Analyzing SMA Helical Springs." In ASME 2011 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. ASMEDC, 2011. http://dx.doi.org/10.1115/smasis2011-5184.

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In this paper, the pure torsion of SMA curved bars with circular cross sections is studied analytically. First, a three-dimensional phenomenological macroscopic constitutive model for polycrystalline SMAs is reduced to the one-dimensional pure shear case and then a closed-form solution for torsional response of SMA curved bars in loading and unloading is obtained. The effect of a direct shear force in the cross section is also considered in the solution which enables the formulation for analyzing SMA helical springs. Several case studies are presented in order to investigate the accuracy of the proposed method in predicting the torsional response of SMA curved bars, the stress distributions, and analyzing SMA helical springs.
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Daghash, Sherif, Osman E. Ozbulut, and Muhammad M. Sherif. "Shape Memory Alloy Cables for Civil Infrastructure Systems." In ASME 2014 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/smasis2014-7562.

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Shape memory alloys (SMAs) have attracted a great deal of attention as a smart material that can be used in various civil engineering applications due to their favorable mechanical properties such as ability to undergo large deformations, high corrosion and fatigue resistance, good energy dissipating capacity, and excellent re-centering ability. In contrast to the use of SMAs in the biomedical, mechanical and aerospace applications, which requires mostly small diameter of material, the larger size bars are usually needed in a civil engineering application. It is well known that properties of large-section SMA bars are generally poorer than those of wires due to difficulties in material processing. Furthermore, large diameter SMA bars are more expensive than thin SMA wires. Shape memory alloy cables have been recently developed as an alternative and new structural element. They leverage the superior mechanical characteristics of small diameter SMAs into large-size structural tension elements and possess several advantages over SMA bars. This study explores the performance of NiTi SMA cables and their potential use in civil engineering. The SMA cable, which has a diameter of 8 mm, is composed of 7 strands and each strand has 7 wires with a diameter of 0.885 mm. The uniaxial tensile tests are conducted at various loading rates and strain amplitudes to characterize the superelastic properties of the SMA cable and study the rate-dependent mechanical response of the SMA cable under dynamic loads. An optical digital image correlation measurement system and an infrared thermal imaging camera are employed to obtain the full-field strain and temperature fields. Potential applications of SMA cables in civil infrastructure applications are discussed and illustrated.
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Atasoy, Ahmet, Shavkat Kuchimov, Burak Guclu, Mehmed Ozkan, Ersin Toptas, and Erkan Kaplanoglu. "SMA actuator design considerations." In 2018 Electric Electronics, Computer Science, Biomedical Engineerings' Meeting (EBBT). IEEE, 2018. http://dx.doi.org/10.1109/ebbt.2018.8391428.

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Ammar, Lara I., Bilal Y. Kaddouh, Mariam K. Mohanna, and Imad H. Elhajj. "SAS: SMA Aiding Sleeve." In 2010 IEEE International Conference on Robotics and Biomimetics (ROBIO). IEEE, 2010. http://dx.doi.org/10.1109/robio.2010.5723568.

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Reports on the topic "SMA"

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Lee, Jusang, John E. Haddock, and Jongmyung Jeon. Development of Volumetric Acceptance and Percent Within Limits (PWL) and Criteria for Stone Metrix Asphalt (SMA) Mixtures in Indiana. Purdue University, 2022. http://dx.doi.org/10.5703/1288284317580.

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SMA is to be designed based on SMA volumetric properties in terms of air voids content (Va), voids in the mineral aggregate (VMA), and adequate stone-on-stone contact. For construction quality assurance (QA) purposes, INDOT currently accepts SMAs based on aggregate gradation and asphalt binder content. Thus, there is a discrepancy between SMA design criteria and construction acceptance. To better align design and construction, it is necessary to consider SMA volumetric properties in the use of QA. For HMA mixtures, INDOT has already transitioned from volumetric QA acceptance procedures to PWL. Today, SMA still uses adjustment points not based on robust statistics for QA acceptance. SMA QA samples and QA data sets were collected from projects constructed in 2019 and tested in the laboratory. The Hamburg Wheel Track Test (HWTT) was performed on the 2019 QA samples to evaluate SMA rutting performance. Additionally, the PWL for HMA was applied to the 2019 SMA QA data to see if the HMA PWL method would work for SMA. Possible SMA QA measurements were compared to past QA data and HMA QA measurements. In addition, Voids in the Coarse Aggregate (VCA) was evaluated as a possible SMA QA measurement. Finally, using the suitable QA measurements for SMA, a PWL parameter study was performed to find PWL that provides a Pay Factor (PF) equivalent to the current SMA Adjustment Point (AP) PF. The current SMA QA measurements (binder content, gradation, and density) are recommended for Indiana's SMA PWL. Based on the results of applying PWL to SMA QA data for the last four years, SMA PWL specification limits are recommended. Also, the SMA PF equations are suggested to get the SMA PWL to have PF equivalent to the current AP PF.
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Lagoudas, D. C., and O. K. Rediniotis. Highly-Compact SMA Actuators A Feasibiltiy Study of Fuel-Powered and Thermoelectric SMA Actuators. Fort Belvoir, VA: Defense Technical Information Center, December 2003. http://dx.doi.org/10.21236/ada424753.

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Lagoudas, Dimitris C. Fatigue Life and Dynamic Response of SMA Actuators. Fort Belvoir, VA: Defense Technical Information Center, September 2004. http://dx.doi.org/10.21236/ada433226.

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Pfaeffle, H. J., Dimitris C. Lagoudas, Iradj Tadjbakhsh, and Kevin C. Craig. Design of Flexible Rods with Embedded SMA Actuators. Fort Belvoir, VA: Defense Technical Information Center, January 1993. http://dx.doi.org/10.21236/ada260742.

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Matus, Sean, and Daniel Gambill. Automation of gridded HEC-HMS model development using Python : initial condition testing and calibration applications. Engineer Research and Development Center (U.S.), November 2022. http://dx.doi.org/10.21079/11681/46126.

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The US Army Corps of Engineers’s (USACE) Hydrologic Engineering Center-Hydrologic Modeling System (HEC-HMS) rainfall-runoff model is widely used within the research community to develop both event-based and continuous rainfall-runoff models. The soil moisture accounting (SMA) algorithm is commonly used for long-term simulations. Depending on the final model setup, 12 to 18 parameters are needed to characterize the modeled watershed’s canopy, surface, soil, and routing processes, all of which are potential calibration parameters. HEC-HMS includes optimization tools to facilitate model calibration, but only initial conditions (ICs) can be calibrated when using the gridded SMA algorithm. Calibrating a continuous SMA HEC-HMS model is an iterative process that can require hundreds of simulations, a time intensive process requiring automation. HEC-HMS is written in Java and is predominantly run through a graphical user interface (GUI). As such, conducting a long-term gridded SMA calibration is infeasible using the GUI. USACE Construction Engineering Research Laboratory (CERL) has written a workflow that utilizes the existing Jython application programming interface (API) to batch run HEC-HMS simulations with Python. The workflow allows for gridded SMA HEC-HMS model sensitivity and calibration analyses to be conducted in a timely manner.
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Wang, Bin, and Songye Zhu. EXPERIMENTAL INVESTIGATION OF SELF-CENTERING STEEL COLUMNS WITH SMA BOLTS. The Hong Kong Institute of Steel Construction, December 2018. http://dx.doi.org/10.18057/icass2018.p.103.

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Lagoudas, Dimitris C. Thermomechanical Modeling and Experimentation for SMA Actuators under Cyclic Loading. Fort Belvoir, VA: Defense Technical Information Center, July 2002. http://dx.doi.org/10.21236/ada405599.

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De Vivo, Darryl C. Columbia SMA Project: A Randomized, Control Trial of the Effects of Exercise on Motor Function and Strength in Patients with Spinal Muscular Atrophy (SMA). Fort Belvoir, VA: Defense Technical Information Center, June 2012. http://dx.doi.org/10.21236/ada563380.

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Veenis, Steven John. Certification of Installation of Enhanced Control Measures at ACID-SMA-2. Test accounts, August 2017. http://dx.doi.org/10.2172/1374273.

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Veenis, Steven John. Certification of Installation of Enhanced Control Measures at ACID-SMA-2. Test accounts, August 2017. http://dx.doi.org/10.2172/1374290.

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