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Journal articles on the topic 'Surface types and Obudu'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

M., A. Abua, A. Essoka P., I. Uquetan U., and W. Ashua S. "Sediment Loss Responses to Rainfall on Different Surfaces in Obudu, Cross River State, Nigeria." Journal of Geography, Environment and Earth Science International 10, no. 4 (2017): 1–7. https://doi.org/10.9734/JGEESI/2017/22200.

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The amount of runoff generated relative to different surface types given an amount of rainfall is very important in hydrogeomorphological studies. This study is aimed at examining sediment yield responses to rainfall on different surfaces in Obudu, Cross River State, Nigeria. Data were collected on rainfall amount, intensity, duration and sediment loss from three run off plots on natural vegetation surface, mulched and bare surfaces. The data collected were analyzed using Pearson’s moment correlation and multiple regression statistical techniques. The results revealed that rainfall amount corr

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2

Efiong, Joel, Opaminola Nicholas Digha, and Obianuju Emmanuella Asouzu. "Spatial Analysis of Land Surface - Vegetation Relationship in Mountainous Areas of the Tropics Using Srtm-3 Dem." Journal of Geography and Geology 8, no. 2 (2016): 59. http://dx.doi.org/10.5539/jgg.v8n2p59.

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Digital elevation models (DEMs) have shown much potential for use in the extraction of land surface parameters and analysis of the relationship between land surface units and vegetation cover. However, there is lack of studies on the use of SRTM-3 DEM in vegetation studies of mountainous regions. This study is therefore an attempt to relate land surface parameters to vegetation cover in the Obudu mountain region using SRTM-3 DEM and Landsat data. Geomorphometric classification of the land surface was done using an unsupervised ISOCLUST algorithm while vegetation cover classification was done u

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3

Ekwueme, Barth N., and Alfred Kröner. "Single zircon ages of migmatitic gneisses and granulites in the Obudu Plateau: Timing of granulite-facies metamorphism in southeastern Nigeria." Journal of African Earth Sciences 44, no. 4-5 (2006): 459–69. http://dx.doi.org/10.1016/j.jafrearsci.2005.11.013.

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4

Odido, Mercy Ereji, and Martina Nnenna Iheme. "Utilization of Improved Cassava Production Technologies among Farmers in Obudu Local Government Area, Cross River State, Nigeria." International Journal of Research in Education and Sustainable Development 4, no. 6 (2024): 1–28. https://doi.org/10.5281/zenodo.11624959.

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<em>The study is on the </em><em>utilization </em><em>of improved cassava production technologies among </em><em>farmers in Obudu Local Government Area of Cross River State, Nigeria. The specific </em><em>objectives of the study were to; ascertain the socio-economic characteristics of the respondents, identify the types of improved cassava production technologies available to farmers in the area, determine the extent of utilization of improved cassava production technologies in the study area, the benefits derived from utilizing improved cassava production technologies and factors affecting th

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5

Lawrence AUgbe, Jane-Francis Nyong, and Ugbong Emmanuel Akomaye. "A comparative analysis of the efficacies of six selected herbicides for effective control of spear grass (Imperata cylindrical Linn) in cassava production in Obudu, Northern Cross River State." GSC Biological and Pharmaceutical Sciences 15, no. 3 (2021): 272–80. http://dx.doi.org/10.30574/gscbps.2021.15.3.0135.

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A two-year, (2015 and 2016) field trial was conducted in Obudu Local Government Area of Cross River State to compare the efficacies of six (6) selected herbicides in controlling spear grass (Imperata cylindrical Linn) in cassava farm. The main treatments were the three cassava varieties: TMS 30572, TMS 50395 and NR 8082, while the sub treatments were six herbicides: Primextra, Igrancombi Gold, and Paracot as pre-emergence, Touchdown Forte Hi Tech, Galex and Fusilade Forte as post-emergence herbicides. The result showed that cassava establishment did not differ significantly among the cassava v

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Lawrence, AUgbe, Nyong Jane-Francis, and Emmanuel Akomaye Ugbong. "A comparative analysis of the efficacies of six selected herbicides for effective control of spear grass (Imperata cylindrical Linn) in cassava production in Obudu, Northern Cross River State." GSC Biological and Pharmaceutical Sciences 15, no. 3 (2021): 272–80. https://doi.org/10.5281/zenodo.5061705.

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A two-year, (2015 and 2016) field trial was conducted in Obudu Local Government Area of Cross River State to compare the efficacies of six (6) selected herbicides in controlling spear grass (<em>Imperata cylindrical Linn</em>) in cassava farm. The main treatments were the three cassava varieties: TMS 30572, TMS 50395 and NR 8082, while the sub treatments were six herbicides: Primextra, Igrancombi Gold, and Paracot as pre-emergence, Touchdown Forte Hi Tech, Galex and Fusilade Forte as post-emergence herbicides. The result showed that cassava establishment did not differ significantly among the

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7

Burnham, Robert S., Robert S. McKinley, and Daniel D. Vincent. "Three Types of Skin-Surface Thermometers." American Journal of Physical Medicine & Rehabilitation 85, no. 7 (2006): 553–58. http://dx.doi.org/10.1097/01.phm.0000223232.32653.7f.

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8

Salem, Amna, and Cherif Mohsen. "Atomic Force Microscope Surface Roughness Analysis of Surface Treated Ceramics." Open Access Macedonian Journal of Medical Sciences 8, no. D (2020): 134–38. http://dx.doi.org/10.3889/oamjms.2020.4523.

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AIM: The purpose of this study was to evaluate the surface roughness of two types of ceramic after different surface treatments using an atomic force microscope (AFM). MATERIALS AND METHODS: One hundred sixty disks were fabricated of the two types of ceramic eighty disks of lithium disilicate (LD) (IPS e. max computer-aided design [CAD]) and eighty disks of hybrid ceramic (VITA Suprinity pc). Disks were subdivided into four groups according to the surface treatment (n = 20). Eighty disks of (IPS e. max CAD) were subdivided into LD I: control (no treatment), LD II: Sandblasting (Al2O3, 50

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9

Robinson, Harold C. "Types and properties of surface acoustic waves." Journal of the Acoustical Society of America 99, no. 4 (1996): 2479–500. http://dx.doi.org/10.1121/1.415567.

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10

SPEER, KEVIN G. "Conversion among North Atlantic surface water types." Tellus A 45, no. 1 (1993): 72–79. http://dx.doi.org/10.1034/j.1600-0870.1993.00006.x.

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11

Speer, Kevin G. "Conversion among North Atlantic surface water types." Tellus A: Dynamic Meteorology and Oceanography 45, no. 1 (1993): 72–79. http://dx.doi.org/10.3402/tellusa.v45i1.14858.

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12

Maurer, Thomas, Ludger Herrmann, and Karl Stahr. "Wind erosion characteristics of Sahelian surface types." Earth Surface Processes and Landforms 35, no. 12 (2010): 1386–401. http://dx.doi.org/10.1002/esp.1975.

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13

Keselman, Vladimir, Tatyana Igonina, Olga Kozlova, and Olga Paraskevopulo. "CONDITIONS OF PARABOLIC AND HYPERBOLIC TYPES OF NONPARAMETRIC SURFACE." Mathematical Physics and Computer Simulation 27, no. 3 (2024): 27–37. https://doi.org/10.15688/mpcm.jvolsu.2024.3.3.

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A nonparametric two-dimensional surface is considered, i.e. the graph of some smooth function 𝑓 = 𝑓(𝑥, 𝑦) defined over the entire plane. The surface type is defined in terms of the two-dimensional capacity of a compact set on the surface as follows. If the capacity of any non-degenerate continuum on the surface is zero, then the surface has a parabolic type, and if the capacity of any non-degenerate continuum on the surface is positive, then the surface has a hyperbolic type. The paper establishes integral conditions for the function 𝑓 defining the surface, under which the surface has one or a

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14

Leis, Marina L., Gabriela M. Madruga, and Matheus O. Costa. "The porcine corneal surface bacterial microbiome: A distinctive niche within the ocular surface." PLOS ONE 16, no. 2 (2021): e0247392. http://dx.doi.org/10.1371/journal.pone.0247392.

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Purpose The ocular surface microbiome has been described as paucibacterial. Until now, studies investigating the bacterial community associated with the ocular surface through high-throughput sequencing have focused on the conjunctiva. Conjunctival samples are thought to reflect and be representative of the microbiome residing on the ocular surface, including the cornea. Here, we hypothesized that the bacterial community associated with the corneal surface was different from those of the inferonasal and superotemporal conjunctival fornices, and from the tear film. Methods Both eyes from 15 hea

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15

Mishchenko, O., O. Solodovnik, and O. Oleshko. "Osseointegration of dental implants with various surface types." Bukovinian Medical Herald 24, no. 1 (93) (2020): 79–89. http://dx.doi.org/10.24061/2413-0737.xxiv.1.93.2020.11.

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16

Lim, Young-Kwon, Ming Cai, Eugenia Kalnay, and Liming Zhou. "Impact of Vegetation Types on Surface Temperature Change." Journal of Applied Meteorology and Climatology 47, no. 2 (2008): 411–24. http://dx.doi.org/10.1175/2007jamc1494.1.

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Abstract The impact of different surface vegetations on long-term surface temperature change is estimated by subtracting reanalysis trends in monthly surface temperature anomalies from observation trends over the last four decades. This is done using two reanalyses, namely, the 40-yr ECMWF (ERA-40) and NCEP–NCAR I (NNR), and two observation datasets, namely, Climatic Research Unit (CRU) and Global Historical Climate Network (GHCN). The basis of the observation minus reanalysis (OMR) approach is that the NNR reanalysis surface fields, and to a lesser extent the ERA-40, are insensitive to surfac

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17

Pongnarisorn, Nuchjaree J., Erica Gemmell, Albert E. S. Tan, Patrick J. Henry, Roderick I. Marshall, and Gregory J. Seymour. "Inflammation associated with implants with different surface types." Clinical Oral Implants Research 18, no. 1 (2007): 114–25. http://dx.doi.org/10.1111/j.1600-0501.2006.01304.x.

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18

Kraus, Helmut, and Adnan Alkhalaf. "Characteristic surface energy balances for different climate types." International Journal of Climatology 15, no. 3 (1995): 275–84. http://dx.doi.org/10.1002/joc.3370150304.

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19

Kerr, W., S. G. Pierce, and P. Rowe. "Investigation of synthetic aperture methods in ultrasound surface imaging using elementary surface types." Ultrasonics 72 (December 2016): 165–76. http://dx.doi.org/10.1016/j.ultras.2016.08.007.

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20

Jäkel, Evelyn, Sebastian Becker, Tim R. Sperzel, et al. "Observations and modeling of areal surface albedo and surface types in the Arctic." Cryosphere 18, no. 3 (2024): 1185–205. http://dx.doi.org/10.5194/tc-18-1185-2024.

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Abstract. An accurate representation of the annual evolution of surface albedo of the Arctic Ocean, especially during the melting period, is crucial to obtain reliable climate model predictions in the Arctic. Therefore, the output of the surface albedo scheme of a coupled regional climate model (HIRHAM–NAOSIM) was evaluated against airborne and ground-based measurements. The observations were conducted during five aircraft campaigns in the European Arctic at different times of the year between 2017 and 2022; one of them was part of the Multidisciplinary drifting Observatory for the Study of Ar

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21

Schlanger, Sarah H., and Janet D. Orcutt. "Site Surface Characteristics and Functional Inferences." American Antiquity 51, no. 2 (1986): 296–312. http://dx.doi.org/10.2307/279941.

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With the rise in importance of the archaeological survey as a major data-recovery tool has come greater concern over methods for making inferences about site subsurface characteristics from surface materials. One growing area of concern is the identification of site function using surface features and artifact assemblages. Here we examine the relations among architectural site types (defined using surface features), modeled functional site types, and surface artifact assemblage characteristics. Analysis proceeded in three stages, each one built on the previous stage. In the first stage we used

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22

Yang, Liangyan, and Lei Shi. "Effects of Different Land Use Types on Surface Temperature in the Northwest Arid Zone." International Journal of Natural Resources and Environmental Studies 2, no. 2 (2024): 134–37. http://dx.doi.org/10.62051/ijnres.v2n2.15.

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This study analyzed the spatial and temporal characteristics of surface temperature in Uttarakhand Banner, and explored the correlation between land use types and surface temperature. The results show that the surface temperature of Urumqi Banner is greatly influenced by the change of land use types, and the difference of surface temperature between different land use types is obvious; the spatial and temporal trend of surface temperature in Urumqi Banner is different from the trend of gradual warming of the global climate change, which is mainly due to the change of the land use types by huma

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23

Mária, Čarnogurská, and Gallik Róbert. "Special Types of Heat Exchangers." International Journal of Engineering Research & Science 6, no. 6 (2020): 12–15. https://doi.org/10.5281/zenodo.3933139.

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<strong><em>Abstract</em></strong><strong>—</strong> <em>The article describes the results of experimental research of a new type of heat exchangers in which the heat transfer surface consists of smooth polypropylene fibres with the outer fibre diameter of 0.5 mm and the total heat transfer surface area of 0.14 m<sup>2</sup>. The research output is the information on the value of the heat transfer coefficient, exchanger heat capacity and pressure loss. This type of heat exchangers is contemplated for applications in areas where high chemical resistance of the equipment is requi

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24

Bhupal, Mohan, and Kaoru Ono. "Symplectic fillings of links of quotient surface singularities." Nagoya Mathematical Journal 207 (September 2012): 1–45. http://dx.doi.org/10.1017/s0027763000022297.

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AbstractWe study symplectic deformation types of minimal symplectic fillings of links of quotient surface singularities. In particular, there are only finitely many symplectic deformation types for each quotient surface singularity.

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25

Clinton, Barton D., and James M. Vose. "Differences in Surface Water Quality Draining Four Road Surface Types in the Southern Appalachians." Southern Journal of Applied Forestry 27, no. 2 (2003): 100–106. http://dx.doi.org/10.1093/sjaf/27.2.100.

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Abstract Improved and unimproved roads can be the primary source of stream sediment in forested watersheds. We assessed differences in production of total suspended solids (TSS; ppm) from four road surface conditions in a Southern Appalachian watershed: (1) a 2-yr-old paved surface (P), (2) an improved gravel surface with controlled drainage and routine maintenance (RG), (3) an improved gravel surface with erosion and sediment control structures installed and routine maintenance (IG), and (4) an unimproved poorly maintained gravel surface (UG). Variation was high among and within road surface

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26

Ke, Y., L. R. Leung, M. Huang, and H. Li. "Enhancing the representation of subgrid land surface characteristics in land surface models." Geoscientific Model Development Discussions 6, no. 1 (2013): 2177–212. http://dx.doi.org/10.5194/gmdd-6-2177-2013.

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Abstract. Land surface heterogeneity has long been recognized as important to represent in the land surface models. In most existing land surface models, the spatial variability of surface cover is represented as subgrid composition of multiple surface cover types. In this study, we developed a new subgrid classification method (SGC) that accounts for the topographic variability of the vegetation cover. Each model grid cell was represented with a number of elevation classes and each elevation class was further described by a number of vegetation types. The numbers of elevation classes and vege

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27

Hahn, Ute, and Dietrich Stoyan. "Unbiased stereological estimation of the surface area of gradient surface processes." Advances in Applied Probability 30, no. 4 (1998): 904–20. http://dx.doi.org/10.1239/aap/1035228199.

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An unbiased stereological estimator for surface area density is derived for gradient surface processes which form a particular class of non-stationary spatial surface processes. Vertical planar sections are used for the estimation. The variance of the estimator is studied and found to be infinite for certain types of surface processes. A modification of the estimator is presented which exhibits finite variance.

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Hahn, Ute, and Dietrich Stoyan. "Unbiased stereological estimation of the surface area of gradient surface processes." Advances in Applied Probability 30, no. 04 (1998): 904–20. http://dx.doi.org/10.1017/s0001867800008715.

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An unbiased stereological estimator for surface area density is derived for gradient surface processes which form a particular class of non-stationary spatial surface processes. Vertical planar sections are used for the estimation. The variance of the estimator is studied and found to be infinite for certain types of surface processes. A modification of the estimator is presented which exhibits finite variance.

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29

England, Matt W., Tomoya Sato, Makoto Yagihashi, Atsushi Hozumi, Stanislav N. Gorb, and Elena V. Gorb. "Surface roughness rather than surface chemistry essentially affects insect adhesion." Beilstein Journal of Nanotechnology 7 (October 18, 2016): 1471–79. http://dx.doi.org/10.3762/bjnano.7.139.

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The attachment ability of ladybird beetles Coccinella septempunctata was systematically investigated on eight types of surface, each with different chemical and topographical properties. The results of traction force tests clearly demonstrated that chemical surface properties, such as static/dynamic de-wettability of water and oil caused by specific chemical compositions, had no significant effect on the attachment of the beetles. Surface roughness was found to be the dominant factor, strongly affecting the attachment ability of the beetles.

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30

Ke, Y., L. R. Leung, M. Huang, and H. Li. "Enhancing the representation of subgrid land surface characteristics in land surface models." Geoscientific Model Development 6, no. 5 (2013): 1609–22. http://dx.doi.org/10.5194/gmd-6-1609-2013.

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Abstract. Land surface heterogeneity has long been recognized as important to represent in the land surface models. In most existing land surface models, the spatial variability of surface cover is represented as subgrid composition of multiple surface cover types, although subgrid topography also has major controls on surface processes. In this study, we developed a new subgrid classification method (SGC) that accounts for variability of both topography and vegetation cover. Each model grid cell was represented with a variable number of elevation classes and each elevation class was further d

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31

Zulkarnain. "STEM FLOW ON SOME TYPES OF TREES." GPH-International Journal of Agriculture and Research 05, no. 09 (2022): 01–06. https://doi.org/10.5281/zenodo.7049682.

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Excessive surface runoff can cause flooding and soil erosion. The existence of a vegetation canopy that is able to intercept rainwater at least can reduce surface runoff. Stem flow is rainwater that falls on the surface of the leaves, branches and stems, then flows through the stems to the soil surface. The size of the stem flow is strongly influenced by the structure of the trunk and the roughness of the bark of the tree. The research was carried out for 2 months in the Mixed Garden, BukuanUrban Village, Palaransub District, Samarinda City. The research activities carried out were: the prepar

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32

Ibrahim, I., A. Abu Samah, R. Fauzi, and N. M. Noor. "THE LAND SURFACE TEMPERATURE IMPACT TO LAND COVER TYPES." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B3 (June 10, 2016): 871–76. http://dx.doi.org/10.5194/isprs-archives-xli-b3-871-2016.

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Land cover type is an important signature that is usually used to understand the interaction between the ground surfaces with the local temperature. Various land cover types such as high density built up areas, vegetation, bare land and water bodies are areas where heat signature are measured using remote sensing image. The aim of this study is to analyse the impact of land surface temperature on land cover types. The objectives are 1) to analyse the mean temperature for each land cover types and 2) to analyse the relationship of temperature variation within land cover types: built up area, gr

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33

Sárközi, Réka, Péter Iványi, and Attila Béla Széll. "Classification of parametric design techniques — Types of surface patterns." Pollack Periodica 12, no. 2 (2017): 173–80. http://dx.doi.org/10.1556/606.2017.12.2.15.

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34

Xu, Wei Hua, and Tong Yi Zhang. "Surface Effect for Different Types of Materials in Nanoindentation." Key Engineering Materials 261-263 (April 2004): 1587–92. http://dx.doi.org/10.4028/www.scientific.net/kem.261-263.1587.

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This paper studies surface effects on the depth-dependent hardness and proposes a novel method to estimate the apparent surface stress from nanoindentation tests. Good agreement is found between the theoretical predictions and experimental data of the depth-dependent hardness, thereby indicating that the apparent surface stress plays an important role in the depth-dependent hardness for various types of materials, such as metals, ceramics, and polymers.

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35

Ibrahim, I., A. Abu Samah, R. Fauzi, and N. M. Noor. "THE LAND SURFACE TEMPERATURE IMPACT TO LAND COVER TYPES." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B3 (June 10, 2016): 871–76. http://dx.doi.org/10.5194/isprsarchives-xli-b3-871-2016.

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Land cover type is an important signature that is usually used to understand the interaction between the ground surfaces with the local temperature. Various land cover types such as high density built up areas, vegetation, bare land and water bodies are areas where heat signature are measured using remote sensing image. The aim of this study is to analyse the impact of land surface temperature on land cover types. The objectives are 1) to analyse the mean temperature for each land cover types and 2) to analyse the relationship of temperature variation within land cover types: built up area, gr

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36

Prigent, Catherine, William B. Rossow, Elaine Matthews, and Béatrice Marticorena. "Microwave radiometric signatures of different surface types in deserts." Journal of Geophysical Research: Atmospheres 104, no. D10 (1999): 12147–58. http://dx.doi.org/10.1029/1999jd900153.

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37

Zhang, C., A. C. M. Sousa, and J. E. S. Venart. "Numerical Simulation of Different Types of Steam Surface Condensers." Journal of Energy Resources Technology 113, no. 2 (1991): 63–70. http://dx.doi.org/10.1115/1.2905788.

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A numerical procedure is developed to simulate the fluid flow and heat transfer processes in the shell-side of steam surface condensers. The governing equations are solved in primitive variable form using a semi-implicit consistent control-volume formulation in which a segregated pressure correction linked algorithm is employed. The procedure is applied to three different types of surface condenser. The numerical predictions are critically assessed by comparison to available experimental data for condensers, and in general, the solutions are in good agreement with the experimental data.

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38

Ovchinnikova, M. Ya. "Types of Fermi surface segments of cuprate stripe phases." Russian Journal of Physical Chemistry B 3, no. 2 (2009): 273–79. http://dx.doi.org/10.1134/s199079310902016x.

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39

Simon, J. M., I. Arias, G. González-Talaván, and A. Blesa. "Pulse crest surface curvature in some types of compressor." Journal of Modern Optics 43, no. 6 (1996): 1211–17. http://dx.doi.org/10.1080/09500349608232798.

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40

Hobson, R. S., J. F. McCabe, and S. D. Hogg. "Bond strength to surface enamel for different tooth types." Dental Materials 17, no. 2 (2001): 184–89. http://dx.doi.org/10.1016/s0109-5641(00)00068-3.

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41

Lo, Lun-Jou, Fen-Hwa Wong, Yu-Ray Chen, Wen-Yuan Lin, and Ellen Wen-Ching Ko. "Palatal Surface Area Measurement: Comparisons Among Different Cleft Types." Annals of Plastic Surgery 50, no. 1 (2003): 18–24. http://dx.doi.org/10.1097/00000637-200301000-00004.

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42

Luo, Xihui, Jiasheng Ai, Jinhai He, and Jigang Luo. "Evidence for different types of sites on alumina surface." Reaction Kinetics & Catalysis Letters 43, no. 1 (1991): 55–61. http://dx.doi.org/10.1007/bf02075412.

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43

Hall, Graham. "Wave Surface Symmetry and Petrov Types in General Relativity." Symmetry 16, no. 2 (2024): 230. http://dx.doi.org/10.3390/sym16020230.

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This paper presents a brief study of (2-dimensional, spacelike) wave surfaces to a null direction l on a space-time (M,g) and studies how certain imposed symmetries on the set of such wave surfaces can be used to describe other geometrical features of l and (M,g). It is mainly a review of known material but contains some novelties. For example, the brief discussion of the nature of wave surfaces (when viewed geometrically as wave fronts to a null ray direction) in Wave Surfaces Section is new in the sense that although it appeared in the author’s work by the present author, it has not, to the

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44

Keough, K. M. W., E. Farrell, M. Cox, G. Harrell, and H. W. Taeusch Jr. "Physical, chemical, and physiological characteristics of isolates of pulmonary surfactant from adult rabbits." Canadian Journal of Physiology and Pharmacology 63, no. 9 (1985): 1043–51. http://dx.doi.org/10.1139/y85-171.

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Physical and chemical characteristics of two types of preparations of surface active material from adult rabbits were determined. A procedure using multiple centrifugations produced a surface active material (type A) which had 6.6% by weight protein and a phosphorus/protein ratio of 13.1 nmol P/μg protein. A simpler protocol involving two centrifugations yielded a surface active material (type B) with more protein (10.8%) and a lower phosphorus/protein ratio (8.4 nmol/μg). Lipid compositions of both types were similar with phosphatidylcholine being the major phospholipid (80%) and palmitate th

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45

Dremliuga, N., and O. Futorna. "The leaf surface strucure of the species from the section Rapunculus L. (Fourr.) Boiss. of the genus Campanula L. in the flora of Ukraine." Modern Phytomorphology 1 (April 1, 2012): 103–6. https://doi.org/10.5281/zenodo.162750.

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For the first time, the ultrastructure of the leaf surface of the species from the section Rapunculus L. (Fourr.) Boiss. of the genus Campanula L. in the flora of Ukraine was studied by SEM. Common characters of the leaf surface of the studied species (amphistomatic type of leaves; regularly spaced non immersed anomocytic stomata; well developed cuticle; pubescence, formed by long sickle or short aculeiform hairs; type and location of wax scabs and/or blades deposits; general type of surface structure) have been revealed. Some essential characters were established as diagnostic for sections (t

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Dabbak, Sameh, Hazlee Illias, Ang Bee Chin, and Mohsin Ali Tunio. "Surface Discharge Characteristics on HDPE, LDPE and PP." Applied Mechanics and Materials 785 (August 2015): 383–87. http://dx.doi.org/10.4028/www.scientific.net/amm.785.383.

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The degradation of polymer insulation is affected by many factors. One of the main factors is surface discharge. In this work, the characteristics of surface discharge on different types of polymer insulation material under different types of electrode shapes were studied. The insulation materials used were high density polyethylene (HDPE), low density polyethylene (LDPE) and polypropylene (PP). Different types of electrode shape used were sharp, flat and sphere electrodes. From the experiments that have been performed, surface discharge characteristics were found to be influenced by the type

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Khaled, AbdulRahim Assaad. "Thermal performance of six different types of wavy-fins." International Journal of Numerical Methods for Heat & Fluid Flow 25, no. 4 (2015): 892–911. http://dx.doi.org/10.1108/hff-06-2014-0174.

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Purpose – Heat transfer inside wavy fins is analyzed in this work. The paper aim to discuss this issue. Design/methodology/approach – Six different types of wavy fins are considered. The fin equation for each fin type is solved using a high accurate finite difference method. Excellent agreement is obtained between the numerical solution under zero wave amplitude and the exact solution of the plain fin. Findings – The following wavy fin types and conditions are found to produce larger heat transfer rate and its volumetric value than those for the plain fin and other wavy fins: short fins with p

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Brentel, Aline Scalone, Luana Marotta Reis de Vasconcellos, Marize Varella Oliveira, et al. "Histomorphometric analysis of pure titanium implants with porous surface versus rough surface." Journal of Applied Oral Science 14, no. 3 (2006): 213–18. http://dx.doi.org/10.1590/s1678-77572006000300013.

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The purpose of this study was to analyze the bone repair around commercially pure titanium implants with rough and porous surface, fabricated using powder metallurgy technique, after their insertion in tibiae of rabbits. Seven male rabbits were used. Each animal received 3 porous-surface implants in the left tibia and 3 rough-surface implants in the right tibia. The rabbits were sacrificed 4 weeks after surgery and fragments of the tibiae containing the implants were submitted to histological and histomorphometric analyses to evaluate new bone formation at the implant-bone interface. Means (%)

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Shahroudi, Narges, and William Rossow. "Using land surface microwave emissivities to isolate the signature of snow on different surface types." Remote Sensing of Environment 152 (September 2014): 638–53. http://dx.doi.org/10.1016/j.rse.2014.07.008.

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Krejsová, Jitka, Magdaléna Doleželová, and Alena Vimmrová. "Evaluation of Fine Aggregate Surface and Fracture Surface by Confocal Microscope." Key Engineering Materials 760 (January 2018): 245–50. http://dx.doi.org/10.4028/www.scientific.net/kem.760.245.

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The gypsum mortars with different types of aggregate were studied. The surface roughness of fine aggregates and the fracture surface roughness were evaluated by a confocal laser scanning microscopy. Four gypsum mortars and one gypsum paste were tested. The results from the confocal laser scanning microscopy (CLSM) are compared with the pictures of grain surface taken by a scanning electron microscopy (SEM) and both methods seem to be appropriate for surface evaluation. The influence of the surface aggregate roughness on some gypsum mortar properties is demonstrated.

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