What is the difference between soluble ions and exchangeable cations? And How to determine each of them?

I used percolation columns to reclamation saline-sodic clay soils . And my question is, What is the difference between soluble ions and exchangeable cations?

18 January 2021 6,868 3 View

There are any reason for increase PEC perovskite solar cell after a week?

my measurement shows PEC increase after a week to tow weeks. my composition was FA0.85CS0.15PbI3 and free HTM on meso-TiO2 structure fabricated devices

07 February 2020 6,902 2 View

How can we find a proper journal for publishing a specific topic?

In order for finding an appropriate journal for submitting the manuscript of a specific topic, I am confused so much. The topic is relating to applying a stochastic process on entrepreneurship...

26 January 2020 3,111 3 View

Can anybody help me with my XRD test results?

I have andesite source of road aggregates. I did XRD test on bulk powder and oriented samples ((1) air dried, (2) treated with ethylene glycol at 60oC, and (3) heat-treated at 550 oC for 45...

17 December 2018 9,207 2 View

Is it true, that herbal remedies have role in management of chronic diseases like hypertension , diabetes and renal diseases ?

in our society a lot of people with chronic diseased use herbal medicine in the course of treatment

13 November 2018 8,285 11 View

Does anybody has any idea about the equation of the compaction curve of granular materials and how the Optimum Moisture Content can be calculated?

I mean after doing the compaction practice in various water contents and determining the dry density corresponding to each water content, what would be the equation of the resultant compaction...

03 November 2018 8,794 10 View

How can I recognize the weathering of the glass phase in my materials?

Could you please find the attached image and let me know if the presented data can show any weathering in the glass. Based on my understanding, the glass in the structure of my materials remained...

23 October 2018 4,585 1 View

Any advice how can I determine the proportion of Yellow-ish and Brown-ish color in a color photo?

A solution in MATLAB Software is preferred.

11 October 2018 3,442 2 View

In which condition should the California Bearing Ration be employed?

These are the questions I faced in my literature review I could not find an answer for them. Just for the record, I am going to do the CBR test on laboratory compacted base materials in the...

22 August 2018 5,711 8 View

What are some research areas to explore with regards to Construction Engineering and Sustainability?

I want some ideas for a Master of Science in Civil Engineering thesis topics, which surround sustainability specifically in the field of Construction Engineering.

20 August 2018 7,456 12 View

How to compare two groups with only two measurements?

Hiiiii everyone! I have an enquiry on statistical analysis. I was looking for many forum and it's still cannot solve my problem. I want to compare means of two groups of data but only with two...

03 March 2021 8,796 3 View

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10?

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10? Since, the growth curve from day 2 to 10 won't be like the "Logistic curve" it might not follow logistic...

03 March 2021 1,401 3 View

How to increase a model accuracy ?

dear community, my model is based feature extraction from non stationary signals using discrete Wavelet Transform and then using statistical features then machine learning classifiers in order to...

03 March 2021 6,994 5 View

1. What is the impact of having different scales in a survey? and how can we solve this problem before and after data collection (Literature)?

1. What is the impact of having different scales in a survey? and how can we solve this problem before and after data collection (Literature-based reflection)? Thank you for your time and for...

03 March 2021 2,870 3 View

What degree of missing data in a particular case/participant results in Expectation-Maximisation no longer working?

I'm dealing with a mediation model and am using the PROCESS module in SPSS. Due to SPSS and PROCESS being limited in the imputation methods - being unable to handle multiple imputation - the other...

02 March 2021 4,362 1 View

Research on Supply Chain Management in Indian context?

Hi, I am planning to apply for the PhD degree in the Supply Chain Mgt. with specific area of "Cold Storage warehouses" during Pandemics and wars. Where lock downs and shut downs are frequent....

02 March 2021 285 2 View

Can you share me how teacher education is managed in your respective national educational system?

I feel that the practice in teacher education in my country is below the expected performance level due to very poor management system. Hope I will learn something from your experiences.

02 March 2021 1,516 4 View

Which is a lucid standard comprehensive book to guide on psychological scale construction and its standardization?

02 March 2021 7,082 3 View

Can NFL theorem be valid in infinite search space in ML?

NFL theorem is valid for algorithms training in fixed training set. However, the general characteristic of algorithms in expanded or open dataset has not been proved yet. Could you show your...

01 March 2021 1,189 3 View

How does one access the Cranet survey data on HRM practices?

Hello, The Cranet website does not provide any lead to the data obtained from their multinational survey on HRM practices. Any help on accessing the data would be most appreciated. Thank...

01 March 2021 9,536 3 View