Hi Lowyatians,

I'm a PhD student and am currently in data collection phase and hence appreciate if you can help me fill this questionnaire. Simply click on the given link and I assure you it will take not more than 5 minutes of your time.
Thanking you in advance.

https://docs.google.com/forms/d/1WvsMnuje1e...O0pnFc/viewform

Is your research a fully quantitative research or a mixed method?

Because I'm somewhat worried about the entire structure of the questionnaire.

Hi there,

I am using a mixed method involving SEM-PLS & Content Analysis. These set of questions were derived from past research to which we customized to fit into the context of our study.

Thanks.

Cool then.

U have the Qualitative aspect to complement the PLS-SEM.

Why you use Smart Pls instead of Amos?.. Smartpls is more of predictive purposes to maximize the r2. Gona be interesting to see ur final results.. Good luck

friends, update your info here

https://docs.google.com/spreadsheets/d/13Vg...dit?usp=sharing

Hi Guys,

is there anyone who are in/currently working on the hydrogen fuel cell?

Heh Blofeld,

What type of questionnaire is the best to use Likert scale 1 to 10?



How will I know when Likert scale 1 to 5 is not sufficient?



How to motivate people to participate as respondents to a questionnaire?

This post has been edited by Critical_Fallacy: Feb 11 2015, 04:37 PM

Heh Blofeld,

When identifying research gaps in social science, is the magnitude of "Mempersoal" a loophole the same as "Meragui" and "Mencabar"?

Is the theory on Human Motivation science-based or faith-based?

Hello Critical Fallacy,

Until today, there is no consensus agreement among researchers on the number of response options for a Likert scale although the common response options used is either 5-point or 7-point. Different authors would advocate for a different number

There are also recommendation that one should take away the middle-point when catering to Asian respondents because Asians tend to choose the middle options. In this case, the 6-point scale would be more appropriate.

The 5-point scale should suffice. And it's rare for anyone to use less than five except for some questionnaire relating to personality.

How to motivate people to answer the questionnaire? I would like to have that answer too

One of the recommendations given is to provide token of appreciation such a voucher to those who answered. Some even relied on lucky draws.

I'm not sure of the different meaning for each word above. Regardless of the differences, the best way to identify research gaps in social sciences is to find the missing link between the variables. It's akin to playing the jigsaw puzzle

Early theories on motivation were derived from inductive reasoning (eg. observation). Strong advocates of deductive reasoning would argue that inductive reasoning are not scientifically strong. So, probably it's logically faith-based. Some may argue that inductive reasoning is also considered scientific. So, it could be science-based as well.

Thanks for your explanations. I tend to liken the idea of "Mempersoal" some social issues of academic interest to seeking clarifications by scientific and logical means under human rights and civil liberties.

For example, in analyzing the respondent-driven sampling data, How does an emotionally-detached role-playing expert factually determine the credibility of a data/testimony from a person or entity?

The emotions of a researcher has a role to play in a qualitative social science research (inductive approach to research).

Whereas in a strict quantitative deductive research, there is no room for the researcher's emotions.

Out of curiosity, what are some of the promising materials for sodium-based battery (as anode)? I presume intercalation would be a more prominent issue with Na. With the risk of high volume expansion after several cycles, is Na-battery really deemed to be safer?

Also Na-battery may have slower charging/discharge rates and lower energy density. Other than safety, is there any other real selling point for Na-batt?

You have asked some very good questions there...

Generally, anode materials for Na battery are classified into two categories: Na-based and non Na-based. One of the very promising Na-based anodes will be Na2Ti3O7, and its cousin, Na2Ti6O13. Both are titanium-based compounds, therefore they are fairly cheap. Another potential candidate is Fe3O4. But efforts are still underway to solve the peculiarly large irreversible capacity loss during the first cycle for Fe3O4.

Yes, intercalation is a common issue with Na batteries, due to the larger ionic radii of sodium ions, as well as its heavier atomic weight. However, a lot of effort has been devoted to solve this issue, including nanostructuring and increasing its conductivity.

Actually, most sodium compounds show lesser volume expansion than its lithium counterpart. For example, Na3V2(PO4)3 displays a more subdued lattice expansion upon cycling than its lithium analogue, Li3V2(PO4)3. In fact, because of this low volume expansion, many sodium-based compounds can achieve >1000 cycles at very fast rates, with minimal capacity fading.

However, one thing I have to agree is that the energy density for Na battery is always inferior to Li battery because of the higher redox potential and atomic weight of Na. But having a battery which can go up to very high voltage cannot be realised yet, due to the issue with instability in non-aqueous electrolyte.

Other than safe, Na battery is also relatively cheap. Sodium is very abundant in nature compared to lithium. You can find sodium in sea water, soils, rocks, etc. Currently, lithium is extracted from lithium carbonate, and the cost is going absurd due to the low supply of this lithium source. Besides that, the production cost to fabricate a Na battery is also lower. Aluminium foil can be used as current collector for both the anode and cathode, whereas copper foil (which is more expensive than aluminium) is needed for the anode in Li battery.

your from fuel cell institute UKM ka?

feel like taking phd but dunno which uni to go to

Thank you for the pointers. These explanation is pretty helpful and after doing some reading I am convinced in many ways that Na-batt can be pivotal for next generation energy storage technology. I would probably work on some studies on WS2/MoS2 with my post-doc and maybe start working on black titanium dioxide if I could.

Thanks and have a good one

Why not try NUS?

No problem.

Which uni are you joining?

Doing my PhD in the states, and you? We can have do personal message to talk more.