Full-text resources of PSJD and other databases are now available in the new Library of Science.
Visit https://bibliotekanauki.pl
Preferences help
Polish version English version Language
enabled [disable] Abstract
Number of results

Results found: 2

Number of results on page
first rewind previous Page / 1 next fast forward last

Search results

Search:
in the keywords:  trap
help Sort By:

help Limit search:
first rewind previous Page / 1 next fast forward last
1
Publication available in full text mode
Content available

Construction of Traps (Krendet) as traditional fishing gear of Lobster (Panulirus sp.) in Pangandaran Regency, Indonesia

100%
Rina R., Dewanti L. P., Ismail M. R., Apriliani I. M.
World News of Natural Sciences
|
2022
|
vol. 41
85-97
EN
The fishing gear used by the majority of fishermen on Madasari Beach, Pangandaran Regency, Indonesia is the krendet as known as fishing traps. Krendet is a passive fishing gear and is classified as trap net a selective because the lobster caught is legal size of lobster, which is above 200 grams. Krendet has a construction of a frame, net, bait line, towing line and ballast. One of the commodities is lobster (Panulirus sp.). Lobster catching permits have been regulated in the Minister of Maritime Affairs and Fisheries Regulation No. 17 of 2021, its stated regarding permitted lobster catching with carapace lengths above 6 cm or weight above 150 grams per head for sand lobster (Panulirus homarus). This study aims to determine the construction of the fishing gear krendet used by the fishermen of Madasari Beach, Pangandaran Regency. Based on observations that the webbing is made of PA monofilament with 3.5 inches mesh size. The Frame is made of iron in the form of a circle with a diameter of ±60 cm. The ballast used was made of stone with a weight of ±1.5 kg. The traps (krendet) also consist towing rope and a float rope. The tow rope is made of monofilament with a size of 3-4 mm diameters and a length of 15-30 m, while the float rope is made of polyethylene (PE) with a size of 1.5 mm and a length of about ±60 cm.
2
Content available remote

Oscillator rule of the trap activation energies in NaCl crystals

100%
Gumenjuk A., Kutovyi S.
Open Physics
|
2003
|
vol. 1
|
issue 2
307-331
EN
The energy spectra of traps in NaCl crystals have been studied in detail by the method of thermoluminescence. Crystals of NaCl were undoped but treated thermally in different ways. The activation energies of traps form a single oscillator series, E n=ℏωTL(n+1/2), ℏωTL=903 cm-1. Contrary to other previously studied crystals with complex lattices, the corresponding line ℏωRam=ℏωTL was not found in Raman spectra of NaCl. It is assumed that the oscillator rule is governed by the polaron nature of traps. The trap activation energy is determined by the vibration level from which the transition of the charge carrier to the excited luminescence centre is made possible and depends on the distance between these centres.
first rewind previous Page / 1 next fast forward last
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.