Wahyudin Syam - Wahyudin Syam (Page 5)

Datum references, tolerance zone and material condition in GD&T

This post explains some fundamental elements of GD&T. The elements are datum reference (datum reference frame), tolerance zone and material condition.

Tolerancing

Examples on how to interpret GD&T: Form, orientation, location and run-out tolerances

This post presents and discusses real examples on how to interpret GD&T tolerancing symbols from technical drawings.

Metrology

The role of measurement uncertainty in quality inspection

In quality inspection, measurement uncertainty has a fundamental role in deciding the conformance and non-conformance of a part.

Metrology

Understanding measurement model, systematic error and random error

In this post, three important aspects in measurement are concisely discussed. The three aspects are measurement model, systematic error and random error.

Metrology

Measurement uncertainty estimations: Monte-Carlo simulation method

In this post, a method to estimate measurement uncertainties based on Monte-Carlo simulation is presented with examples.

Academic writing

12 fallacies that should be avoided when constructing arguments

In this post, 12 fallacies when writing arguments for scientific articles are presented with examples. Some of the presented fallacies seem to be very small and commonly used, but those fallacies completely change the meaning of arguments written in a scientific article.

Metrology

Measurement uncertainty estimations: GUM method

Any types of measurement results should be presented with their associated uncertainty. In this post, a method to estimate measurement uncertainties based on Guide to the expression of uncertainty in measurement (GUM) is presented with examples.

Academic writing

Five fundamental rules for scientific writing that are applicable for all fields

This post explains five important rules to write scientific articles. The rules can be applied to all types of research fields. The five rules are logical, clear, accurate, concise and audience-dependence.

Tolerancing

3D tolerance stack-up analysis with examples

In this post, 3D tolerance stack-up analysis will be explained with two examples. Both traditional “+/-” dimensional tolerance and geometrical tolerance (GD&T) are considered.

Tolerancing

2D tolerance stack-up analysis with examples

Every part constituting an assembled product has tolerances assigned to the part’s features. These assigned tolerances cause variations on the key characteristics (KCs) of the assembled part. How can we know how much the variations on the KCs before manufacturing the parts?

Metrology

Ten types of dimensional and geometrical measurement error

In any dimensional and geometrical measurements, different types of measurement error decrease the accuracy of the measurements. These types of measurement error are due to measurement procedures and the structural elements of an instrument

Academic writing

Five common small writing mistakes that destroy an article

Very often, we have writing mistakes that seem to be small. However, those mistakes significantly damage our articles.

Research

50 proven practical tips for successful PhD and research that everyone should know

To be successful in research or PhD, anyone can apply these 50 proven tips that are applicable for all types of research activities and PhD studies.

Tolerancing

Understanding fixturing constraints: locator, clamping, support and guide

Fixturing system has a very important role in assembly processes. Despite the complexity of fixturing systems, there are four main roles that fixturing systems should have. The four roles are locating, clamping, supporting and guiding parts during assembly processes.

Tolerancing

Understanding fundamental assembly features: Mate and contact features

Assembly is the final step to make a product in its complete form. However, no matter how complex the geometry of a part is, the part’s assembly features are boiled down to two fundamental types: mate and contact features.

Academic writing

Writing is at least 25% of research time

Many people will leave the writing part of their research at the last after they have done experiments and data analyses. This way is wrong and we should avoid this paradigm.

Metrology

The fundamental difference between Vernier calliper and micrometre

Vernier calliper and micrometre are very common to be used for dimensional measurement. However, many people do not know their fundamental difference.

Tolerancing

Assembly and tolerancing

Assembly processes are “the moment of truth”. There is none other better phrase to describe assembly processes than the phrase.

Metrology

Five reasons why measurement uncertainty is important

To understand the importance of measurement uncertainty in practice, we present at least five reasons of why measurement uncertainty estimation has an important role

GNSS

Beware of reading signal-to-noise ratio (SNR) from power spectral density (PSD) plot

In radio communication signal analysis, for example global navigation satellite system (GNSS), a common step before analysing received signals is signal data inspection.

Research

Is research expensive?

People always ask: “is research expensive?” and how much advanced countries spend their money on research. The answer is obviously yes, but also NO. here is why.

Academic writing

Texts explain figures (in writing)

In academic writing, we very often provide figures to explain, for example, experiment results. The correct way of the explanation should be texts explain figures.

GNSS

TUTORIAL: RFNoC 4 environment development setup for USRP devices

This tutorial is for setting up Radio Frequency Network-on-Chip (RFNoC) version 4 FPGA environment development on universal software radio peripheral (USRP) devices

Research

What is the essence of PhD?

When people get their PhD, very often, we think that they know everything about their field. The truth is they are not.

Metrology

How to correctly present a measurement result

When we do a measurement, for example a length measurement, it is not correct to only present the measured length.