Fast Imaging Solar Spectrograph of the 1.6 Meter New Solar Telescope at Big Bear Solar Observatory     

Jongchul Chae  Hyung-Min Park  Kwangsu Ahn  Heesu Yang  Young-Deuk Park  Jakyoung Nah  Bi Ho Jang  Kyung-Suk Cho  Wenda Cao  Philip R. Goode 《Solar physics》2013,288(1):1-22

For high resolution spectral observations of the Sun – particularly its chromosphere, we have developed a dual-band echelle spectrograph named Fast Imaging Solar Spectrograph (FISS), and installed it in a vertical optical table in the Coudé Lab of the 1.6 meter New Solar Telescope at Big Bear Solar Observatory. This instrument can cover any part of the visible and near-infrared spectrum, but it usually records the Hα band and the Ca ii 8542 Å band simultaneously using two CCD cameras, producing data well suited for the study of the structure and dynamics of the chromosphere and filaments/prominences. The instrument does imaging of high quality using a fast scan of the slit across the field of view with the aid of adaptive optics. We describe its design, specifics, and performance as well as data processing  相似文献   

Temperature of Solar Prominences Obtained with the Fast Imaging Solar Spectrograph on the 1.6 m New Solar Telescope at the Big Bear Solar Observatory     

Hyungmin Park  Jongchul Chae  Donguk Song  Ram Ajor Maurya  Heesu Yang  Young-Deuk Park  Bi-Ho Jang  Jakyoung Nah  Kyung-Suk Cho  Yeon-Han Kim  Kwangsu Ahn  Wenda Cao  Philip R. Goode 《Solar physics》2013,288(1):105-116

We observed solar prominences with the Fast Imaging Solar Spectrograph (FISS) at the Big Bear Solar Observatory on 30 June 2010 and 15 August 2011. To determine the temperature of the prominence material, we applied a nonlinear least-squares fitting of the radiative transfer model. From the Doppler broadening of the Hα and Ca ii lines, we determined the temperature and nonthermal velocity separately. The ranges of temperature and nonthermal velocity were 4000?–?20?000 K and 4?–?11 km?s^?1. We also found that the temperature varied much from point to point within one prominence.  相似文献   

Mixture Gumbel models for extreme series including infrequent phenomena     

Thomas Rodding Kjeldsen  Hyunjun Ahn  Ilaria Prosdocimi  Jun-Haeng Heo 《水文科学杂志》2013,58(13-14):1927-1940

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H2S Emissions from a Submerged Pilot‐Scale Fixed Bed Biofilm Reactor     

Ana Lorena Esteban‐García  Raquel Lebrero  Manuel Alejandro de los Santos  Raúl Muñoz  Juan Ignacio Tejero 《洁净——土壤、空气、水》2013,41(5):469-472

A study was performed in two submerged, pilot‐scale biofilm bioreactors operated under different conditions to determine the relationship between the operating parameters and H₂S emission. H₂S was always detected in the exhaust air at concentrations varying from 1 to 353 ppm_v. The specific aeration rate was the most influencing parameter, with As < 30 kg COD (dissolved oxygen concentrations <4 mg L^?1) increasing noticeably the H₂S production. The periodical removal of the accumulated sludge reduced H₂S emissions by ～14%.  相似文献   

Mortality and Physiological Responses with Regard to the Surf Clam,Mactra quadrangularis,Exposed to Chlorine     

Lee  Seon-Sik  Ahn  Hyung-Jin  Hwang  In-Uk  Kim  Eun  Han  Kyung-Nam 《Ocean Science Journal》2021,56(4):406-412

Ocean Science Journal - Carcinogenic disinfection by-products (DBPs) are formed as the result of the chlorination of power plant water cooling systems for biofouling purposes. Effects of cooling...  相似文献   

The use of remotely sensed data and ground survey tools to assess damage and monitor early recovery following the 12.5.2008 Wenchuan earthquake in China   总被引：1，自引：0，他引：1  

Daniel Brown  Keiko Saito  Meng Liu  Robin Spence  Emily So  Michael Ramage 《Bulletin of Earthquake Engineering》2012,10(3):741-764

The M7.9 Wenchuan earthquake on May 12th, 2008 was the most destructive in China since 1976. The event caused huge damage and loss of life and exposed weaknesses both in the formulation and implementation of the regulations governing building in the affected provinces. Following the earthquake a massive relief and recovery operation was mounted by the Chinese government. The authors took part in field studies in the affected area which took place 5 and 11?months after the event, at which time recovery operations were well-advanced. The aims of the study were to assess the effects caused by the earthquake to the built environment and society, to collect information on the ongoing recovery efforts and future plans, and to demonstrate the use of tools that allow the collection of spatially referenced damage and recovery data. Based on available satellite imagery supplemented by ground observation, geodatabases were constructed containing information on damage and recovery in several parts of the affected area. The paper gives an overview of the recovery process, describes the methods used to construct these geodatabases, and offers some analysis of the data obtained. It is argued that such databases have great potential for the management of post-disaster recovery and for creating a permanent record of the recovery process.  相似文献   

Preface to the special issue “Imaging Earthquakes”     

Shamita Das  Raúl Madariaga 《Journal of Seismology》2016,20(4):1057-1057

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2007 August 15 magnitude 7.9 earthquake near the coast of Central Peru: analysis and field mission report     

Fabio Taucer  John E. Alarcon  Emily So 《Bulletin of Earthquake Engineering》2009,7(1):1-70

A field reconnaissance mission was led to the areas affected by the disaster caused by the Magnitude 7.9 earthquake event of 15/08/2007 near the city of Pisco in Peru. The main objectives of the mission were to collect data and make observations leading to improvements in design methods and techniques for strengthening and retrofit, and to assist the phase of reconstruction. The mission focused on the behaviour of non-engineered structures, in particular those of adobe constructions. The findings of the mission confirmed that most of the damage was observed on adobe houses constructed with traditional non anti-seismic techniques which either collapsed or nearly collapsed, causing 519 deaths, 1,366 injuries and more than 58,000 houses destroyed. The mission also confirmed that buildings constructed according to modern earthquake resistant design standards performed with no evident damage. All the parties contacted during the mission, especially the EC Delegation, showed particular interest in the results of the present mission report, which will be taken into consideration when planning the reconstruction phase, especially of the most distant rural areas, where close collaboration between the Governmental Institutions, International Organizations, Universities and NGO’s, will be needed to assist the population for the adoption of earthquake resistant designs in the reconstruction of the destroyed houses.  相似文献   

Antibiotics in the Hong Kong metropolitan area: Ubiquitous distribution and fate in Victoria Harbour   总被引：7，自引：0，他引：7  

Tu Binh Minh  I. Ha Loi  Man Ka So  David Choi  Gene Zheng  Joseph H.W. Lee  Bruce J. Richardson 《Marine pollution bulletin》2009,58(7):1052-5312

We investigated the presence and fate of 16 antibiotics belonging to seven groups (β-lactams, fluoroquinolones, macrolides, sulfonamides, tetracyclines, trimethoprim and amphenicols) in effluents of sewage plants and receiving waters in Hong Kong. Cefalexin, amoxicillin, ofloxacin and erythromycin-H₂O were ubiquitous in sea water throughout Victoria Harbour, indicating continuous discharge to the environment. This is one of the few studies reporting the frequent occurrence of cefalexin and amoxicillin in sewage effluents and sea water (170-5070 and 64-1670 ng/L in sewage; 6.1-493 and 0.64-76 ng/L in sea water, respectively). Mass flows from seven sewage plants discharged an estimated total of 14.4 kg/day to the Harbour. Typhoon shelters also appeared to play an important role as sources of antibiotics, as evidenced by elevated concentrations within their boundaries. Mass balance estimations suggested significant quantities of antibiotics are discharged to the Harbour without passage through treatment plants.  相似文献   

Probabilistic relationships between wind and surface water circulation patterns in the SE Bay of Biscay     

Lohitzune Solabarrieta  Anna Rubio  Mar Cárdenas  Sonia Castanedo  Ganix Esnaola  Fernando J. Méndez  Raúl Medina  Luis Ferrer 《Ocean Dynamics》2015,65(9-10):1289-1303

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