ANCOVA controlling baseline in RCT - how to perform power analysis and sample size estimation?

Hi, I have a simple question. I am hoping to perform a power analysis/sample size estimation for an RCT. We will be controlling for baseline symptoms, and using post-treatment or change scores as...

19 February 2021 2,648 23 View

Is MAXQDA a good choice for coding qualitative research?

Hello all! I am currently a PhD candidate in the middle of the data collection phase of my dissertation research. I have begun to look ahead to data analysis. To provide some background...

29 June 2020 3,474 3 View

What are the positive and negative effects of the COVID19 on university education administration?

Universities exist to provide three main services,namely: Teaching, Research and Knowledge transfer to the industry/community. With outbreak of the pandemic which has grossly impacted economies,...

01 June 2020 481 17 View

How can I approach the topic of DMN and combine it with LegalTech?

Hello! I am currently working on a project to bring automation into the legal field. As decisions must be based on various variables and be made in accordance with legal codes, information systems...

01 April 2020 3,942 3 View

How do i obtain/request sequencing and other data from chemo-resistant breast cancer patients?

Hi all, I was wondering how to go about obtaining highthroughput seq data from databanks. We are interested in the expression of a few genes we believe might regulate acquired chemoresistance. I'm...

11 February 2019 8,919 2 View

How do you properly clean a black 96 well plate for reuse in fluorescence reading (Poly Sorp Nunc flat btm wells, 12 mm well depth)?

Fluorescence quantification by plate reader

04 March 2018 7,230 13 View

What's the best method of collecting, temporary keeping and shipping blood samples for serum preparation and whole blood DNA extraction?

16 February 2017 3,608 3 View

Is there anybody who has examined conflict and frustration among unwed adolescent mothers in Africa?

I am interested in looking at conflict and frustration among unwed mothers in sub saharan Africa.

07 November 2015 9,010 1 View

How can I assess reliability and validity of a qualitative research questionnaire?

I am designing a research questionnaire on the experiences of adults learning numeracy. To assess the reliability and validity of my questionnaire I woul like to see a copy of a similar instrument...

15 December 2014 1,368 7 View

What are some recommendations for bacteriophage and euk. virus precipitation?

I'd like to precipitate and enrich for viruses from human samples (BAL, stool, serum, etc.) for metagenomic sequencing. Enrichment is pretty key for some sample types in order to get sufficient...

28 May 2014 2,060 3 View

Physics: Why do we describe light by referring to its wavelength, but microwaves and radar pulses by referring to their frequency?

In physics, the description of the properties of light generally refers to its wavelength (nm), while in the range of microwaves and radio waves we refer to the frequency of a signal (e.g. kHz or...

03 March 2021 1,682 3 View

Looking for Materials with high thermal expansion coefficient and high temperature resistance?

03 March 2021 8,272 1 View

Can we classify HV and LV lines based on line length?

I have dataset which shows the length of power lines. I need to classify the lines based on the line length. Is there a rule to classify the High voltage (HV) and low voltage (LV) lines based on...

03 March 2021 4,116 4 View

Waters 2707 HPLC autosampler problem?

I am using a 2707 waters HPLC device. When I try to inject a sample, it says missing plate or rack. I changed the needle and calibrated its position but I still get the same problem. I even get...

02 March 2021 1,408 1 View

Is There Any Feasible Method To Test Fluorescent Compounds Other Than Fluorescence Spectrometers ??

Is There Any Feasible Method To Test The Efficiency Of Fluorescent Compounds Other Than UV Spectrometers ? Suggestions Would Be Appreciated !

02 March 2021 5,785 3 View

Why almost every element would be metallized in sufficiently high pressure and low temperature?

(This statement is from wikipedia, BTW). What is so special about metallic bond that is limiting high-P low-T state of a matter (as long as individual atoms exist, not white dwarf of neutron star...

02 March 2021 3,309 2 View

Does anyone know HRM channel in a 2 plex QIAGEN Rotor- Gene Q qPCR can be used as a separate channel?

I am going to have 3 different probes in my qPCR work that I am going to do. But I realized that the machine we have in the lab is a Rotor-Gene Q 2plex HRM Platform, saying it has green, yellow,...

01 March 2021 8,544 1 View

I have designed reflectarray element and feeding it though Horn Antenna on HFSS. After full wave simulation, I am not getting desired results?

I have designed reflectarray element to generate OAM beams at 5.8GHz and feeding it though Horn Antenna on HFSS. After full wave simulation, i am not getting desired results i.e Radiation pattern...

01 March 2021 9,701 5 View

Samples to study circular dichroism (chirality)?

I want to build a low-cost polarimeter to study circular dichroism (chirality). What type of samples can I use? I am looking for samples that can be found outside the laboratory.

01 March 2021 9,101 3 View

How to accurately quantify chitin?

Hi all, I have been working on the quantification of chitin in insect samples and feed for a while but I can notice that the quantification methods (e.g. exposure to HCl, NaOH, and weighing sample...

01 March 2021 1,843 2 View