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Alexander Sigman(알렉산더 시어도어 시그만),Matthias Megyeri(니콜라 미즈다리스),Nicolas Misdariis(마티아스 메지에리) 한국전자음악협회 2013 에밀레 Vol.11 No.-
본 연구의 주된 목표는 수동적이며 뻔한 소리로 인하여 종종 무시되는 공공의 골칫거리, 자동차 경고음을 상호작용이 가능하며 차량 환경과 결부된 시청각 악기로 변화시키는 것이다. 2013년 1월에서 8월까지 진행된 프로젝트의 첫 단계에서는 현존하는 경고음들을 모으고 분류하여 자가학습이 가능한 상호작용을 구축하였다. 2013년 9월에서 2014년 2월 사이 수행된 2단계에서는 분류된 소리들을 소리 인지실험 및 차량 경고 시스템의 원형들을 이용해 특징별로 정밀하게 재분류하였다. 추후 최종 결과물로서의 경고음 원형들이 갤러리를 비롯한 설치 장소에 전시될 예정이다. 소리 예술, 인지 연구, 제품 디자인, 산업 디자인의 영역을 아우르는 본 프로젝트가 의미 있는 예술적 인터페이스 디자인 구축 사례로서 성공적인 결과물을 얻을 것으로 기대된다. alarm/will/sound is a research-based interdisciplinary project, currently being developed by Korea-based composer and sound artist Alexander Sigman and Stuttgar-based product designer/visual artist Matthias Megyeri?in collaboration with the IRCAM Sound Perception and Design (SPD) research team. The primary objective of this project in progress is to transform the car alarm from a passive, oft-ignored public nuisance with a predictable repertoire of sounds into a dynamic and intelligent interactive audio-visual instrument that engages with the car’s environment. The first phase of the project (January-August 2013) consisted of conducting research into existing auditory warning systems, building, organizing, and indexing sound libraries and designing machine-learning-driven interaction systems. During the second phase (September 2013-February 2014), the sound library categories are being characterized, evaluated, and refined through sound perception experiments, the interaction systems implemented and trained, and the hardware for a series of car alarm prototypes constructed. Uniting the fields of sound art, perception research, product design, and industrial design, it is hoped that the outcomes of this project will have meaningful artistic, research, and interface design applications.
OECD countries’ Vision for the future
Richard Sigman 한국농약과학회 2007 한국농약과학회 학술발표대회 논문집 Vol.- No.-
OECD countries invest significant resources in evaluating agricultural pesticides before they are marketed (or re-evaluating pesticides that have been in use for many years) to ensure that they do not pose unacceptable risks to human health and the environment. Since many pesticides used in OECD countries are the same, governments have recognised the substantial benefits that can be gained if the task of pesticide evaluations for registration and re-registration is shared, rather than duplicating each others' work. The OECD Pesticides Programme is working to establish the infrastructure that will facilitate such work sharing. The recent adoption of an OECD-wide future “vision,” with specific deadlines for work sharing, should lead to additional (and more routine) work sharing arrangements between governments and industry. The first submission by a company for a joint review, using the worksharing techniques, will be made in the first quarter of 2007.
남극해 드레이크해협 해수의 질산염 농도와 질소동위원소 값의 변화
장양희,김부근,신형철,Daniel M. Sigman,Yi Wang,홍창수 한국해양과학기술원 2008 Ocean and Polar Research Vol.30 No.4
Seawater samples were collected at discrete depths from five stations across the polar front in the Drake Passage (Antarctic Ocean) by the 20th Korea Antarctic Research Program in December, 2006. Nitrate concentrations of seawater increase with depth within the photic zone above the depth of Upper Circumpolar Deep Water (UCDW). In contrast, δ 15N values of seawater nitrate decrease with depth, showing a mirror image to the nitrate variation. Such a distinct vertical variation is mainly attributed to the degree of nitrate assimilation by phytoplankton as well as organic matter degradation of sinking particles within the surface layer. The preferential 14NO3- assimilation by the phytoplankton causes 15NO3− concentration to become high in a closedsystem surface-water environment during the primary production, whereas more 14NO3− is added to the seawater during the degradation of sinking organic particles. The water-mass mixing seems to play an important role in the alteration of δ 15N values in the deep layer below the UCDW. Across the polar front, nitrate concentrations of surface seawater decrease and corresponding δ 15N values increase northward, which is likely due to the degree of nitrate utilization during the primary production. Based on the Rayleigh model, the calculated ε (isotope effect of nitrate uptake) values between 4.0‰ and 5.8‰ were validated by the previously reported data, although the preformed δ 15NO3− initial value of UCDW is important in the calculation of ε values. Seawater samples were collected at discrete depths from five stations across the polar front in the Drake Passage (Antarctic Ocean) by the 20th Korea Antarctic Research Program in December, 2006. Nitrate concentrations of seawater increase with depth within the photic zone above the depth of Upper Circumpolar Deep Water (UCDW). In contrast, δ 15N values of seawater nitrate decrease with depth, showing a mirror image to the nitrate variation. Such a distinct vertical variation is mainly attributed to the degree of nitrate assimilation by phytoplankton as well as organic matter degradation of sinking particles within the surface layer. The preferential 14NO3- assimilation by the phytoplankton causes 15NO3− concentration to become high in a closedsystem surface-water environment during the primary production, whereas more 14NO3− is added to the seawater during the degradation of sinking organic particles. The water-mass mixing seems to play an important role in the alteration of δ 15N values in the deep layer below the UCDW. Across the polar front, nitrate concentrations of surface seawater decrease and corresponding δ 15N values increase northward, which is likely due to the degree of nitrate utilization during the primary production. Based on the Rayleigh model, the calculated ε (isotope effect of nitrate uptake) values between 4.0‰ and 5.8‰ were validated by the previously reported data, although the preformed δ 15NO3− initial value of UCDW is important in the calculation of ε values.
Park, Yoonsu,Niemeyer, Zachary L.,Yu, Jin-Quan,Sigman, Matthew S. American Chemical Society 2018 Organometallics Vol.37 No.2
<P>Delineating complex ligand effects on enantioselectivity is a longstanding challenge in asymmetric catalysis. With α-amino acid ligands, the essential difficulty lies in accurately describing integrated perturbations induced by simultaneous variation about the α side chain and N protecting group of the ligand, which hampers an intuitive understanding of the structure-enantioselectivity relationships. To deconvolute such complexity in chiral amino acid enabled enantioselective C-H functionalization reactions, a computational organometallic model system was developed. Whereas a model based only on a conventional results in diminished predictive power, the ground state Pd(II)-based models display an excellent ability to describe the observed enantioselectivity. These structures were leveraged using a multivariate modeling approach to successfully describe Pd(II)-catalyzed C-H alkylation, alkenylation, and two C-H arylation reactions, wherein descriptors of torsion angle, percent buried volume, and NBO charge showed quantitative relevance to predict enantiomeric excess. On the basis of the insights revealed in these case studies, an optimal set of amino acid ligands is suggested to provide maximum information in a screening campaign.</P> [FIG OMISSION]</BR>