A LINEAR APPROACH TO LIE TRIPLE AUTOMORPHISMS OF H*-ALGEBRAS

Martin, A. J. Calderon,Gonzalez, C. Martin Korean Mathematical Society 2011 대한수학회지 Vol.48 No.1

By developing a linear algebra program involving many different structures associated to a three-graded H*-algebra, it is shown that if L is a Lie triple automorphism of an infinite-dimensional topologically simple associative H*-algebra A, then L is either an automorphism, an anti-automorphism, the negative of an automorphism or the negative of an anti-automorphism. If A is finite-dimensional, then there exists an automorphism, an anti-automorphism, the negative of an automorphism or the negative of an anti-automorphism F : A $\rightarrow$ A such that $\delta$:= F - L is a linear map from A onto its center sending commutators to zero. We also describe L in the case of having A zero annihilator.

Wound dressing using graphene quantum dots: a proof of concept

Martins Vanessa Gonzalez Ferreira Caminha,Alencar Luciana Magalhaes Rebelo,Souza Pedro Filho Noronha,Lorentino Carolinne Margot Albanez,Frota Heloisa Freire,dos Santos Andre Luis Souza,Gemini-Piperni 한국약제학회 2023 Journal of Pharmaceutical Investigation Vol.53 No.2

Purpose The costs and complexity related to effective wound healing treatment are immense. The number of multifactorial aspects related to the treatment of wounds (inflammation, infection, and many others) implies a complex multi-therapeutic approach involving various procedures, including medication and surgery. Regarding medication, there are only a few options, especially to treat chronic wounds. Recently graphene quantum dots have been applied for their potent antimicrobial properties as well as their significant tissue remodeling properties. In this study, we developed a formulation based on graphene quantum dots in the form of as a dry powder for wound healing. Methods Graphene quantum dots were produced by top-down technique using graphite as matrix, and fully characterized by Raman spectroscopy, atomic force microscopy, and X-ray diffractometry. The dry powder formulation was produced under aseptic conditions and evaluated in vitro and in vivo. Results The results showed that the formulation improved the healing process in both: in vitro and in vivo, with good adherence, healing time and tissue reconstruction. Finally, the results demonstrated that dry powder was very effective against P. aeruginosa, S. epidermidis, C. albicans and C. tropicalis, representing an improvementfor wound healing purposes. Conclusion The data corroborated the use of the dry powder formulation using graphene quantum dots as matrix as wound dressing, expanding the use of graphene quantum in the biomedical field.

An Array-Based Sensor for Seafood Freshness Assessment

Gonzalez-Martin, Anuncia,Lewis, Brian,Raducanu, Marius,Kim, Jin-Seong Korean Chemical Society 2010 Bulletin of the Korean Chemical Society Vol.31 No.11

This paper describes the development of an automated, hand-held sensor for the fast assessment of seafood freshness. The sensor developed here combined: an array-based chemical sensor, composed of incrementally different conducting polymer elements deposited on a small chip; a highly sensitive, custom-made electronics for the detection of very small signal changes; precise temperature control of the sensor chamber; and an on-board microcontroller for data collection, storage, automation, and analysis. The instrument was used to successfully test seafood samples with different degree of freshness and spoilage. A linear relationship between microbiological count and e-Nose signal for three different fish fillet was developed. Once the linear relationship is included into the hand-held unit software, the e-Nose signal can be used for assessment of seafood freshness without performing the microbiological count technique.

An Array-Based Sensor for Seafood Freshness Assessment

Anuncia Gonzalez-Martin,Brian Lewis,Marius Raducanu,Jinseong Kim 대한화학회 2010 Bulletin of the Korean Chemical Society Vol.31 No.11

This paper describes the development of an automated, hand-held sensor for the fast assessment of seafood freshness. The sensor developed here combined: an array-based chemical sensor, composed of incrementally different conducting polymer elements deposited on a small chip; a highly sensitive, custom-made electronics for the detection of very small signal changes; precise temperature control of the sensor chamber; and an on-board microcontroller for data collection,storage, automation, and analysis. The instrument was used to successfully test seafood samples with different degree of freshness and spoilage. A linear relationship between microbiological count and e-Nose signal for three different fish fillet was developed. Once the linear relationship is included into the hand-held unit software, the e-Nose signal can be used for assessment of seafood freshness without performing the microbiological count technique.

New Framework and Mechanisms of Context-Aware Service Composition in the Future Internet

Alberto J. Gonzalez,Ramon Martin de Pozuelo,Martin German,Jesus Alcober,Francesc Pinyol 한국전자통신연구원 2013 ETRI Journal Vol.35 No.1

The ongoing proliferation of new services, applications, and contents is leading the Internet to an architectural crisis owing to its inability to provide efficient solutions to new requirements. Clean-slate architectures for the future Internet offer a new approach to tackle current and future challenges. This proposal introduces a novel clean-slate architecture in which the TCP/IP protocol stack is decoupled in basic functionalities, that is, atomic services (ASs). A negotiation protocol, which enables context-aware service discovery for providing adapted communications, is also specified. Then, we present how ASs can be discovered and composed according to requesters’ requirements. In addition, a media service provisioning use case shows the benefits of our framework. Finally, a proof-of-concept implementation of the framework is described and analyzed. This paper describes the first clean-slate architecture aligned with the work done within the ISO/IEC Future Network working group.

A LINEAR APPROACH TO LIE TRIPLE AUTOMORPHISMS OF H^*-ALGEBRAS

A. J. Calderon Martin,C. Martin Gonzalez 대한수학회 2011 대한수학회지 Vol.48 No.1

By developing a linear algebra program involving many different structures associated to a three-graded H*-algebra, it is shown that if L is a Lie triple automorphism of an innite-dimensional topologically simple associative H*-algebra A, then L is either an automorphism, an anti-automorphism, the negative of an automorphism or the negative of an anti-automorphism. If A is finite-dimensional, then there exists an automorphism, an anti-automorphism, the negative of an automorphism or the negative of an anti-automorphism F : A → A such that δ := F -L is a linear map from A onto its center sending commutators to zero. We also describe L in the case of having A zero annihilator.

Minimally Invasive versus Open Surgery for Spinal Metastasis: A Systematic Review and Meta-Analysis

Hinojosa-Gonzalez David Eugenio,Roblesgil-Medrano Andres,Villarreal-Espinosa Juan Bernardo,Tellez-Garcia Eduardo,Bueno-Gutierrez Luis Carlos,Rodriguez-Barreda Jose Ramon,Flores-Villalba Eduardo,Martin 대한척추외과학회 2022 Asian Spine Journal Vol.16 No.4

Bones are the third most common location for solid tumor metastasis affecting up to 10% of patients with solid tumors. When the spine is involved, thoracic and lumbar vertebrae are frequently affected. Access to spinal lesions can be through minimally invasive surgery (MIS) or traditional open surgery (OS). This study aims to determine which method provides an advantage. Following the PRISMA (Preferred Inventory for Systematic Reviews and Meta-Analysis) guidelines, a systematic review was conducted to identify studies that compare MIS with OS in patients with spinal metastatic disease. Data were analyzed using Review Manager ver. 5.3 (RevMan; Cochrane, London, UK). Ten studies were included. Operative time was similar among groups at -35.23 minutes (95% confidence interval [CI], -73.36 to 2.91 minutes; <i>p</i>=0.07). Intraoperative bleeding was lower in MIS at -562.59 mL (95% CI, -776.97 to -348.20 mL; <i>p</i><0.00001). OS procedures had higher odds of requiring blood transfusions at 0.26 (95% CI, 0.15 to 0.45; <i>p</i><0.00001). Both approaches instrumented similar numbers of levels at -0.05 levels (95% CI, -0.75 to 0.66 levels; <i>p</i>=0.89). We observed a decreased need for postoperative bed rest at -1.60 days (95% CI, -2.46 to -0.74 days; <i>p</i>=0.0003), a shorter length of stay at -3.08 days (95% CI, -4.50 to -1.66 days; <i>p</i>=0.001), and decreased odds of complications at 0.60 (95% CI, 0.37 to 0.96; <i>p</i>=0.03) in the MIS group. Both approaches revealed similar reintervention rates at 0.65 (95% CI, 0.15 to 2.84; <i>p</i>=0.57), effective rates of reducing metastasis-related pain at -0.74 (95% CI, -2.41 to 0.94; <i>p</i>=0.39), and comparable scores of the Tokuhashi scale at -0.52 (95% CI, -2.08 to 1.05; <i>p</i>=0.41), Frankel scale at 1.00 (95% CI, 0.60 to 1.68; <i>p</i>=1.0), and American Spinal Injury Association Scale at 0.53 (95% CI, 0.21 to 1.37; <i>p</i>=0.19). MIS appears to provide advantages over OS. Larger and prospective studies should fully detail the role of MIS as a treatment for spine metastasis.

A parametric study of optimum tall piers for railway bridge viaducts

Martinez-Martin, Francisco J.,Gonzalez-Vidosa, Fernando,Hospitaler, Antonio,Yepes, Victor Techno-Press 2013 Structural Engineering and Mechanics, An Int'l Jou Vol.45 No.6

This paper presents a parametric study of reinforced concrete bridge tall piers with hollow, rectangular sections. Such piers are typically used in railway construction of prestressed concrete viaducts. Twenty one different piers have been studied with seven column heights of 40, 50, 60, 70, 80, 90 and 100 m and three types of 10-span continuous viaducts, whose main span lengths are 40, 50 and 60 m. The piers studied are intermediate columns placed in the middle of the viaducts. The total number of optimization design variables varies from 139 for piers with column height of 40 m to 307 for piers with column height of 100 m. Further, the results presented are of much value for the preliminary design of the piers of prestressed concrete viaducts of high speed railway lines.

Design of Two-Stage Class AB CMOS Buffers: A Systematic Approach

Antonio Lopez Martin,Jose Maria Algueta Algueta,Lucia Acosta,Jaime Ramirez-Angulo,Ramon Gonzalez Carvajal 한국전자통신연구원 2011 ETRI Journal Vol.33 No.3

A systematic approach for the design of two-stage class AB CMOS unity-gain buffers is proposed. It is based on the inclusion of a class AB operation to class A Miller amplifier topologies in unity-gain negative feedback by a simple technique that does not modify quiescent currents, supply requirements, noise performance, or static power. Three design examples are fabricated in a 0.5 μm CMOS process. Measurement results show slew rate improvement factors of approximately 100 for the class AB buffers versus their class A counterparts for the same quiescent power consumption (< 200 μW).

Series D : The Understanding of Improper Integration - A Case Study

( Camacho Matias ),( Gonzalez Martin Alejandro S. ) 한국수학교육학회 2006 수학교육연구 Vol.10 No.2