Intelligent purchasing : How artificial intelligence can redefine the purchasing function

Artificial intelligence (AI) can affect all of a company's functions, not least the purchasing department. In addition to automating and optimizing existing processes, AI opens up new opportunities for purchasers to undertake new, strategic, collaborative, enduring missions. AI enables complex, strategic decision-making in an unpredictable, hostile environment. This article analyzes to what extent AI can improve the performance of the purchasing department. First, a review is undertaken of how AI is used in purchasing. Thereafter, the research follows an exploratory, inductive, and qualitative approach based on a multiple case study of the following technologies: (1) the Synertrade automated international purchasing system; (2) the Silex matching system; (3) SAP Ariba decision support; (4) Jaggaer supplier relations management; and (5) the Ideapoke collaborative ideation and innovative project management platform. The present study's contributions lie in its redefinition of the purchasing function, of the purchaser's role, of supplier relationship management policy, and of interdepartmental collaboration, involving, for example, Marketing and R

Exploiting hybrid parallelism in the kinematic analysis of multibody systems based on group equations

Computational kinematics is a fundamental tool for the design, simulation, control, optimization and dynamic analysis of multibody systems. The analysis of complex multibody systems and the need for real time solutions requires the development of kinematic and dynamic formulations that reduces computational cost, the selection and efficient use of the most appropriated solvers and the exploiting of all the computer resources using parallel computing techniques. The topological approach based on group equations and natural coordinates reduces the computation time in comparison with well-known global formulations and enables the use of parallelism techniques which can be applied at different levels: simultaneous solution of equations, use of multithreading routines, or a combination of both. This paper studies and compares these topological formulation and parallel techniques to ascertain which combination performs better in two applications. The first application uses dedicated systems for the real time control of small multibody systems, defined by a few number of equations and small linear systems, so shared-memory parallelism in combination with linear algebra routines is analyzed in a small multicore and in Raspberry Pi. The control of a Stewart platform is used as a case study. The second application studies large multibody systems in which the kinematic analysis must be performed several times during the design of multibody systems. A simulator which allows us to control the formulation, the solver, the parallel techniques and size of the problem has been developed and tested in more powerful computational systems with larger multicores and GPU.This work was supported by the Spanish MINECO, as well as European Commission FEDER funds, under grant TIN2015-66972-C5-3-

Sentiment Analysis of Twitter in Tourism Destinations

[EN] Given the importance of electronic word of mouth (eWOM), this paper analyses the content of messages generated by users related to a tourist destination and shared through Twitter. We propose three research questions regarding eWOM behaviour in Twitter focused on the expertise of the reviewer, sentiment analysis of a tweet and its content.In order to address those research questions we carry out text mining analysis by retrieving existing information on Twitter (over 1500 tweets) regarding to Venice as a tourist destination.Authors acknowledge financial support of research project UV-INV_AE19-1212255.Perez Cabañero, C.; Bigne, E.; Ruiz Mafe, C.; Cuenca, AC. (2020). Sentiment Analysis of Twitter in Tourism Destinations. Editorial Universitat Politècnica de València. 181-189. https://doi.org/10.4995/CARMA2020.2020.11621OCS18118

Five decades of corporate entrepreneurship research : measuring and mapping the field

Research on corporate entrepreneurship venturing activities by established corporations has received increasing scholarly attention. We employ bibliometric methods to analyze the literature on corporate entrepreneurship published over the last five decades. Based on the results of citation and co-citation analyses, we reveal central works in the field and how they are interconnected. We investigate the underlying intellectual structure of the field. Our findings provide evidence of the growing maturity and interdisciplinarity of corporate entrepreneurship and provide insight into research themes. We find that resource-based view and its extensions still remain the predominant theoretical perspectives in the field. Drawing on these findings, we suggest directions for future research

Sexual Dysfunction and Quality of Life in Patients with Hidradenitis Suppurativa and Their Partners

Hidradenitis suppurativa (HS) is a chronic skin disease that profoundly affects patients’ quality of life (QoL) and sexuality. Few data are available on the impact of HS on patients’ partners. We aimed to explore the QoL and sexual function of patients’ partners and the factors associated with their impairment and to compare the QoL and sexual function of single patients and those in a stable relationship. We conducted a cross-sectional study at Hospital Universitario Virgen de las Nieves (Granada, Spain) and at theWroclaw Medical University (Wroclaw, Poland). Patients over the age of 16 years attending their scheduled follow-up and their partners, if any, were included. The Dermatology Life Quality Index (DLQI) and the Family Dermatology Life Quality Index (FDLQI) were used to estimate the QoL of patients and partners, respectively. The FSFI-6 was used to determine sexual dysfunction in women and the IIEF-5 for erectile dysfunction in men. Thirty-four single patients and twenty-eight patients in a stable relationship and their partners were included. Patients had a very large impact (DLQI 12.5 7.5) and their partners a moderate impact (FDLQI 10.3 7.1) in their QoL due to HS. Women with HS had a high prevalence of sexual dysfunction (13/32, 40.6%) and men of erectile dysfunction (19/30, 63.3%). Male partners also had a high prevalence of erectile dysfunction (10/17, 58.8%), while only one female partner had sexual dysfunction (1/11, 9.1%). Factors related to disease severity, intensity of symptoms and body mass index were associated with poorer QoL in partners and time of disease evolution with greater erectile dysfunction in male partners. In conclusion, HS not only profoundly affects the QoL and sexuality of patients but also of their partners. Several risk factors have been identified, which should be taken into account in the holistic approach of the disease

Dermatology Care in Spanish Public Hospitals: A Mapping Study of Health Care Resources and Medical and Surgical Activity in Dermatology Departments in 2019

Antecedentes y objetivo: No existen datos actualizados sobre los recursos asistenciales ni la actividad médico-quirúrgica de los servicios de dermatología espa˜noles. El objetivo de esta investigación es conocer la situación y actividad de dichos servicios durante el a˜no 2019. Material y métodos: Estudio transversal mediante cuestionario online distribuido a los jefes de servicio de dermatología de hospitales públicos espa˜noles. Resultados: De los 162 jefes de servicio encuestados, se obtuvo una participación del 36,4% (59/162). Se observó un déficit de personal generalizado, especialmente de dermatólogos en hospitales de complejidad media-baja. La principal causa del déficit de dermatólogos fue la ausencia de profesionales interesados. Las infraestructuras y equipamiento disponibles fueron superiores en los grandes complejos hospitalarios. La atención mixta presencial-telemática estuvo presente en más de la mitad de los centros. En el ámbito de las consultas monográficas, la de psoriasis fue la más implementada. Aproximadamente el 75% de los centros contaron con quirófanos con anestesista. Procedimientos quirúrgicos de mayor complejidad como la biopsia selectiva de ganglio centinela o la cirugía de Mohs se realizaban con mayor frecuencia en los grandes complejos hospitalarios. La hospitalización de pacientes y la presencia de dermatólogos residentes de guardia fueron igualmente más habituales en estos hospitales. La actividad docente e investigadora también se relacionó con la complejidad del hospital. Conclusiones: Nuestros resultados describen la situación de los servicios de dermatologíaespa˜noles justo antes de la pandemia por COVID-19, y pueden ser útiles para la gestión clínicay para definir líneas de trabajo y áreas de mejora.Background and objective: No recent data on health care resources and medical and surgical activity in Spanish dermatology departments are available in the literature. The aim of this study was to compile this information for 2019. Material and methods: Cross-sectional study based on an online survey sent to the heads of dermatology departments at public hospitals in Spain. Results: Of the 162 department heads contacted, 59 answered the survey (participation rate, 36.4%). General findings included a shortage of staff, especially dermatologists, in hospitals of low and medium complexity. The main reason given for the shortage of dermatologists was a lack of interested applicants. Large hospital complexes had more infrastructure and equipment. Over 50% of the departments surveyed used a combination of in-person and virtual visits. Psoriasis units were the most common specialized care units. Approximately 75% of the hospitals had operating rooms with an anesthetist. More complex procedures such as sentinel lymph node biopsy and Mohs micrographic surgery were performed more often in large hospital complexes. Hospitalization and the presence of dermatology residents working call shifts were also more common in these hospitals. Teaching and research activity differed according to hospital complexity. Conclusions: We have mapped health care resource availability and medical and surgical activity in Spanish dermatology departments prior to the COVID-19 pandemic. Our findings could be useful for improving clinical management and defining future actions and areas for improvement

Impact of the COVID-19 Pandemic on the Diagnosis and Prognosis of Melanoma

Background: Early detection of melanoma is one of the main diagnostic goals of dermatologists worldwide, due to the increasing incidence of the disease in our environment. However, the irruption of the SARS-CoV-2 pandemic has posed a challenge to global healthcare, forcing systems to focus their resources on the fight against COVID-19. Methods: Retrospective cohort study. The exposed cohort were patients diagnosed with melanoma in the year after the general confinement in Spain (15 March 2020) and the unexposed cohort were patients with melanoma diagnosed in the previous year. Results: 130 patients were included. No differences were observed between demographic characteristics in both cohorts. The mean Breslow of melanoma before the onset of the pandemic was 1.08, increasing to 2.65 in the year after the onset of the pandemic (p < 0.001). On the other hand, the percentage of melanomas in situ decreased from 38.96% to 16.98% in the year after the declaration of the state of alarm in Spain. Conclusions: The SARS-CoV-2 outbreak has led to a reduction in the early diagnosis of melanoma, with an increase in invasive melanomas with poor prognosis histological factors. This could lead to an increase in melanoma-related mortality in the coming years in our environment

The Burden of Hidradenitis Suppurativa Signs and Symptoms in Quality of Life: Systematic Review and Meta-Analysis

Hidradenitis suppurativa (HS) is a chronic, recurrent and debilitating inflammatory skin disease of the hair follicle that usually presents as painful, deep-seated inflamed lesions in the apocrine gland-bearing areas of the body. HS patients suffer from uncomfortable signs and symptoms, such as pain, pruritus, malodour and suppuration, which may impair patients’ quality of life (QoL). Although HS patients frequently experience these signs and symptoms, they are only occasionally assessed by clinicians and, unexpectedly, the scientific evidence available is limited and heterogeneous. The aim of this study is to summarize the evidence regarding the impact of HS signs and symptoms on QoL to serve as a basis for future research and help clinicians to consider them in the daily care of HS patients. A systematic review and meta-analysis were conducted following PRISMA Guidelines. The following search algorithm was used: (hidradenitis or “acne inversa”) and (pain or itch or odour or malodour or suppuration or oozing or drainage) and (“quality of life”). The literature search identified 836 references, 17 of them met the eligible criteria and were included for analysis, representing 4929 HS patients. Mean age of the participants was 36.28 years and there was a predominance of female sex among study participants. The BMI of the population was in the range of over-weight and about two out five patients were active smokers. Studies included patients with mild to moderate HS, with a mean disease duration of 13.69 years. The HS signs and symptoms assessed were pain, pruritus, malodour and suppuration. Overall, the higher intensity of a sign or symptom correlated with poorer general QoL or specific QoL dimensions including sexual distress, anxiety, depression and sleep. The most frequently employed tool to assess QoL was the Dermatology Life Quality Index (DLQI). DLQI was used in 52.9% of the studies (9/17) with a mean value of 10.70 (2.16 SD). The scores employed to assess signs and symptoms severity were subjective and varied between studies, being the numerical rating scale (NRS) for each of the most used symptoms. The mean NRS value for pain was 3.99 and the mean NRS for pruritus was 4.99. In conclusion, we have summarized, categorized and analyzed the scientific evidence regarding signs and symptoms in HS patients and their impairment in QoL. Their assessment should be thorough and included during routine evaluation of HS patients to motivate therapeutic modifications and increase patients’ health

Recensiones [Revista de Historia Económica Año XII Primavera-Verano 1994 n. 2 pp. 437-472]

Editada en la Universidad Carlos IIIRobert C. Allen. Enclosure and the Yeoman. The Agricultural Development of the SouthMidlands 1410-1850 (Por Gaspar Feliú).-- Ruggiero Romano. Conjonctures opposées. La «crise» du XVII siècle: en Europe et en Amérique ibérique (Por Gaspar Feliú).-- Simposio de Historia de las Mentalidades. Instituto Nacional de Antropología e Historia, México. Familia y poder en Nueva España (Por Juan Carlos Sola Corbacho).-- Leandro Prados de la Escosura y Samuel Amaral (Eds.). La independencia americana: consecuencias económicas (Por Javier Cuenca).-- M.ª Cruz Romeo Mateo. Entre el orden y la revolución. La formación de la burguesía liberal en la crisis de la monarquía absoluta (1814-1833) (Por Ricardo Robledo).-- José G. Cayuela Fernández. Bahía de ultramar. España y Cuba en el siglo XIX. El control de las relaciones coloniales (Por Candelaria Sáiz Pastor).-- José Manuel Pose Antelo. La economía y la sociedad compostelanas a finales del siglo XIX (Por Carlos Larrinaga Rodríguez).-- Frank Broeze. Mr Brooks and the Australian Trade. Imperial Business in the Nineteenth Century (Por Jesús M.ª Valdaliso).-- Robert H. Bremner. Desde lo más bajo. El descubrimiento de la pobreza en Estados Unidos / James T. Patterson. La lucha contra la pobreza en los Estados Unidos de América, 1900-1985 (Por Nuria Puig).-- Justo Navarro Clari. Curso de Historia Económica (Por Antonio Santamaría)Publicad