38,444 research outputs found
The influence of welding condition on the microstructure of WC hardfacing coating on carbon steel substrate
No full textTungsten carbide (WC) hardfacing coating technique is widely used to improve the performance of carbon steel blade exposed to acidic and abrasive conditions during production. This paper deals with the influence of welding parameters on the microstructure and carbide distribution of WC. WC hardfacing was deposited onto carbon steel by shielded metal arc welding (SMAW). Welding parameters such as welding current, number of weld layers, electrode drying and base material preheat were the focus of this work. Coating hardness, microstructure and elemental composition were analysed in detail. The effects of the welding parameters on WC hardfacing coating microstructure and hardness value were characterized by scanning electron microscope (SEM) and micro-Vickers hardness tester respectively. The larger carbide growth in overall coating region is mainly dictated by high current (200 A), increased number of weld layers (3 layers) and presence of base material preheat due to sufficient heat energy initiating carbide growth. The investigation also revealed that high current affected the growth of smaller carbide particles in matrix region significantly. Meanwhile, number of weld layers and base material preheat influences were seen during hardfacing with lower welding current. The absence of electrode drying led to uniform smaller carbide distribution in matrix region. It was found that increased number of large carbides and uniformly distributed smaller carbides in WC hardfacing deposit increased the hardness value of the coating
A Data Clustering and Streamline Reduction Method for 3D MR Flow Vector Field Simplification
No full textWith the increasing capability of MR imaging and Computational Fluid Dynamics (CFD) techniques, a significant amount of data related to the haemodynamics of the cardiovascular systems are being generated. Direct visualization of the data introduces unnecessary visual clutter and hides away the underlying trend associated with the progression of the disease. To elucidate the main topological structure of the flow fields, we present in this paper a 3D visualisation method based on the abstraction of complex flow fields. It uses hierarchical clustering and local linear expansion to extract salient topological flow features. This is then combined with 3D streamline tracking, allowing most important flow details to be visualized. Example results of the techniqu
Directive millimetrewave antennas using freeformed ceramic metamaterials in planar and cylindrical forms
No full textIn this paper, we presented applications of millimetrewave EBG structures fabricated using a rapid prototyping technique based on extrusion freeforming. Numerical simulations were performed for the design of millimetrewave woodpile structures. The fabricated woodpile structures have been measured and showed a good agreement with the simulated results. A directive millimetrewave antenna utilising freeformed EBG superstrate with tapered reflectance has been demonstrated. The new EBG superstrate achieves reduced side lobes by reducing the reflection from the edges. We have fabricated for the first time the cylindrical EBG structures and designed a directive fanbeam antenna for high data rate indoor wireless applications at millimetrewave frequencies. The extrusion freeforming is a flexible and versatile technique for realising various non-homogeneous 3D bandgap structures with arbitrary geometries at millimetrewave bands
Special issue: Process safety in times of a pandemic
No full textGreen Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Safety and Security Scienc
Distributed human computation framework for linked data co-reference resolution
No full textDistributed Human Computation (DHC) is a technique used to solve computational problems by incorporating the collaborative effort of a large number of humans. It is also a solution to AI-complete problems such as natural language processing. The Semantic Web with its root in AI is envisioned to be a decentralised world-wide information space for sharing machine-readable data with minimal integration costs. There are many research problems in the Semantic Web that are considered as AI-complete problems. An example is co-reference resolution, which involves determining whether different URIs refer to the same entity. This is considered to be a significant hurdle to overcome in the realisation of large-scale Semantic Web applications. In this paper, we propose a framework for building a DHC system on top of the Linked Data Cloud to solve various computational problems. To demonstrate the concept, we are focusing on handling the co-reference resolution in the Semantic Web when integrating distributed datasets. The traditional way to solve this problem is to design machine-learning algorithms. However, they are often computationally expensive, error-prone and do not scale. We designed a DHC system named iamResearcher, which solves the scientific publication author identity co-reference problem when integrating distributed bibliographic datasets. In our system, we aggregated 6 million bibliographic data from various publication repositories. Users can sign up to the system to audit and align their own publications, thus solving the co-reference problem in a distributed manner. The aggregated results are published to the Linked Data Cloud
Toxic parent portrayed by the mother in C.G. Drews's A Thousand Perfect Notes
No full textENGLISH:
This study aimed to analyze the mother’s highlighting issue of a toxic parent from C.G. Drews’s A Thousand Perfect Notes. The child in this novel was forced to be a pianist by his single mother. There were two objectives in this research; first, to describe the forms of toxic parents portrayed by the mother in C.G Drews’s A Thousand Perfect Notes. Second, to describe the effects of toxic parent on her child in C.G. Drews’s A Thousand Perfect Notes. The researcher analyses the highlighting issue of toxic parent by the mother from C.G. Drews’s A Thousand Perfect Notes using the theory of toxic parent by Dr. Susan Forward, 2002. It uses a psychological approach. The researcher applies the psychology of literary criticism as a literary approach that focuses on the character’s parenting style. The research used the literary work entitled A Thousand Perfect Notes by C.G Drews. Orchard Books published the novel in 2018. The researcher uses words, phrases, sentences, and paragraphs of the story as the analysis data. The findings from the research, the researcher found some of the forms of toxic parents in the novel A Thousand Perfect Notes. The researcher found an issue of a toxic parent experienced by the main character portrayed in the book A Thousand Perfect Notes by C.G Drews. There are some characteristics of toxic parents experienced by the main character. Those are; the insufficient, the controller, the verbal abuser, and the physical abuser. The researcher found that the mother only focuses on her desire. She was a famous pianist, but then she got stroke. She puts her dream into her child, especially Beck. She forces Beck to practice every day for hours and gives some rules to him. She does not care about Beck’s desire. Sometimes, she punishes him if he makes mistake or he disappointed her expectation.
INDONESIA:
Penelitian ini bertujuan untuk menganalisis masalah orang tua yang toxic dari A Thousand Perfect Notes oleh C. G. Anak dalam novel ini dipaksa oleh ibunya untuk menjadi pianis. Penelitian ini memiliki dua tujuan; pertama, untuk mendeskripsikan bentuk-bentuk orang tua yang toxic dalam karakter seorang ibu yang digambarkan dalam A Thousand Perfect Notes karya C.G Drew. Kedua, untuk mendeskripsikan dampak dari orang tua yang toxic pada anak di A Thousand Perfect Notes oleh C.G. Drew. Peneliti menganalisis masalah utama dari orang tua yang toxic dari A Thousand Perfect Notes oleh C.G Drews menggunakan teori orang tua toxic oleh Dr. Susan Forward, 2002. Penelitian ini menggunakan pendekatan psikologi. Peneliti menerapkan kritik sastra pendekatan psikologi yang menitikberatkan pada pola asuh karakter. Peneliti menggunakan karya sastra berjudul A Thousand Perfect Notes oleh C.G Drews. Novel ini diterbitkan oleh Orchard Books pada tahun 2018. Peneliti menggunakan kata- kata, frasa, kalimat, dan paragraph dalam cerita sebagai data analisis. Dari temuan penelitian tersebut, peneliti menemukan beberapa bentuk dari orang tua yang toxic dalam novel A Thousand Perfect Notes. Peneliti menemukan ada masalah orang tua toxic yang dialami oleh karakter utama yang digambarkan dalam novel A Thousand Perfect Notes karya C.G Drew. Ada beberapa ciri orang tua toxic yang dialami oleh tokoh utama, yaitu; tidak mencukupi, terlalu mengontrol, pelaku kekerasan verbal, dan pelaku kekerasan fisik. Peneliti menemukan bahwa karakter ibu hanya fokus pada keinginannya. Dahulu dia adalah seorang pianis terkenal, tetapi kemudian dia terkena struk. Dia menaruh mimpinya pada anaknya, terutama Beck. Dia memaksa Beck untuk berlatih setiap hari selama berjam-jam dan memberikan beberapa aturan kepadanya. Dia tidak peduli dengan keinginan Beck. Terkadang, dia menghukumnya jika dia melakukan kesalahan atau dia mengecewakan harapannya.
ARABIC:
تهدف هذه الدراسة إلى تحليل مشكلة الآباء السيئين من كتاب A Thousand Perfect Notes بقلم C.G Drew والذي يحكي عن الشخصية الرئيسية المسماة Beck Keverich الذي أجبرته أمه الوحيدة على أن يصبح عازف بيانو. هناك هدفان في هذا البحث ؛ أولاً ، لوصف أشكال الأبوة السيئة الموضحة في A Thousand Perfect Notes لـ C.G Drew ، وثانيًا ، لوصف تأثير التربية السيئة على الأطفال في One Thousand Perfect Notes بوا يستخدمد. سوزان فورورد ، 2002. يستخدم المنهج النفسي. يطبق الباحث سيكولوجية النقد الأدبي كمنهج أدبي يركز على تنشئة الشخصية. تستخدم هذه الدراسة نوعين من مصادر البيانات ، وهما الأولية والثانوية. تم جمع مصادر البيانات الأولية من العمل الأدبي المعنون A Thousand Perfect Notes بقلم سي جي درو. نشرت Orchard Books الرواية في عام 2018. واستخدم الباحث الحوار والعمل والسرد كتحليل للبيانات. من نتائج البحث ، وجد الباحثون عدة خصائص للآباء السيئين في رواية ألف ملاحظة كاملة. وجد الباحثون أن هناك مشكلة تربية سيئة تعاني منها الشخصية الرئيسية التي تم تصويرها في رواية ألف ملاحظات مثالية من تأليف سي جي درو. هناك العديد من خصائص الآباء السيئين التي عاشتها الشخصية الرئيسية. هذا هو؛ الذين لا يكفون ، الذين يسيطرون ، مرتكب العنف اللفظي ، ومرتكب العنف الجسدي. وجد الباحثون ، في أحدث نتائج الدراسة ، أن الطريقة التي تعامل بها الأم وتعلم بيك لها العديد من التأثيرات المهمة. وجد الباحثون أن الطفل الذي نشأ مع أبوين فقراتعرض لإيذاء مؤلم. سيستمر الأطفال مع بعض الألم. الإساءة الجسدية للأطفال كافية لإحداث ضرر عاطفي هائل. إن الأعراض التي يعاني منها الأطفال بسبب سيطرة والديهم بشكل مفرط ، ومثقلة بالذنب ، والحماية المفرطة تجعل الأطفال يشعرون بقدر أقل من الثقة وتضر بتقدير الذات مما يؤدي إلى سلوك مدمر للذات. طفل الوالدين السيئين له تأثير ضار لأنه يتعين عليهم إنكار تصوراتهم ومشاعرهم
Intersystem soft handover for converged DVB-H and UMTS networks
No full textDigital video broadcasting for handhelds (DVB-H) is the standard for broadcasting Internet Protocol (IP) data services to mobile portable devices. To provide interactive services for DVB-H, the Universal Mobile Telecommunications System (UMTS) can be used as a terrestrial interaction channel for the unidirectional DVB-H network. The converged DVB-H and UMTS network can be used to address the congestion problems due to the limited multimedia channel accesses of the UMTS network. In the converged network, intersystem soft handover between DVB-H and UMTS is needed for an optimum radio resource allocation, which reduces network operation cost while providing the required quality of service. This paper deals with the intersystem soft handover between DVB-H and UMTS in such a converged network. The converged network structure is presented. A novel soft handover scheme is proposed and evaluated. After considering the network operation cost, the performance tradeoff between the network quality of service and the network operation cost for the intersystem soft handover in the converged network is modeled using a stochastic tree and analyzed using a numerical simulation. The results show that the proposed algorithm is feasible and has the potential to be used for implementation in the real environment
Low-profile directive millimeter-wave antennas using free-formed three-dimensional (3-D) electromagnetic bandgap structures
No full textWe present design methodologies for directive millimeter-wave antennas using free-formed three-dimensional (3-D) electromagnetic bandgap (EBG) structures. Dispersion characteristics of 3-D EBGs have been computed by finite-difference time-domain (FDTD) simulations and the designed EBGs have been fabricated by using the extrusion free-forming technique. The fabricated EBG structures have been measured and integrated with a waveguide feed to form a Fabry-Perot cavity antenna. The prototype antenna demonstrated 10deg to 14deg beamwidths with measured gain of 13 dBi. The woodpile EBG antenna achieved a narrow beamwidth without resorting to complex arrays or bulky reflectors, which would make the antenna well-suited for millimeter-wave broadband mobile communications, imaging and space application
Beyond interfaces: A usability study of Chinese journal databases
No full textA presentation at the Council on East Asian Libraries (CEAL) annual meeting in Boston, MA on March 21, 2007
Analisis Kepribadia Tokoh Utama Katori Masako dalam Novel “OUT” Karya Natsuo Kirino Ditinjau Berdasarkan Psikologi Analitik C.G. Jung
No full textNovel merupakan salah satu bentuk karya sastra yang menceritakan kehidupan seseorang dan orang-orang di sekelilingnya dengan menonjolkan watak dan sifat pelaku atau tokoh. Novel dapat dianalisis menggunakan pendekatan psikologi sastra untuk mengetahui kepribadian tokoh-tokohnya, terutama tokoh utama. Kepribadian merupakan perilaku seseorang yang disadari maupun tidak sadari dan mempunyai ciri unik. Salah satu teori yang dapat digunakan untuk mengetahui kepribadian tokoh utama adalah teori psikologi analitik yang dikemukakan C.G. Jung yang mengemukakan ada empat aspek penting yang membangun kepribadian manusia, meliputi : (1) Persona, (2) Shadow, (3) Anima dan Animus, dan (4) Self. Novel “OUT” dipilih dalam penelitian ini karena sarat akan muatan emosi yang dapat menggambarkan kondisi psikologis tokoh-tokohnya dan memungkinkan untuk dikaji dengan menggunakan teori psikologi analitik C.G. Jung. Penelitian ini bertujuan untuk mendeskripsikan tokoh utama dalam novel “OUT” karya Natsuo Kirino berdasarkan empat aspek kepribadian dalam psikologi analitik C.G. Jung yang meliputi aspek (1) Persona, (2) Shadow, (3) Anima dan Animus, dan (4) Self. Dari analisis yang dilakukan diperoleh kesimpulan bahwa tokoh Katori Masako memiliki (1) Masako dapat memerankan persona yang fleksibel. Hal itu membuatnya dapat bersosialisasi dengan baik pada lingkungannya. Dia adalah tokoh dengan “topeng” yang baik. (2) Masako memiliki shadow/ naluri kebinatangan yang kuat. Hal ini membuatnya tega untuk memutilasi mayat Kenji, seorang laki-laki tua, temannya sendiri Kuniko dan Satake seorang yakuza yang mengincarnya. (3) Berdasarkan anima dan animus Jung, Masako adalah individu androgini, yaitu karakteristik feminin dan maskulinnya kuat. (4) Self pada diri Masako dijelaskan bahwa dia masih berproses untuk mencari jati dirinya
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