Eren Darici on eren darici

What I Listened To This Week (10/5 - 10/24)

Sat, 24 Oct 2026 00:00:00 +0000

As I mentioned in my last post, I knew that it was going to be a crazy few weeks, and it was. So instead of “What I Listened to This Week,” I present to you “What I Listened to Over the Past 20 Days”. On the other hand, I’m glad that I wasn’t able to write because I was able to listen to a bunch of new releases along with some of my favorites.

What I Listened To This Week? (9/28 - 10/4)

Sun, 04 Oct 2026 00:00:00 +0000

I used to do this type of content on Substack (no, I won’t be linking it in here), but now that I have my name as my domain, I think it makes more sense to do it here. I will try to keep this weekly, but I can’t promise that I will be able to do it every week. For those who don’t know, “What I Listened to This Week?” is a weekly post where I share the music I listened to during the week as a way to keep log of my experiences and force myself to discover new music -obviously I need content.

Agalar, Brolar, ve Asklarim

Mon, 01 Jan 0001 00:00:00 +0000

Hepinizi seviom adinizi unuttuysam mesaj atin.

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Ismail Mert Etil M.D. - canimkarim

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Ezgi Konanc - kardeshim

Idil Okten - kebabo

Curriculum Vitae

Mon, 01 Jan 0001 00:00:00 +0000

Contact

Eren Darici
Ph.D. Student, Industrial Engineering
Western Michigan University

Email: hello@erendarici.com or eren.darc@wmich.edu

Research Interests

Operations Research / Mathematical Optimization
Machine Learning
Simulation Modeling
Decision Support Systems
AI Applications in Industrial Engineering

Education

Western Michigan University

Ph.D., Industrial Engineering (2025–Present)
GPA: 3.92/4.00

Western Michigan University

M.Sc., Industrial Engineering (2023–2025)
GPA: 4.00/4.00

Thesis: Optimization of the Room Booking Processes in a Nonprofit Organization

Eskisehir Technical University

B.Sc., Industrial Engineering (2019–2023)

Get in Touch

Mon, 01 Jan 0001 00:00:00 +0000

If you’d like to get in touch, feel free to reach out by email or connect with me through the links below.

Personal Email: hello@erendarici.com

WMU Email: eren.darc@wmich.edu

Socials

Lab 1 - Introduction to Mathematical Modeling

Mon, 01 Jan 0001 00:00:00 +0000

1. Introduction to Operations Research Modeling

Operations Research (OR) is a scientific approach to decision-making using mathematical models.

A typical OR model consists of:

Decision variables → what we control (e.g. production quantity)
Objective function → what we optimize (profit, cost, service level)
Constraints → limitations (resources, demand, capacity)
Parameters → fixed input data

The OR modeling cycle

Define the problem
Build a mathematical model
Solve using an algorithm/solver
Interpret results and validate

3. Model vs. Language vs. Solver

Mathematical Model (Abstract)

The mathematical formulation:

Lab 2 - Mathematical Programming Examples

Mon, 01 Jan 0001 00:00:00 +0000

1. Introduction

This lab introduces additional mathematical programming examples and demonstrates how optimization models can be formulated in both open form (explicit equations) and closed form (set-based notation).

Topics covered include:

Cake Production Problem
Diet Problem
Dorian Auto Advertising Problem
Indexed decision variables in PuLP
Summation notation using lpSum

2. Cake Production Problem

A bakery produces two types of cakes:

Plain cake:
- 200g flour
- 25g fat
Chocolate cake:
- 100g flour
- 50g fat

Available resources:

Lab 3 - Assignment and Transportation Problems

Mon, 01 Jan 0001 00:00:00 +0000

1. Introduction

This lab introduces transportation and assignment problems, two important classes of optimization models.

Topics covered include:

Transportation Problems
Assignment Problems
Powerco Transportation Example
Decision Variables with LpVariable.dicts()
Useful Pandas Concepts for Optimization

2. Recap: Transportation and Assignment Problems

The Assignment Problem is a special case of the Transportation Problem.

Key characteristics:

Assignment problems typically have many zero-valued technical coefficients, allowing specialized solution methods.
Transportation problems represent a many-to-many (m:n) matching problem.
They are modeled as bipartite networks connecting sources and destinations.
Common applications involve shipping products from factories to customers or regions.
The objective is usually to minimize total transportation cost while satisfying supply and demand requirements.

3. Transportation Problem: Closed Form Model

Decision Variables

$$ x_{ij} = \text{amount shipped from source } i \text{ to destination } j $$

Parameters

$c_{ij}$ = transportation cost from source $i$ to destination $j$
$s_i$ = supply available at source $i$
$d_j$ = demand required at destination $j$

Objective Function

$$ \min \sum_i \sum_j c_{ij}x_{ij} $$

Constraints

Supply Constraints

$$ \sum_j x_{ij} \le s_i \qquad \forall i $$

Demand Constraints

$$ \sum_i x_{ij} \ge d_j \qquad \forall j $$

Non-negativity

$$ x_{ij} \ge 0 \qquad \forall i,j $$

4. Powerco Transportation Problem

Powerco operates three electric power plants that supply electricity to four cities.

Lab 4 - Assignment Problems and Shortest Path

Mon, 01 Jan 0001 00:00:00 +0000

1. Introduction

This lab introduces two important network optimization models:

Assignment Problems
Shortest Path Problems

Topics covered include:

Machineco Assignment Problem
Mathematical formulation of assignment problems
General shortest path model
Seervada Park shortest path example

2. Assignment Problem

The assignment problem seeks to assign resources to tasks while minimizing cost or maximizing effectiveness.

Common applications include:

Assigning workers to jobs
Assigning machines to tasks
Assigning vehicles to routes
Assigning students to projects

The assignment problem is a special case of the transportation problem where:

Open Source

Mon, 01 Jan 0001 00:00:00 +0000

I build open-source tools at the intersection of software and music. Most of these projects explore audio processing, plugin development, and practical utilities for musicians.

Spotify Keyfinder

Python · Flask · Spotify

A web utility for retrieving information about the song currently playing on Spotify. The project uses Flask and the Spotify ecosystem and can be run locally.

Eren Darici on eren darici

What I Listened To This Week (10/5 - 10/24)

What I Listened To This Week? (9/28 - 10/4)

Agalar, Brolar, ve Asklarim

Ismail Mert Etil M.D. - canimkarim

Ezgi Konanc - kardeshim

Idil Okten - kebabo

Curriculum Vitae

Contact

Research Interests

Education

Western Michigan University

Western Michigan University

Eskisehir Technical University

Get in Touch

Socials

Lab 1 - Introduction to Mathematical Modeling

1. Introduction to Operations Research Modeling

The OR modeling cycle

3. Model vs. Language vs. Solver

Mathematical Model (Abstract)

Lab 2 - Mathematical Programming Examples

1. Introduction

2. Cake Production Problem

Lab 3 - Assignment and Transportation Problems

1. Introduction

2. Recap: Transportation and Assignment Problems

3. Transportation Problem: Closed Form Model

Decision Variables

Parameters

Objective Function

Constraints

Supply Constraints

Demand Constraints

Non-negativity

4. Powerco Transportation Problem

Lab 4 - Assignment Problems and Shortest Path

1. Introduction

2. Assignment Problem

Open Source

Spotify Keyfinder

Saturator Plugin

Webcam Archive

October 27th, 2026

October 22th, 2026

October 20th, 2026

October 15th, 2026

October 14th, 2026

September 30th, 2026

March 3rd, 2026

January 23rd, 2026