Academic literature on the topic 'Pollen sampling'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Pollen sampling.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Pollen sampling"

1

Suedy, Sri Widodo Agung, and Ni Putu Tasya Savitri. "Melisopalinologi Madu dari Temanggung." Buletin Anatomi dan Fisiologi 9, no. 1 (2024): 93–101. http://dx.doi.org/10.14710/baf.9.1.2024.93-101.

Full text
Abstract:
Melisopalinologi adalah studi terkait kandungan polen dalam madu, yang dapat menunjukkan karakteristik tumbuhan sumber pakan lebah, serta fitogeografinya sekitar sarang lebah. Penelitian ini bertujuan untuk menganalisis polen dalam madu dari lima daerah di Temanggung, guna mengetahui keanekaragaman tumbuhan pakan lebah dan karakteristik madunya. Sampel madu diambil secara purposive sampling dari 5 daerah di Temangung, kemudian dianalisis untuk identifikasi polen menggunakan teknik asetolisis. Telah teridentifikasi sebanyak 1855 butir polen yang terdiri dari 14 tipe polen, dimana 7 tipe teriden
APA, Harvard, Vancouver, ISO, and other styles
2

AOI, Hideki, Yue ZHAO, Kunio FUNAMI, Hiroyuki MIYAMOTO, and Tamotu HAYASE. "Improvement of pollen Sampling Device." Proceedings of The Computational Mechanics Conference 2002.15 (2002): 481–82. http://dx.doi.org/10.1299/jsmecmd.2002.15.481.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Khan, Gulzar, Albrecht Hegge, and Birgit Gemeinholzer. "Development and Testing of the A1 Volumetric Air Sampler, an Automatic Pollen Trap Suitable for Long-Term Monitoring of eDNA Pollen Diversity." Sensors 22, no. 17 (2022): 6512. http://dx.doi.org/10.3390/s22176512.

Full text
Abstract:
Airborne pollen surveys provide information on various aspects of biodiversity and human health monitoring. Such surveys are typically conducted using the Burkard Multi-Vial Cyclone Sampler, but have to be technically optimized for eDNA barcoding. We here developed and tested a new airborne pollen trap, especially suitable for autonomous eDNA-metabarcoding analyses, called the A1 volumetric air sampler. The trap can sample pollen in 24 different tubes with flexible intervals, allowing it to operate independently in the field for a certain amount of time. We compared the efficiency of the new A
APA, Harvard, Vancouver, ISO, and other styles
4

Rojo, Jesús, Jose Oteros, Antonio Picornell, et al. "Land-Use and Height of Pollen Sampling Affect Pollen Exposure in Munich, Germany." Atmosphere 11, no. 2 (2020): 145. http://dx.doi.org/10.3390/atmos11020145.

Full text
Abstract:
Airborne pollen concentrations vary depending on the location of the pollen trap with respect to the pollen sources. Two Hirst-type pollen traps were analyzed within the city of Munich (Germany): one trap was located 2 m above ground level (AGL) and the other one at rooftop (35 m AGL), 4.2 km apart. In general, 1.4 ± 0.5 times higher pollen amounts were measured by the trap located at ground level, but this effect was less than expected considering the height difference between the traps. Pollen from woody trees such as Alnus, Betula, Corylus, Fraxinus, Picea, Pinus and Quercus showed a good a
APA, Harvard, Vancouver, ISO, and other styles
5

Fitria, Rahmdani, and Nery Sofiyanti. "Kajian Palinologi Famili Asteraceae di Lingkungan Universitas Riau, Pekanbaru, Riau." Buletin Anatomi dan Fisiologi 9, no. 2 (2024): 121–29. https://doi.org/10.14710/baf.9.2.2024.121-129.

Full text
Abstract:
Universitas Riau merupakan salah satu daerah penyebaran berbagai tumbuhan, termasuk famili Asteraceae. Tujuan penelitian ini adalah untuk mengkaji karakter morfologi polen jenis-jenis Asteraceae dari kawasan Universitas Riau Kampus Bina Widya Km 12,5 Simpang Baru, Pekanbaru, Provinsi Riau. Pengambilan sampel di lapangan dilakukan dengan metode eksplorasi. Pembuatan preparat polen menggunakan metode tanpa asetolisis dan asetolisis dan karakter morfologinya diamati menggunakan mikroskop Olympus CX-23. Sebanyak 11 karakter diskor dan dianalisis menggunakan Ntsyst untuk membuat dendrogram. Karakte
APA, Harvard, Vancouver, ISO, and other styles
6

Longo, Loredana Rizzi, and Giovanni Cristofolini. "Airborne Pollen Sampling in Trieste (Italy)." Grana 26, no. 1 (1987): 91–96. http://dx.doi.org/10.1080/00173138709428908.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Suanno, Chiara, Silvia Sandrini, Iris Aloisi, et al. "Airborne Pollen, Allergens, and Proteins: A Comparative Study of Three Sampling Methods." Sustainability 14, no. 19 (2022): 11825. http://dx.doi.org/10.3390/su141911825.

Full text
Abstract:
Nowadays, there is a wide range of different methods available for the monitoring of pollen and allergens, but their relative efficiency is sometimes unclear, as conventional pollen monitoring does not thoroughly describe pollen allergenicity. This study aims to evaluate airborne pollen, allergen, and protein levels, associating them with meteorological and chemical parameters. The sampling was performed in Bologna (Italy) during the grass flowering period, with three different devices: a Cyclone sampler (CS), a Dicothomous sampler (DS), and a Berner impactor (BI). Total proteins were extracte
APA, Harvard, Vancouver, ISO, and other styles
8

Wang, Weiqian, Qingyue Wang, Senlin Lu, Yichun Lin, Miho Suzuki, and Yuma Saito. "Behavior of Autumn Airborne Ragweed Pollen and Its Size-Segregated Allergens (Amb a 1): A study in Urban Saitama, Japan." Atmosphere 14, no. 2 (2023): 247. http://dx.doi.org/10.3390/atmos14020247.

Full text
Abstract:
The prevalence of ragweed (Ambrosia artemisiifolia) pollinosis has been increasing worldwide. This study focused on the behavior of autumn airborne pollen and the major ragweed allergen -Amb a 1 particle in urban Saitama, Japan, in 2016. Burkard sampler results showed that the airborne ragweed pollen scattering season was from September 1st to October 9th. Over 83% of sampling events had pollen counts of over 13 grains/m3, indicating the high potential health risks of ragweed pollen in the atmosphere. The results of a surface plasmon resonance immunoassay (SPR) indicated that the average Amb a
APA, Harvard, Vancouver, ISO, and other styles
9

Mimić, Gordan, and Branko Šikoparija. "Analysis of airborne pollen time series originating from Hirst-type volumetric samplers—comparison between mobile sampling head oriented toward wind direction and fixed sampling head with two-layered inlet." Aerobiologia 37, no. 2 (2021): 321–31. http://dx.doi.org/10.1007/s10453-021-09695-7.

Full text
Abstract:
AbstractIn this study, we have compared time series of pollen concentration originating from two Hirst-type volumetric samplers that were equipped with different sampling heads. To collect airborne pollen, we have used classic sampler with mobile sampling head including wind vane and adapted sampler with fixed sampling head having two-layered inlet, like in Sigma-2 passive sampler. The devices were placed at the roof level, on the top of the building of the Faculty of Sciences located in Novi Sad, Serbia. The sampling of airborne pollen was performed from February until October 2019. Along wit
APA, Harvard, Vancouver, ISO, and other styles
10

Al-Nesf, Maryam Ali, Dorra Gharbi, Hassan M. Mobayed, et al. "Aerobiological monitoring in a desert type ecosystem: Two sampling stations of two cities (2017–2020) in Qatar." PLOS ONE 17, no. 7 (2022): e0270975. http://dx.doi.org/10.1371/journal.pone.0270975.

Full text
Abstract:
Background The increasing number of aerobiological stations empower comparative studies to determine the relationship between pollen concentrations in different localities and the appropriate distance, which should be established between sampling stations. In Qatar, this is basically the first aerobiological study for a continuous monitoring interval. Objectives The study aimed to assess the abundance and seasonality of the most prevalent pollen types, plus identify potential differences between two sites within the country. Methods Airborne pollen data were collected during 2017–2020 by using
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Pollen sampling"

1

Miki, Kenji. "Analysis of the influence of device-scale wind field on the sampling efficiency of pollen as a representative bioaerosol." Doctoral thesis, Kyoto University, 2020. http://hdl.handle.net/2433/253312.

Full text
Abstract:
京都大学<br>0048<br>新制・課程博士<br>博士(農学)<br>甲第22476号<br>農博第2380号<br>新制||農||1074(附属図書館)<br>学位論文||R2||N5256(農学部図書室)<br>京都大学大学院農学研究科地域環境科学専攻<br>(主査)教授 中村 公人, 教授 星野 敏, 教授 藤原 正幸<br>学位規則第4条第1項該当<br>Doctor of Agricultural Science<br>Kyoto University<br>DFAM
APA, Harvard, Vancouver, ISO, and other styles
2

Luo, Junxiang. "Goodness-of-fit tests for proportional odds model with GEE for ordinal categorical responses & estimating sampling frequency in pollen exposure assessment over time." Cincinnati, Ohio : University of Cincinnati, 2006. http://www.ohiolink.edu/etd/view.cgi?acc%5Fnum=ucin1150094586.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Stevenson, Clint W. "A Logistic Regression Analysis of Utah Colleges Exit Poll Response Rates Using SAS Software." BYU ScholarsArchive, 2006. https://scholarsarchive.byu.edu/etd/1116.

Full text
Abstract:
In this study I examine voter response at an interview level using a dataset of 7562 voter contacts (including responses and nonresponses) in the 2004 Utah Colleges Exit Poll. In 2004, 4908 of the 7562 voters approached responded to the exit poll for an overall response rate of 65 percent. Logistic regression is used to estimate factors that contribute to a success or failure of each interview attempt. This logistic regression model uses interviewer characteristics, voter characteristics (both respondents and nonrespondents), and exogenous factors as independent variables. Voter characteristic
APA, Harvard, Vancouver, ISO, and other styles
4

Cadman, Ann. "The relationship between pollen rain, vegetation, climate, meteorological factors and land-use in the PWV, Transvaal." Thesis, 1991. http://hdl.handle.net/10539/22026.

Full text
Abstract:
A two-year analysis of pollen rain was conducted in the Pretoria-Witwatersrand-Vereeniging district of the Transvaal, South Africa. Poaceae WaS the major component of the pollen assemblage, comprising 52% regionally. Of the total pollen count, 58.8% was non-seasonal and present throughout the year. During the analysis it became apparent that fungal spores dominated the atmospheric content, accounting for 94% of total airspora, considered here to incl ude pollen and fUngal spores.[Abbreviated Abstract. Open document to view full version].<br>AC2017
APA, Harvard, Vancouver, ISO, and other styles
5

Jhong, Yun-Syuan, and 鍾昀軒. "The simulation study of evaluating sampling plan and modeling the pollen spread of GM maize in the field scale: a case study in Puzih City, Chiayi County." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/e4wte7.

Full text
Abstract:
碩士<br>國立中興大學<br>農藝學系所<br>100<br>In recent years, following the development of genetic engineering, numerous genetically modified (GM) crops have been developed, and field planting has begun. Cross-pollination can occur between GM crops planted in open environments with wild relatives, conventional crops, and organic crops. This leads to exchange of genetic material, which result in the gene flow phenomenon. Therefore, studies on gene flow among GM crops primarily focus on pollen dispersal tendencies. However, to clearly understand the distribution of pollen dispersal, it always needs to select
APA, Harvard, Vancouver, ISO, and other styles

Books on the topic "Pollen sampling"

1

C, Smit P., and Van der Merwe Antoinette, eds. Opnamemetodes en -praktyk. Raad vir Geesteswetenskaplike Navorsing, 1986.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
2

Lake, Celinda C. Public opinion polling: A handbook for public interest and citizen advocacy groups. Island Press, 1987.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
3

Sampling & Identifying Allergenic Pollens & Molds. Blewstone Press, 2000.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
4

Smith, E. Grant. Sampling and identifying allergenic pollens and molds: An illustrated identification manual for air samplers. Blewstone Press, 1986.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
5

Salvanto, Anthony M. Exit Polling Today and What the Future May Hold. Edited by Lonna Rae Atkeson and R. Michael Alvarez. Oxford University Press, 2017. http://dx.doi.org/10.1093/oxfordhb/9780190213299.013.19.

Full text
Abstract:
This chapter considers exit polls from a researcher’s perspective, pointing out how it compares in terms of operation and sampling to more conventional pre-election polling and speculating about what future exit polling in the United States might look like. The chapter discusses the practical steps taken today to conduct post-election exit polling in the United States. Taken as a research study in itself, it discusses how exit polling might adapt over time in the context of the explosion in new data sources, lists, and new technologies, and—importantly—accounting for changes in the way America
APA, Harvard, Vancouver, ISO, and other styles
6

Gimpel, James G. Sampling for Studying Context. Edited by Lonna Rae Atkeson and R. Michael Alvarez. Oxford University Press, 2016. http://dx.doi.org/10.1093/oxfordhb/9780190213299.013.23.

Full text
Abstract:
Using the example of Ohio and its media markets, this chapter discusses the geographic distribution of respondents resulting from alternative sampling schemes. Traditional survey research designs for gathering information on voter attitudes and behavior usually ignore variability in context in favor of representation of a target population. When sample sizes are large, these polls also provide reasonably accurate estimates for focal subgroups of the electoral population. As the examples here show, conventional polls frequently lack the variations in geographic context likely to matter most to
APA, Harvard, Vancouver, ISO, and other styles
7

Berry, Justin, Youssef Chouhoud, and Jane Junn. Reaching Beyond Low-Hanging Fruit. Edited by Lonna Rae Atkeson and R. Michael Alvarez. Oxford University Press, 2016. http://dx.doi.org/10.1093/oxfordhb/9780190213299.013.1.

Full text
Abstract:
This chapter argues for the use of creative and targeted strategies rather than a one-size-fits-all approach to capturing information on low-incidence populations. It first conceptualizes low-incidence populations and highlights the existing empirical literature on them and then frames the challenges of polling these populations with an overview of sampling, contacting, and analytical strategies. It highlights the inherent trade-offs of each approach and points to the factors to consider when determining which strategy is best suited to particular research questions. It then details polling ef
APA, Harvard, Vancouver, ISO, and other styles
8

Seltzer, Richard. US Public Opinion since the 1930s. The Rowman & Littlefield Publishing Group, 2022. https://doi.org/10.5040/9781978737457.

Full text
Abstract:
This is both a history book and a book on public opinion. George Gallup, who pioneered survey sampling methods and whose name in fact became synonymous with public opinion polls, conducted his first survey in 1936. The main part of this book starts there as well. Dedicating a chapter to each decade from the 1930s to the present, Seltzer discusses historical events of the period and what the U.S. public thought of those events according to Gallup polls and other public opinion surveys. Each chapter is divided into the following categories: world events; U.S. politics; race; sex and gender; the
APA, Harvard, Vancouver, ISO, and other styles

Book chapters on the topic "Pollen sampling"

1

Ibrahim, Mohamed Ismail, Ali Al-Dousari, and Abeer Hassan Al-Saleh. "Pollen in Dust." In Atlas of Fallen Dust in Kuwait. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-66977-5_7.

Full text
Abstract:
Abstract Twenty-eight pairs of pollen and aeolian dust traps covering the State of Kuwait were used to obtain seasonal pollen counts of the most eight dominant families during 2009–2011 i.e. Chenopodiaceae, Poaceae (Gramineae), Cyperaceae, Leguminosae (Fabaceae), Cyperaceae, Brassicaceae, Malvaceae, Compositae, and Plantaginaceae. The sampling site locations were chosen to cover all the geomorphological sectors and native vegetation areas in Kuwait. Generally, pollen counts show us a remarkable distinction between the year 2009–2010 and 2010–2011, It is also evident that pollen counts (concent
APA, Harvard, Vancouver, ISO, and other styles
2

Rantio-Lehtimäki, Auli, E. Kauppinen, and A. Koivikko. "Efficiency of a New Bioaerosol Sampler in Sampling Betula Pollen for Antigen Analyses." In Experientia Supplementum. Birkhäuser Basel, 1987. http://dx.doi.org/10.1007/978-3-0348-7491-5_65.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Hahn, Annette, Enno Schefuß, Nicole Burdanowitz, et al. "Catchment and Depositional Studies for the Reconstruction of Past Environmental Change in Southern Africa." In Sustainability of Southern African Ecosystems under Global Change. Springer International Publishing, 2024. http://dx.doi.org/10.1007/978-3-031-10948-5_28.

Full text
Abstract:
AbstractTerrestrial signals in marine sedimentary archives are often used for reconstructing past environments, vegetation and climate, as well as for determining sediment fluxes, pathways, and depositional sites and changes in erosional runoff. It is therefore important to understand the origin, transport, and depositional processes of the various terrestrial sedimentary components in a depositional system. In this chapter, we use examples from southern Africa to show how source-to-sink studies have led to a clearer interpretation of downcore proxy records. Twelve rivers in four river catchme
APA, Harvard, Vancouver, ISO, and other styles
4

Bethlehem, Jelke. "Sampling." In Understanding Public Opinion Polls. Chapman and Hall/CRC, 2017. http://dx.doi.org/10.1201/9781315154220-5.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Galán-Soldevilla, Carmen, E. Ruiz de Clavijo, F. Infante, and G. Gallego. "Annual and Daily Variation of Pollen from Olea Europaea L. in the Atmosphere of Cordoba (Spain) Along Two Year of Sampling." In Experientia Supplementum. Birkhäuser Basel, 1987. http://dx.doi.org/10.1007/978-3-0348-7491-5_19.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Scherbaum, Frank. "The sampling process." In Of Poles and Zeros. Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-010-9572-3_5.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Scherbaum, Frank. "The sampling process." In Of Poles and Zeros. Springer Netherlands, 2001. http://dx.doi.org/10.1007/978-1-4020-6861-4_5.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Ortega-Recalde, Oscar, Julian R. Peat, Donna M. Bond, and Timothy A. Hore. "Estimating Global and Erasure Using Low-Coverage Whole-Genome Bisulfite (WGBS)." In Methods in Molecular Biology. Springer US, 2021. http://dx.doi.org/10.1007/978-1-0716-1294-1_3.

Full text
Abstract:
AbstractWhole-genome bisulfite sequencing (WGBS) is a popular method for characterizing cytosine methylation because it is fully quantitative and has base-pair resolution. While WGBS is prohibitively expensive for experiments involving many samples, low-coverage WGBS can accurately determine global methylation and erasure at similar cost to high-performance liquid chromatography (HPLC) or enzyme-linked immunosorbent assays (ELISA). Moreover, low-coverage WGBS has the capacity to distinguish between methylation in different cytosine contexts (e.g., CG, CHH, and CHG), can tolerate low-input mate
APA, Harvard, Vancouver, ISO, and other styles
9

Kathleen, Hess. "Allergenicity, Plant Pollen, And Mold Spores." In Environmental Sampling for UNKNOWNS. Routledge, 2017. http://dx.doi.org/10.1201/9780203756850-2.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Aida, Wan Noor, Arifullah Mohammed, and Kumara Thevan. "Palynology of Heterotrigona itama." In Advances in Environmental Engineering and Green Technologies. IGI Global, 2023. http://dx.doi.org/10.4018/978-1-6684-6265-2.ch010.

Full text
Abstract:
Meliponiculture is the practice of handling the stingless bee for a lot of beneficial products including honey, bee bread, and propolis. Heterotrigona itama is one of the most cultured species by bee keepers in Malaysia. This research objective was pollen identification from pollen pot of H. itama. Five colonies of H. itama were observed from September 2014 until August 2015 for the foraging and pollen collection. Meanwhile, for palynology studies, the pollen sampling was done for four periods, which are September 2014, December 2014, March 2015, and June 2015. from three districts: Jeli, Kota
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Pollen sampling"

1

Abramson, Alex, Evin Gultepe, Shivendra Pandey, and David H. Gracias. "Pollen inspired microscrapers for minimally invasive statistical tissue sampling." In 2018 IEEE Micro Electro Mechanical Systems (MEMS). IEEE, 2018. http://dx.doi.org/10.1109/memsys.2018.8346561.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Capone, P., L. Boccacci, S. Di Renzi, et al. "878 Airborne pollen sampling at two different heights: variation of concentrations in indoor and outdoor environments and implication for occupational health." In 32nd Triennial Congress of the International Commission on Occupational Health (ICOH), Dublin, Ireland, 29th April to 4th May 2018. BMJ Publishing Group Ltd, 2018. http://dx.doi.org/10.1136/oemed-2018-icohabstracts.148.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Reif, J. H., and S. Sen. "Polling: a new randomized sampling technique for computational geometry." In the twenty-first annual ACM symposium. ACM Press, 1989. http://dx.doi.org/10.1145/73007.73045.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Yang, Ai-ying, Lin Zuo, Ji Zhou, Yaojun Qiao, and Yu-nan Sun. "Periodically poled lithium niobate based ultra-wide bandwidth optical sampling oscilloscope." In International Conference on Optical Instruments and Technology (OIT2013), edited by Yi Dong, Xiaoyi Bao, Chao Lu, Xiangjun Xin, Scott S. Yam, and Xuping Zhang. SPIE, 2013. http://dx.doi.org/10.1117/12.2037981.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Ferm, P. M., C. Knapp, C. J. Wu, et al. "Ultrafast electrooptic effect in poled polymer films." In OSA Annual Meeting. Optica Publishing Group, 1991. http://dx.doi.org/10.1364/oam.1991.fg1.

Full text
Abstract:
We investigate the sensitivity and ultrafast electrooptic response of poled polymer films. Using a copolymer consisting of methyl methacrylate and red dye substituted methacrylate, we have poled films and integrated them into GaAs-based photoconductive switches. Our laser is a hybrid mode-locked dye laser providing 100-fs pulses at 830 nm. An excitation beam creates electrical transients and a probe beam is used for detection in the polymer via electrooptic sampling. We have sandwiched a 4-µm poled film on top of a monolithic GaAs switch and coplanar transmission line. Performing this experime
APA, Harvard, Vancouver, ISO, and other styles
6

Nahata, Ajay, Tony F. Heinz, David H. Auston, and Chengjiu Wu. "Coherent Detection of Freely Propagating Terahertz Radiation by Electro-optic Sampling in a Poled Polymer." In Organic Thin Films for Photonic Applications. Optica Publishing Group, 1995. http://dx.doi.org/10.1364/otfa.1995.pd6.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Noury, Keyvan, and Bingen Yang. "A Pseudo S-Plane Mapping of Z-Plane Root Locus." In ASME 2020 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/imece2020-23096.

Full text
Abstract:
Abstract In this paper, inspired by the geometric inversion transformation, a novel transformation of the z-plane root locus to a pseudo s-plane is proposed. In the z-plane, the stability of a discrete closed-loop system (a sampled-data control system) requires that all the system poles lie within the unit circle. In root locus analysis, the unit circle region seems congested, compared to the stability region of a continuous system, which is the left half of the s-plane. In the case of fast sampling, the poles of a discrete system can really be in a small neighborhood, thus making the control
APA, Harvard, Vancouver, ISO, and other styles
8

Poulsen, Dylan, Ian Gravagne, and John M. Davis. "Is Deterministic Real Time Control Always Necessary? A Time Scales Perspective." In ASME 2014 Dynamic Systems and Control Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/dscc2014-6093.

Full text
Abstract:
Practitioners of feedback control design often must spend a great deal of time and effort dealing with the complexities of deterministic, or “real time” computing. In this paper, we argue that if certain conditions are met, stable feedback control is possible under non-deterministic conditions. In particular, certain classes of linear systems may be uniformly exponentially stabilized by placing the closed-loop poles within an “osculating circle” if the statistics of the controller’s sampling times are known.
APA, Harvard, Vancouver, ISO, and other styles
9

A. C. Leandro, Marco, and Karl H. Kienitz. "Robust D-stability via discrete controllers for continuous-time uncertain systems with multiple delays." In Congresso Brasileiro de Automática - 2020. sbabra, 2020. http://dx.doi.org/10.48011/asba.v2i1.1549.

Full text
Abstract:
This work addresses the allocation of closed-loop poles of a discretized system from a continuous-time one with multiple input delays, aiming at its control through a computer. In order to handle a practical challenge presented in Network Control System (NCS) approaches, uncertain sampling period, distinct input time delays and parametric uncertainties in polytopic form can be propagated from the original state space representation to the discretized state model. The resulting discrete-time time-delay system has a very specific feature, so that it can be converted into an augmented linear syst
APA, Harvard, Vancouver, ISO, and other styles
10

Nagatsuma, Tadao, Makoto Yaita, and Mitsuru Shinagawa. "Electro-optic probing of integrated circuits by using poled polymers." In OSA Annual Meeting. Optica Publishing Group, 1992. http://dx.doi.org/10.1364/oam.1992.tubb2.

Full text
Abstract:
External electro-optic probing of high-speed integrated circuits has been conducted by using a semiconductor laser diode and an organic poled polymer as both a sampling pulse source and a superstrate electric-field sensor. Even though polymeric sensors are completely in contact with ICs to increase sensitivity and spatial resolution, the capacitive loading effect is negligible because of a low dielectric constant (ε ~ 3). The poled polymers used are state-of-the-art methacrylate side-chain copolymers having an electro-optic coefficient r33 of more than 10 pm/V at a wavelength of 1.3 μm. Poled
APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Pollen sampling"

1

Løvschal, Mette, and Havananda Ombashi. Palynological Sampling in Western Jutland 2021-22: Anthea Work Package #2. Det Kgl. Bibliotek, 2023. http://dx.doi.org/10.7146/aulsps-e.478.

Full text
Abstract:
A palynological sampling programme was carried out in three areas of Western Jutland in 2021-22. Our goal was to collect new sediment samples from archaeological excavations and peat deposits to reconstruct patterns in past heathland use and development. The location of the case areas was determined by the potential of the sites for combination with existing palynological data (Solsø Hede) and/or archaeological data (the Vejen area). At Solsø Hede, a pollen core was obtained near Solsø. At Vejen, two separate sediment collections took place. To the north of Vejen, in Gammelby Mose, peat sedime
APA, Harvard, Vancouver, ISO, and other styles
2

Løvschal, Mette, Havananda Ombashi, Marianne Høyem Andreasen, et al. The Protected Burial Mound ‘Store Vejlhøj’, Vinderup, Denmark: First Results. Det Kgl. Bibliotek, 2023. http://dx.doi.org/10.7146/aulsps-e.479.

Full text
Abstract:
An archaeological excavation of the protected burial mound Store Vejlhøj in northwestern Denmark was carried out in October-November 2021. The excavation formed part of the ERC-funded research project called ANTHEA, focusing on the deep history of anthropogenic heathlands. It was conducted by Aarhus University in collaboration with Holstebro Museum and Moesgaard Museum. The aim was to test a new method of sampling pollen data from different construction stages in a burial mound and comparing them with pollen data from nearby lake sediments with a view to improving our understanding of prehisto
APA, Harvard, Vancouver, ISO, and other styles
3

Taylor, S., J. Lever, K. Burgess, et al. Sampling interplanetary dust from Antarctic air. Engineer Research and Development Center (U.S.), 2022. http://dx.doi.org/10.21079/11681/43345.

Full text
Abstract:
We built a collector to filter interplanetary dust particles (IDPs) larger than 5 µm from the clean air at the Amundsen Scott South Pole station. Our sampling strategy used long duration, continuous dry filtering of near-surface air in place of short duration, high-speed impact collection on flags flown in the stratosphere. We filtered ~107 m³ of clean Antarctic air through 20 cm diameter, 3 µm filters coupled to a suction blower of modest power consumption (5–6 kW). Our collector ran continuously for 2 years and yielded 41 filters for analyses. Based on stratospheric concentrations, we predic
APA, Harvard, Vancouver, ISO, and other styles
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!