Questions related to SCM
Hi! I need some help with the analysis of AAS results.
We're analyzing the Ca and Mg content of soil and water samples. As means of determining the amount of metals in ppm (mg/L and mg/kg), we conducted the standard calibration method and the standard addition method. We already made a standard calib. curve (absorbance vs conc) for SCM method beforehand.
Sample details: SCM
1. 15g soil digested to 100mL (acid = aqua regia), 500 mL of water samples digested to 100 mL
2. We took 50mL alqt. each, then diluted it to 100 mL
3. Direct measurement of sample was taken using respective lamp, then recorded.
4. ppm in mg/L of metal in sample was determined using SCM curve with x=(Absorbance-b)/m
5. conversion to ppm in mg/kg for soil: im unsure how to go about this and where to include the dilution factor of 2
Sample details: SAM
1. flask volume = 25mL, solvent = aqua regia, standard conc. = 200 mg/L
2. sample volume = 0.100 mL was taken from the 50mL alqt. diluted to 100 mL (we used a micropipette for accuracy. due to very high absorbance upon spiking w/ standard, we were not allowed to use aqua regia in larger quantities by our professor bec. of safety issues, so we were not able to dilute samples further)
3. sample spiking: 6 solutions with 0, 0.1, 0.2, 0.3, 0.4, 0.5 mL each of 200 mg/L standard
4. we measured the absorbance and plotted standard addition curves (absorbance vs amt of added std.
5. overall, the SAM dilution factor is (100/50)*(25/0.1) = 500
6. mg/L of metal in sample = -(-b/m)(dilution factor)
7. conversion to ppm in mg/kg for soil: im also unsure how to go about this and where to include the dilution factor, or if i even need to include it
We had the calculations down beforehand, however, since our AAS in our institution broke, we took a pause from the experiment, and some handwritten solutions were lost 😅 we also lost a lot of volume for some water samples since we had to filter some more than once. so in one of our water samples, the dilution factor is (100/15.5)*(25/0.1) and the mg/L of Ca is 2000+. it doesn't match up with our other samples.
Thanks in Advance!
SCM is performed with many laboratory tests, which depends on thier counties and their standards. But my question is which is followed to achieve the optimum results?
Dear fellow researchers,
I am currently searching for empirical works that compared two different theories / theoretical views (ideally, but not limited to the OM/SCM domain) and therefore developed opposing hypotheses. Can you give me any suggestions?
Any help would be much appreciated.
In my opinion,
- the configuration in SCM(software configuration management) refers to management of resources,
- and the configuration in configurable software refers to the combination of configuration options and corresponding values.
Any suggestions are welcome.
Is it possible to use the Synthetic Control Method in the firm-level study?
Currently, I am trying to measure the impact of environmental regulation (state-level emission trading scheme) on a firm's green innovation. I have used DID and PSM-DID but want to use SCM with firm-level data, is it applicable? I found most of the paper used state-level data. Expecting your kind opinion in this regard.
I am trying to apply stresses in the ReaxFF module of SCM and compute the stress strain curve for the same. The molecular structure has a tusk like shape with a sheet like structure connected at the base. Every time I set up the model using the desired lattice vector strains, the model ends up rotating around an axis rather than straining and failing in the specified direction. Volumetric strain is also yielding the same results. Has anyone got any suggestions or previous experience regarding the same? Can you please share the method you used with me?
Thanks in advance,
In the optical fiber transmission systems, the data can send as several channels together, whether via WDM or SCM system. Can we say that the common analog two-tone transmission is called the SCM system?
I have an atomic force microscope (AFM) with scanning capacitance mode (SCM). I would like to find a known good sample that lets me check if my tip and microscope are working correctly. For topography we have gratings. For magnetic force microscopy, we have magnetic tape. What is the equivalent for SCM?
Beyond a quick check, are there specimen or best practices for calibrating the capacitance measurements?
I am looking for a colleague or a supervisor to write an ISI Article about the area of SCM and Machine learning that I am keen on it
Anyone is interested to help me or colloborate with me just message me here
I am looking forward to your reply
I need to perform some Scanning capacitance microscopy (SCM) & Spreading resistance profiling (SRP) on some samples. Thus I am looking for labs that offer this service.
Using the spectral collocation method (SCM), I have successfully obtained the complex wavenumber k, displacement U and stress field S of different LAMB modes.
However, when I used the obtained k/U/S form the SCM method to solve the LAMB wave edge reflection problem, I had trouble with the calculation of energy reflection coefficients.
The sum of all the non-zero energy reflection coefficients (corresponding to the propagating modes) should be equal to 1, but I failed to get that right and the sum of those coefficients turned to be variable.
Power flux has been calculated as described in Mode-exciting method for Lamb wave-scattering analysis (JASA, 2004) by Arief Gunawan, and Sohichi Hirose in the form:
<P> = Real ( -iw/2*intgrate(sigma*·(du/dt), -h,h) )
If anyone has ever met this problem or knows how to solve it? Or, if there is any program available online for us to use and study?
I have been checking my program over and over again for half a month, but I still can't find the causes. Thank you so much for spending your time reading my question. I would really appreciate it if you can help me with this problem.
My program was written with reference to the article of Prof. Pagneux and has been attached as NromalIncident-Vincent Pagneux way.zip, in which the LambDispersionValidation.m can be run to check the basic results of my program (compared with the online program from https://www.mathworks.com/matlabcentral/fileexchange/73050-lamb-wave-dispersion-curve, as shown in the figure below).
To help you understand my program and save your time, I want to tell you some details about my codes:
- I can get the dispersion curves (as shown in the figure below). So I think the results of complex wavenumber k are right.
- For LAMB waves propagating in +x direction, the displacement field was assumed as u = U*exp(i(kx-wt)). The numerically obtained k may have the form a + bi, a - bi, -a + bi, -a - bi (a and b are positive real numbers). In the GetkInOrder.m, I have kept only those k with positive real part (+x propagating) and positive imaginary part (physically decaying with propagation).
- For LAMB waves propagating in -x direction, the displacement field was assumed as u = U*exp(i(-kx-wt)), so the k will be still kept k = a+bi.
Even though my institute has licenced version of TOPAS, but my access to it is quite limited. A free software would provide me with the freedom to work at any time.
I am still in search of a free database which I can use for the purpose of unhydrated and hydrated cement.
I just wanted to share some interesting insight from an "experiment" with open access. Recently I published a paper about Blockchain and SCM with Emerald Publishing. The paper was online for several weeks and I had roughly 15 downloads a day:
Fortunately, the publisher offered me to make the paper open access (I do not have any specific funding for that):
After that, the downloads tripled with roughly 40-50 downloads a day. Of course, this does not say anything about how often the paper will get cited, but it clearly shows that OA fills a need. It might also widen the gap between those institutions who can afford to pay for it and those who can not. In other words: research from affluent institutions might also get cited more, since it is simply easier to access it.
I have recently been thinking to research on the above given topic, however my difficulty is I don't want to make it technical. Involving statistical and algorithm based interpretation is the last thing I want to incorporate in my research as I wanted to study 'how efficient use of Big Data can optimise the supply chain operations'.
Requesting the experts here to suggest how I can make my research specific without making it technical? is it really possible to exclude the algorithms from my research based on the topic?
If No then please suggest any other similar topic?
I realize that Structural Equation Modelling is currently used in many fields of SCM and Logistics, such as Supply Chain (SC) agility , Sustaintable SC, Disaster Response logistics, and some others.
Why is the use of SEM becoming popular among Logistics and Supply Chain researchers?
What can be wrong when using SEM in logistics and SC?
Many companies have their subsidiaries in WW. We can visualize their relationship including the location/country via SNA (social network analytics) . It can give us a insight if there is any issue and secure our supply chain well management.
For example, there are many HDD suppliers located in Thailand. Unfortunately, 2011 Thailand floods did a big impact to PC industry. Can we combine this kind of social network and weather FCST and predict the next disaster on which chain node?
Adding of SCM's to the grout mix is helping a bit. Is there any other more effective methods?
Any specific nano particles? polymers? to add to the grout mix. or any other means.
In the last 25 years, outsourcing has emerged as one of the key globally focused supply chain strategies . After the mid-1990s, the importance of supply chain management (SCM) increased noticeably among practitioners. As a result, the study of supply chain and outsourcing has increased exponentially. In developing markets, with increasing customer demands, outsourcing non-core business
functions has become a commonplace supply chain strategy for many companies and organisations.
Industry 4.0 is changing the labor needs and market trends rapidly. Up to how much extant it can change the future canvas of business. Which areas in particular(HR, Finance, marketing, SCM, etc) ?
I am an MSc in Supply Chain Management student, and I am about to start my dissertation on Social Sustainability in the electronics sector. Any SCM or member of a sustainability related ONG that can help me with an interview?
It would be in February, I promise I wont take too much of your time.
The use of supplementary cementitious materials (SCMs) is increasing rapidly as they can be used to partially or totally replace OPC in concrete.
The most common types of SCMs are fly ash, slag, metakaolin and silica fume. However, the supply of some of these SCMs will be limited in coming years.
What are the other types of emerging SCMs that can be used in concrete?
The followings are my research questions:
A. How does the adoption of digitisation in supplier collaboration enhance the effectiveness of supply chain management?
a) What are the deciding factors which predict improved performance through digitisation of supplier collaboration?
b) What are the most beneficial SCM KPIs when taking also into account the digitisation of supplier collaboration?
I'm currently designing a case study and are exploring how to make a rigor case study design. Therefore, i'm interested in identifying key references on how to conduct case studies within operations- and SCM research?
I want to start my research in the area of Supply Chain Management.
please give some suggestions to select the topics related to them.
The end use of my research is helpful to our society.
The major contribution towards strength development in OPC or blended cements containing SCMs is from C-S-H gel. Does C-A-H phases contribute towards strength development? If in calcium aluminate cements C-A-H phases are the only phases that contribute to the strength, then the C-A-H must be having some contribution in the development of strength in OPC or blended cements containing SCMs
I understood that Successive corrections methods (SCM) and Optimal Interpolation (OI) method/Least-squares methods are used for merging data. but I don't know they are good for this subject or not. if yes how can I do that and if not what is the other method?
I am facing difficulty while collecting the data because the my target population are quite difficulty to be reached i.e. Supply chain professionals. Any idea or suggestion for the collection of data through questionnaire?
when it comes about nerve supply of SCM and Trapezius, it was written that" since both are the derivatives of branchial arch so both are supplied by spinal accessory nerve." but in embryology text book describing derivatives of branchial arch i donot find these muscles in the list. so i want clear picture about developmental source of these muscles and functional components of spinal accessory nerve.
Many SCM are tested to lead the idea of sustainable construction.Re-cycled materials except fly ash are the interest of my research.Long term performance of these type of cement is also a matter of my interest.
What is the maximum current rating of SCM PIC or SCM PIT tip coated with PtIr normally used for conductive AFM? Is it possible to measure ~mA current with this tip?
What is the role of information systems in agility of Supply Chain Management (SCM)?
Can information and knowledge sharing affect agile SC? How?
The fashion retailer Zara (Inditex) is always used as a case study for good Supply Chain Management (SCM). Sometimes Zara´s SCM is even referred as its main core competency.
I know from other papers (e.g. Ghemawat, HBS case 9387018) that researchers have tried to quantify the impact of their competencies on their performance (e.g. Wal Mart´s Brand reputation and employee loyalty is supposed to lead to operational savings of 3.0% of sales, compared with the competitors).
So my question is: Zara is successful, no doubt, and it has an excellent SCM. But how important is Zara´s SCM really for its overall success? Can anyone help me to find a good source where it was quantified?
I am working on an experimental involving fly ash (that has 0.01% CaO content), lime powder and Cement. I have to perform thermogravimetric analysis on my samples to ascertain Ca(OH)2 content to relate it to hydration activity in the binder paste. Just wondering how the results having (i) cement and fly ash (ii) cement, fly ash and hydrated lime powder can be normalised to the control mix i.e. cement paste.
My main concern is if a mix design has high volume fly ash content (that has 0.01% CaO content), say for instance 60% fly ash and 40% cement, it will have relatively very low Ca(OH)2 content as compared to OPC mix (that contains very high lime content). Comparing these two mixes based on their Ca(OH)2 content at a certain age wouldn't be a true comparison because of a big difference in their respective lime contents.
We're interested in blended cements with slag and fly ash, and we'd like to define an effective protocol to determine chloride freeing in the binder matrix in order to predict binder resistance of the binder, and carbonation related issues. Which experimental techniques do you think could be better to obtain significant differences between different binder mixes?
I need an article about a single facility problem or multiple facility problem in rectilinear distance or euclidean distance, or an article about a tree network problem or cyclic problem ( 1 median problem or 1 center problem or n center problem ).
Business to Business applications usually deal with the logistics between the interested businesses. However, Supply Chain Management applications are playing a major role in fixing and managing that relation too, so are those application separate or integrated?