• 한국초전도학회:학술대회논문집
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• v.13
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• pp.52-52
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• 2003

• Progress in Superconductivity
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• v.2 no.1
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• pp.47-50
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• 2000

We have constructed a multi-channel SQUID magnetometer system. The system is designed to operate normally with 10 high temperature direct coupled SQUIDs. The main features of the system include a remote control by serial communication, low noise with wide bandwidth and high slew rate by several MHz modulation, signal conditioning and calibration by digital signal processing.

• Solar Energy
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• v.7 no.1
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• pp.14-22
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• 1987

This paper presents an experimental study of a solar drying system designed and installed by KIER. Experiments have been performed using the KIER system for the drying of marine products, such as squid. Presented in detail are the experimental observations of collector air temperature, solar intensity, absorber plate temperature, drying chamber temperature, humidity and other measures of drying chamber performance with variation of air mass flow rate. As a result, average temperature attained in the drying chamber during autumn weather has been adequated for drying of squids.

• Journal of Food Hygiene and Safety
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• v.14 no.4
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• pp.380-385
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• 1999

This study was performed to investigate the contents of sulfites in 2, 770 dried marine products in Seoul Chung-Bu market from March to October in 1999. Sulfites of the samples were determined by Zn powder reduction method and Monnier-Williams's modified method. Eight samples of 2, 770 (0.29%) were detected over 30ppm in SO2 contents by Monnier-Williams's modified method. In samples detected over 30ppm, six dried filefishes(130.2~573.4ppm) were imported from Vietnam, same kind of other one(114.2ppm) was from China and the other one Alaska pollack(196.3ppm) was domestic. By Zn powder reduction method, 259 dried marine products (259/2, 770=9.35%) were positive reaction (1-30ppm). These were 93 dried shrimps, 53 filefish meats, 34 dried squids, 33 slices of dried pollacks and 17 sea mussel meats. So sulfites must be use commonly to prevent black spot and preserve for many dried shrimps, filefishes meats, dried squids etc. According to results, the quality test for the imported dried marine products must be reinforced to supply safety food for the citizens.

• Journal of Fisheries and Marine Sciences Education
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• v.9 no.2
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• pp.236-245
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• 1997

On the basis of the seven species of fish caught by fishing boats with two crewmen belonging to the Iwawada Fisheries Cooperative of Chiba Prefecture, the fishing boats were classified by species withhigh market values, and the results obtainedwere reclassified by discriminant function. As a result, the fishing boats were classified into four groups. These four groups are : G1 featuring themain catchesof yellowtailsand skipjack/tunas ; G2 yellowtails and squids ; G3 squids and skipjack/tunas, and G4 octopus and other miscellaneous specles. Furthermore, principal component analysis were carried out on fish catches of the seven species in terms of the value obtained from a catch from the scores of the first, second and third principal components. The results of analysis show that Groups G1, G2 and G3 assume identical fishing form, while only Group G4 asumes a different fishing form.

• Progress in Superconductivity
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• v.13 no.1
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• pp.1-6
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• 2011

Measurement of magnetic signals generated from electric activity of myocardium provides useful information for the functional diagnosis of heart diseases. Key technical component of the magnetocardiography (MCG) technology is SQUID. To measure MCG signals with high signal-to-noise ratio, sensitive SQUID magnetic field sensors are needed. Present magnetic field sensors based on Nb SQUIDs have field sensitivity good enough to measure most of MCG signals. However, for accurate measurement of fine signal pattern or detection of local atrial fibrillation signals, we may need higher field sensitivity. In addition to field sensitivity, economic aspect of the SQUID system is also important. To simplify the SQUID readout electronics, the output voltage or flux-to-voltage transfer of SQUID should be large enough so that direct measurement of SQUID output can be done using room-temperature preamplifiers. Double relaxation oscillation SQUID (DROS), having about 10 times larger flux-to-voltage transfers than those of DC-SQUIDs, was shown to be a good choice to make the electronics compact. For effective cancellation of external noise inside a thin economic shielded room, first-order axial gradiometer with high balance, simple structure and long-baseline is needed. We developed a technology to make the axial gradiometer compact using direct bonding of superconductive wires between pickup coil and input coil. Conventional insert has mechanical support to hold the gradiometer array, and the dewar neck has equal diameter with the dewar bottom. Boiling of the liquid He can generate mechanical vibrations in the gradiometer array due to mechanical connection structure. Elimination of the mechanical support, and direct mounting of the gradiometer array into the dewar bottom can reduce the dewar neck diameter, resulting in the reduction of liquid He consumption.

• Parasites, Hosts and Diseases
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• v.35 no.1
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• pp.19-24
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• 1997

The infection status of anisakid larvae was examined in 290 marine fish of 25 species and in 108 cephalopods of 3 species purchased in Bayuquan region, Yingko city nearby the coast of the Bohai Sea from may to August 1992. A total of 7,327 laivae were collected from 156 fish of 19 species and 8 squids of one species. The 3rd-stage larvae of Anisokis simplex were collected from 121 fish (63..4%) of 15 species (N : 191) and from 8 squids (14.8%) of one species (N : %4), and they were total, 5,992 (81.8%). Out of remaining 1,335 larvae, 154 (2.1%) were classified as Rvnnqscnris type B from 23 fish of 4 species, 1,013 (13.8%) as avnnosccris type C from 79 fish of 13 species, 164 (2.2%) as Hvsterothylacium China type V from 20 fish of 4 species, 3 (0.04%) as Raphinoscnris from 3 fish of 2 species and one was Pseunotewonovc necipiens larva. Key words: Bohai Sea, Anisokinae, larvae , Anisckis, HvsterothWLacium, Thwnnascaris, Raphinqscaris , Pseudoterranova.

• The Korean Journal of Zoology
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• v.9 no.2
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• pp.12-20
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• 1966

Studies on the rate of growth, the rate of feeding and the efficiency of food conversion on the stage of new-born fries to the near adult size for three species of cuttlefishes , Sepia esculenta, Sepia subaculeata, Sepiella maindroni and two species of squids, Sepioteuthis lessomiana, Euprymna berryi were carried out in the process of artificial raising, and then argued about a feasibility of the propagation of cuttlefishes and squids. 1. The relation between the daily age (D) and the body weight(W) of Sepia exculent is expressed in a logarithmic equation, log W=3.0649 log D-4.2768. The daily rates of growth through 121 days of the raising period were 1.46 per cent for the man시 length and 1.67 percent for the body weight. The raipidest growth of Sepia esculenta is observed at the stage of 1 to 4 cm in the mantle length . At that time the daily rates of growth reach 3.3 to 5.5 percent for the mantle length and 10.4 to 12.0 percent for the body weight, respectively. The growth of Sepia esculenta varies a great deal to the bait. When fed on a dead bait the rates of growth decrease 17 per cent for the mantle length and 26 percent for the body weight compared with those fed on a live bait. 2. The relation between the daily age and the body weight of Sepia subaculeata is expressed in a logarithmic equation, log W=3.7447 log D-4.9003. The daily rates of growth through 110 days of the raising period were 1.63 percent for the mantle length and 1.83 percent for the body weight. The rapidest growth of Selia subaculeata is observed at the stage of 1.5 to 9.0 cm in the mantle length. At that time the daily rates of growth reach 3.1 to 7.4 percent for the mantle length and 6.8 to 16.7 percent for the body weight , respectively. 3. The relation between tehdaily age and the body weight of Sepiella maindroni is expressed in a ogarithmic equation , log W=2.9332 log D-3.8224 . The daily rates of growth through 133 days of the rearing period were 1.39 percent for the mantle length and 1.51 percent for the body weight . The rapidest growth of Sepiella maindroni is observed at the stage of 0.4 to 5.8 cm in the mantle length. At that time the daily rates for growth reach 4.6 to 7.3 percent for the mantle length and 8.5 to 15.4 percent for the body weight , respectively. 4. The daily rates of growth onthe stage of 0.5 to 6.0 comin the mantle length of Sepioteuthis lessoniana were 4.1 to 5.9 percent for the mantle length and 7.1 to 10.7 percent for the body weight . 5. During the rearing period of 31 days immediately after the hatching , the daily rateof feeding of Sepia esculenta marked 11.0 to 39.4 percent (28.2 percent in an average), and the efficiency of food conversion of this species reached 9.0 to 71.0percent (38.7percent in an average). Even at the more growing stage of 4.5to 6.2 cm in the mantle length, the daily rate of feeding of three species of cuttlefishes wee maintained 17.7 percent for Sepia esculenta, 30.8 percent for Sepia subaculeata and 34.7percent for Sepiella maindroni on an average. 6. The efficiency of food coversion of cuttlefishes and squids are larger than those of other fishes, and all the species are rapid in their growth. Four to five months are thought to be enough for their growing into a fair commercial size.

• Fisheries and Aquatic Sciences
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• v.9 no.3
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• pp.129-133
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• 2006

We examined the distribution and biology of cephalopods collected during joint Korean-Russian surveys of the East/Japan Sea in 1993 and 1994. A total of six species of cephalopods belonging to five families were collected during the surveys: one sepiid squid, four teuthid squids, and one octopus.

• Proceedings of the Korean Magnestics Society Conference
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• 2012.11a
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• pp.79-79
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• 2012