Communication Subsystems for Satellite Design

Nguyen, Hung; Nguyen, Peter S.

doi:10.5772/intechopen.93010

Cited by 5 publications

(6 citation statements)

References 12 publications

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“…Addendum. After the first pre-print of this work appeared, Haïm Brezis shared with us an unpublished work by Nguyen [13], which contains an alternative approach to the lower bound of the Γ-limit. Nguyen's argument is based on a simple convolution estimate of the form…”

Section: Discussionmentioning

confidence: 99%

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Representation of the total variation as a $Γ$-limit of $BMO$-type seminorms

Arroyo-Rabasa¹,

Bonicatto²,

Nin³

2021

Preprint

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We address a question raised by Ambrosio, Bourgain, Brezis, and Figalli, proving that the Γ-limit, with respect to the L 1 loc topology, of a family of BM O-type seminorms is given by 1 4 times the total variation seminorm. Our method also yields an alternative proof of previously known lower bounds for the pointwise limit and conveys a compactness result in L 1 loc in terms of the boundedness of the BM O-type seminorms.

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Section: Discussionmentioning

confidence: 99%

“…induced by the lattice δZ. For any w ∈ L 1 loc (R), we may define a δ-scale piecewise approximation by setting (13) w δ :=…”

Section: The Lower Bound In Dimension Onementioning

confidence: 99%

Representation of the total variation as a $Γ$-limit of $BMO$-type seminorms

Arroyo-Rabasa¹,

Bonicatto²,

Nin³

2021

Preprint

View full text Add to dashboard Cite

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“…My Lien (in Kim Lien, Dong Da, Ha Noi) was first mistreated by her stepmother, also her guardian after her father's death. All property inherited was dissipated by the stepmother, leaving nothing for her future 3 . Hiếu (in Láng Hạ, Hà Nội) used to be a happy child under the care of the family.…”

Section: The Current Situation In Vietnammentioning

confidence: 99%

Personal property management in trust: Implications for Vietnam

2022

Sci. Tech.Dev. J. - Eco. Law Manag.

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With the prosperity of the nation, Vietnamese residents are the beneficiaries of more satisfactory legal frameworks regulating relatively all possible social issues. However, the legal component of personal asset management is considered to be refined. In reality, the existence of disputes and litigations over property management in fields of inheritance has placed pressure on legislators and law practitioners. Citizens who are not able to manage property effectively due to the lack of time, incapacity, knowledge deficiency are requesting an effective legal tool for a secure separation between a beneficial interest and a management right over the same property. At the same time, there exists cases where personal desires in the disposition of property upon death, the management of property, inheritance of family property should be respected accordingly. The demand for an effective personal or family asset management tool in Vietnamese current legal framework has become more urgent than ever, rooting in a fact that existing legislation has not satisfied an emerging need in the daily lives of inhabitants even though global cases have proven trusts as a very efficient method to handle all relevant practical matters. This paper focuses on researching the possibilities of adopting trusts in Vietnam to settle family property management through an analysis of practical demands, major characteristics of trusts, and potential obstacles. Results have shown a high potential of introducing trusts into Vietnam as a result of the fact that the Viet Nam Civil Code 2015 implies an appropriate background for such an introduction. The introduction and adoption of trusts into the Vietnamese legal system will possibly offer enormous benefits to the country's civilians.

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“…A satellite is composed of several parts, which vary depending on the type of application and orbit. Two elements, however, are common to all satellites and are called payload and platform [6]. The platform is the part of the satellite that carries the payload and all its equipment in space.…”

Section: Introductionmentioning

confidence: 99%

Additive Manufacturing for Lightweighting Satellite Platform

et al. 2023

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Lightweight structures with an internal lattice infill and a closed shell have received a lot of attention in the last 20 years for satellites, due to their improved stiffness, buckling strength, multifunctional design, and energy absorption. The geometrical freedom typical of Additive Manufacturing allows lighter, stiffer, and more effective structures to be designed for aerospace applications. The Laser Powder Bed Fusion technology, in particular, enables the fabrication of metal parts with complex geometries, altering the way the mechanical components are designed and manufactured. This study proposed a method to re-design the original satellite structures consisting of walls and ribs with an enclosed lattice design. The proposed new structures must comply with restricted requirements in terms of mechanical properties, dimensional accuracy, and weight. The most challenging is the first frequency request which the original satellite design, based on traditional fabrication, does not satisfy. To overcome this problem a particular framework was developed for locally thickening the critical zones of the lattice. The use of the new design permitted complying with the dynamic behavior and to obtain a weight saving maintaining the mechanical properties. The Additive Manufacturing fabrication of this primary structure demonstrated the feasibility of this new technology to satisfy challenging requests in the aerospace field.

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Communication Subsystems for Satellite Design

Cited by 5 publications

References 12 publications

Representation of the total variation as a $Γ$-limit of $BMO$-type seminorms

Representation of the total variation as a $Γ$-limit of $BMO$-type seminorms

Personal property management in trust: Implications for Vietnam

Additive Manufacturing for Lightweighting Satellite Platform

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