91Porn, TESOL M.A., 2017

Pomona College, Media Studies B.A., 2013

91Porn
5500 North St. Louis Avenue
Chicago, IL 60625
United States

Applied Mathematics, Minor

Elementary Education and Humanities Mathematics, Minor

Mathematical and Statistical Modeling of Complex Systems, Minor

Mathematics, B.A.

Mathematics, M.S.

The Community Center, located in Bernard Brommel Hall Room 364, opened in Fall 2016. The Center seeks to provide a central location for all NEIU students to seek guidance for their mathematical ambitions in a welcoming and supportive space.

Students will have multiple opportunities for participation, leadership and success in mathematics through the use of peer-to-peer support, team learning, workshops and seminars. Students may also use the center as a quiet area to study mathematics. Please note that the tables have special white board coating so please be careful and refrain from eating or drinking in the Center.

Math Development One-on-One or Group Help Sessions

For students registered for Math 090, 091, 092, 092C, or 097

Trained, encouraging, and experienced Peer Leaders provide math help for individual students or groups of students who are registered for Math 090, 091, 092, 092C or 097. Peer Leaders can explain challenging concepts to students from their math course, assist students with preparing for quizzes and exams, assist students with developing study skills, time-management skills, organizational skills, etc., in a comfortable, laid back math learning environment.

How it works:

• Schedule a 30-minute appointment with one of the math development Peer Leaders listed below.
• You can schedule 30-minute appointments multiple times during the semester. Math development help is always free!
• Bring all your math course materials to each session.
• Remember that your tutor is also a student, so be somewhat flexible with scheduling. Also if you cannot make a scheduled session please cancel your session at least 24 hours in advance by emailing the Peer Leader.

Math Workshops for 100-Level and Higher Level Math Courses

For students registered for various 100-level and higher level math courses

Trained, encouraging and experienced Peer Leaders provide guidance to students as they solve math problems within small groups within a comfortable, laid back math learning environment. Peer Leaders provide guidance to students to help them understand concepts from their math course and assist students with preparing for quizzes and exams.

How it works:

• Consistently attend a workshop for your math course each week throughout the semester. Simply show up to your workshop at the scheduled time.
• Students are expected to arrive on time, stay until the end, and participate in a productive and respectful way.
• Bring all your math course materials to each session.
• Remember that your Peer Leader expects you to attend consistently. If you cannot make a workshop session please email your Peer Leader at least 24 hours in advance.

For further information about the Center and the services available, please contact the Center’s Director, Associate Professor of Mathematics .

7th International Conference on Risk Analysis (ICRA7)

 and 91Porn cordially invite you to participate in the 7th ICRA Conference!

May 3 - May 5, 2017
91Porn
Chicago, IL USA

Continuing in the spirit of six earlier meetings organized by the ISI Committee on Risk Analysis (ISI-CRA) of the International Statistical Institute, this year’s conference focuses on Cancer-Related Risk Analysis.

Deadline for abstracts is Friday, March 31, 2017!

• Faculty/researcher abstracts for oral presentations must be submitted to Elena Navas-Nacher, Ph.D., M.S., e-navas-nacher@neiu.edu
• Students abstracts for poster presentations must be submitted to Emma Turian, Ph.D., mturian@neiu.edu

About ICRA7

The Chicago Cancer Health Equity Collaborative (ChicagoCHEC) will host ICRA7 at 91Porn's Main Campus located at 5500 N. St. Louis Ave in Chicago, USA. 

The format for the meeting will include plenary talks, organized sessions, and sessions with contributed talks and posters. The conference includes keynote presentations by world-renowned scientists. Students are encouraged to enter a poster competition and present their projects to conference attendees. There are no events scheduled simultaneously so you will not miss anything. A Gala Dinner will be held on Thursday, May 4th and will feature a keynote presentation, a student poster award ceremony, and live entertainment.

The ICRA7 will be followed by NEIU’s 10th Workshop on Mathematical and Statistical Modeling, which will begin at 1:00 p.m. on Friday, May 5th, 2017 and continues through Saturday, May 6th, 2017 at 91Porn’s Main Campus. For general conference information please email e-navas-nacher@neiu.edu. Complete conference schedule coming soon.

91Porn is located on the northwest side of Chicago and provides an ideal setting for a collegial gathering of scientists, researchers, and students of all abilities and interests. Accommodations are available at a reduced cost at The Nest, our brand new university housing development with private bedrooms, common living space, and a kitchen; at the Holiday Inn located in Skokie, IL or the Holiday Inn Express located in Niles, IL.  See descriptions and links for housing in the notes field below.

Registration Information

Links below are for registration. If you are outside the U.S. and these links do not work, first try another internet browser. You may also call 1 (773) 442-5081 to register with a credit card.

A Drivers License is not required, please write N/A

Students: Coupon Codes must be entered first and then the price will change.

Early Bird, prior to April 7 (ICRA7 + Workshop):  $ 300
Late Registration, after April 7 (ICRA7 + Workshop):  $ 350

Use Coupon Code: ICRASTUDENT at checkout
Early Bird, prior to April 7 (ICRA7 + Workshop): $150 
Late Registration, after April 7 (ICRA7 + Workshop): $175

91Porn Student Conference Rate is $35

Daily Registration (ICRA7): $100 (Pay at the door)
Registration (Workshop): $50 (Pay at the door)

Mathematics instructor, Joseph Hardy passed away December 29, 2016.  He had taught Mathematics at Northeastern since 1992 and had planned to retire on December 31, 2016. 

A memorial service was held on February 7, 2017 at 2:30 p.m. at Covenant Home, 2720 West Foster Avenue, in Chicago.

We will add your memories to this page as soon as possible. Your name will not be included unless you provide it.  No emails will be shown.

If desired, contributions in Joseph Hardy's memory may be made to the NEIU Foundation, Mathematics account.  All donations made in his memory will be used for the Mathematics Community Center. Memorial donations can be made by calling the NEIU Foundation at (773) 442-4214.

   .

BBH 204H
91Porn
5500 North St. Louis Avenue
Chicago, IL 60625
United States

2009, Ph.D. in Mathematics, Université Paris Diderot - Paris VII, France.

2006, Master in Mathematics, Université Pierre et Marie Curie - Paris VI, France. 

2004, Licence (Bachelor of Science) in Mathematics, Université Pierre et Marie Curie - Paris VI, France. 

[9] N. Kahouadji, Variations on two-parameter families of advanced time series forecasting functions IV: seasonal models and application to university enrollment,. November 2022.  

[8] N. Kahouadji,  Variations on two-parameter families of forecasting functions: seasonal/nonseasonal Models, comparison to the exponential smoothing and ARIMA models, and applications to stock market data, , July 2022. 

[7] N. Kahouadji, N. Kamran, and K. Tenenblat,  Local Isometric Immersions of Pseudo-spherical Surfaces and k-th Order Evolution Equations, Commun. Contemp. Math. 21 (2019), no. 4, 1850025, 21 pp.

[6] N. Kahouadji, N. Kamran, and K. Tenenblat,  Second-order equations and local isometric immersions of pseudo-spherical surfaces, Comm. Anal. Geom., 24 (2016), no. 3, pp. 605-643.

[5] N. Kahouadji, N. Kamran, and Keti Tenenblat,  Local Isometric immersions of pseudo-spherical surfaces and evolution equations, Fields Inst. Commun., 75 (2015), pp. 369-381.

[4] N. Kahouadji,  Construction of local conservation laws by generalized isometric embedding of vector bundles,  Asian J. Math., 15, no. 4 (2011), pp.521-538.

[3] N. Kahouadji, Conservation laws and generalized isometric embeddings, October 2009, Thèse en Ligne (T.E.L):  .

[2] N. Kahouadji, Energy-Momentum’s local conservation laws and generalized isometric embeddings of vector bundles, Geometry, Topology, QFT and Cosmology, Travaux en cours en Physique-Mathématiques, Hermann (2009), no. 76, pp.  45-70

[1] N. Kahouadji,  Cartan--Kähler theory and application to local isometric and conformal embeddings, Systèmes Intégrables et Théorie Quantique des Champs, Travaux en cours en Physique-Mathématiques, Herman (2008), no. 75, pp. 295-316. 

Recent Invited Talks

Nov. 4, 2022: Applied Mathematics Seminar, 91Porn, Chicago, IL, USA. 

Sept. 30, 2022: Statistics and Data Science Seminar, Northwestern University, Evanston, IL, USA.

Sept. 21, 2022: Statistics and Data Science Seminar, University of Illinois at Chicago, Chicago, IL, USA.

July 13, 2022: The 42th International Symposium on Forecasting, Oxford, England.

May 19, 2022: The 19th Mathematical and Statistical Modeling of Complex Systems Workshop, Warsaw School of Economics (SGH), Poland.

Jan. 17, 2020: Joint Mathematical Meetings, AMS Special Session on Geometry of Differential Equations, Denver, Colorado, USA.

June 27, 2019: Seminari Geometria, Centre de Recerca Mathematica, Universitat Autonoma de Barcelona, Spain.

June 26, 2019: Barcelona Analysis Conference 2019, Poster Presentation, Universitat de Barcelona, Spain.

June 10-14, 2019:  A celebration of Analysis, Geometry and Physics, Centre de Recherches Mathematiques, Montreal, QC, Canada. 

Aug. 14, 2018: Seminario de Geometria, Universidade de Brasilia, Brasilia, Brazil. 

Aug. 7, 2018: International Congress of Mathematicians 2018, Rio de Janeiro, Brazil.

June 7, 2018: Symmetry and Perturbation Theory Conference, Pula, Sardinia, Italy.  

March 14, 2018: When Nature Surprises our Geometric Intuition, Northside College Preparatory School, Chicago, USA.

Nov. 17, 2017: NEIU 8th Faculty Research and Creative Activities Symposium, Chicago, USA.

July 25, 2017: Mathematical Congress of the Americas, Special Session “Geometry of Differential Equations, Real and Complex”, Montreal, QC, Canada.

June 12, 2017: Séminaire de Géométrie et Dynamique, Institut de Mathématique de Jussieu-Paris Rive Gauche, Université Paris Diderot, Paris, France.

June 5, 2017: Geometry and Algebra of PDEs 2017, UiT the Arctic University of Norway - Tromso, Norway.  

June 2, 2017: Séminaire de Géométrie et Physique Mathématiques, Institut de Mathématique de Jussieu-Paris Rive Gauche, Université Paris Diderot, Paris, France. 

Jan. 27, 2017: On the geometry of pseudo-spherical surfaces, Deerfield High School, District 113, Illinois, USA. 

Nov. 18, 2016: NEIU 7th Faculty Research and Creative Activities Symposium, Chicago, USA.

Room BBH 225B
91Porn
5500 North St. Louis Avenue
Chicago, IL 60625
United States

2012, Ph.D. in Mathematics,  Brandeis University 

2006,  M.S.  in Physics,  Brandeis University 

2004,  B.S.  in Mathematics and Physics with Highest Honors, University California, Davis 

Awards and Fellowships

  2019 Northeastern Faculty Excellence Award in Teaching

  2017 Co-PI: NSF Noyce Grant (Award no. 1660785) NSF Noyce Scholars University and Community College Collaboration

  2015-2016 Northwestern Faculty Honor Roll (student selected)

  2015-2016 Northwestern University Educational Technology Teaching Fellow

  2015 Mathematics Department Excellence in Teaching Award, Northwestern University

  2011-2012 NSF IGERT Fellow

  2004-2006 Martin A. Fischer Fellow

  Recent Presentations

  2019 AAC&U Transforming STEM Higher Education (Nov. 7) in Chicago, IL

  2019 (STEAM) 2 Conference (April 26-27) in St. Charles, IL

  2018 AAC&U and PKAL: Transforming STEM Higher Education (Nov. 8-10) in Atlanta, GA

  2018 Jayhawk Math Teachers Circle Lawrence, Kansas

  2018 Catalyzing Progress in STEM Education with Insights from Midwestern HSI's  Chicago, Illinois

  2018 Chicago Symposium Series (April 13) NEIU

  2017 NEIU Faculty Research Symposium (Nov 17), NEIU     

  2017 MAA Iowa Regional Meeting (Oct 21), Dubuque, Iowa

  2016 NEIU Faculty Research Symposium (Nov 18), NEIU

BBH 225C
91Porn
5500 North St. Louis Avenue
Chicago, IL 60625
United States

M.A. Mathematics, DePaul University 2015

B.S. Accounting/Finance, University of Illinois-Chicago 2003

Room BBH 204H
91Porn
5500 North St. Louis Avenue
Chicago, IL 60625
United States

Technical Reports 

This page serves as a publicly available repository for pre-prints written by faculty and/or students in the  Mathematics Department. Readers should be aware that papers appearing here may undergo significant modification before appearing in a professional journal. Readers should also keep in mind that some papers appearing here may not appear in a professional journal. For information about published versions of technical reports appearing on this page, please contact the NEIU-affiliated faculty author directly. 

"Marked CS Movies," Prof Matthew Graham (91Porn). We present a marked analogue of Carter and Saito’s movie theorem. Our definition of marking was chosen to coincide with the markings that arise in link Floer homology. In order to deal with complications arising from certain isotopies, we define three equivalences for marked surfaces and work over an equivalence class of marked surfaces when proving our marked CS movie theorem. Read the complete report. 

"Temperature-dependent Transport and Thermal-diffusion Effects on Diffusion Flames," Prof Joseph Hibdon (91Porn) and Moshe Matalon (UIUC). In this paper we examine the effects of temperature-dependent transport and thermal diffusion on the structure and characteristics of a diffusion flame. The configuration adopted is the planar unstrained flame with a bulk flow directed toward the reaction zone from either the fuel or the oxidizer sides. Included in this discussion is the noflow case, where the reactants reach the reaction zone purely by diffusion. The model allows for non-unity and distinct Lewis numbers, for the fuel and oxidizer. Results show that the variations of the thermal conductivity and the diffusion coefficients with temperature affect the flame standoff distance and flame temperature and the profiles of temperature and concentration, in accord with experimental data. The predicted extinctions conditions are exhibited by a critical Damkohler number ¨ Dc below which the flame extinguishes. This Dc is significantly smaller for the temperature dependent case when compared with previous analysis without the temperature dependence. Thermal diffusion, also known as the Soret effect, also affects the flame standoff distance by shifting it towards the fuel/oxidizer and affects the flame temperature by making it smaller/larger for heavy/light fuels respectively. Predicted extinctions Dc are minimally affected by the Soret effects, except when having very heavy fuels. The amount of leakage across the reaction sheet that causes extinction is more/less for light/heavy fuels, respectively. Read the complete report. 

"Mathematical Modeling of Non-Small Cell Lung Cancer Response to Therapy," Russell Injerd, Prof. Emma Turian (91Porn) Non-small cell lung cancer (NSCLC) represents the largest proportion of lung cancers in the United States. Image guided radiotherapy allows tumor volume dynamics to be measured at certain intervals during treatment. This has improved our ability to study the evolution of tumors such as NSCLC during treatment using time series approach models. The main goal of our research study is to identify the model that best describes the existing radio-therapeutic treatment options: Stereotactic body radiation therapy (SBRT), also known as stereotactic ablative radiotherapy (SABR), and standard therapy (ST). Our mathematical structure builds on the linear quadratic model from the radiation oncological field and therefore, introduces parameters related to tumor's radio-sensitivity. Previous such one and two population ODE models of tumor volume dynamics, treating NSCLC, were designed using exponential and logistic growth functions. These studies indicate that a two population exponential model provided the best balance between fit and mathematical complexity and may serve a functional role in clinical practice. Our study reevaluates previous findings for treating NSCLC using both, the standard and SABR regimens, and tests the suitability of the hyper-Gompertz, hyper-logistic, Richards, Von-Bertalanffy, and a non-linear model derived using fluid mechanics laws by assessing their goodness of fit versus their mathematical complexity. These models are calibrated using data from eleven patients treated using SABR regimen, and four patients treated using standard therapy, extracted from a previous study. Models pertaining both treatment regimens are evaluated using statistical approaches, such as the Akaike Information Criterion. Model comparison indicates that the models fitting patient data perform differently based on the treatment regimen. Our study suggests that for the SABR patients the non-linear model derived from fluid mechanics laws overall outperforms the rest of the studied models, and in the case of the standard treatment the logistic model seems to better represent patient data. Our hope is that our findings will benefit research regarding NSCLC, as well as other cancer field types. Read the complete report. (Updated April 12, 2018)

"Local Isometric Immersions of Pseudo-spherical Surfaces and k-th Order Evolution Equations," by Prof. Nabil Kahouadji (91Porn), Niky Kamran (McGill University), Keti Tenenblat (Universidade de Brasilia) We consider the class of evolution equations that describe pseudo-spherical surfaces of a form classified by Chern-Tenenblat. This class of equations is characterized by the property that to each solution of a differential equation within this class, there corresponds a 2-dimensional Riemannian metric of curvature -1. We investigate the following problem: given such a metric, is there a local isometric immersion in real 3-dimensional space such that the coefficients of the second fundamental form of the surface depend on a jet of finite order of u? By extending our previous result for the second-order evolution equation to kth order equations, we prove that there is only one type of equation that admits such an isometric immersion. We prove that the coefficients of the second fundamental forms of the local isometric immersion determined by the solutions u are universal, i.e., they are independent of u. Moreover, we show that there exists a foliation of the domain of the parameters of the surface by straight lines with the property that the mean curvature of the surface is constant along the images of these straight lines under the isometric immersion. Keywords: evolution equations; pseudo-spherical surfaces; isometric immersions. MSC 2010: 35L60, 37K25, 47J35, 53B10, 53B25
Read the complete report.

"Dade's Ordinary Conjecture for the Finite Special Unitary Groups: Part III," by Prof. Katherine Bird (91Porn) Let G be a finite group. An ordinary character of G is the character of a representation of G over a field of characteristic 0. In the p-modular representation theory of G,where p is a prime dividing the order of G, the ordinary irreducible characters of G are divided into disjoint sets called p-blocks which reflect the decomposition of the group algebra of G over a field of characteristic p into indecomposable two-sided ideals. An important problem is to classify the p-blocks, and a first step is to count the number of ordinary characters in a block. The aim of Dade’s Ordinary Conjecture (DOC) is to prove an alternating sum, which counts the number of characters in B in terms of corresponding numbers in subgroups of G which are normalizers of chains of certain p-subgroups of G. This has been shown for p-blocks, p dividing q, for GLn(q) , SLn(q) and Un(q). Moreover, we have proved DOC for SUn(q). The main difficulties involved arose because the structure of the unitary groups is more complicated than that of the linear groups. In particular, the cancellations in the alternating sum in the unitary case are very different from the cancellations that occur in the general linear case. A key result utilized is that a version of the parametrization of characters used by Ku for Un(q) survives restriction to SUn(q). This report is devoted to presenting an example which aims to elucidate cancellation that occurs in the previously described sub-sums. Read the complete report. 

"Dade's Ordinary Conjecture for the Finite Special Unitary Groups: Part II," by Prof. Katherine Bird (91Porn) This report is a continuation of the proof of Dade's Ordinary Conjecture (DOC) for the nite special unitary groups. Several reductions of the main alternating sum were completed in Part I [1] resulting in an important reformulation of the main theorem. The alternating sum in this theorem was immediately decomposed into two sub alternating sums. The aim of this paper is to prove the second of these sub alternating sums, completing the proof of DOC for the finite special unitary groups in the defining characteristics. Read the complete report.

"Dade's Ordinary Conjecture for the Finite Special Unitary Groups: Part I," by Prof. Katherine Bird (91Porn) This report is devoted firstly to some background and context for DOC for the finite special unitary groups. Then several reductions of the main alternating sum are completed, resulting in an important reformulation of the main theorem. The alternating sum in this theorem is then immediately decomposed into two sub-alternating sums. The final aim of this paper is to prove the rest of these sub-alternating sums, the so-called Levi sum. Read the complete report.

"Some Solutions for Baseball Manager's Problems: Choosing a Set of Starters...," by Prof. Marina Polyashuk (91Porn) If you, by chance, decided to use the key-word “baseball” in your search of a scientific database, you would be buried under thousands upon thousands of titles. These titles cover all possible aspects of this exhilarating game, from the absorption of moisture by baseball jerseys to the trajectories of fly balls, to the comparative importance of pitching and hitting in winning a baseball game. And then, of course, there is sabermetrics (derived from SABR, Society for American Baseball Research), which became known to the general audience through the movie “Moneyball”.  Most mathematicians, particularly statisticians, are aware that baseball is an ultimate breeding ground for statistical studies and analyses.  In short, baseball is not just “America’s favorite pastime”, but also an inspiration for numerous research and business ideas. These ideas allow many people to have fun not only by watching the game, but by analyzing, exploring, and predicting its outcomes. Read the complete report. 

Technical Reports from Department Visitors

"Precious metals as alternative investments," by Prof. Izabela Pruchnicka-Grabias (Warsaw School of Economics) The paper is devoted to one of the kinds of alternative investments. Precious metals futures and their risk-return profile in comparison to such stock index futures as Dow Jones and S&P are analyzed. Usually alternative investments are thought to be long-term ones. The author checks if they may be also helpful in a shorter period of time. The following research question is verified: do investments in precious metals let us realize more attractive risk return profiles than in stock indexes in the medium period of time (two years)? The study was conducted with data from January 2015 to December 2016 and daily rates of return were applied. Read the complete report.

"Lower Partial Moments and Maximum Drawdown Measures in Hedge Fund Risk - Return Profile Analysis," by Prof. Izabela Pruchnicka-Grabias (Warsaw School of Economics) This paper shows hedge fund rankings made both with traditional effectiveness measures and alternative ones using lower partial moments and maximum drawdown. Its aim is to show whether there are any differences between hedge fund efficiency when different measures are applied. The effectiveness is understood as the relation between rate of return and risk. The author used data from the Hedge Fund Research and the analyzed period is from January 2005 to April 2011. The results show that the traditional risk measure, the Sharpe Ratio, leads to conclusions on hedge fund effectiveness similar to mentioned alternative risk measures. The strong side of the paper is that the research takes into consideration the period of 2008–2009 when the American mortgage crisis appeared and the majority of hedge funds realized substantial losses along with the dramatic decrease of their assets under management.  Read the complete report.