Polynomial equations with one catalytic variable, algebraic series, and map enumeration

Let $F(t,u)\equiv F(u)$ be a formal power series in $t$ with polynomial coefficients in $u$. Let $F\_1, ..., F\_k$ be $k$ formal power series in $t$, independent of $u$. Assume all these series are characterized by a polynomial equation $$P(F(u), F\_1, ..., F\_k, t, u)=0.$$ We prove that, under a mild hypothesis on the form of this equation, these $(k+1)$ series are algebraic, and we give a strategy to compute a polynomial equation for each of them. This strategy generalizes the so-called kernel method, and quadratic method, which apply respectively to equations that are linear and quadratic in $F(u)$. Applications include the solution of numerous map enumeration problems, among which the hard-particle model on general planar maps

Studi Tentang Pemanfaatan Software Manajemen Konstruksi Oleh Kontraktor Di Banjarmasin

Proses pengadaan bangunan secara tradisional (tradisional building procurement system) terdiri dari tahap pelelangan, tahap pelaksanaan dan tahap evaluasi. Setiap tahapan tersebut adalah berupa tindakan manajerial yang memerlukan banyak perhitungan, perencanaan dan pertimbangan. Para pengembang perangkat lunak membuat bermacam-macam perangkat lunak agar dapat membantu mempermudah dan mempercepat setiap kegiatan.Tujuan penelitian ini adalah untuk mempelajari sejauh mana kontraktor-kontraktor di Banjarmasin memanfaatkan perangkat lunak manajemen kontruksi dalam menjalankan bisnis kontruksi yang kemudian dihubungkan dengan kinerja mereka.Penelitian ini terdiri dari 5 tahap yaitu tahap studi literatur, interview pada kontraktor tentang komputerisasi Perusahaan, pengumpulan data tentang kinerja setiap kontraktor, analisis data dan pengambilan kesimpulan.Beberapa hal yang dapat ditarik dari penelitian ini adalah :Jumlah komputer yang dipakai sedikit (rata-rata 3,1 unit/kontraktor)Jenis paket yang dipakai adalah jenis yang umum seperti word, Excel dan Lotus,Sedikit sekali kontraktor yang memakai komputer untuk menggambar

Gradual disaggregation of the casein micelle improves its emulsifying capacity and decreases the stability of dairy emulsions

The casein micelle is a highly aggregated colloid consisting of phosphoproteins and minerals, in particular calcium and phosphate. Its properties are affected by physico-chemical changes which provide possibilities for the development of new casein aggregates (CAs) with novel functionalities. The aim of this study was to investigate the emulsifying and emulsion-stabilizing capacity of gradually demineralized CAs in model dairy emulsions. Tri sodium citrate (TSC) was used to remove calcium and inorganic phosphate from pure casein micelles in order to produce four suspensions of differently demineralized CAs. Two types of milkfat-in-suspension (30:70 v/v) emulsions were then prepared to study the emulsifying and emulsion-stabilizing capacity of these CAs separately. Casein micelles were progressively demineralized (from 24 to 81% calcium reduction) and dissociated with the increase in TSC concentration. Three distinct populations of particles (micelle-like aggregates, sodium caseinate-like aggregates and casein monomers) were present in every suspension in different proportions. The smaller CAs had better emulsifying capacity and similar surface activity according to interfacial studies. The state of aggregation of the CAs was thus the main factor that controlled their emulsifying capacity. However, the emulsions formed with these smaller aggregates were less stable against creaming and flocculation, but still resisted coalescence under our storage conditions (21 days at 50 °C). The properties of the interfacial casein layers did not depend on the aggregation state of the CAs used to form the emulsions. The differences in instability were attributed to the nature of the non-adsorbed CAs and storage conditions

Rapport d\u27analyse ­ Enquête : Les données de la recherche à l\u27université ParisSaclay, panorama et perspectives

Cette enquête, proposée par l’ensemble du réseau des bibliothèques et centres de documentation et le Comité de pilotage de la Science Ouverte de l’Université Paris-Saclay en 2021, s’inscrit dans un contexte dynamique de Science Ouverte prônant l’obligation de publication des données de la recherche selon les principes FAIR (Facilement trouvable, Accessible, Interopérable, Réutilisable)