Sevilleta PowerPoint PPT Presentations

All Time
Show:
Recommended
Sort by:
Sevilleta LTER AboveGround Net Primary Production PowerPoint PPT Presentation
Sevilleta LTER AboveGround Net Primary Production - Quadrat sampling design was overlain on rodent webs to aid direct correlations ... NPP quadrat sampling design is efficient and low impact ...
Quadrat sampling design was overlain on rodent webs to aid direct correlations ... NPP quadrat sampling design is efficient and low impact ...
| PowerPoint PPT presentation | free to view
Water, Energy, and Carbon Cycling in the Sevilleta PowerPoint PPT Presentation
Water, Energy, and Carbon Cycling in the Sevilleta - ... and Technology Center (STC) of the National Science Foundation (NSF) Assistance with field work related to this study: John Boulanger, Jim Elliott, Doug McGhee ...
... and Technology Center (STC) of the National Science Foundation (NSF) Assistance with field work related to this study: John Boulanger, Jim Elliott, Doug McGhee ...
| PowerPoint PPT presentation | free to view
Andrew J' Rominger REU Intern, Sevilleta LTER 2006 Mentors: Scott L' Collins and Tom E' Miller PowerPoint PPT Presentation
Andrew J' Rominger REU Intern, Sevilleta LTER 2006 Mentors: Scott L' Collins and Tom E' Miller - Andrew J' Rominger REU Intern, Sevilleta LTER 2006 Mentors: Scott L' Collins and Tom E' Miller
Andrew J' Rominger REU Intern, Sevilleta LTER 2006 Mentors: Scott L' Collins and Tom E' Miller
| PowerPoint PPT presentation | free to view
Correlation Analyses of Rodents, Precipitation, and NDVI from Six Localities on the Sevilleta Nation PowerPoint PPT Presentation
Correlation Analyses of Rodents, Precipitation, and NDVI from Six Localities on the Sevilleta Nation - Correlation Analyses of Rodents, Precipitation, and NDVI from Six Localities on the Sevilleta Nation
Correlation Analyses of Rodents, Precipitation, and NDVI from Six Localities on the Sevilleta Nation
| PowerPoint PPT presentation | free to view
Quality Assurance PowerPoint PPT Presentation
Quality Assurance - Quality Assurance & Quality Control Kristin Vanderbilt, Ph.D. Sevilleta LTER
Quality Assurance & Quality Control Kristin Vanderbilt, Ph.D. Sevilleta LTER
| PowerPoint PPT presentation | free to download
Microbial Communities PowerPoint PPT Presentation
Microbial Communities - Microbial Communities & Feeding Specialization of Insects at The Sevilleta LTER Dan Colman Focal Organism Epicauta longicollis Member of Meloidae family 18-25 mm ...
Microbial Communities & Feeding Specialization of Insects at The Sevilleta LTER Dan Colman Focal Organism Epicauta longicollis Member of Meloidae family 18-25 mm ...
| PowerPoint PPT presentation | free to view
ohkay owingeh. santo domingo. badger. diversion. alameda. r PowerPoint PPT Presentation
ohkay owingeh. santo domingo. badger. diversion. alameda. r - Ohkay Owingeh. Santo Domingo. Badger. Diversion. Alameda. RGNC. Rt. 66. NHCC. Biopark. Reynolds forest. Reynolds cleared. Sevilleta. Lemitar. Santa Ana. Los Lunas ...
Ohkay Owingeh. Santo Domingo. Badger. Diversion. Alameda. RGNC. Rt. 66. NHCC. Biopark. Reynolds forest. Reynolds cleared. Sevilleta. Lemitar. Santa Ana. Los Lunas ...
| PowerPoint PPT presentation | free to view
The effect of colony size on foraging activity in Pogonomyrmex PowerPoint PPT Presentation
The effect of colony size on foraging activity in Pogonomyrmex - Most organisms show a nonlinear relationship between body size and ... Kris Marjon. Sevilleta LTER 'The Ant Course' & Southwest Research Station. EPA STAR ...
Most organisms show a nonlinear relationship between body size and ... Kris Marjon. Sevilleta LTER 'The Ant Course' & Southwest Research Station. EPA STAR ...
| PowerPoint PPT presentation | free to view
The Mexican participation in this international endeavor is crucial for the following reasons: PowerPoint PPT Presentation
The Mexican participation in this international endeavor is crucial for the following reasons: - ... LTER between Sevilleta (UNM), La Jornada del Muerto (NMSU) and Mapim ... la solidez conceptual y metodol gica en el o las reas tem ticas cubiertas, ...
... LTER between Sevilleta (UNM), La Jornada del Muerto (NMSU) and Mapim ... la solidez conceptual y metodol gica en el o las reas tem ticas cubiertas, ...
| PowerPoint PPT presentation | free to view
Microbial Communities PowerPoint PPT Presentation
Microbial Communities - Microbial Communities & Feeding Specialization of Insects at The Sevilleta LTER. Dan Colman ... Cibolacris parviceps (cream grasshopper) 20 32 mm in length ...
Microbial Communities & Feeding Specialization of Insects at The Sevilleta LTER. Dan Colman ... Cibolacris parviceps (cream grasshopper) 20 32 mm in length ...
| PowerPoint PPT presentation | free to view
Chemistry of Wells PowerPoint PPT Presentation
Chemistry of Wells - Chemistry of Wells
Chemistry of Wells
| PowerPoint PPT presentation | free to view
Automated Minirhizotron and Arrayed Soil Sensors AMARSS PowerPoint PPT Presentation
Automated Minirhizotron and Arrayed Soil Sensors AMARSS - Automated Minirhizotron and Arrayed Soil Sensors AMARSS
Automated Minirhizotron and Arrayed Soil Sensors AMARSS
| PowerPoint PPT presentation | free to view
Chihuahuan Desert Lizard Abundance in Gunnisons Prairie Dog Habitat: Do Lizards Prefer Prairie Dog C PowerPoint PPT Presentation
Chihuahuan Desert Lizard Abundance in Gunnisons Prairie Dog Habitat: Do Lizards Prefer Prairie Dog C - Chihuahuan Desert Lizard Abundance in Gunnisons Prairie Dog Habitat: Do Lizards Prefer Prairie Dog C
Chihuahuan Desert Lizard Abundance in Gunnisons Prairie Dog Habitat: Do Lizards Prefer Prairie Dog C
| PowerPoint PPT presentation | free to view
Landscape-soil interactions in the Chihuahuan desert PowerPoint PPT Presentation
Landscape-soil interactions in the Chihuahuan desert - ... interactions in the Chihuahuan desert. Brian Murtaugh. Meredith Albright ... Plant regulation of soil nutrient distribution in the northern Chihuahuan Desert. ...
... interactions in the Chihuahuan desert. Brian Murtaugh. Meredith Albright ... Plant regulation of soil nutrient distribution in the northern Chihuahuan Desert. ...
| PowerPoint PPT presentation | free to download
Spatiotemporal Drought Patterns from Normalized Difference Vegetation Index NDVI PowerPoint PPT Presentation
Spatiotemporal Drought Patterns from Normalized Difference Vegetation Index NDVI - Phenology. Site Productivity. Succession. Disturbance (fire, disease, grazing, harvest) ... drought effects, after controlling for phenology and disturbance. ...
Phenology. Site Productivity. Succession. Disturbance (fire, disease, grazing, harvest) ... drought effects, after controlling for phenology and disturbance. ...
| PowerPoint PPT presentation | free to view
The effect of arthropods on Dipodomys spectabilis food stores and storing behavior PowerPoint PPT Presentation
The effect of arthropods on Dipodomys spectabilis food stores and storing behavior - Are distributed in Southwestern U.S and Mexico. Ecosystem engineers ... Horizontally placed stacks containing seeds would imbibe water. Behavioral Hypothesis ...
Are distributed in Southwestern U.S and Mexico. Ecosystem engineers ... Horizontally placed stacks containing seeds would imbibe water. Behavioral Hypothesis ...
| PowerPoint PPT presentation | free to view
SEV Hydrocarbon Emissions, Absorption Spectra, and Future Work PowerPoint PPT Presentation
SEV Hydrocarbon Emissions, Absorption Spectra, and Future Work - SEV Hydrocarbon Emissions, Absorption Spectra, and Future Work
SEV Hydrocarbon Emissions, Absorption Spectra, and Future Work
| PowerPoint PPT presentation | free to view
Creating EML using XMLSpy PowerPoint PPT Presentation
Creating EML using XMLSpy - knb.ecoinformatics.org. Creating EML using XMLSpy. Second ... Each core site contains five rodent trapping webs. Each web... /para /section /description ...
knb.ecoinformatics.org. Creating EML using XMLSpy. Second ... Each core site contains five rodent trapping webs. Each web... /para /section /description ...
| PowerPoint PPT presentation | free to view
2003 NSF REU PowerPoint PPT Presentation
2003 NSF REU - 2003 NSF REU
2003 NSF REU
| PowerPoint PPT presentation | free to download
Bosque Ecosystem Monitoring Program: Groundwater, surface water, and vegetation PowerPoint PPT Presentation
Bosque Ecosystem Monitoring Program: Groundwater, surface water, and vegetation - Bosque Ecosystem Monitoring Program: Groundwater, surface water, and vegetation
Bosque Ecosystem Monitoring Program: Groundwater, surface water, and vegetation
| PowerPoint PPT presentation | free to view
Effects of aspect and elevation on the distribution of Pinyon Pine and Juniper trees, along with ind PowerPoint PPT Presentation
Effects of aspect and elevation on the distribution of Pinyon Pine and Juniper trees, along with ind - Effects of aspect and elevation on the distribution of Pinyon Pine and Juniper trees, along with ind
Effects of aspect and elevation on the distribution of Pinyon Pine and Juniper trees, along with ind
| PowerPoint PPT presentation | free to view
Seasonal Fire Effects on Seed Banks in a Semiarid Grassland PowerPoint PPT Presentation
Seasonal Fire Effects on Seed Banks in a Semiarid Grassland - Seasonal Fire Effects on Seed Banks in a Semiarid Grassland
Seasonal Fire Effects on Seed Banks in a Semiarid Grassland
| PowerPoint PPT presentation | free to view
Sensor Network Research and Applications PowerPoint PPT Presentation
Sensor Network Research and Applications - Sensor Network Research and Applications Venkatesh Subramaniam Viswanath
Sensor Network Research and Applications Venkatesh Subramaniam Viswanath
| PowerPoint PPT presentation | free to view
32Si: A New Method for Estimating Semiarid Vadose Zone Recharge PowerPoint PPT Presentation
32Si: A New Method for Estimating Semiarid Vadose Zone Recharge - Sustainability of semiArid Hydrology and ... How does this project fit into SAHRA? THRUST AREAS. Spatial and Temporal Properties of Hydrologic Variables ...
Sustainability of semiArid Hydrology and ... How does this project fit into SAHRA? THRUST AREAS. Spatial and Temporal Properties of Hydrologic Variables ...
| PowerPoint PPT presentation | free to view
The effects of herbivores on seed banks in a grassland and shrubland PowerPoint PPT Presentation
The effects of herbivores on seed banks in a grassland and shrubland - Do various types of herbivory affect the species composition of seed ... Joy Avritt Amanda Gonzales. Nirvana Barker Shawn Madden. Tim Lowrey Jeremy Nighbert ...
Do various types of herbivory affect the species composition of seed ... Joy Avritt Amanda Gonzales. Nirvana Barker Shawn Madden. Tim Lowrey Jeremy Nighbert ...
| PowerPoint PPT presentation | free to view
Hydraulic characteristics of irrigated Pinus edulis and Juniperus monosperma in response to pulse pr PowerPoint PPT Presentation
Hydraulic characteristics of irrigated Pinus edulis and Juniperus monosperma in response to pulse pr - Hydraulic characteristics of irrigated Pinus edulis and Juniperus monosperma in response to pulse pr
Hydraulic characteristics of irrigated Pinus edulis and Juniperus monosperma in response to pulse pr
| PowerPoint PPT presentation | free to view
The effect of colony size on energy acquisition rates in Pogonomyrmex PowerPoint PPT Presentation
The effect of colony size on energy acquisition rates in Pogonomyrmex - Forager density in large Pogo colonies is twice that in small colonies ... Does forager density increase when seed density increases? ...
Forager density in large Pogo colonies is twice that in small colonies ... Does forager density increase when seed density increases? ...
| PowerPoint PPT presentation | free to view
Quality Assurance PowerPoint PPT Presentation
Quality Assurance - Graphics and Statistics. Outlier detection. Archiving data ... Attempt to determine if contamination is responsible and, if so, flag the contaminated value. ...
Graphics and Statistics. Outlier detection. Archiving data ... Attempt to determine if contamination is responsible and, if so, flag the contaminated value. ...
| PowerPoint PPT presentation | free to view
Quantifying Biome specific relationships and Monsoon Event responses PowerPoint PPT Presentation
Quantifying Biome specific relationships and Monsoon Event responses - Using LAI , NDVI, PRI, and net ecosystem exchange in desert grassland and ... Quantified % covers with quadrat for each (understanding of the make-up of each ...
Using LAI , NDVI, PRI, and net ecosystem exchange in desert grassland and ... Quantified % covers with quadrat for each (understanding of the make-up of each ...
| PowerPoint PPT presentation | free to view
Quality Assurance PowerPoint PPT Presentation
Quality Assurance - Quality Assurance & Quality Control References Primary References Michener and Brunt (2000) Ecological Data: Design, Management and Processing.
Quality Assurance & Quality Control References Primary References Michener and Brunt (2000) Ecological Data: Design, Management and Processing.
| PowerPoint PPT presentation | free to download
The Ecology and Evolutionary History of an Emergent Disease: Hantavirus Pulmonary Syndrome PowerPoint PPT Presentation
The Ecology and Evolutionary History of an Emergent Disease: Hantavirus Pulmonary Syndrome - The Ecology and Evolutionary History of an Emergent Disease: Hantavirus Pulmonary Syndrome
The Ecology and Evolutionary History of an Emergent Disease: Hantavirus Pulmonary Syndrome
| PowerPoint PPT presentation | free to view
Quality Assurance PowerPoint PPT Presentation
Quality Assurance - Quality Assurance & Quality Control
Quality Assurance & Quality Control
| PowerPoint PPT presentation | free to view
Ecotonal blue and black grama: ecophysiological responses to precipitation changes PowerPoint PPT Presentation
Ecotonal blue and black grama: ecophysiological responses to precipitation changes - Jim Gosz, Bob Parmenter, Cliff Dahm, Bruce Milne, Carl White, Deb Peters, Les ... Greg Shore, John Dewitt, Luis Guzman, Charles Curtin, Tamara Hochstrasser, Ray ...
Jim Gosz, Bob Parmenter, Cliff Dahm, Bruce Milne, Carl White, Deb Peters, Les ... Greg Shore, John Dewitt, Luis Guzman, Charles Curtin, Tamara Hochstrasser, Ray ...
| PowerPoint PPT presentation | free to view
Investigating the thermal ecology of the desert box turtle PowerPoint PPT Presentation
Investigating the thermal ecology of the desert box turtle - Investigating the thermal ecology of the desert box turtle
Investigating the thermal ecology of the desert box turtle
| PowerPoint PPT presentation | free to view
Assessing the response of grassland, shrubland and a mixed grassshrub ecotone to precipitation varia PowerPoint PPT Presentation
Assessing the response of grassland, shrubland and a mixed grassshrub ecotone to precipitation varia - Assessing the response of grassland, shrubland and a mixed grassshrub ecotone to precipitation varia
Assessing the response of grassland, shrubland and a mixed grassshrub ecotone to precipitation varia
| PowerPoint PPT presentation | free to view
Earth’s Land PowerPoint PPT Presentation
Earth’s Land - How does wind wear down and build up the land? Wind erodes the Earth s surface by removing sand and silt from one place to another. (have we heard this before?)
How does wind wear down and build up the land? Wind erodes the Earth s surface by removing sand and silt from one place to another. (have we heard this before?)
| PowerPoint PPT presentation | free to view
Visitors to mounds: How the presence of a kangaroo rat affects reptile populations PowerPoint PPT Presentation
Visitors to mounds: How the presence of a kangaroo rat affects reptile populations - Visitors to mounds: How the presence of a kangaroo rat affects reptile populations ... Presence of a k-rat is associated with reptile diversity ...
Visitors to mounds: How the presence of a kangaroo rat affects reptile populations ... Presence of a k-rat is associated with reptile diversity ...
| PowerPoint PPT presentation | free to view
Top Down predator controls of ecosystem processes: Can coyotes Canis latrans dampen prey population PowerPoint PPT Presentation
Top Down predator controls of ecosystem processes: Can coyotes Canis latrans dampen prey population - Lepus californicus 207 199. Neotoma spp. 1,362 1,309. Dipodomys spectabilis 2,848 2,737 ... Lepus californicus 0.6. Neotoma spp. 3.7. Dipodomys spectabilis 7.6 ...
Lepus californicus 207 199. Neotoma spp. 1,362 1,309. Dipodomys spectabilis 2,848 2,737 ... Lepus californicus 0.6. Neotoma spp. 3.7. Dipodomys spectabilis 7.6 ...
| PowerPoint PPT presentation | free to view
Plant decisions and population dynamics of a cactus herbivore PowerPoint PPT Presentation
Plant decisions and population dynamics of a cactus herbivore - Herbivore impacts on cactus individuals and populations ... 'Escaped' biocontrol agent, Cactoblastis cactorum. Hight et al. (2002) U. Florida. Herbivores ...
Herbivore impacts on cactus individuals and populations ... 'Escaped' biocontrol agent, Cactoblastis cactorum. Hight et al. (2002) U. Florida. Herbivores ...
| PowerPoint PPT presentation | free to view
Indirect interactions between plants mediated by insect herbivores PowerPoint PPT Presentation
Indirect interactions between plants mediated by insect herbivores - Cholla Cacti. Grows in cylindrical segments. Main plant density occurs at the base of los pinos. ... 'Bug abundance on cholla cacti is greater on plants closer ...
Cholla Cacti. Grows in cylindrical segments. Main plant density occurs at the base of los pinos. ... 'Bug abundance on cholla cacti is greater on plants closer ...
| PowerPoint PPT presentation | free to view
PHP MapScript Applications at NACSE: Integrating Content from Research Databases PowerPoint PPT Presentation
PHP MapScript Applications at NACSE: Integrating Content from Research Databases - Northwest Alliance for Computational Science and Engineering - Oregon State University ... Herbarium specimen collections from several universities ...
Northwest Alliance for Computational Science and Engineering - Oregon State University ... Herbarium specimen collections from several universities ...
| PowerPoint PPT presentation | free to view
Ecosystem Imaging Spectrometer Mission ECOSAT PowerPoint PPT Presentation
Ecosystem Imaging Spectrometer Mission ECOSAT - Ecosystem Imaging Spectrometer Mission ECOSAT
Ecosystem Imaging Spectrometer Mission ECOSAT
| PowerPoint PPT presentation | free to view
Effects of variable rainfall and increased nitrogen deposition on nitrous oxide production in a semi PowerPoint PPT Presentation
Effects of variable rainfall and increased nitrogen deposition on nitrous oxide production in a semi - El Nino: Wetter years are associated with El Nino (warm cycle) whereas drought is ... John Craig. Jennifer Johnson. NSF. The lovely ladies of House 1. Questions? ...
El Nino: Wetter years are associated with El Nino (warm cycle) whereas drought is ... John Craig. Jennifer Johnson. NSF. The lovely ladies of House 1. Questions? ...
| PowerPoint PPT presentation | free to view
SAHRA Hydro DataBase PowerPoint PPT Presentation
SAHRA Hydro DataBase - Spatial properties (relationship and topology) Database design. Implementation ... on a monthly time step and spatially aggregated by the major gauging stations ...
Spatial properties (relationship and topology) Database design. Implementation ... on a monthly time step and spatially aggregated by the major gauging stations ...
| PowerPoint PPT presentation | free to view
Foodweb consequences of the spatial association between Dreissena and Hexagenia PowerPoint PPT Presentation
Foodweb consequences of the spatial association between Dreissena and Hexagenia - Second dreissenid, Quagga mussel, invaded a few years after zebra mussels ... Epifaunal invertebrate numbers increase in hard substrate zebra mussel clusters ...
Second dreissenid, Quagga mussel, invaded a few years after zebra mussels ... Epifaunal invertebrate numbers increase in hard substrate zebra mussel clusters ...
| PowerPoint PPT presentation | free to view
Simulating carbon dynamics in arid ecosystems: considerations for processbased modelling PowerPoint PPT Presentation
Simulating carbon dynamics in arid ecosystems: considerations for processbased modelling - (1) The inclusion of woody plant encroachment as a carbon storage pool alters ... Exposed mesquite roots in an arroyo. Needed: Quantify amount of root carbon, ...
(1) The inclusion of woody plant encroachment as a carbon storage pool alters ... Exposed mesquite roots in an arroyo. Needed: Quantify amount of root carbon, ...
| PowerPoint PPT presentation | free to view
Introduction to Ecology Nicholas J' Oehm, Jr' and Dr' Susan K' Dailey Office of Education and Outrea PowerPoint PPT Presentation
Introduction to Ecology Nicholas J' Oehm, Jr' and Dr' Susan K' Dailey Office of Education and Outrea - Introduction to Ecology Nicholas J' Oehm, Jr' and Dr' Susan K' Dailey Office of Education and Outrea
Introduction to Ecology Nicholas J' Oehm, Jr' and Dr' Susan K' Dailey Office of Education and Outrea
| PowerPoint PPT presentation | free to view
Opportunities for networklevel analyses emerging from the TRENDS project PowerPoint PPT Presentation
Opportunities for networklevel analyses emerging from the TRENDS project - Opportunities for networklevel analyses emerging from the TRENDS project
Opportunities for networklevel analyses emerging from the TRENDS project
| PowerPoint PPT presentation | free to view
The INRAM Biodiversity Database Project PowerPoint PPT Presentation
The INRAM Biodiversity Database Project - Funded via the NSF Experimental Program to Stimulate Competitive Research ... 3-year funding started March, 2002. ... Different database softwares and database models. ...
Funded via the NSF Experimental Program to Stimulate Competitive Research ... 3-year funding started March, 2002. ... Different database softwares and database models. ...
| PowerPoint PPT presentation | free to view
Differences in growth, water use and hydraulic constraints on two size classes of Larrea tridentata PowerPoint PPT Presentation
Differences in growth, water use and hydraulic constraints on two size classes of Larrea tridentata - Differences in growth, water use and hydraulic constraints on two size classes of Larrea tridentata
Differences in growth, water use and hydraulic constraints on two size classes of Larrea tridentata
| PowerPoint PPT presentation | free to view
Seasonal 3D eddy covariance evapotranspiration estimates from a Middle Rio Grande New Mexico riparia PowerPoint PPT Presentation
Seasonal 3D eddy covariance evapotranspiration estimates from a Middle Rio Grande New Mexico riparia - Seasonal 3D eddy covariance evapotranspiration estimates from a Middle Rio Grande New Mexico riparia
Seasonal 3D eddy covariance evapotranspiration estimates from a Middle Rio Grande New Mexico riparia
| PowerPoint PPT presentation | free to view
DIREnet Informatics PowerPoint PPT Presentation
DIREnet Informatics - ... and intensity (Fig. 2) of a major drought that was hotter than past droughts and may be one of the first documented global change droughts. ...
... and intensity (Fig. 2) of a major drought that was hotter than past droughts and may be one of the first documented global change droughts. ...
| PowerPoint PPT presentation | free to download
Internet%202%20and%20the%20Grid PowerPoint PPT Presentation
Internet%202%20and%20the%20Grid - Internet 2 and the Grid
Internet 2 and the Grid
| PowerPoint PPT presentation | free to download
The Role of Hyperspectral Data in Understanding the Global Carbon Cycle Susan L' Ustin, Pablo J' Zar PowerPoint PPT Presentation
The Role of Hyperspectral Data in Understanding the Global Carbon Cycle Susan L' Ustin, Pablo J' Zar - The Role of Hyperspectral Data in Understanding the Global Carbon Cycle Susan L' Ustin, Pablo J' Zar
The Role of Hyperspectral Data in Understanding the Global Carbon Cycle Susan L' Ustin, Pablo J' Zar
| PowerPoint PPT presentation | free to view
How has the climate of the U'S' changed over the past 50 years on national, regional and local level PowerPoint PPT Presentation
How has the climate of the U'S' changed over the past 50 years on national, regional and local level - How has the climate of the U'S' changed over the past 50 years on national, regional and local level
How has the climate of the U'S' changed over the past 50 years on national, regional and local level
| PowerPoint PPT presentation | free to view


Home About Us Terms and Conditions Privacy Policy Contact Us
Copyright 2024 CrystalGraphics, Inc. — All rights Reserved. PowerShow.com is a trademark of CrystalGraphics, Inc.
sevilleta — Search results on PowerShow.com