Paralytic shellfish toxins in green-lipped mussels,Perna viridis,in Hong Kong     

Mak KC  Li AM  Hsieh DP  Wong PS  Lam MH  Wu RS  Richardson BJ  Lam PK 《Marine pollution bulletin》2003,46(2):258-263

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Mean crustal velocity: a critical parameter for interpreting crustal structure and crustal growth     

Scott B. Smithson  Roy A. Johnson  Yun K. Wong 《Earth and Planetary Science Letters》1981,53(3):323-332

Mean crustal velocity is a critical parameter for genesis of continental crystalline crust because it is a function of mean crustal composition and therefore may be used to resolve continental crustal growth in space and time. Although the best values of mean crustal velocity are determined from wide-angle reflection measurements, most studied here necessarily come from vertical averages in crustal refraction determinations. The mode of 158 values of mean crustal velocity is 6.3 km/s, a velocity which corresponds to a mean crustal composition of granodiorite to felsic quartz diorite; Archean crust may be slightly more mafic. Mean crustal velocities range from 5.8 to 7.0 km/s. The lowest values invariably are found in thermally disturbed rift zones and the highest values correspond to velocities in gabbro. Velocities in island arcs may be as low as 6.0 km/s but are typically 6.5–6.9 km/s which corresponds to andesitic composition; estimates of island arc composition are andesitic. If values of mean crustal velocity are not biased, this observation suggests that continental crust did not grow simply by addition of island arc material. Possibilities are that crust formed from fusion of island arcs and was later changed to more felsic composition by addition of material from the mantle or that the late Archean episode of major crustal growth did not involve processes similar to younger island arcs. Some crustal blocks might be changed in composition and thickness by such processes as underplating, interthrusting, necking and sub-crustal erosion. Specially designed experiments are suggested to determine this parameter so critical for understanding genesis of continental crust.  相似文献   

Effects of bottom sediments on the survival of Enterobacter aerogenes in seawater     

Kwong-Yu Chan  S.H. Wong  C.Y. Mak 《Marine pollution bulletin》1979,10(7):205-210

The survival of the coliform bacterium Enterobacter aerogenes in seawater was greatly affected by the underlying bottom sediments. The presence of sediments which contained higher concentrations of organic nutrients than the overlaying seawater prolonged the survival and even enabled growth of the bacterial cells. Results obtained from chemical analysis indicated that sediments of fine-grained, silt-clay type contained highest amounts of organic nutrients as compared with sediments with larger particle sizes such as silt and sand grains. Thus, nutrient contents of the sediments were found to be inversely proportional to sediment particle size. The degree of prolonged survival of E. aerogenes was also found to be inversely proportional to the size of the sediment particles presented. Release of the bound nutrients which became available to cells of E. aerogenes from sediments by action of waves and human activities can explain, at least in part, why high counts of coliform bacteria are obtained in coastal and beach waters.  相似文献   

Madagascar     

Ming-Hung Wong  Kin-Chung Ho  Tim-Tak Kwok 《Marine pollution bulletin》1980,11(2):36-40

Untreated domestic and industrial wastes are discharged into Tolo Harbour via several major streams entering the harbour. These untreated wastes will cause a harmful effect because Tolo Harbour is a land-locked sea with only a narrow outlet and an ever-decreasing volume caused by the construction of Plover Cove Reservoir and the reclamation of Shatin New Town. In order to study the effect of polluted water discharged into the harbour, water samples and sediments near the mouths of the major rivers were collected. The analysis of the total organic carbon, total nitrogen, and water soluble phosphate contents of the samples showed that Lam Tsuen River, Tai Po Kau River, and Shing Mon River were grossly polluted by organic and inorganic wastes. Blue Snake River which passes through the iron ore tailings accumulated high contents of metal contaminants.  相似文献   

Dynamic response of rigid foundations of arbitrary shape     

H. L. Wong  J. E. Luco 《地震工程与结构动力学》1976,4(6):579-587

An approximate numerical procedure for calculation of the harmonic force-displacement relationships for a rigid foundation of arbitrary shape placed on an elastic half-space is presented. This procedure is used to evaluate the vertical, rocking and horizontal compliance functions for rigid rectangular foundations and the vertical compliance for a rigid square foundation with an internal hole. Several comparisons between the results obtained by the proposed approach and other methods are also presented.  相似文献   

Distribution and source of tar on the Pacific Ocean     

C.S Wong  David R Green  Walter J Cretney 《Marine pollution bulletin》1976,7(6):102-106

Petroleum residues, or tar lumps, are concentrated in the northwestern portion of the Pacific Ocean, particularly in the Kuroshio current system. The source of the tar appears to be tank washings from tankers on the very large Middle East to Japan route. Tar pollutants apparently are discharged by tankers south of Japan, become entrained in the Kuroshio current, and create a plume of contamination which extends downstream for 7000 km across the Pacific.  相似文献   

Numerical weather prediction relevant to the monsoon problem     

T. N. Krishnamurti  John Molinari  Hua-Lu Pan  Vince Wong 《Pure and Applied Geophysics》1977,115(5-6):1357-1372

In this short paper we have identified some of the modelling groups that have the capability of simulating or carrying out short range numerical weather prediction over the monsoon belt. We have next outlined some of the important and desirable ingredients for a multilevel primitive equation model over the tropics, with most of the emphasis on the present version of Florida State University's Tropical Prediction Model. Finally, we present briefly some important results based on the present version of our prediction models that relate to the NWP efforts over the monsoon belt. Here we have identified the importance of mountains, convection, the radiative heating balance of the earth's surface, and the planetary boundary layer over the Arabian Sea.  相似文献   

Contact stresses and ground motion generated by soil-structure interaction     

H. L. Wong  J. E. Luco  M. D. Trifunac 《地震工程与结构动力学》1977,5(1):67-79

A study has been made of the dynamic contact stresses that the foundation of a nine-storey reinforced concrete building exerts on the soil during forced vibration tests. The effects of the flexibility of the foundation on the contact stress distribution and on the force-displacement relationship for the foundation have been examined in an attempt at testing several simplifying assumptions commonly used in soil-structure interaction studies. Comparisons of calculated and observed ground displacements induced by soil-structure interaction in the immediate neighbourhood of the building have also been presented.  相似文献   

USERS′ PERCEPTION OF KOWLOON PARK, HONG KONG： VISITING PATTERNS AND SCENIC ASPECTS   总被引：1，自引：0，他引：1  

Wong Koon-kwai  Manfred Domroes 《中国地理科学(英文版)》2004,14(3):269-275

Hong Kong is a hyper-dense city with 7×10⁶ people living in an area of 1100km². One way to improve the livability of compacted and congested cities like Hong Kong is through the provision of urban parks, an aspect that has largely been under-researched. This study focuses on how users perceive and utilize various facilities in the Kowloon Park. The findings revealed that the Kowloon Park is one of the most preferred parks in Hong Kong for both local residents and tourists. Users were quite satisfied with the park’s facilities. Notably, the most important component of an urban park is its greenery. This is followed by water elements, seating places, and facilities for various recreational activities. The improvements users would like to see in urban parks include good design and management, meeting users’ needs, overcoming barriers to use, and providing a high quality and varied experience for different groups in the community. The findings of this study provide a good basis to address park management issues from the users’ perspective. In particular, parks should provide easy access, encourage optimum usage and enable complimentary improvements to the environment. Foundation item: Under the auspices of the Germany-Hong Kong Joint Research Scheme (No.GER/99-00/01) and the Faculty Research Grant of the Hong Kong Baptist University (No.FRG/00-01/I-38) Biography: WONG Koon-kwai (1950—), male, a native of Guangdong Province, Ph.D., associate professor, specialized in the analysis of human-environment interaction. E-mail: kenwong@hkbu.edu.hk  相似文献   

Cosmological and astrophysical neutrino mass measurements     

K.N. AbazajianE. Calabrese  A. CoorayF. De Bernardis  S. Dodelson  A. FriedlandG.M. Fuller  S. HannestadB.G. Keating  E.V. Linder  C. LunardiniA. Melchiorri  R. Miquel  E. PierpaoliJ. Pritchard  P. SerraM. Takada  Y.Y.Y. Wong 《Astroparticle Physics》2011,35(4):177-184

Cosmological and astrophysical measurements provide powerful constraints on neutrino masses complementary to those from accelerators and reactors. Here we provide a guide to these different probes, for each explaining its physical basis, underlying assumptions, current and future reach.  相似文献