cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.5258/soton/d0365
title: Dataset for Integrating Flexible Filament Circuits for EâTextile Applications

description: Dataset supports: Komolafe, A. et al. (2019). Integrating Flexible Filament Circuits for E-Textile Applications. Advanced Materials Technologies.Practical wearable e‐textiles must be durable and retain, as far as possible, the textile properties such as drape, feel, lightweight, breathability, and washability that make fabrics suitable for clothing. Early e‐textile garments were realized by inserting standard portable electronic devices into bespoke pockets and arranging interconnects and cabling across the garment. In these examples, the textile merely served as a vehicle to house the electronics and had no inherent electronic functionality. A reduction in electronic component size, the development of flexible circuits, and the ability to weave robust interconnects offer the potential for improved levels of electronic integration within the textile. The weaving of electronic circuit filaments less than 2 mm wide into fabrics such that the electronics are fully concealed in the textile and given extra protection by the surrounding textile fibers is introduced. The failure mechanisms for different filament circuit designs before and after integration into the textile are investigated with a 90° cyclical bending test. Results show that encapsulated filament circuits embedded within the textile survive 45 washing cycles and more than 1500 cycles of 90° bending around a bending radius of 10 mm, performing five times better than equivalent filament circuits before integration into the fabric.
DOI: 10.17632/wprt4grtfj.1
title: Data for: Brain drain, informality and inequality: a search-and-matching model for sub-Saharan Africa

description: The zip folder contains all the data and codes used for the analysis. It also has a readme file to facilitate replication.
DOI: 10.5519/qd.vc282m4h
title: Query on the Natural History Museum Data Portal (data.nhm.ac.uk) (1 records)
DOI: 10.5255/ukda-sn-853724
title: Interviews with party officials and activists 2016-2018
DOI: 10.5281/zenodo.3250669
title: Webis-Ambient-15

description: This corpus is an extension of the Ambient data set created by Carpineto and Romano. For each subtopic, the websites of the given URLs were downloaded (if accessible). Those documents are named as the original documents, for example, 1/1.4/1.3.html. Each subtopic was then manually enriched to ten documents with websites retrieved by Google (for example, 1/1.1/g00.html - 'g' for Google, 00 for the first Google result). Some subtopics could not be sufficently enriched and were discarded. Moreover, some subtopics were duplicates or not interpretable and were also discarded. The data sets consists of 44 topics (topics.txt) and 481 subtopics (subtopics.txt). Some subtopics are topically very similar and therefore rather difficult to be clustered. These subtopics (11.2, 12.13, 14.2, 19.33, 20.2, 20.5, 21.2, 24.3, 24.4, 27.26, 31.16, 36.7, 44.9) are discarded in the file subtopics-filtered.txt, which lists only the remaining 468 subtopics.
description: {"references": ["Tim Gollub, Matthias Busse, Benno Stein, and Matthias Hagen. Keyqueries for Clustering and Labeling. In 12th Asia Information Retrieval Societies Conference (AIRS 2016), pages 42-55, November 2016. Springer."]}
DOI: 10.5281/zenodo.3250678
title: Themed Evidence: Reading Experiences - Gold Standard

description: Exploring digital resources in search of pieces of evidence relevant to a certain research theme is a difficult and important task for humanities research. The concept of evidence is a particularly difficult one, as it relates to a fact being reported in a text, which is relevant to a certain subject of enquiry. 

The UK Reading Experience Database Project (UK RED) is an open-access dataset containing records that document the history of reading in Britain from 1450 to 1945. Evidence of reading presented in UK RED is drawn from published and unpublished sources as diverse as diaries, commonplace books, memoirs, sociological surveys, and criminal court and prison records. See  http://www.open.ac.uk/Arts/reading/UK. 

This dataset is a gold standard for supporting the evaluation of competing methods for detecting themed evidence of "reading experience".
DOI: 10.5281/zenodo.3250668
title: Webis-Ambient-15

description: This corpus is an extension of the Ambient data set created by Carpineto and Romano. For each subtopic, the websites of the given URLs were downloaded (if accessible). Those documents are named as the original documents, for example, 1/1.4/1.3.html. Each subtopic was then manually enriched to ten documents with websites retrieved by Google (for example, 1/1.1/g00.html - 'g' for Google, 00 for the first Google result). Some subtopics could not be sufficently enriched and were discarded. Moreover, some subtopics were duplicates or not interpretable and were also discarded. The data sets consists of 44 topics (topics.txt) and 481 subtopics (subtopics.txt). Some subtopics are topically very similar and therefore rather difficult to be clustered. These subtopics (11.2, 12.13, 14.2, 19.33, 20.2, 20.5, 21.2, 24.3, 24.4, 27.26, 31.16, 36.7, 44.9) are discarded in the file subtopics-filtered.txt, which lists only the remaining 468 subtopics.
description: {"references": ["Tim Gollub, Matthias Busse, Benno Stein, and Matthias Hagen. Keyqueries for Clustering and Labeling. In 12th Asia Information Retrieval Societies Conference (AIRS 2016), pages 42-55, November 2016. Springer."]}
DOI: 10.5281/zenodo.3250686
title: Webis-Bias-Flipper-18

description: The Webis Bias Flipper 2018 (Webis-Bias-Flipper-2018) comprises 2781 events from allsides.com as of June 1st, 2012 till February 10, 2018. For each event, the title, the summary, all news portals belonging to the event, and the links to the news portals with respective bias were recorded. After that, we crawled the news portals with the given links to retrieve their headlines and the content of all articles, because the content is not provided on allsides.com. For each event we collected the corresponding news articles. A total of 6458 news articles are collected.
description: {"references": ["Wei-Fan Chen, Henning Wachsmuth, Khalid Al-Khatib, and Benno Stein. Learning to Flip the Bias of News Headlines. In 11th International Natural Language Generation Conference (INLG 2018), pages 79-88, November 2018. Association for Computational Linguistics"]}
DOI: 10.5281/zenodo.3250685
title: Webis-Bias-Flipper-18

description: The Webis Bias Flipper 2018 (Webis-Bias-Flipper-2018) comprises 2781 events from allsides.com as of June 1st, 2012 till February 10, 2018. For each event, the title, the summary, all news portals belonging to the event, and the links to the news portals with respective bias were recorded. After that, we crawled the news portals with the given links to retrieve their headlines and the content of all articles, because the content is not provided on allsides.com. For each event we collected the corresponding news articles. A total of 6458 news articles are collected.
description: {"references": ["Wei-Fan Chen, Henning Wachsmuth, Khalid Al-Khatib, and Benno Stein. Learning to Flip the Bias of News Headlines. In 11th International Natural Language Generation Conference (INLG 2018), pages 79-88, November 2018. Association for Computational Linguistics"]}
DOI: 10.5281/zenodo.3250671
title: LIBS-wallscanner dataset related to "Scanning laser-induced breakdown spectrometer for mine walls" thesis

description: This is a LIBS dataset published alongside the thesis in related identifiers. For better description see the thesis publication.
DOI: 10.17632/gwbg24hkrw.1
title: Data for: Study on the site effects of seismic stations in Sichuan, China

description: These data is calculated by using the classical spectral decay method.
DOI: 10.5281/zenodo.3250579
title: PDF projections for the HL-LHC and the LHeC

description: For the foreseeable future, the exploration of the high-energy frontier will be the domain of the Large Hadron Collider (LHC). Of particular significance will be its high-luminosity upgrade (HL-LHC), which will operate until the mid- 2030s. In this endeavour, for the full exploitation of the HL-LHC physics potential an improved understanding of the parton distribution functions (PDFs) of the proton is critical. 

Since its start of data taking, the LHC has provided an impressive wealth of information on the quark and gluon structure of the proton. Indeed, modern global analyses of parton distribution functions (PDFs) include a wide range of LHC measurements of processes such as the production of jets, electroweak gauge bosons, and top quark pairs. Here we provide quantitative projections for global PDF fits that include the information expected from the High-Luminosity LHC (HL-LHC) in the LHAPDF format. These projections have been already used in particular in the HL-LHC CERN Yellow Reports. 

The HL-LHC program would be uniquely complemented by the proposed Large Hadron electron Collider (LHeC), a high-energy lepton-proton and lepton-nucleus collider based at CERN. Here we also present PDF projections based on the  expected LHeC measurements of inclusive and heavy quark structure functions. These projections are presented both for the LHeC individually, and also in connection with the HL-LHC pseudo-data.

The list of LHAPDF sets that is made available in this repository are the following:


	PDF4LHC15_nnlo_hllhc_scen1_lhec.tgz : Based on the PDF4LHC15 global fit supplemented by HL-LHC pseudo-data in Scenario 1 and also by the LHeC pseudo-data.
	PDF4LHC15_nnlo_hllhc_scen2_lhec.tgz : Based on the PDF4LHC15 global fit supplemented by HL-LHC pseudo-data in Scenario 2 and also by the LHeC pseudo-data.
	PDF4LHC15_nnlo_hllhc_scen3_lhec.tgz : Based on the PDF4LHC15 global fit supplemented by HL-LHC pseudo-data in Scenario 3 and also by the LHeC pseudo-data.
	PDF4LHC15_nnlo_lhec.tgz : Based on the PDF4LHC15 global fit supplemented by the LHeC pseudo-data.
	PDF4LHC15_nnlo_hllhc_scen1.tgz : Based on the PDF4LHC15 global fit supplemented by HL-LHC pseudo-data in Scenario 1. 
	PDF4LHC15_nnlo_hllhc_scen2.tgz : Based on the PDF4LHC15 global fit supplemented by HL-LHC pseudo-data in Scenario 2. 
	PDF4LHC15_nnlo_hllhc_scen3.tgz Based on the PDF4LHC15 global fit supplemented by HL-LHC pseudo-data in Scenario 3.
DOI: 10.5281/zenodo.3250580
title: PDF projections for the HL-LHC and the LHeC

description: For the foreseeable future, the exploration of the high-energy frontier will be the domain of the Large Hadron Collider (LHC). Of particular significance will be its high-luminosity upgrade (HL-LHC), which will operate until the mid- 2030s. In this endeavour, for the full exploitation of the HL-LHC physics potential an improved understanding of the parton distribution functions (PDFs) of the proton is critical. 

Since its start of data taking, the LHC has provided an impressive wealth of information on the quark and gluon structure of the proton. Indeed, modern global analyses of parton distribution functions (PDFs) include a wide range of LHC measurements of processes such as the production of jets, electroweak gauge bosons, and top quark pairs. Here we provide quantitative projections for global PDF fits that include the information expected from the High-Luminosity LHC (HL-LHC) in the LHAPDF format. These projections have been already used in particular in the HL-LHC CERN Yellow Reports. 

The HL-LHC program would be uniquely complemented by the proposed Large Hadron electron Collider (LHeC), a high-energy lepton-proton and lepton-nucleus collider based at CERN. Here we also present PDF projections based on the  expected LHeC measurements of inclusive and heavy quark structure functions. These projections are presented both for the LHeC individually, and also in connection with the HL-LHC pseudo-data.

The list of LHAPDF sets that is made available in this repository are the following:


	PDF4LHC15_nnlo_hllhc_scen1_lhec.tgz : Based on the PDF4LHC15 global fit supplemented by HL-LHC pseudo-data in Scenario 1 and also by the LHeC pseudo-data.
	PDF4LHC15_nnlo_hllhc_scen2_lhec.tgz : Based on the PDF4LHC15 global fit supplemented by HL-LHC pseudo-data in Scenario 2 and also by the LHeC pseudo-data.
	PDF4LHC15_nnlo_hllhc_scen3_lhec.tgz : Based on the PDF4LHC15 global fit supplemented by HL-LHC pseudo-data in Scenario 3 and also by the LHeC pseudo-data.
	PDF4LHC15_nnlo_lhec.tgz : Based on the PDF4LHC15 global fit supplemented by the LHeC pseudo-data.
	PDF4LHC15_nnlo_hllhc_scen1.tgz : Based on the PDF4LHC15 global fit supplemented by HL-LHC pseudo-data in Scenario 1. 
	PDF4LHC15_nnlo_hllhc_scen2.tgz : Based on the PDF4LHC15 global fit supplemented by HL-LHC pseudo-data in Scenario 2. 
	PDF4LHC15_nnlo_hllhc_scen3.tgz Based on the PDF4LHC15 global fit supplemented by HL-LHC pseudo-data in Scenario 3.
DOI: 10.5523/bris.nyqkgnysra9q2ic5dok0swnbg
title: Data from Appendix B in Carriage of Bacterial Pathogens in the Bovine Upper Respiratory Tract: Effects of Respiratory Virus Vaccination

description: Data which relate to Appendix B of the doctoral thesis by Amy Thomas entitled "Carriage of Bacterial Pathogens in the Bovine Upper Respiratory Tract: Effects of Respiratory Virus Vaccination"
DOI: 10.21227/z902-4t15
title: PCBs Laser Scans

description: This dataset contains laser scans of PCBs as explained in "Fault Diagnosis in Microelectronics Attachment via Deep Learning Analysis of 3D Laser Scans". On the left and right image, we have a closer look at one circuitmodule of a PCB , before and after die attachment. Notice the different types of glue annotated as A, B, C, D and E. On each circuit there are four glue deposits on each type where approximately the same quantity of glue has been placed. As explainedin our paper the top three deposits are used for training and the bottom one for testing. On top, we see a magnified view of glue regions before and after the attachment of dies.
DOI: 10.21227/zpsk-ww44
title: PCBs Laser Scans

description: This dataset contains laser scans of PCBs as explained in "Fault Diagnosis in Microelectronics Attachment via Deep Learning Analysis of 3D Laser Scans". On the left and right image, we have a closer look at one circuitmodule of a PCB , before and after die attachment. Notice the different types of glue annotated as A, B, C, D and E. On each circuit there are four glue deposits on each type where approximately the same quantity of glue has been placed. As explainedin our paper the top three deposits are used for training and the bottom one for testing. On top, we see a magnified view of glue regions before and after the attachment of dies.
DOI: 10.17632/k6xkjc2bf7.1
title: IKKα kinase regulates the DNA damage response and drives chemo-resistance in Cancer. Colomer et al
DOI: 10.20375/0000-000c-1f68-e
title: Sphaera -- Edge and Book data

description: This collection contains raw data used in the publication Emergence of Scientific Trends, published in the scope of the The Sphere- Project of the Max-Planck-Institute for the History of Science
The project investigates the knowledge tradition that is interwoven with the history of one book: De sphaera of Johannes de Sacrobosco.
DOI: 10.20375/0000-000c-1f69-d
title: books.csv
DOI: 10.20375/0000-000c-1f6a-c
title: edges.csv
DOI: 10.5281/zenodo.3250707
title: Geographic variation of tree height of Pinus pinea L. gathered from common gardens in Europe

description: This dataset collects individual georeferenced tree height data from <em>Pinus pinea </em>L. planted in common gardens in France and Spain, between years 1993 and 1997. The experimental design varies depending on the common garden, from a randomized complete to incomplete block design, RCB or RIB, respectively. The final dimensions of this database is 56,624 individual tree height measurements <em> </em>with 9 common gardens and 55 different provenances. The data can be used to assess genetic variation and phenotypic plasticity with further applications in biogeography and forest management.
description: From the list of coauthors listed above, the following are  responsible of the raw data:  Bruno  FADY and Sven MUTKE
description: {"references": ["Mutke S, Gordo J, Chambel MR, et al (2010) Phenotypic plasticity is stronger than adaptative differentiation among Mediterranean stone pine provenances. For Syst 19:354. doi: 10.5424/fs/2010193-9097", "Mutke S, Gordo IJ, Khouja ML, Fady B (2013) Low genetic and high environmental diversity at adaptive traits in Pinus pinea from provenance tests in France and Spain. Options M\u00e9diterran\u00e9ennes, A, no. 105, 73-80."]}
DOI: 10.5281/zenodo.3250760
title: 8_Tapado Data

description: This is the dataset from Tapado Glacier (Chilean Andes) on a debris-covered site in 2013 to 2015. A new version has been uploaded due to a couple data errors in the original version.

Please look at the metadata file (TAP_20132015_AWS_metadata.docx) and the project "Readme" file (uploaded separately)  for more information about the content of the files.
DOI: 10.7910/dvn/7vkw4s/cq5pbv
title: TEScodebook.pdf

description: Codebook.
DOI: 10.7910/dvn/7vkw4s/jfekt8
title: TESdataPublicFinal.xls

description: Dataset.
DOI: 10.7910/dvn/ikpzpu/a55xii
title: DegreesOfDemocracyUS.tab

description: Dataset for US.
DOI: 10.7910/dvn/ikpzpu/cdhj4x
title: DegreesOfDemoracyUK.tab

description: Dataset for UK.
DOI: 10.7910/dvn/ikpzpu/tgoixx
title: DegreesOfDemocracyCA.tab

description: Dataset for Canada.
DOI: 10.7910/dvn/ikpzpu/uplds2
title: DegreesOfDemocracyDataCodebook.pdf

description: Codebook (for all datasets)
DOI: 10.7910/dvn/wudp15/1ttuii
title: Diagnóstico.tab

description: :unav
DOI: 10.6073/pasta/83161b1c4ff43726e8eef89923fddf61
title: Tree, shrub, and herb data from 10 Hillslope Project sites located in Macon County, North Carolina, within the Upper Little Tennessee River Basin

description: Vegetation was surveyed on 10 sites in the upper Little Tennessee River watershed in Macon County, North Carolina during the summer of 2012. The sites represent a gradient of development, including forested sites, agricultural sites, and exurban sites. All woody vegetation &gt;2.5 cm diameter at breast height (DBH) was measured and identified within twelve 10 x 10 m plots at each site. Woody shrubs &gt;0.5 m in height and &lt;2.5 cm DBH were counted and identified within a 1x10 m transect in each plot. Herbs and woody plants &lt;0.5m in height were identified and percent cover estimated in 3 1 x 1 m subplots located within each of the larger 10 x 10 m plots.
DOI: 10.7910/dvn/n2xiqv/hzccjz
title: Asentamientos.tab

description: :unav
DOI: 10.7910/dvn/u2hvb6/2s8cop
title: A__1__20170508_151556.wav

description: :unav
DOI: 10.7910/dvn/u2hvb6/2vjw5h
title: A_A_Summary.txt

description: :unav
DOI: 10.7910/dvn/u2hvb6/3fyqhv
title: A.PGM

description: :unav
DOI: 10.7910/dvn/u2hvb6/ckvkid
title: A__1__20170508_152656.wav

description: :unav
DOI: 10.7910/dvn/u2hvb6/cpqqmt
title: A__1__20170508_153756.wav

description: :unav
DOI: 10.7910/dvn/u2hvb6/cv0pca
title: A__1__20170508_150502.wav

description: :unav
DOI: 10.7910/dvn/xdz4a6/rlvx87
title: CDNSpendingCodebook.pdf

description: :unav
DOI: 10.5061/dryad.58k2h35/1
title: Dryad Item 10.5061/DRYAD.58K2H35/1

description: (:tba)
DOI: 10.5061/dryad.58k2h35/2
title: Dryad Item 10.5061/DRYAD.58K2H35/2

description: (:tba)
DOI: 10.5061/dryad.58k2h35/3
title: Dryad Item 10.5061/DRYAD.58K2H35/3

description: (:tba)
DOI: 10.7910/dvn/u2hvb6/dunekn
title: A__1__20170508_155956.wav

description: :unav
DOI: 10.7910/dvn/u2hvb6/ejchxx
title: A__1__20170508_154856.wav

description: :unav
DOI: 10.7910/dvn/u2hvb6/f4fjdw
title: A__1__20170508_170556.wav

description: :unav
DOI: 10.7910/dvn/u2hvb6/gkn8r4
title: A__1__20170508_163256.wav

description: :unav
DOI: 10.7910/dvn/u2hvb6/ms6lqc
title: A__1__20170508_165456.wav

description: :unav
DOI: 10.7910/dvn/u2hvb6/ngxaqq
title: A__1__20170508_162156.wav

description: :unav
DOI: 10.7910/dvn/u2hvb6/yv0xq5
title: A__1__20170508_164356.wav

description: :unav
DOI: 10.7910/dvn/u2hvb6/yyhqyj
title: A__1__20170508_161056.wav

description: :unav
DOI: 10.7910/dvn/xdz4a6/hnlg6w
title: CDNSpendingPublic.xls

description: Dataset.
DOI: 10.3886/e100002v3
title: US Historical Newspapers Readership Surveys, 1929-1970.

description: The focus of this data collection was the historical overlap in readership of US daily newspapers in several city markets in the period spanning 1929-1970. These data are obtained from readership surveys conducted by the newspapers themselves or by advertising associations. The data report the average daily readership of groups of daily newspapers in a given city and year.<br>The sampling is determined by the newspapers or the advertising associations that conducted the readership surveys.<br>
DOI: 10.5061/dryad.58k2h35/4
title: Dryad Item 10.5061/DRYAD.58K2H35/4

description: (:tba)
DOI: 10.5061/dryad.58k2h35/5
title: Dryad Item 10.5061/DRYAD.58K2H35/5

description: (:tba)
DOI: 10.5061/dryad.58k2h35/6
title: Dryad Item 10.5061/DRYAD.58K2H35/6

description: (:tba)
DOI: 10.7910/dvn/u2hvb6/cdgxkx
title: A__1__20170508_172756.wav

description: :unav
DOI: 10.7910/dvn/u2hvb6/fkqrhg
title: A__1__20170508_184456.wav

description: :unav
DOI: 10.7910/dvn/u2hvb6/g9ni3n
title: A__1__20170508_182256.wav

description: :unav
DOI: 10.7910/dvn/u2hvb6/kogiyq
title: A__1__20170508_183356.wav

description: :unav
DOI: 10.7910/dvn/u2hvb6/qyuqid
title: A__1__20170508_173856.wav

description: :unav
DOI: 10.7910/dvn/u2hvb6/uo2dbb
title: A__1__20170508_174956.wav

description: :unav
DOI: 10.7910/dvn/u2hvb6/vib75y
title: A__1__20170508_180056.wav

description: :unav
DOI: 10.7910/dvn/u2hvb6/wbuf1p
title: A__1__20170508_171656.wav

description: :unav
DOI: 10.7910/dvn/u2hvb6/xx5hzy
title: A__1__20170508_181156.wav

description: :unav
DOI: 10.17894/ucph.f911517f-c627-422f-8635-6a23468af16b
title: The microbial community in degrading bones exposed to different environments data
DOI: 10.7910/dvn/u2hvb6/2b65fx
title: A__1__20170508_185556.wav

description: :unav
DOI: 10.7910/dvn/u2hvb6/hq1v6z
title: A__1__20170508_191756.wav

description: :unav
DOI: 10.7910/dvn/u2hvb6/jk2h5d
title: A__1__20170508_190656.wav

description: :unav
DOI: 10.7910/dvn/u2hvb6/musfip
title: A__1__20170508_200156.wav

description: :unav
DOI: 10.7910/dvn/u2hvb6/qpgba2
title: A__1__20170508_192856.wav

description: :unav
DOI: 10.7910/dvn/u2hvb6/uwes1s
title: A__1__20170508_195056.wav

description: :unav
DOI: 10.7910/dvn/u2hvb6/zzq5mj
title: A__1__20170508_193956.wav

description: :unav
DOI: 10.5281/zenodo.3250871
title: rcarragh/bhpm_simulation_study v1.0

description: Simulation study for bhpm.
DOI: 10.7910/dvn/u2hvb6/0dnzc0
title: A__1__20170508_205656.wav

description: :unav
DOI: 10.7910/dvn/u2hvb6/2mchfc
title: A__1__20170508_203456.wav

description: :unav
DOI: 10.7910/dvn/u2hvb6/8ydonz
title: A__1__20170508_214056.wav

description: :unav
DOI: 10.7910/dvn/u2hvb6/dwfi4b
title: A__1__20170508_211856.wav

description: :unav
DOI: 10.7910/dvn/u2hvb6/juqc9l
title: A__1__20170508_201256.wav

description: :unav
DOI: 10.7910/dvn/u2hvb6/rg7ir1
title: A__1__20170508_204556.wav

description: :unav
DOI: 10.7910/dvn/u2hvb6/rsvpaq
title: A__1__20170508_210756.wav

description: :unav
DOI: 10.7910/dvn/u2hvb6/si9m6t
title: A__1__20170508_202356.wav

description: :unav
DOI: 10.7910/dvn/u2hvb6/ygrjwi
title: A__1__20170508_212956.wav

description: :unav
DOI: 10.17632/fs6kzp8m2w.1
title: Formation and propagation processes over the time of quantum fractals

description: A video file [45], with a representation of the formation and propagation processes over the time of quantum fractals generated in the examined wave guide, was created based on the calculations in the study (http://dx.doi.org/10.17632/mcfmdzjm6d.2). Since the wave guide is a resonator, after two fronts of high frequency oscillations meet in its center, only waves satisfying the resonance conditions exist, i.e. a whole number of halfwaves must fit between the walls of the wave guide. Wavelengths differing from resonance ones are suppressed. Therefore, fractal structures emerge due to resonance oscillations in the wave guide inter-wall space.