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Journal articles on the topic 'Radio mean number'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Ashika, T. S., and S. Asha. "Radio Contra Harmonic Mean Number of Graphs." Indian Journal Of Science And Technology 17, no. 16 (2024): 1647–53. http://dx.doi.org/10.17485/ijst/v17i16.539.

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Objectives: To explore the least upper bound of graphs by radio contra harmonic labeling. Methods: Contra harmonic mean function or , radio mean labeling condition and radio harmonic mean labeling are used. Findings: Here we introduce radio contra harmonic mean labeling and its least upper bound, designated as radio contra harmonic mean number, by formulating the constraints. Novelty: Based on radio mean labeling and contra harmonic mean labeling, the new concept of radio contra harmonic mean labeling was established. The bounds of some special graphs are encountered here. This kind of labelin

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2

T, S. Ashika, and Asha S. "Radio Contra Harmonic Mean Number of Graphs." Indian Journal of Science and Technology 17, no. 16 (2024): 1647–53. https://doi.org/10.17485/IJST/v17i16.539.

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Abstract <strong>Objectives:</strong> To explore the least upper bound of graphs by radio contra harmonic labeling. <strong>Methods:</strong> Contra harmonic mean function or , radio mean labeling condition and radio harmonic mean labeling are used. <strong>Findings:</strong> Here we introduce radio contra harmonic mean labeling and its least upper bound, designated as radio contra harmonic mean number, by formulating the constraints. <strong>Novelty:</strong> Based on radio mean labeling and contra harmonic mean labeling, the new concept of radio contra harm

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T, Arputha Jose, Daniel Raj A, Venugopal P, and Giridaran M. "Radio antipodal mean number of quadrilateral Snake families." Indian Journal of Science and Technology 14, no. 13 (2021): 1071–80. https://doi.org/10.17485/IJST/v14i13.295.

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Abstract <strong>Objectives:</strong> In communication engineering, the assignment of channels or frequencies to different transmitters in a communication network without interference is an important problem. Finding the span for such an assignment is a challenging task. The objective of this study is to find the span of quadrilateral snake families. <strong>Method:</strong> The solution to the channel assignment problem can be found out by modeling the communication network as a graph, where the transmitters are represented by nodes and connectivity between transmitters are giv

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ELrokh, Ashraf, Mohammed M. Ali Al-Shamiri, and Atef Abd El-hay. "A Novel Radio Geometric Mean Algorithm for a Graph." Symmetry 15, no. 3 (2023): 570. http://dx.doi.org/10.3390/sym15030570.

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Radio antennas switch signals in the form of radio waves using different frequency bands of the electromagnetic spectrum. To avoid interruption, each radio station is assigned a unique number. The channel assignment problem refers to this application. A radio geometric mean labeling of a connected graph G is an injective function h from the vertex set, V(G) to the set of natural numbers N such that for any two distinct vertices x and y of G, h(x)·h(y)≥diam+1−d(x,y). The radio geometric mean number of h, rgmn(h), is the maximum number assigned to any vertex of G. The radio geometric mean number

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Xavier, D. Antony, and R. C. Thivy arathi. "Radio Antipodal Mean Number of Certain Graphs." International Journal of Mathematics Trends and Technology 54, no. 6 (2018): 467–70. http://dx.doi.org/10.14445/22315373/ijmtt-v54p556.

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6

Jose, T. Arputha, A. Daniel Raj, P. Venugopal, and M. Giridaran. "Radio antipodal mean number of quadrilateral Snake families." Indian Journal of Science and Technology 14, no. 13 (2021): 1071–80. http://dx.doi.org/10.17485/ijst/v14i13.295.

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7

P, Poomalai, Vikramaprasad R, and Malliga P. "Radio Analytic Mean Number of some Subdivision Graphs." Journal of Advanced Research in Dynamical and Control Systems 12, no. 05-SPECIAL ISSUE (2020): 577–83. http://dx.doi.org/10.5373/jardcs/v12sp5/20201793.

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8

Saraswathi, Meera, K. N. Meera, and Yuqing Lin. "Radio Mean Labeling Algorithm, Its Complexity and Existence Results." Mathematics 13, no. 13 (2025): 2057. https://doi.org/10.3390/math13132057.

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Radio mean labeling of a connected graph G is an assignment of distinct positive integers to the vertices of G satisfying a mathematical constraint called radio mean condition. The maximum label assigned to any vertex of G is called the span of the radio mean labeling. The minimum span of all feasible radio mean labelings of G is the radio mean number of G, denoted by rmn(G). In our previous study, we proved that if G has order n, then rmn(G)∈[n,rmn(Pn)] where Pn is a path of order n. All graphs of diameters 1, 2 and 3 have the radio mean number equal to order n. However, they are not the only

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V. T., Brindha Mary, C. David Raj, and C. Jayasekaran. "EVEN RADIO MEAN GRACEFUL LABELING ON DEGREE SPLITTING OF SNAKE RELATED GRAPHS." South East Asian J. of Mathematics and Mathematical Sciences 18, no. 02 (2022): 197–204. http://dx.doi.org/10.56827/seajmms.2022.1802.18.

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A radio mean labeling of a connected graph G is an injection φ from the vertex set V(G) to N such that the condition d(u, v) + & φ(u)+φ(v) 2 ' ≥ 1 + diam(G) holds for any two distinct vertices u and v of G. A graph which admits radio mean labeling is called radio mean graph. The radio mean number of φ, rmn(φ), is the maximum number assigned to any vertex of G. The radio mean number of G, rmn(G), is the minimum value of rmn(φ) taken over all radio mean labeling φ of G. In this paper we introduce a new concept even radio mean graceful labeling and we investigate th

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10

Nicholas, T., and K. John Bosco. "Radio mean D-distance number of cycle-related graphs." International Journal of Mathematics Trends and Technology 40, no. 3 (2016): 247–51. http://dx.doi.org/10.14445/22315373/ijmtt-v40p530.

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11

Et. al., Meera Saraswathi,. "Radio Mean Labeling Of Paths And Its Total Graph." Turkish Journal of Computer and Mathematics Education (TURCOMAT) 12, no. 1S (2021): 343–50. http://dx.doi.org/10.17762/turcomat.v12i1s.1843.

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A graph labeling problem is an assignment of labels to the vertices or edges (or both) of a graph G satisfying some mathematical condition. Radio Mean Labeling, a vertex-labeling of graphs with non-negative integers has a significant application in the study of problems related to radio channel assignment. The maximum label used in a radio mean labeling is called its span, and the lowest possible span of a radio mean labeling is called the radio mean number of a graph. In this paper, we obtain the radio mean number of paths and total graph of paths.

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Badr, Elsayed, Shokry Nada, Mohammed M. Ali Al-Shamiri, Atef Abdel-Hay, and Ashraf ELrokh. "A Novel Mathematical Model for Radio Mean Square Labeling Problem." Journal of Mathematics 2022 (January 12, 2022): 1–9. http://dx.doi.org/10.1155/2022/3303433.

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A radio mean square labeling of a connected graph is motivated by the channel assignment problem for radio transmitters to avoid interference of signals sent by transmitters. It is an injective map h from the set of vertices of the graph G to the set of positive integers N , such that for any two distinct vertices x , y , the inequality d x , y + h x 2 + h y 2 / 2 ≥ dim G + 1 holds. For a particular radio mean square labeling h , the maximum number of h v taken over all vertices of G is called its spam, denoted by rmsn h , and the minimum value of rmsn h taking over all radio mean square label

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Selvaraj, R., S. Vidyanandini, and Soumya Ranjan Nayak. "Radial radio mean labelling of Grotzsch graph and some graphs." Journal of Discrete Mathematical Sciences and Cryptography 27, no. 4 (2024): 1377–87. http://dx.doi.org/10.47974/jdmsc-1992.

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A graph G is undirected with V vertices and E edges. This study introduces radial radio mean labelling of graphs, a novel method of graph labelling. A radial radio mean labelling of the undirected graph G is a function g : V(G) → {1, 2, …, n} that satisfies the requirement g(u) + g(v)/2 between any two nodes u, v belongs to G and r(G) is the radius of G. The greatest integer in the range of a radial radio mean labelling g is the span, and it is represented by span (g). The minimal span over all G radial radio mean labelling is known as the radial radio mean number rrmn(G). The radial radio mea

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14

Poomalai, P., R. Vikramaprasad, and P. Malliga. "ON RADIO ANALYTIC MEAN D-DISTANCE NUMBER OF MORE GRAPHS." Advances in Mathematics: Scientific Journal 9, no. 11 (2020): 9237–45. http://dx.doi.org/10.37418/amsj.9.11.29.

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A Radio Analytic Mean D-distance labeling of associated diagram $G$ is a balanced guide $v$ from the vertex set $V(G)$ to $N$ such that for two distinct vertices $u$ and $v$ of $G$. $d^D\left(u,v\right) +\left\lceil \frac{\left|f({u)}^2-f(v)^2\right|}{2}\right\rceil \ge 1+\ {diam}^{D\ }(G)$.

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15

K, John Bosco, and Priya S. "On Radio Geometric Mean D - Distance Number of Some Basic Graphs." International Journal of Mathematics Trends and Technology 67, no. 2 (2021): 103–8. http://dx.doi.org/10.14445/22315373/ijmtt-v67i2p514.

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K. Johnbosco et al.,, K. Johnbosco et al ,. "On Radio Heronian Mean D-Distance Number of Cycle Related Graphs." International Journal of Mathematics and Computer Applications Research 11, no. 1 (2021): 37–42. http://dx.doi.org/10.24247/ijmcarjun20214.

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K, John Bosco, and Dinesh M. "On Radio Heronian D-distance Mean Number of Degree Splitting Graphs." International Journal of Mathematics Trends and Technology 67, no. 2 (2021): 114–20. http://dx.doi.org/10.14445/22315373/ijmtt-v67i2p516.

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18

Giridaran, M., T. Arputha Jose, and E. Anto Jeony. "On the radio antipodal geometric mean number of ladder related graphs." Malaya Journal of Matematik 10, no. 01 (2022): 98–109. http://dx.doi.org/10.26637/mjm1001/009.

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19

Jose, T. Arputha, R. Prabakaran, and R. Gomathy. "On the Radio Antipodal Mean Number of Some Grid Related Graphs." Communications in Mathematics and Applications 14, no. 2 (2023): 745–58. http://dx.doi.org/10.26713/cma.v14i2.2043.

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20

K, John Bosco, and Vishnupriya B S. "The Radio Dd-Distance in Harmonic Mean Number of Some New Graphs." International Journal of Mathematics Trends and Technology 67, no. 2 (2021): 121–23. http://dx.doi.org/10.14445/22315373/ijmtt-v67i2p517.

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21

Banerjee, Swapan. "On The Radio Antipodal Mean Number of Certain Types of Ladder Graphs." International Journal of Innovative Research in Science, Engineering and Technology 9, no. 3 (2020): 1062–67. http://dx.doi.org/10.15680/ijirset.2020.0903127.

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22

Yenoke, Kins, Arputha Jose T, and Venugopal P. "On The Radio Antipodal Mean Number of Certain Types of Ladder Graphs." International Journal of Innovative Research in Science, Engineering and Technology 09, no. 06 (2020): 4607–14. http://dx.doi.org/10.15680/ijirset.2020.0906001.

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Banerjee, Swapan. "On The Radio Antipodal Mean Number of Certain Types of Ladder Graphs." International Journal of Innovative Research in Science, Engineering and Technology 9, no. 8 (2020): 8559–64. http://dx.doi.org/10.15680/ijirset.2020.0908001.

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24

las, T. Nicho, K. John Bosco, and V. Vi ola. "On Radio Mean D-Distance Number of Graph Obtained from Graph Operation." International Journal of Mathematics Trends and Technology 58, no. 2 (2018): 98–106. http://dx.doi.org/10.14445/22315373/ijmtt-v58p514.

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25

K.Sunitha. "Radial Radio Pell Mean Labeling of Subdivision of Graphs." Advances in Nonlinear Variational Inequalities 28, no. 2 (2024): 267–73. http://dx.doi.org/10.52783/anvi.v28.1969.

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A one-one mapping ϕ : V (G) → N for a connected graph G is defined as follows: d(x,y)+⌈(ϕ(x)+2ϕ(y))/2⌉≥1+r(G), where radius is denoted by r(G). Any vertex in G has a radial radio pell mean number of ϕ which is the maximum number and is represented by rrpmn(ϕ). Here, we look at the labeling of various graphs using the radial radio pell mean of subdivisions such as subdivision of star graph S(K_(1,n)) , subdivision of path graph S(Pn) , subdivision of friendship graph S(Fn), subdivision of wheel graph S(Wn), subdivision of quadrilateral book graph S(QB(4,3)), subdivision of closed helm graph S(C

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26

Bolarin, O., and C. C. Mogor. "Analysis of Media Use Preferences among Coconut Farmers in Western Zone of Lagos State, Nigeria." Journal of Agricultural Research and Development 19, no. 1 (2021): 32–37. http://dx.doi.org/10.4314/jard.v19i1.5.

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The study investigated the media use preference among coconut farmers in the western zone of Lagos state, Nigeria. A total number of 120 coconut farmers were selected for the study. Data were collected with the use of interview schedule and analyzed with frequency count, percentage, mean and Chi-square statistics. The usage mean rank showed that mobile phone (mean=4.49), radio (mean=4.47) and television (mean=4.09) were ranked first, second and third respectively. The highest ranked preferred media were radio (mean=4.63), agricultural extension officers (mean=4.43) and fellow farmers (mean=4.3

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27

Aasi, Muhammad Shahbaz, Muhammad Asif, Tanveer Iqbal, and Muhammad Ibrahim. "Radio Labelings of Lexicographic Product of Some Graphs." Journal of Mathematics 2021 (December 7, 2021): 1–6. http://dx.doi.org/10.1155/2021/9177818.

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Labeling of graphs has defined many variations in the literature, e.g., graceful, harmonious, and radio labeling. Secrecy of data in data sciences and in information technology is very necessary as well as the accuracy of data transmission and different channel assignments is maintained. It enhances the graph terminologies for the computer programs. In this paper, we will discuss multidistance radio labeling used for channel assignment problems over wireless communication. A radio labeling is a one-to-one mapping ℘ : V G ⟶ ℤ + satisfying the condition | ℘ μ − ℘ μ ′ | ≥ diam G + 1 − d μ , μ ′ :

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Rajchowski, Piotr, Jacek Stefanski, Jaroslaw Sadowski, and Krzysztof K. Cwalina. "Person Tracking in Ultra-Wide Band Hybrid Localization System Using Reduced Number of Reference Nodes." Sensors 20, no. 7 (2020): 1984. http://dx.doi.org/10.3390/s20071984.

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In this article a novel method of positional data integration in an indoor hybrid localization system combining inertial navigation with radio distance measurements is presented. A point of interest is the situation when the positional data and the radio distance measurements are obtained from less than thee reference nodes and it is impossible to unambiguously localize the moving person due to undetermined set of positional equations. The presented method allows to continuously provide localization service even in areas with disturbed propagation of the radio signals. Authors performed simula

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Nirod, Kumar Sahoo, kumar Das Soubhagya, Kumar Mohanty Sujit, Kumar Ludam Rakesh, and Dhal Satyaprakash. "Prevalence of Malignancy in Cholelithiasis: A Cross-Sectional Study in a Tertiary Care Hospital of Odisha." International Journal of Pharmaceutical and Clinical Research 15, no. 12 (2023): 1124–27. https://doi.org/10.5281/zenodo.11199336.

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Gall stone is the most common risk factor for carcinoma gall bladder. The aim of this study is to find out the prevalence of malignancy in patients with Cholelithiasis in Western Odisha, as no epidemiological data is available for Odisha. All the radio logically diagnosed cased of cholelithiasis underwent surgery were taken into consideration. All the cases of cholelithiasis operated of in General Surgery Department of VSSIMSAR, Burla were considered for study. The diagnosis confirmed by Ultra sonography/MRCP in Department of Radio diagnosis. Total numbers of patients operated are 347, out of

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Alfionita, Silvana, and Fakhri Ikhwanul Alifin. "Preventive Maintenance Analysis Based on Mean Time Between Failure (MTBF) and Mean Time to Repair (MTTR)." Angkasa: Jurnal Ilmiah Bidang Teknologi 15, no. 2 (2023): 201. http://dx.doi.org/10.28989/angkasa.v15i2.1833.

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A company's ability to meet its goals depends heavily on the smooth operation of its production process. To ensure that the production machinery operates smoothly and without any breakdowns, it is essential to implement effective maintenance that addresses any issues related to the equipment. This research aims to identify the root causes of equipment failure in the soda and dolomite bucket elevator by analyzing the Mean Time Between Failure (MTBF), Mean Time to Repair (MTTR), and conducting a qualitative evaluation using Failure Mode Effects Analysis (FMEA). The analysis reveals that the comp

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Turner, Paul. "P11 Using novel technology to improve communication to and between pharmacy staff." Archives of Disease in Childhood 107, no. 5 (2022): e25.13-e25. http://dx.doi.org/10.1136/archdischild-2022-nppg.20.

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AimTo explore possible alternatives to the current radio-pager communication system following the department of health’s order for their removal by the end of 2021. To analyse the feasibility and practicality of these systems and implement the most appropriate choice into practice.MethodAnalytical tools including driver diagrams and process maps were constructed and examined to identify possible alternatives to the current radio-pager system. Systems such as Microsoft Teams® and Whatsapp ® were considered but were discredited due to concerns surrounding information governance. CareFlow, a syst

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32

Liu, Jie, Hong-Guang Wang, Zhen Yan, et al. "Identifying Subcomponents of Mean Pulse Profiles of PSR B1822–09 with Single Pulses." Astrophysical Journal 975, no. 1 (2024): 7. http://dx.doi.org/10.3847/1538-4357/ad77aa.

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Abstract Using observational data obtained with the Five-hundred-meter Aperture Spherical radio Telescope, we succeeded in identifying subcomponents of different pulse profile components of PSR B1822−09 by the phase-to-phase cross correlations between intensity sequences of single pulses. The determined number of the subcomponents and edges of the subcomponents are consistent with the results of Gaussian fitting on the mean pulse profiles of PSR B1822−09. According to the results, the main pulse (MP) in both the radio burst mode (B mode) and the radio-quiet mode (Q mode), the precursor (PC), a

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Parma, P., H. R. DE RUITER, and R. Fanti. "Low Luminosity Radio Galaxies." Symposium - International Astronomical Union 175 (1996): 137–42. http://dx.doi.org/10.1017/s0074180900080335.

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This review talk will deal almost exclusively with the radio aspects of low luminosity radio galaxies, as the other wavelength bands (optical, X, IR) are covered by others during this conference. By low radio luminosity we mean a radio power at 20 cm in the range 1019 to 1024,5 W Hz–1 (Hubble constant of 100, as throughout this talk). At the upper limit occurs the “break” in the radio luminosity (RLF) (Auriemma et al 1977) as well as the transition from Fanaroff -Riley type I to type II (Fanaroff & Riley, 1974). This limitation to weak radio powers does not necessarily imply that such radi

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Bera, Soumen, Tapan K. Sasmal, Dusmanta Patra, and Soumen Mondal. "“Winged” Radio Sources from the LOFAR Two-meter Sky Survey First Data Release (LoTSS DR1)." Astrophysical Journal Supplement Series 260, no. 1 (2022): 7. http://dx.doi.org/10.3847/1538-4365/ac5cc4.

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Abstract A small number of extragalactic radio sources disclose a pair of low-surface-brightness radio lobes, known as “wings,” aligned at a certain angle to the primary jets. Such exotic sources are known as “winged” radio sources. Here we report the new identification of a total of 26 “winged” radio sources from the LOFAR Two-meter Sky Survey First Data Release (LoTSS DR1). Out of the 26 “winged” sources, 14 are identified as X-shaped radio galaxies and the remaining 12 as Z-shaped radio galaxies. The available optical counterpart of each radio galaxy is cataloged along with its estimated re

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Kim, Won-Yeol, Soo-Ho Tae, and Dong-Hoan Seo. "Access-Point Centered Window-Based Radio-Map Generation Network." Sensors 21, no. 18 (2021): 6107. http://dx.doi.org/10.3390/s21186107.

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Fingerprinting is the term used to describe a common indoor radio-mapping positioning technology that tracks moving objects in real time. To use this, a substantial number of measurement processes and workflows are needed to generate a radio-map. Accordingly, to minimize costs and increase the usability of such radio-maps, this study proposes an access-point (AP)-centered window (APCW) radio-map generation network (RGN). The proposed technique extracts parts of a radio-map in the form of a window based on AP floor plan coordinates to shorten the training time while enhancing radio-map predicti

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36

Krause, Martin G. H., and Martin J. Hardcastle. "Can the Local Bubble explain the radio background?" Monthly Notices of the Royal Astronomical Society 502, no. 2 (2021): 2807–14. http://dx.doi.org/10.1093/mnras/stab131.

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ABSTRACT The ARCADE 2 balloon bolometer along with a number of other instruments have detected what appears to be a radio synchrotron background at frequencies below about 3 GHz. Neither extragalactic radio sources nor diffuse Galactic emission can currently account for this finding. We use the locally measured cosmic ray electron population, demodulated for effects of the Solar wind, and other observational constraints combined with a turbulent magnetic field model to predict the radio synchrotron emission for the Local Bubble. We find that the spectral index of the modelled radio emission is

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De Santana, Pedro Maia, Thiago A. Scher, Juliano Joao Bazzo, Alvaro A. M. de Medeiros, and Vicente A. de Sousa Jr. "RF-Based Machine Learning Solution for Indoor Person Detection." International Journal of Interdisciplinary Telecommunications and Networking 13, no. 2 (2021): 42–50. http://dx.doi.org/10.4018/ijitn.2021040104.

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Machine learning techniques applied to radio frequency (RF) signals are used for many applications in addition to data communication. In this paper, the authors propose a machine learning solution for classifying the number of people within an indoor ambient. The main idea is to identify a pattern of received signal characteristics according to the number of people. Experimental measurements are performed using a software-defined radio platform inside a laboratory. The data collected is post-processed by applying a feature mapping technique based on mean, standard deviation, and Shannon inform

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Hoffman, Joshua D., John D. Lee, Daniel V. McGehee, Mashala Macias, and Andrew W. Gellatly. "Visual Sampling of In-Vehicle Text Messages." Transportation Research Record: Journal of the Transportation Research Board 1937, no. 1 (2005): 22–30. http://dx.doi.org/10.1177/0361198105193700104.

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Emerging in-vehicle technology associated with radio data systems, satellite radio, navigation aids, and infotainment systems will expose drivers to an increasing amount of textual information. The visual demands of driving make it critically important to understand how characteristics of such information affect visual sampling of the roadway. This study used a medium-fidelity driving simulator to evaluate the effect of scroll control (manual or automatic), the number of lines displayed (one, two, or four), and scrolling strategy (line by line or page by page) on drivers’ visual sampling behav

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Liu, Renbin, Attahiru Sule Alfa, and Miaomiao Yu. "Optimal power consumption control of sensor node based on (N, D)-policy discrete-time queues." RAIRO - Operations Research 53, no. 3 (2019): 937–62. http://dx.doi.org/10.1051/ro/2017048.

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In this paper, we consider two types of power consumption control policies for the long lifetime of wireless sensor node based on the discrete-time Geo/G/1 queue. One is the max(N, D)-policy, which triggers transmission mode of radio server when the N and D policies are met simultaneously, and another is the min (N, D)-policy, which restarts transmission function of radio server when either of the N and D policies is first satisfied. Under two control policies, the steady-state queueing analysis of sensor node is mathematically carried out. The mean queueing measures of sensor node, such as th

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Lewis, Peter, and Caroline Mitchell. "The Radio Garden: Private pleasures and public benefits." Interactions: Studies in Communication & Culture 12, no. 1 (2021): 39–50. http://dx.doi.org/10.1386/iscc_00035_1.

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The launch in December 2016 of the Radio Garden, an output of the EU-funded Transnational Radio Encounters (TRE) project, attracted a social media storm and hundreds of millions of page views. Since then, the number of visits has not significantly decreased. It is the ability to access live radio streams from stations across the world that is Radio Garden’s attraction, something which, in the years since its launch, the two authors have repeatedly witnessed: people, young and old, are excited by this ‘TRE’. With a touch of the screen, Radio Garden offers an escape from the bubble of ‘likes’ to

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Simonetto, Cristoforo, Michael Mayinger, Thamer Ahmed, et al. "Longitudinal Atherosclerotic Changes After Radio(chemo)therapy of Hypopharyngeal Carcinoma." Radiation Oncology 15, no. 1 (2020): 102. https://doi.org/10.1186/s13014-020-01541-3.

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<strong>Background: </strong> Radiotherapy treatment of head and neck cancer affects local arteries and increases the risk of stroke. This study aimed at a closer characterization of this damage and its development in time with a longitudinal study set up. <strong>Methods: </strong> Male patients treated between 2011 and 2016 for hypopharyngeal carcinoma were identified from the in-house clinical data base. They were included into the study if besides the planning CT at least one additional CT image was available from follow-up (13 patients) or at least two MRI scans (16 patients of which 2 we

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Varga, Mihaly, Mihai Alin Badiu, and Vasile Bota. "Mean Mutual Information Based Adaptive Modulation and Coding Mechanism for Cooperative Relaying in Wireless Systems." Advanced Engineering Forum 8-9 (June 2013): 593–602. http://dx.doi.org/10.4028/www.scientific.net/aef.8-9.593.

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We propose a link adaptation algorithm for cooperative transmissions in an OFDMA-based wireless system. The link adaptation method selects the transmission type (cooperative or non-cooperative), the modulation orders and amount and type of redundancy required to ensure a target block error rate at each phase of the cooperative transmission. The above parameter-values are chosen so as to minimize the number of occupied time-frequency radio resources required to transmit the K-bit log data block. The algorithm employs a BLER performance prediction method based on mutual information. The proposed

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Kouris, S. S., P. A. Bradley, and P. Dominici. "<i>Letter to the Editor:</i> Solar-cycle variation of the daily <i>fo</i>F2 and M(3000)F2." Annales Geophysicae 16, no. 8 (1998): 1039–42. http://dx.doi.org/10.1007/s00585-998-1039-0.

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Abstract. Daily values of the ionospheric characteristics foF2 and M(3000)F2 for a given hour and month are correlated with the corresponding daily values of sunspot number using measured data collected at seven European locations. The significance of applying different-order polynomials is considered and the times are confirmed when the higher-order terms are important. Mean correlation coefficients for combined data sets over all hours, months and stations are determined, together with the standard errors of estimates. Comparisons are made with corresponding figures for monthly median values

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McWilliams, Thomas, Joonbum Lee, Bruce Mehler, and Bryan Reimer. "Revisiting Radio Tuning: A Secondary Analysis Comparing Glance Behavior Across Five Vehicles." Proceedings of the Human Factors and Ergonomics Society Annual Meeting 61, no. 1 (2017): 1924–28. http://dx.doi.org/10.1177/1541931213601961.

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Visual-manual demand placed on drivers through interactions with operational functions, embedded telematics, infotainment systems, and nomadic technologies has raised concerns associated with diverting attention from the roadway. This analysis draws on data from field studies of five different infotainment systems representing a range of screen placements and control characteristics that diverge in significant ways from the relatively standard car radio layout of previous generations. Participants performed a set of classic visual-manual radio tuning tasks under highway driving conditions. The

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Adeline, Nkwam-Uwaoma, Evaristus Jideofor Ugboma, Nkwocha Martin Chike, Eze Immaculate A., and Etumnu Emeka Williams. "Public Perception of Radio Programmes on Parental Sexual Abuse on Children: A Study of Residents of Owerri Metropolis." Asian Journal of Advanced Research and Reports 18, no. 8 (2024): 191–202. http://dx.doi.org/10.9734/ajarr/2024/v18i8721.

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Recently, media reports of parental sexual abuse have been alarming. Hence, this study examined the public perception of radio programmes on parental sexual abuse of children in Imo State metropolis. The study was anchored on agenda-setting theory. The study adopted the survey research design. From the population of 983,000 residents in Owerri metropolis, 400 were derived using the Taro Yamani formula. The multistage sampling technique was used. A questionnaire was used as the instrument of data collection. The percentage and mean analysis methods were used for the analysis. The findings revea

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Klyuev, Dmitriy S., Andrey N. Volobuev, Kaira A. Adyshirin-Zade, Tatyana A. Antipova, and Natalia N. Aleksandrova. "Influence of atmospheric turbulence on the spectral composition of the radio signal." Physics of Wave Processes and Radio Systems 27, no. 3 (2024): 110–16. http://dx.doi.org/10.18469/1810-3189.2024.27.3.110-116.

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Background. It is shown that it is necessary to study the effect of atmospheric turbulence on the spectral characteristics of a radio signal. Aim. The influence of atmospheric turbulence on the spectral fluctuations of the radio signal intensity and on the displacement of the spectral components of the radio signal has been studied. Methods. The research was carried out on the basis of an analysis of the relationship between two-wave and single-wave correlation ratios. Based on the solution of the differential equation for fluctuations of the eikonal amplitude of an electromagnetic wave and th

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Lawson, A. J., and M. J. L. Turner. "The X-ray Emission of Quasars as Observed by Ginga." Symposium - International Astronomical Union 159 (1994): 123–25. http://dx.doi.org/10.1017/s007418090017490x.

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We present preliminary results on a spectal analysis of quasars observed by the X-ray observatory Ginga. Simple power-law models with fixed Galactic absorbtion provide an adequate description of the spectra for most of the sources in the 2–18 keV band. A small number of sources show evidence for a feature at 6.4 keV (in the source rest frame) due to Fe line emission. Maximum likelihood and Spearman rank tests were used to investigate the relationship between radio loudness and X-ray spectral index in this class of object. These tests showed, respectively, that the mean X-ray spectral index of

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Cwalina, Krzysztof K., Piotr Rajchowski, Alicja Olejniczak, Olga Błaszkiewicz, and Robert Burczyk. "Channel State Estimation in LTE-Based Heterogenous Networks Using Deep Learning." Sensors 21, no. 22 (2021): 7716. http://dx.doi.org/10.3390/s21227716.

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Following the continuous development of the information technology, the concept of dense urban networks has evolved as well. The powerful tools, like machine learning, break new ground in smart network and interface design. In this paper the concept of using deep learning for estimating the radio channel parameters of the LTE (Long Term Evolution) radio interface is presented. It was proved that the deep learning approach provides a significant gain (almost 40%) with 10.7% compared to the linear model with the lowest RMSE (Root Mean Squared Error) 17.01%. The solution can be adopted as a part

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Schmidt, T., J. Wickert, S. Heise, et al. "Comparison of ECMWF analyses with GPS radio occultations from CHAMP." Annales Geophysicae 26, no. 11 (2008): 3225–34. http://dx.doi.org/10.5194/angeo-26-3225-2008.

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Abstract. A climatological validation of the 6-hourly operational ECMWF troposphere and lower stratosphere temperatures as well as geopotential heights between 1000 and 10 hPa is performed using the 2001–2007 (80 months from May 2001 to December 2007) CHAMP radio occultation data. Generally there is a good agreement between ECMWF and CHAMP temperatures averaged over 300–10 hPa for all years/seasons with global annual mean biases (standard deviations) less than 0.3 (1.7) K. Regional and temporal discrepancies occur within the polar vortex mainly on the Southern Hemisphere and the tropical tropo

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Gnedin, Yu N. "Chromospheres, activity and magnetic fields." Symposium - International Astronomical Union 189 (1997): 245–52. http://dx.doi.org/10.1017/s0074180900116754.

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This brief review presents the current state of observations of stellar activity effects including the fluxes of chromospheric emission lines: CaII H+K, MgII h+k, SiII 1812 Å multiplet, CIV, as well as radio and X-ray fluxes versus B-V colours and luminosity classes, rotation periods, Rossby number and especially versus the mean magnetic flux density 〈fB〉. Results of stellar magnetic field measurements are presented.

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