13197 research outputs found
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COVID-19 discussions in social media: cross-country comparison
Get PDF奈良先端科学技術大学院大学博士(工学)doctoral thesi
Context integration and geometrically correct rendering on Video See-through Augmented Reality displays
Get PDF奈良先端科学技術大学院大学博士(工学)doctoral thesi
Characterisation of Ncam1 Function in Zebrafish Posterior Lateral Line and Olfactory Bulb
Get PDF奈良先端科学技術大学院大学博士(バイオサイエンス)doctoral thesi
Petal abscission is promoted by jasmonic acid-induced autophagy at Arabidopsis petal bases
No full textIn angiosperms, the transition from floral-organ maintenance to abscission determines reproductive success and seed dispersion. For petal abscission, cell-fate decisions specifically at the petal-cell base are more important than organ-level senescence or cell death in petals. However, how this transition is regulated remains unclear. Here, we identify a jasmonic acid (JA)-regulated chromatin-state switch at the base of Arabidopsis petals that directs local cell-fate determination via autophagy. During petal maintenance, co-repressors of JA signaling accumulate at the base of petals to block MYC activity, leading to lower levels of ROS. JA acts as an airborne signaling molecule transmitted from stamens to petals, accumulating primarily in petal bases to trigger chromatin remodeling. This allows MYC transcription factors to promote chromatin accessibility for downstream targets, including NAC DOMAIN-CONTAINING PROTEIN102 (ANAC102). ANAC102 accumulates specifically at the petal base prior to abscission and triggers ROS accumulation and cell death via AUTOPHAGY-RELATED GENEs induction. Developmentally induced autophagy at the petal base causes maturation, vacuolar delivery, and breakdown of autophagosomes for terminal cell differentiation. Dynamic changes in vesicles and cytoplasmic components in the vacuole occur in many plants, suggesting JA$2013NAC-mediated local cell-fate determination by autophagy may be conserved in angiosperms.journal articl
Enhancement of thermoelectric properties in carbon nanotube yarns by dispersion methods and molecular junctions
Get PDF奈良先端科学技術大学院大学博士(工学)doctoral thesi
Python プログラミング エンシュウ ニ オケル プログラミング ケイケンド ト エラー シュウセイ ジカン ノ カンケイ ブンセキ
Get PDF本研究では，プログラミング教育者の指導支援を目的として，プログラミング初学者が遭遇するエラーの修正プロセスを，修正に要した時間の観点から分析する．プログラミング初学者にとって，コーディングにおけるエラーとの遭遇は学習の大きな障壁となりやすい．同じ種類のエラーに繰り返し遭遇することが，初学者が学習する上での障害の度合いを示す有力な指標の一つになりうるとの指摘もなされているが，繰り返されるエラーについての詳細な分析は少ない．プログラミング初学者がどのようなエラーに繰り返し遭遇し，その解決に困難さを感じているのかを明らかにすることは，効果的なプログラミング学習の実現に大きく貢献する．著者が所属する大学院におけるプログラミング演習において，受講者を上級者，中級者，初級者に分けた上で，エラーの種類毎の修正時間，コード編集量，一定時間コードの提出がないことを示す離席頻度をそれぞれ定量化，比較し，離席につながるエラーの数と種類，および，演習の進行に伴うエラー修正時間の変化の分析を行った．その結果，エラー修正時間には初級者と上級者の間で差がある一方で，コード編集量にはほとんど差が見受けられなかった．また，離席については上級者に対して初学者の頻度が高いことが明らかになった．演習の進行に伴うエラー修正時間の変化については，修正時間が短くなったエラーは存在しなかった．この結果は，教育者が文法エラー以外のエラーの修正作業を支援する必要性を示唆している．technical repor
Comparing Execution Trace Using Merkle- Tree to Detect Backward Incompatibilities
No full textThe use of libraries is crucial in software development. Library users should update their libraries to address bugs and vulnerabilities that are fixed in newer versions. However, updating libraries can lead to software malfunction due to backward incompatibilities. Therefore, it is necessary to carefully examine the changes in the library, identify incompatible behavior, and modify the software accordingly when applying updates. Identifying the cause of incompatibility is challenging as updates often include changes to APIs other than the one used by the user. We propose a method to detect candidate library methods that cause backward incompatibilities in client-side library updates using Merkle tree. Our approach involves conducting unit tests on the client software, which includes library API calls, before and after the library updates. The execution traces of these tests are collected at the Java bytecode instruction level. By constructing Merkle trees for each execution trace before and after the update, we efficiently compare the control structures and return values to identify the differences indicating backward incompatibilities. To validate the effectiveness of our method, we conducted a case study on three instances of incompatibility in open-source software.conference pape
トウジョウシャ ノ イドウ カンカク ノ ケイゲン ニ ヨル カイテキ ナ ジドウ ウンテン カンキョウ ノ コウチク
Get PDF自動運転時では，運転手は運転操作から解放され，搭乗者となり，移動時間をより自由に活用することが可能となる．車内での活動時においても搭乗者の安全性や効率性と共に快適性を考えることは重要である．本研究では，自動走行時の不快要因の一つである車両からの加速度刺激によって発生する搭乗者への移動感覚に着目し，走行中の移動感覚を軽減するアルゴリズムの提案によって搭乗者の快適性向上を目指す．移動感覚の軽減手法として，視覚と体感を制御するための没入型半球スクリーンとモーションプラットフォームを組み合わせたXRキャビンの開発と，そのキャビンを使った加速度刺激軽減アルゴリズムの提案を行う．29名の被験者による自動走行実験の結果では，提案手法によって，搭乗者の移動感覚が有意に軽減され，特にカーブで発生する左右方向の移動感覚が軽減される傾向が示された．そのため，加減速が滑らかな通常の自動走行環境において提案手法が有効であることが明らかになった．technical repor
Plant Molecular Phenology and Climate Feedbacks Mediated by BVOCs
Get PDFClimate change profoundly affects the timing of seasonal activities of organisms, known as phenology. The impact of climate change is not unidirectional; it is also influenced by plant phenology as plants modify atmospheric composition and climatic processes. One important aspect of this interaction is the emission of biogenic volatile organic compounds (BVOCs), which link the Earth's surface, atmosphere, and climate. BVOC emissions exhibit significant diurnal and seasonal variations and are therefore considered essential phenological traits. To understand the dynamic equilibrium arising from the interplay between plant phenology and climate, this review presents recent advances in comprehending the molecular mechanisms underpinning plant phenology and its interaction with climate. We provide an overview of studies investigating molecular phenology, genome-wide gene expression analyses conducted in natural environments, and how these studies revolutionize the concept of phenology, shifting it from observable traits to dynamic molecular responses driven by gene$2013environment interactions. We explain how this knowledge can be scaled up to encompass plant populations, regions, and even the globe by establishing connections between molecular phenology, changes in plant distribution, species composition, and climate.journal articl
A Recursive Framework for Evaluating Moments Using Zero-Suppressed Binary Decision Diagrams
No full textThe zero-suppressed binary decision diagram (ZDD) is a compact data structure widely used for the efficient representation of families of sparse subsets. Its inherent recursive structure also facilitates easy diagram manipulation and family operations. Practical applications generally fall under discrete optimization, such as combinatorial problems and graph theory. Given its utility, summarizing the subsets represented in the diagram using key metrics is of great value as this provides valuable insights into the characteristics of the family. The paper proposes a recursive algorithm to extract information on moments from families represented as a ZDD. Given a value for every element in the universe, the value of a subset is first formulated as the sum of the values of its elements. The moments of a family are then calculated as the mean of the exponentiated subset values, akin to the method of moments. Leveraging the structure of the ZDD, the proposed algorithm recursively traverses a given diagram for efficient moments evaluation via multinomial expansion. Its utility is then demonstrated with three classical problems2014offering orders of magnitude increase in computational efficiency relative to conventional method. Overall, the proposed algorithm enhances the functionality of the ZDD by introducing an efficient family operation to uncover the distribution of subset values in a represented family.journal articl