scholarly journals ANALISIS DEGRADASI DAN DEPRESIASI SUMBERDAYA IKAN BAWIS (Siganus canaliculatus) DI PERAIRAN KOTA BONTANG

2019 ◽  
Vol 15 (2) ◽  
pp. 249
Author(s):  
Nurul Ovia Oktawati ◽  
Qoriah Saleha ◽  
Oon Darmasyah
Keyword(s):  
Time Series ◽  
Endemic Species ◽  
Degradation Rate ◽  
Marine Water ◽  
Depreciation Rate ◽  
Interview Method ◽  
Siganus Canaliculatus ◽  
Standard Coefficient

Bawis fish that is an endemic species and living in the seagrass biota has been found many in marine water of Bontang city. The activity of catching on this fishes has been worked by fishermen who were staying in Bontang city. Hence, if, the catching activity on this fishes without control in the entire year, it will be predicted overfishing and decreasing resources. The aim of this research was to determine the degradation rate and depreciation rate of Bawis fishes’ resources in Marine water of Bontang city. The data were collected with interview method and questionnaire to the splint and nets fishermen, and stakeholder, as well as from the capture fisheries division of DKP3 institution in Bontang city for collecting of data of time series. The results showed that Bawis fishes’ resources in Bontang city were in degradation and depreciation indicated since 2013. It has been showed by the standard coefficient value was 0.59 and 0.64 more than 0.5 in 2013, further, in 2016 increased to 0.619 and 0.68 respectively. The values of increasing were each more than 0.5, it means that Bawis fishes’ resources in Bontang city were in degradation and depreciation.

scholarly journals Konstruksi Kedisiplinan melalui Habituasi Kegiatan Keagamaan

2021 ◽  
Vol 3 (2) ◽  
pp. 236-251
Author(s):  
Muhammad Muhlisin ◽  
Edi Nurhidin
Keyword(s):  
Time Series ◽  
Data Analysis ◽  
School Culture ◽  
Pattern Matching ◽  
Exemplary Teachers ◽  
Qualitative Approach ◽  
Student Discipline ◽  
Educational Institutions ◽  
School Activities ◽  
Interview Method

The low disciplinary behavior of students is one of the problems faced by many educational institutions. Even though discipline is the personality builder of the student. By practicing discipline, other good habits will come. Strengthening student discipline can be inserted through school activities or school culture according to the needs and conditions of the school. Therefore, this article describes the school culture in the form of istigasah activities to strengthen student discipline at SMP Al-Ikhlas Tarokan Kediri. This research uses a qualitative approach. The data collection was carried out using the interview method, observing, collecting and examining, and feeling. Data analysis used includes pattern matching, making explanations, and time series analysis. The results showed that the implementation of istigasah at SMP Al-Ikhlas Tarokan Kediri has been running well. However, some efforts are still needed so that these istigasah activities can be carried out consistently. Implemented methods include: implementing discipline, checking student notebooks, exemplary teachers, and using rewards and punishments.

scholarly journals Degradation Rate Location Dependency of Photovoltaic Systems

Energies ◽  
2020 ◽  
Vol 13 (24) ◽  
pp. 6751
Author(s):  
Alexander Frick ◽  
George Makrides ◽  
Markus Schubert ◽  
Matthias Schlecht ◽  
George E. Georghiou
Keyword(s):  
Time Series ◽  
Degradation Rate ◽  
Crystalline Silicon ◽  
Analytical Techniques ◽  
Climatic Conditions ◽  
Financial Risks ◽  
Performance Loss ◽  
Pv Systems ◽  
Main Challenge ◽  
Initial Hypothesis

A main challenge towards ensuring improved lifetime performance and reduction of financial risks of photovoltaic (PV) technologies remains the accurate degradation quantification of field systems and the dependency of this performance loss rate to climatic conditions. The purpose of this study is to address these technological issues by presenting a unified methodology for accurately calculating the degradation rate (RD) of PV systems and provide evidence that degradation mechanisms are location dependent. The method followed included the application of data inference and time series analytics, in the scope of comparing the long-term RD of different crystalline Silicon (c-Si) PV systems, installed at different climatic locations. The application of data quality and filtering steps ensured data fidelity for the RD analysis. The yearly RD results demonstrated that the adopted time series analytical techniques converged after 7 years and were in close agreement to the degradation results obtained from indoor standardized procedures. Finally, the initial hypothesis that the RD is location dependent was verified, since the multicrystalline silicon (multi-c-Si) systems at the warm climatic region exhibited higher degradation compared to the respective systems at the moderate climate. For the investigated monocrystalline silicon (mono-c-Si) systems the location-dependency is also affected by the manufacturing technology.

Multidimensional modeling of marine water body based on time series multi-surfaces

2007 ◽  
Author(s):  
Lihua Zhang ◽  
Xiaodong Yin ◽  
Qing Zhu ◽  
Yanchun Liu
Keyword(s):  
Time Series ◽  
Water Body ◽  
Marine Water ◽  
Multidimensional Modeling

scholarly journals ANALISIS DEGRADASI DAN DEPRESIASI SUMBERDAYA IKAN DEMERSAL PADA PERIKANAN DOGOL DI PERAIRAN SELAT SUNDA (Degradation and Depreciation Analysis of Demersal Fish Resources on Dogol Fisheries in Sunda Strait)

2016 ◽  
Vol 6 (2) ◽  
pp. 119
Author(s):  
Selvia Oktaviyani ◽  
Mennofatria Boer ◽  
. Yonvitner
Keyword(s):  
Time Series ◽  
Time Series Data ◽  
Mesh Size ◽  
Demersal Fish ◽  
Fishing Effort ◽  
Series Data ◽  
Preventive Action ◽  
Depreciation Rate ◽  
Average Value ◽  
Fish Resources

ABSTRACT<br /><br />Dogol is one type of fishing gear which is operated by fisherman in Sunda Strait with demersal fishes as dominant catches, such as goatfish, threadfin brean, ponyfish, Indian halibut and drums.The utilization was done throughout the year and without control can lead to overfishing. The aim of this research is to estimate degradation and the depreciation rate of demersal fish resources of dogol fisheries in Sunda Strait. This research was conducted on February until July 2014 in Coastal Fishing Port (PPP) Labuan, Pandeglang, Banten. Data was collected through interview and questionnaire methods to dogol fisherman and other stakeholders, as well as time series data from Ministry of Marine Affairs Pandeglang district. The results showed that the average value of degradation and depreciation rate of demersal fish resources were 0,26-0,42 and 0,26-0,43 respectively. Those values still below 0,5, it means that demersal fish resources on dogol fisheries in Sunda Strait has not been degraded and depreciation. But, the CPUE values tended to decrease, so was needed preventive action, such as restriction of fishing effort and increase the mesh size to preserve the sustainability of demersal fish resources.<br /><br />Keywords: Degradation, demersal fish, depreciation, dogol, Sunda Strait<br /><br />ABSTRAK<br /><br />Dogol merupakan salah satu jenis alat tangkap yang dioperasikan oleh nelayan di Perairan Selat Sunda dengan hasil tangkapan dominan yaitu ikan demersal seperti ikan biji nangka, kurisi, peperek, sebelah dan tigawaja. Kegiatan pemanfaatan yang dilakukan sepanjang tahun dengan tidak adanya pengontrolan dapat mengakibatkan tangkap lebih. Tujuan penelitian ini adalah untuk mengetahui laju degradasi dan laju depresiasi sumberdaya ikan demersal pada perikanan dogol di Perairan Selat Sunda. Penelitian dilaksanakan pada bulan Februari hingga Juli 2014 di Pelabuhan Perikanan Pantai (PPP) Labuan, Pandeglang, Banten. Pengumpulan data dilakukan melalui metode wawancara dan kuisioner terhadap nelayan dogol dan stakeholder lainnya serta data time series perikanan tangkap DKP Kabupaten Pandeglang. Hasil menunjukkan bahwa sumberdaya ikan demersal memiliki pola produksi yang berfluktuasi. Rata-rata nilai koefisien degradasi dan depresiasi sumberdaya ikan demersal adalah 0,26-0,42 dan 0,26-0,43 secara berurutan. Nilai-nilai tersebut masih dibawah 0,5, artinya sumberdaya ikan demersal pada perikanan dogol di Perairan Selat Sunda diduga belum mengalami degradasi dan depresiasi. Namun, nilai CPUE cenderung mengalami penurunan, sehingga diperlukan tindakan preventif seperti pembatasan upaya tangkap dan peningkatan ukuran mata jaring untuk menjaga kelestarian sumberdaya ikan demersal.<br /><br />Kata kunci: Degradasi, ikan demersal, depresiasi, dogol, Selat Sunda

Time Series Cross Correlation Analysis among Pollution Source and Adjacent Marine Water Environmental Factors

2014 ◽  
Vol 522-524 ◽  
pp. 56-59
Author(s):  
Ming Chang Li ◽  
Ying Jie Zhao
Keyword(s):  
Time Series ◽  
Environmental Factors ◽  
Correlation Analysis ◽  
Cross Correlation ◽  
Pollution Source ◽  
Marine Water ◽  
Computation Method ◽  
Correlation Relationship ◽  
Cross Correlation Analysis ◽  
The Cross

The cross correlation analysis of pollution time series among pollution source and adjacent marine water environmental factors is an essential tool for obtaining the relationship in adjacent marine waters and the source of pollution. Meanwhile, the main pollution source should be obtained by this analysis. In this paper, the cross correlation of the dissolved inorganic nitrogen (DIN) in the Caofeidian marine district, the Beidaihe marine district, Tangshan Bay and the whole quantity of pollution in main rivers of Hebei Province is analyzed. The cross correlation coefficient computation method is used for the correlation. The research results show that the stronger correlation relationship exists between the pollution source and the Beidaihe marine district, owing to the influence of the Luanhe river.

Triassic sponges (Sphinctozoa) from Hells Canyon, Oregon

1988 ◽  
Vol 62 (03) ◽  
pp. 419-423 ◽  
Author(s):  
Baba Senowbari-Daryan ◽  
George D. Stanley
Keyword(s):  
Endemic Species ◽  
Upper Triassic ◽  
Island Arc ◽  
Tropical Island ◽  
The Family ◽  
Wallowa Terrane ◽  
Unique Condition ◽  
Hells Canyon

Two Upper Triassic sphinctozoan sponges of the family Sebargasiidae were recovered from silicified residues collected in Hells Canyon, Oregon. These sponges areAmblysiphonellacf.A. steinmanni(Haas), known from the Tethys region, andColospongia whalenin. sp., an endemic species. The latter sponge was placed in the superfamily Porata by Seilacher (1962). The presence of well-preserved cribrate plates in this sponge, in addition to pores of the chamber walls, is a unique condition never before reported in any porate sphinctozoans. Aporate counterparts known primarily from the Triassic Alps have similar cribrate plates but lack the pores in the chamber walls. The sponges from Hells Canyon are associated with abundant bivalves and corals of marked Tethyan affinities and come from a displaced terrane known as the Wallowa Terrane. It was a tropical island arc, suspected to have paleogeographic relationships with Wrangellia; however, these sponges have not yet been found in any other Cordilleran terrane.

The LDE-Type Flare Occurrence (1969-1993)

1994 ◽  
Vol 144 ◽  
pp. 279-282
Author(s):  
A. Antalová
Keyword(s):  
Time Series ◽  
Fourier Analysis ◽  
Sunspot Cycle ◽  
List Type ◽  
Type Number ◽  
Solar Cycles ◽  
Type Iv ◽  
Long Duration ◽  
Cycle Maximum ◽  
Flare Index

AbstractThe occurrence of LDE-type flares in the last three cycles has been investigated. The Fourier analysis spectrum was calculated for the time series of the LDE-type flare occurrence during the 20-th, the 21-st and the rising part of the 22-nd cycle. LDE-type flares (Long Duration Events in SXR) are associated with the interplanetary protons (SEP and STIP as well), energized coronal archs and radio type IV emission. Generally, in all the cycles considered, LDE-type flares mainly originated during a 6-year interval of the respective cycle (2 years before and 4 years after the sunspot cycle maximum). The following significant periodicities were found:• in the 20-th cycle: 1.4, 2.1, 2.9, 4.0, 10.7 and 54.2 of month,• in the 21-st cycle: 1.2, 1.6, 2.8, 4.9, 7.8 and 44.5 of month,• in the 22-nd cycle, till March 1992: 1.4, 1.8, 2.4, 7.2, 8.7, 11.8 and 29.1 of month,• in all interval (1969-1992):a)the longer periodicities: 232.1, 121.1 (the dominant at 10.1 of year), 80.7, 61.9 and 25.6 of month,b)the shorter periodicities: 4.7, 5.0, 6.8, 7.9, 9.1, 15.8 and 20.4 of month.Fourier analysis of the LDE-type flare index (FI) yields significant peaks at 2.3 - 2.9 months and 4.2 - 4.9 months. These short periodicities correspond remarkably in the all three last solar cycles. The larger periodicities are different in respective cycles.

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