11 research outputs found
Bats!
No full textUAA Bookstore presents zoologist Jesika Reimer: Bats! Jesika Reimer is a zoologist at the Alaska Center for Conservation Science at UAA and has been studying bats in the north for the last eight years. She is currently involved in bat research throughout interior Alaska and has been studying a network of little brown myotis maternity colonies in the Copper River basin and along the Tanana River, to assess seasonal activity, roose preferences, and how nocturnal bats survive in the land of the midnight sun
accs-uaa/bering-sea-marine-invasives: Modeling Temperature and Salinity Suitability for Non-Native Species in the Bering Sea
No full textCode repository for, "Regional ocean models indicate changing limits to biological invasions in the Bering Sea" by A. Droghini, A. S. Fischbach, J. T. Watson, and J. P. Reimer. Includes R code to evaluate whether temperature and salinity conditions in the Bering Sea are suitable for the survival and reproduction of non-native species.</p
Nocturnality under the midnight sun: behavioural adaptations of the little brown bat (Myotis lucifugus) at 60°N latitude
No full textNorthern environments are highly dynamic with pronounced seasons and a large annual range in photoperiod. As latitude increases, summer ambient temperature is cooler and summer days lengthen. The goal of my research was to investigate how a hibernating, nocturnal mammal behaves at northern latitudes with the combination of short summers and short summer nights. I investigated the behaviour of Myotis lucifugus at 60°N in the Northwest Territories, Canada. I assessed the effects of cool ambient temperatures on the timing of hibernation and reproduction, nightly activity, and foraging efficiency compared to southern populations. I found that
M. lucifugus exit hibernation at cool ambient temperatures, exhibit delayed parturition, adjust their foraging behaviour to capitalize on reduced night length, and have higher foraging rates (i.e. reduced prey search time) which allow them to gain sufficient pre-hibernation mass. I suggest these adaptations allow populations to persist at northern latitudes
Data from: Seasonal phenology of the little brown bat (Myotis lucifugus) at 60°N
No full text<p>To investigate the impact of short summers and long summer solar periods at high latitudes on the behavior of a nocturnal, hibernating mammal, we recorded the phenology of <em>Myotis lucifugus </em>(little brown myotis) at 60<sup>o</sup>N in the Northwest Territories (NWT), Canada. In particular we assessed the timing of spring emergence from, and autumn entry into hibernation, reproduction, and seasonal mass fluctuations. We used a combination of acoustic monitoring and capture surveys at two hibernacula and two maternity roosts during 2011 and 2012. <em>Myotis </em>spp.<em> </em>were active at the hibernacula from late April to late September/early October, suggesting that the 'active' season length is similar to that of populations farther south. At maternity colonies, we detected <em>M. lucifugus </em>activity from early May to early October, with peaks during mid-July in both years. Lactation, fledging, and weaning all occurred later in the NWT than at more southern locations, and reproductive rates were significantly lower than rates observed further south. Average mass of individuals fluctuated throughout the season, with an initial decline immediately following emergence from hibernation likely reflecting increased energy expenditure due to flight and decreased use of torpor, coupled with relatively low prey intake due to low prey abundance associated with cool temperatures. Females did not appear to have lower pre-hibernation masses than those in more southern populations, suggesting that despite the cool spring and autumn temperatures, and short summer nights, bats are able to obtain enough energy for reproduction and mass accumulation for hibernation. However, the lower reproductive rates may indicate that there are limitations to life at the northern limits of the species' range.</p><p>Funding provided by: Natural Sciences and Engineering Research Council<br>Crossref Funder Registry ID: https://ror.org/01h531d29<br>Award Number: </p><p>Funding provided by: Alberta Conservation Association<br>Crossref Funder Registry ID: https://ror.org/030rn8443<br>Award Number: </p><p>Funding provided by: Bat Conservation International<br>Crossref Funder Registry ID: https://ror.org/04jp6nz39<br>Award Number: </p><p class="MsoNormal"><strong><span>Capture data</span></strong><span> - We used mist nets (Avinet Inc. Dryden, New York), to capture bats adjacent to the two <em>Myotis lucifugus</em> maternity colonies (Thebacha and Lady Evelyn Falls), and various foraging sites around the South Slave region, during 2011 (35 nights; May - Sep) and 2012 (23 nights; Jun - Sep). At maternity colonies, we captured bats during emergence, before they had an opportunity to feed, and at all sites we held bats in a cloth bag for ≥ 0.5 h to allow defecation prior to weighing. A small number of bats were caught post-foraging; these records have been marked with an asterix in the 'massinacuracy' column of the dataset and were omitted from the mass-related analysis. We identified individuals to species, sex, age (adult or juvenile) and reproductive condition, weighed them with a portable balance, measured forearm with calipers, fitted them with a unique band (2.9 mm; Porzana Ltd.,<span> </span>East Sussex, United Kingdom) for future identification, and released them at their point of capture. We classified adult females into three categories: 1) Pregnant: swollen abdomen, detection of fetus via palpation of abdomen, non-enlarged nipples; 2) Lactating: enlarged, calloused nipples, milk expressed with gentle massage of mammary glands; 3) Post lactating: enlarged keratinized nipples with no milk expression (Racey, 2009). Females captured prior to 1 June were not included when calculating reproductive rates as non-reproductive and early pregnancy females were indistinguishable by external examination. All volant juveniles were identified by evenly tapered phalangeal-metacarpal joints and un-fused epiphyseal plates observed by back-illuminating the wing (Brunet-Rossinni and Wilkinson, 2009). During November 2011, after hibernation was well underway, we entered both hibernacula and recorded sex, mass and forearm length for 45 bats captured from the cave walls (Walk-in cave: <em>n</em> = 5; South Slave hibernaculum: <em>n</em> = 40). All captures followed American Society of Mammalogists guidelines (Sikes et al., 2016) and were compliant with the University of Calgary Animal Care and Use Committee protocols (Animal Care Certificate BI09R-01).</span></p>
<p class="MsoNormal"><strong><span>Acoustic surveys</span></strong><span> – We recorded echolocation calls using AnaBat II ultrasonic detectors with CF-ZCAIMs set to a division ratio of 16 (Titley Electronics, Ballina, Australia). Detectors were placed at five sites including two hibernacula (Walk-in Cave and South Slave Hibernacula) and two beaver ponds (WBBP and NTBP) within 3 km of each hibernaculum, and at the Thebacha maternity colony. At Walk-in Cave, we placed the detector in a weatherproof box, 3 m from the entrance with the microphone pointed away from the entrance to prevent recording bats flying within the cave. Two detectors were installed in weatherproof boxes at the South Slave hibernaculum by the Government of the Northwest Territories, approximately 10 m from the cave entrance with the microphones positioned towards the cave entrance, but the restricted cave opening prevented recording of bat activity inside the cave. At the Thebacha maternity colony, we mounted the detector directly along a bat flight path outside the main building used by the colony, 3 m off the ground and 5 m from the bat exit. </span></p>
<p class="MsoNormal"><strong><span>Acoustic analysis</span></strong><span> - We reviewed all AnaBat files using AnaLookW version 3.2.15. We used a filter to extract <em>Myotis</em> spp. calls, identified by a minimum frequency ≥ 30 kHz , and counted files recorded per night. Bats with lower-frequency echolocation calls (primarily <em>E. fuscus</em>) were omitted from the data. Call characteristics of <em>M. lucifugus</em> and <em>M. septentrionalis</em> overlap (Fenton and Bell 1981), often making them indistinguishable with AnaBat II detectors, therefore, we did not attempt to remove <em>M. septentrionalis</em> calls from the data. The composition of Myotis captures (via mist-netting) at these sites averaged 86% <em>M. lucifugus</em> and 14% <em>M. septentrionali</em>s (n = 1118; Reimer and Barclay, DRYAD dataset), therefore, we assume that the <em>Myotis </em>echolocation passes in our data were largely representative of <em>M. lucifugus</em> activity.</span></p>
Phenomenon of unconsciousness
No full textTato bakalářká práce se zaměřuje na jedno z nejdiskutovanějších témat psychologie. Pozornost je zde věnována zakladateli psychoanalýzy - Sigmundu Freudovi. Ústředním tématem práce je nevědomí, jehož existenci autor považuje za nutnou. Práce analyzuje modely lidské psychiky v myšlení Sigmunda Freuda. Hlavním cíl práce je soustředěn na komparaci modelů a také na důvody vytvoření druhého - strukturálního - modelu, jež doplnil první - topografický - model.ObhájenoThis bachelor thesis concentrate on one of the most discussed topics of psychology in general. The attention will be focused on the founder of psychoanalysis, Sigmund Freud. The central theme of the work is unconsciousness. According to the author, the existence of the unconsciousness is necessary. In this work there are analyzed models of human psyche, which Freud introduced. The main goal was to compare these models and to say why the second - structural - model was added to the first - topographical - model
administrasi kurikulum
No full textarticle discusses about curriculum administration both in terms of meaning, process and the role of the teacher in curriculum administration. The curriculum is a set of designs and regulations that discuss the content, learning materials, and ways that can be used as guidelines in implementing the learning process. The method used by the author is to use the study literature. Namely by collecting various kinds of literature or reading sources in the form of journals, articles, and other book sources that discuss the topic of the problem that will be examined in this article. After that, the writer concludes the contents of the reading source based on her understanding. The curriculum has a very important role and influence to achieve the gosls of nation educational institutions regarding the administration of the curriculum is required to make the curriculum development process appropriate
Analisis Penerapan Akuntansi pada Usaha Perlengkapan Jahitan di Pekanbaru
No full textResearch conducted in Pekanbaru aimed to determine the extent to which the suitability of the application of the accounting is done by the employer supplies the Seams in Pekanbaru, whether in accordance with the principles of the basic accounting concepts and Accounting Standards of the Financial Entities Micro, Small, and Medium (SAK EMKM).
In this Study the data used is primary data and secondary data, where primary data obtained through the form of interviews , distributing questionnaires and documentation. While the secondary data obtained through sampling of records
of these efforts. After all the data is obtained, then the data is analyzed using descriptive method and in the conclude in the thesis. The author argues about the results of the research conducted that, the entrepreneur supplies the seams perform recording based on the cash basis. Employers also have not imposed the concept of unity of effort. Businessman fixtures seam to do the calculation of profit and loss once a month and the calculations are applied used as a guideline in its survival. Entrepreneurs haven't done penandingan between income and expenses appropriately. Based on the discussion and the results of research conducted it can be concluded that the application of the accounting that is done by employers Supplies of the Seam is not in accordance with Basic Accounting Concepts
Diet of Hoary (Lasiurus cinereus) and Silver-haired (Lasionycteris noctivagans) Bats While Migrating Through Southwestern Alberta in Late Summer and Autumn
No full textThe Use of Web-Based Portfolio as Alternatife Assesment in Biology Learning
No full textThe current state of the Covid-19 pandemic has had an impact on various ongoing activities, including learning activities. Currently, the government provides a policy to organize learning from home, known as Learning From Home (BDR). Learning From Home in its implementation requires the support of mobile devices. It is a challenge for both teachers and students to master technology in learning in these conditions. In addition, teachers must also be able to carry out the teaching and learning process or provide assessments/evaluations to students face-to-face (done online). The research objective is to determine the use of alternative assessment-based portfolios in biology learning. The authors want to introduce web-based portfolios as alternative assessments in biology learning in this study. Alternative assessments can support students to understand biology lessons with the task of making lab reports, making herbariums, drawing, writing widespread scientific reports, etc. These are collected in the form of website links. The research method used is a literature study that the author has carried out. The results obtained are using a web-based portfolio as an alternative assessment in biology learning, which is still not widely applied even though this assessment is very efficient to apply in biology learning during the Covid-19 pandemic. This research concludes that every lesson that has been carried out certainly needs to be assessed on student learning outcomes in following each lesson that has been followed. In this case, an alternative web-based portfolio assessment is one of the solutions to evaluate the performance and work of students so that all activities carried out can be rewarded with value.                Keywords: Biology Alternative Assessment, Web Based Portofolio Â
Decoding the structure of benzodithiophene polymers for high-efficiency organic solar cells
No full textThe data that support the findings of this study are available from the corresponding author upon reasonable request.The performance of organic electronic devices, such as solar cells, depends on understanding and controlling the solid-state microstructure of semiconducting polymers. In this study, a detailed understanding of the aggregate states, solid-state microstructure, and thermotropic behavior of the best-performing family of polymers for solar cells, i.e., benzodithiophene-based semiconducting polymers, is provided. Using D18, PBnDT-FTAZ, and PBDB-T-Cl as model systems, this study reveals a unique solid mesophase, distinct from previously observed polymer mesophases, comprising stacked solid-like and liquid-like layers. This mesophase resembles sanidic structures while also sharing features with columnar mesophases like condis crystals and paracrystals. At a larger length scale, it organizes into nanoscale fibril-like domains, with polymer backbones aligned along the fibril axis, coexisting with amorphous-like glassy regions, reported here for the first time. Notably, high-performance polymers such as D18, D18-Cl, and PM6 contain minimal glassy regions. The thermotropic behavior of this biphasic nanomorphology is also examined, providing insights into how thermal annealing influences polymer structure. Understanding these solid-aggregate states, the microstructure, and the thermal behavior enables a more precise framework for defining structure–function relationships in semiconducting polymers. This will have a significant impact on the entire field of organic electronics, from organic photovoltaics to bioelectronics to wearable electronics.J.M. thanks financial support from the MICIU (Grant Agreement No. PID2021-126243NB-I00), the European Research Council (Grant No. 101086805). J.A. thanks the CIF-UDC for her scholarship. C.M. thanks the Swedish Research Council for financial support (2022-02977). GIWAXS experiments were performed at NCD-SWEET beamline at ALBA Synchrotron with the collaboration of ALBA staff. The authors thank Alberto Peinador for the GIWAXS data of donor:acceptor blends. J.M. is grateful to O.M.V. for many fruitful overnight discussions. The authors acknowledge Universidade da Coruña /CISUG for the funding received for open access charges. H.A. acknowledges support by Goodnight Innovation Distinquished Professor endowment.Peer reviewe
