100 research outputs found
Aplikasi Dosen dan Karyawan: Membantu Mengelola Data Dosen dan Karyawan yang Ada di DAUH FTI
Divisi Administrasi Umum dan Humas (DAUH), Fakultas Teknologi Industri Universitas Islam Indonesia saat ini menyimpan data dosen dan karyawan menggunakan Excel, belum ada aplikasi yang dapat membantu penyimpanan data dengan mudah dan fleksibel, untuk itu akan dibuat sebuah aplikasi yang akan membantu DAUH dalam mengelola data dosen dan karyawan yang ada di FTI UII. Aplikasi bernama DOKAR kependekan dari Dosen dan Karyawan, sebuah aplikasi yang akan memudahkan pekerjaan DAUH dalam menyimpan data pegawai yang berkerja di Fakultas Teknologi Industri UII, Aplikasi ini dikembangkan untuk menggantikan data yang sekarang masih disimpan secara manual di file Excel
Ecosystem response persists after a prolonged marine heat wave
Some of the longest and most comprehensive marine ecosystem monitoring programs were
established in the Gulf of Alaska following the environmental disaster of the Exxon Valdez oil spill
over 30 years ago. These monitoring programs have been successful in assessing recovery from oil
spill impacts, and their continuation decades later has now provided an unparalleled assessment of
ecosystem responses to another newly emerging global threat, marine heatwaves. The 2014β2016
northeast Pacific marine heatwave (PMH) in the Gulf of Alaska was the longest lasting heatwave
globally over the past decade, with some cooling, but also continued warm conditions through
2019. Our analysis of 187 time series from primary production to commercial fisheries and nearshore
intertidal to offshore oceanic domains demonstrate abrupt changes across trophic levels, with many
responses persisting up to at least 5 years after the onset of the heatwave. Furthermore, our suite of
metrics showed novel community-level groupings relative to at least a decade prior to the heatwave.
Given anticipated increases in marine heatwaves under current climate projections, it remains
uncertain when or if the Gulf of Alaska ecosystem will return to a pre-PMH state."This project was made possible by the Gulf Watch Alaska (GWA) long-term ecosystem monitoring program with financial support by the Exxon Valdez Oil Spill Trustee Council (EVOSTC)."Ye
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State of the California current 2013-14: El niΓ±o looming
In 2013, the California current was dominated by strong coastal upwelling and high productivity. Indices of total cumulative upwelling for particular coastal locations reached some of the highest values on record. Chlorophyll a levels were high throughout spring and summer. Catches of upwelling-related fish species were also high. After a moderate drop in upwelling during fall 2013, the California current system underwent a major change in phase. Three major basin-scale indicators, the PDO, the NPGO, and the ENSO-MEI, all changed phase at some point during the winter of 2013/14. The PDO changed to positive values, indicative of warmer waters in the North Pacific; the NPGO to negative values, indicative of lower productivity along the coast; and the MEI to positive values, indicative of an oncoming El NiΓ±o. Whereas the majority of the California Current system appears to have transitioned to an El NiΓ±o state by August 2014, based on decreases in upwelling and chlorophyll a concentration, and increases in SST, there still remained pockets of moderate upwelling, cold water, and high chlorophyll a biomass at various central coast locations, unlike patterns seen during the more major El NiΓ±os (e.g., the 97-98 event). Catches of rockfish, market squid, euphausiids, and juvenile sanddab remained high along the central coast, whereas catches of sardine and anchovy were low throughout the CCS. 2014 appears to be heading towards a moderate El NiΓ±o state, with some remaining patchy regions of upwellingdriven productivity along the coast. Superimposed on this pattern, three major regions have experienced possibly non-El NiΓ±o-related warming since winter: the Bering Sea, the Gulf of Alaska, and offshore of southern California. It is unclear how this warming may interact with the predicted El NiΓ±o, but the result will likely be reduced growth or reproduction for many key fisheries species
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Translocation and hand-rearing of the short-tailed albatross Phoebastria albatrus: early indicators of success for species conservation and island restoration
Many endemic species, particularly those on
remote islands, have been driven to extinction or near extinction
by anthropogenic influences. The short-tailed albatross
Phoebastria albatrus once numbered in the millions
but was thought to be extinct by the mid 20th century.
Albatrosses, of the family Diomedeidae, are among the most
threatened birds globally as a result of commercial exploitation,
introduced predators, and mortality in commercial
fisheries. We applied an experimental approach over 5 years
to evaluate the translocation and hand-rearing of albatross
chicks by comparing growth, physiological health indices,
post-fledging survival, and migration patterns with a control
group of naturally reared chicks in the source population.
Hand-reared chicks had comparable or superior health and
similar rates of immediate post-fledging mortality (15%),
with mortality strongly female-biased in both groups.
Hand-reared birds had longer post-fledging drift periods
before attaining sustained flight (also female-biased) but
comparable, albeit somewhat wider ranging, migration
patterns to naturally reared chicks during their first 6
months at sea. Recruitment to the translocation site of a
breeding pair that included a hand-reared bird occurred
within 5 years of the first translocation. Success will ultimately
depend on continued recruitment and breeding over
the coming decades, given delayed breeding in these long-lived
species. The results to date, however, have exceeded
initial expectations and can inform potential reintroductions
of other long-lived, migratory avian species with
strong natal philopatry, and reintroductions of native
species to former breeding islands.Keywords: Post-release survival, Colony establishment, Recruitment, Migration, Reintroduction biology, Phoebastria albatrus, Short-tailed albatros
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State of the California current 2012-13: No such thing as an βaverageβ year
This report reviews the state of the California Current System (CCS) between winter 2012 and spring 2013, and includes observations from Washington State to Baja California. During 2012, large-scale climate modes indicated the CCS remained in a cool, productive phase present since 2007. The upwelling season was delayed north of 42Β°N, but regions to the south, especially 33Β° to 36Β°N, experienced average to above average upwelling that persisted throughout the summer. Contrary to the indication of high production suggested by the climate indices, chlorophyll observed from surveys and remote sensing was below average along much of the coast. As well, some members of the forage assemblages along the coast experienced low abundances in 2012 surveys. Specifically, the concentrations of all lifestages observed directly or from egg densities of Pacific sardine, Sardinops sagax, and northern anchovy, Engraulis mordax, were less than previous yearsβ survey estimates. However, 2013 surveys and observations indicate an increase in abundance of northern anchovy. During winter 2011/2012, the increased presence of northern copepod species off northern California was consistent with stronger southward transport. Krill and small-fraction zooplankton abundances, where examined, were generally above average. North of 42Β°N, salps returned to typical abundances in 2012 after greater observed concentrations in 2010 and 2011. In contrast, salp abundance off central and southern California increased after a period of southward transport during winter 2011/2012. Reproductive success of piscivorous Brandtβs cormorant, Phalacrocorax penicillatus, was reduced while planktivorous Cassinβs auklet, Ptychoramphus aleuticus was elevated. Differences between the productivity of these two seabirds may be related to the available forage assemblage observed in the surveys. California sea lion pups from San Miguel Island were undernourished resulting in a pup mortality event perhaps in response to changes in forage availability. Limited biological data were available for spring 2013, but strong winter upwelling coastwide indicated an early spring transition, with the strong upwelling persisting into early summer
Studies of colossal magnetoresistive oxides with radioactive isotopes
We propose to study Colossal Magnetoresistive (CMR) oxides with several nuclear techniques, which use radioactive elements at ISOLDE. Our aim is to provide local and element selective information on some of the doping mechanisms that rule electronic interactions and magnetoresistance, in a complementary way to the use of conventional characterisation techniques. Three main topics are proposed: \\ \\ a) Studies of local [charge and] structural modifications in antiferromagnetic LaMnO and LaRMnO with R=Ca and Cd, doped ferromagnetic systems with competing interactions: - research on the lattice site and electronic characterisation of the doping element. \\ \\ b) Studies of self doped LaRMnO systems, with oxygen and cation non-stoichiometry: -learning the role of defects in the optimisation of magnetoresistive properties. \\ \\ c) Probing the disorder and quenched random field effects in the vicinity of the charge or orbital Ordered/Ferromagnetic phase instability: - Investigating the local environment of ions at the Mn site, which trigger the ferromagnetic phase. Our approach to study these problems, combines complementary techniques such as Perturbed Angular Correlation, Emission Channeling and Electrical/Magnetic Measurements in pellets, single crystals and high quality thin films of CMR oxides doped with radioactive isotopes. Preliminary results obtained in La Cd MnO pellets and thin films implanted with Cd are also presented
Wind, Waves, and Wing Loading: Morphological Specialization May Limit Range Expansion of Endangered Albatrosses
Among the varied adaptations for avian flight, the morphological traits allowing large-bodied albatrosses to capitalize on wind and wave energy for efficient long-distance flight are unparalleled. Consequently, the biogeographic distribution of most albatrosses is limited to the windiest oceanic regions on earth; however, exceptions exist. Species breeding in the North and Central Pacific Ocean (Phoebastria spp.) inhabit regions of lower wind speed and wave height than southern hemisphere genera, and have large intrageneric variation in body size and aerodynamic performance. Here, we test the hypothesis that regional wind and wave regimes explain observed differences in Phoebastria albatross morphology and we compare their aerodynamic performance to representatives from the other three genera of this globally distributed avian family. In the North and Central Pacific, two species (short-tailed P. albatrus and waved P. irrorata) are markedly larger, yet have the smallest breeding ranges near highly productive coastal upwelling systems. Short-tailed albatrosses, however, have 60% higher wing loading (weight per area of lift) compared to waved albatrosses. Indeed, calculated aerodynamic performance of waved albatrosses, the only tropical albatross species, is more similar to those of their smaller congeners (black-footed P. nigripes and Laysan P. immutabilis), which have relatively low wing loading and much larger foraging ranges that include central oceanic gyres of relatively low productivity. Globally, the aerodynamic performance of short-tailed and waved albatrosses are most anomalous for their body sizes, yet consistent with wind regimes within their breeding season foraging ranges. Our results are the first to integrate global wind and wave patterns with albatross aerodynamics, thereby identifying morphological specialization that may explain limited breeding ranges of two endangered albatross species. These results are further relevant to understanding past and potentially predicting future distributional limits of albatrosses globally, particularly with respect to climate change effects on basin-scale and regional wind fields
Haul-Out Behavior of Harbor Seals (Phoca vitulina) in Hood Canal, Washington
The goal of this study was to model haul-out behavior of harbor seals (Phoca vitulina) in the Hood Canal region of Washington State with respect to changes in physiological, environmental, and temporal covariates. Previous research has provided a solid understanding of seal haul-out behavior. Here, we expand on that work using a generalized linear mixed model (GLMM) with temporal autocorrelation and a large dataset. Our dataset included behavioral haul-out records from archival and VHF radio tag deployments on 25 individual seals representing 61,430 seal hours. A novel application for increased computational efficiency allowed us to examine this large dataset with a GLMM that appropriately accounts for temporal autocorellation. We found significant relationships with the covariates hour of day, day of year, minutes from high tide and year. Additionally, there was a significant effect of the interaction term hour of day : day of year. This interaction term demonstrated that seals are more likely to haul out during nighttime hours in August and September, but then switch to predominantly daylight haul-out patterns in October and November. We attribute this change in behavior to an effect of human disturbance levels. This study also examined a unique ecological event to determine the role of increased killer whale (Orcinus orca) predation on haul-out behavior. In 2003 and 2005 these harbor seals were exposed to unprecedented levels of killer whale predation and results show an overall increase in haul-out probability after exposure to killer whales. The outcome of this study will be integral to understanding any changes in population abundance as a result of increased killer whale predation
High Natality Rates of Endangered Steller Sea Lions in Kenai Fjords, Alaska and Perceptions of Population Status in the Gulf of Alaska
Steller sea lions experienced a dramatic population collapse of more than 80% in the late 1970s through the 1990s across their western range in Alaska. One of several competing hypotheses about the cause holds that reduced female reproductive rates (natality) substantively contributed to the decline and continue to limit recovery in the Gulf of Alaska despite the fact that there have been very few attempts to directly measure natality in this species. We conducted a longitudinal study of natality among individual Steller sea lions (nβ=β151) at a rookery and nearby haulouts in Kenai Fjords, Gulf of Alaska during 2003β2009. Multi-state models were built and tested in Program MARK to estimate survival, resighting, and state transition probabilities dependent on whether or not a female gave birth in the previous year. The models that most closely fit the data suggested that females which gave birth had a higher probability of surviving and giving birth in the following year compared to females that did not give birth, indicating some females are more fit than others. Natality, estimated at 69%, was similar to natality for Steller sea lions in the Gulf of Alaska prior to their decline (67%) and much greater than the published estimate for the 2000s (43%) which was hypothesized from an inferential population dynamic model. Reasons for the disparity are discussed, and could be resolved by additional longitudinal estimates of natality at this and other rookeries over changing ocean climate regimes. Such estimates would provide an appropriate assessment of a key parameter of population dynamics in this endangered species which has heretofore been lacking. Without support for depressed natality as the explanation for a lack of recovery of Steller sea lions in the Gulf of Alaska, alternative hypotheses must be more seriously considered
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