What is the error if one enters a categorical variable as a covariate in ANCOVA?

Hi there! I am attempting an ANCOVA test on SPSS, with categorical covariates. Most references recommend entering a categorical variable as a covariate after dummy-coding it. However, I am not...

12 October 2020 6,721 12 View

I am looking a systems analysis-related support! Can you help?

Hello there! We have done a literature review of three constructs. To keep things simple, I'll refer to them as A, B, and C. Now, the literature supports the following relationships (please...

18 July 2020 9,067 2 View

How to isolate bacterial RNA after adhesion to epithelial cells?

I am trying to isolate S. pyogenes RNA after adhesion to A549 cells. The protocol states lysis of the adhered bacteria from cell line by saponin/ trypsin treatment followed by total RNA...

08 October 2019 8,984 3 View

What is the reason for using the quantity of -log(NOx/NOy) ratio as a photochemical clock?

There is a paper that was published in Atmospheric Chemistry and Physics by Wang et al. in which they have plotted the mass absorption coefficient (MAC) of brown carbon (BrC) with -log(NOx/NOy)....

06 September 2019 1,165 3 View

How to calculate standard deviation in Measurement Analysis?

22 January 2017 1,209 2 View

Fractional impervious surface (FIS) map ?

Need Help Does anyone Know how to make a Fractional impervious surface (FIS) map from NDVI map, in ArcGIS environment? Thanks in advance

24 February 2021 8,455 2 View

Are there methods for automatically mapping floodplains, fans and terraces?

I want to map these river geoforms with as little subjectivity as possible. I have a high resolution DEM generated by drone data.

22 February 2021 7,800 3 View

I have done flood mapping using sentinel 1 image but for validation i am unable to find any dataset...what dataset should i download...??

I have done flood mapping using SAR but for validation i am finding difficulty in getting a data set...i opted for LANDSAT image but there i am facing difficulty in cloud coverage as coverage is...

16 February 2021 4,620 3 View

Which satellite image gives best results for Land Use land cover classification(specifically for built up regions) for Indian region ?

Landsat, sentinel and USGS satellite images have varying accuracy for identification of urban built up dynamics ? Which one is best suited for India

04 February 2021 8,632 8 View

What are possible factors influencing the isotope-based hydrograph separation in river confluences?

When performing hydrograph separation (EMMA method) with isotope tracers in river confluences (natural large basin), we found that the contribution of each end member sometimes exceeds the...

20 January 2021 8,403 5 View

What are the natural background values of Major,Trace and REE elements in sediments deposited by Indian rivers?

We are working on geochemical analysis of sediments derived from eastern and western ghats of India.

20 January 2021 8,963 6 View

How can I solve this problem in my "Direction flow" map?

Hi I am working on a study and need to create "Flow line" by a tool in ArcGIS same as "Direction flow". You can give the topographic map to this tool and it can return you the flow direction map...

18 January 2021 1,728 8 View

How to extract Slope and Aspect from Elevation data in ArcGIS?

How to extract Slope and Aspect from Elevation data in ArcGIS?

17 January 2021 4,217 7 View

How to prepare HSG map with soil map obtained in pdf format?

I have obtained Soil map in pdf format. I want to prepare HSG map in ArcGIS to integrate it with land use land cover map to calculate curve number. Can anyone tell how to prepare HSG map from soil...

16 January 2021 4,826 4 View

Can someone kindly explain a method to generate kmz./kml. of a scanned raster image map using ArcGIS without changing its original resolution?

I have generated a kmz. file of a scanned geological map. But when it is opened through Google Earth, the resolution is very low and cannot zoom in with clear colours. Is there any method to this?

14 January 2021 3,692 2 View