Stefan Schneider

• Doctor of Philosophy
• Scientific collaborator at University of Geneva

Switching from individual fossil fuel boilers to a district heating network not only allows the reduction of CO 2 emissions but may also lead to significant reduction of other air pollutants such as SO 2 , NO x and PMx, which have well known negative effects on the human health. EvalCADair makes it possible to estimate the annual evolution of the e...

This study quantifies the annual energy-related retrofit rate of the Geneva building stock (1.7%), based on data concerning the delivered construction permits over the 2010 – 2018 period. By cross-cutting with final energy demand before and after retrofit, we derive an energy-efficient retrofit rate (0.6% for an improvement of 1 class at least, 0.2...

The eco-district “Les Vergers”, located in Meyrin (Geneva, Switzerland), hosts around 1’350 dwellings and some activities. It is heated by a 5 MW th geothermal centralized heat pump. This study proposes a detailed analysis of the thermal demand of 23 selected buildings in this district as a representative panel of buildings meeting high swiss energ...

This paper presents a bottom up model simulating the hourly heat demand load curve for space heating and domestic hot water production for Swiss buildings listed in the national building and dwelling register. The model was calibrated on the actual heat demand load curves of several building types and predicts the demand as function of external tem...

In the present paper, we develop an hourly simulation model for determination of the relevant system load curves of a new district of 30 high performance multi-family buildings (163’00 m2 heated floor area) situated in Geneva, which is equipped with a 5 MWth groundwater HP. As a complement, at building level, heat recovery on exhaust air is used fo...

In this study, the Swiss residential building stock model (SwissRes model) is used to conduct a geospatial analysis of the techno-economic potential of deep building envelope retrofit packages in Switzerland. Element and building characteristics of 8242 archetype buildings are combined with high-resolution spatio-temporal weather data. We estimate...

This paper presents a bottom up model simulating the hourly heat demand load curve for space heating and domestic hot water production for Swiss buildings listed in the national building and dwelling register. The model was calibrated on the actual heat demand load curves of several building types and predicts the demand as function of external tem...

This paper presents a tool allowing for characterization of heat, electricity and cooling demand for any portion of the territory of the Canton of Geneva (Switzerland). This project is conducted in cooperation with the local energy utility company Services Industriels de Genève and its final goal is to offer to all stakeholders a uniform spatio-tem...

Reducing space heating demand from the residential building stock has been established as a crucial element of the energy transition across Europe. Focusing on Switzerland, this paper presents a bottom-up model (SwissRes) which allows to analyse the demand for space heating by building element and by building archetype (54 archetypes in total). The...

This article covers a comparative analysis of the potentials and constraints of different heat sources (air, geothermal boreholes, lake, river, groundwater and solar thermal) exploited by HP systems, implemented in various types of multifamily buildings (MFB) – new, retrofitted and non-retrofitted – which correspond to real case studies situated in...

Arlequin ver 3.0 is a software package integrating several basic and advanced methods for population genetics data analysis, like the computation of standard genetic diversity indices, the estimation of allele and haplotype frequencies, tests of departure from linkage equilibrium, departure from selective neutrality and demographic equilibrium, est...

This paper focuses on the characterization of the energy demand and the locally available renewable resources for an existing and dense urban district. Objective is setting up an integrated spatio-temporal database, for the evaluation of diverse strategies concerning the integration of renewables in the existing urban fabric. In a first step, the v...

In 2015, space heating and domestic hot water production accounted for around 40% of the Swiss final energy consumption. Reaching the goals of the 2050 energy strategy will require significantly reducing this share despite the growing building stock. Renewables are numerous but subject to spatial–temporal constraints. Territorial planning of energy...

One of the strategies for decarbonizing the energy mix is to increase the use of district heat networks, for distribution of waste heat or heat produced by renewable energy sources. However, planning such networks needs a geo-dependent energy database concerning demand and supply, incorporating their dependency on space and time. The present paper...

Arlequin ver 3.0 is a software package integrating several basic and advanced methods for population genetics data analysis, like the computation of standard genetic diversity indices, the estimation of allele and haplotype frequencies, tests of departure from linkage equilibrium, departure from selective neutrality and demographic equilibrium, est...

We present a new approach for defining groups of populations that are geographically homogeneous and maximally differentiated from each other. As a by-product, it also leads to the identification of genetic barriers between these groups. The method is based on a simulated annealing procedure that aims to maximize the proportion of total genetic var...

La genetique des populations humaines se propose, a partir de l'etude de la variabilite genetique de notre espece, de reconstituer l'histoire des humains modernes,depuis leurs origines jusqu'a nos jours. Pour construire, completer ou valider les scenarios de peuplement que ses outils lui permettent de tester ou de proposer, le geneticien s'adresse...

Recent and independent progresses achieved in population genetics and historical linguistics led to the comparison of their results on the origins and migrations of modern humans. Here we present and discuss several studies that show evidence for a strong link between genetic and linguistic differentiation among human populations at the continental...

We present here a quantitative way to assess the impact of language-family boundaries on population differentiation and to evaluate the homogeneity of the genetic processes along these boundaries. Our estimator (delta a) of the impact of the boundary is based on an isolation by distance (IBD) model and measures the added genetic distance between po...

A sample of 100 individuals from 50 French families of known pedigrees were typed for 14 loci of the HLA region (DPB1, DQB1, DQA1, DRB1, DRB3, 4, 5, C4B, C4A, Bf, C2, TNFa, TNFb, B, Cw, A). Linkage disequilibrium in each pair of loci was investigated by an exact test using a Markov chain algorithm. The results indicate no disequilibrium between DPB...

The mitochondrial DNA diversity of 62 human population samples was examined for potential signals of population expansions. Stepwise expansion times were estimated by taking into account heterogeneity of mutation rates among sites. Assuming an mtDNA divergence rate of 33% per million years, most populations show signals of Pleistocene expansions at...

Distributions of pairwise differences often called "mismatch distributions" have been extensively used to estimate the demographic parameters of past population expansions. However, these estimations relied on the assumption that all mutations occurring in the ancestry of a pair of genes lead to observable differences (the infinite-sites model). Th...

Many numerical methods used to solve ordinary differential equations or differential-algebraic equations can be written as general linear methods. The purpose of this paper is to extend the known convergence results for Runge-Kutta and linear multistep methods to a large class of new promising numerical schemes. The theoretical results are illustra...

Recently Ch. Lubich proved convergence results for Runge-Kutta methods applied to stiff mechanical systems. The present paper discusses the new ideas necessary to extend these results to general linear methods, in particular BDF and multistep Runge-Kutta methods.

Many numerical methods used to solve Ordinary Differential Equations, or Differential Algebraic Equations can be written as general linear methods. The B-convergence results for general linear methods are for algebraically stable methods, and therefore useless for nearly A-stable methods. The purpose of this paper is to show convergence for singula...

This paper describes an implementation of multistep collocation methods, which are applicable to stiff differential problems, singular perturbation problems, and D.A.E.s of index 1 and 2. These methods generalize one-step implicit Runge-Kutta methods as well as multistep one-stage BDF methods. We give numerical comparisons of our code with two repr...