Perfect State Transfer in Laplacian Quantum Walk

For a graph $G$ and a related symmetric matrix $M$, the continuous-time quantum walk on $G$ relative to $M$ is defined as the unitary matrix $U(t) = \exp(-itM)$, where $t$ varies over the reals. Perfect state transfer occurs between vertices $u$ and $v$ at time $\tau$ if the $(u,v)$-entry of $U(\tau)$ has unit magnitude. This paper studies quantum walks relative to graph Laplacians. Some main observations include the following closure properties for perfect state transfer: (1) If a $n$-vertex graph has perfect state transfer at time $\tau$ relative to the Laplacian, then so does its complement if $n\tau$ is an integer multiple of $2\pi$. As a corollary, the double cone over any $m$-vertex graph has perfect state transfer relative to the Laplacian if and only if $m \equiv 2 \pmod{4}$. This was previously known for a double cone over a clique (S. Bose, A. Casaccino, S. Mancini, S. Severini, Int. J. Quant. Inf., 7:11, 2009). (2) If a graph $G$ has perfect state transfer at time $\tau$ relative to the normalized Laplacian, then so does the weak product $G \times H$ if for any normalized Laplacian eigenvalues $\lambda$ of $G$ and $\mu$ of $H$, we have $\mu(\lambda-1)\tau$ is an integer multiple of $2\pi$. As a corollary, a weak product of $P_{3}$ with an even clique or an odd cube has perfect state transfer relative to the normalized Laplacian. It was known earlier that a weak product of a circulant with odd integer eigenvalues and an even cube or a Cartesian power of $P_{3}$ has perfect state transfer relative to the adjacency matrix. As for negative results, no path with four vertices or more has antipodal perfect state transfer relative to the normalized Laplacian. This almost matches the state of affairs under the adjacency matrix (C. Godsil, Discrete Math., 312:1, 2011).Comment: 26 pages, 5 figures, 1 tabl

Efectos del tratamiento con ácido fosfórico y calor sobre el aprovechamiento ruminal e intestinal del guisante de primavera

La protección de proteínas frente a la degradación ruminal mediante el tratamiento sucesivo con soluciones ácidas y calor se ha demostrado como un método eficaz para aumentar el valor proteico de alimentos muy degradables como la harina de girasol (Arroyo y González, 2009). En este trabajo se ha pretendido comprobar la eficacia de este tratamiento en otro alimento altamente degradable como es el guisante de primavera

Estrategia pedagógica como modelo de intercambio de conocimientos entre la Estación Experimental –FAREM Estelí y la comunidad El Limón sobre el uso y manejo de los recursos naturales para la adaptación al cambio climático

En el contexto actual del clima es sumamente necesario contar con una estrategia pedagógica como modelo para el intercambio entre las universidades y las comunidades rurales para construir procesos conjuntos para la adaptación al cambio climático. En este sentido significa una herramienta de gran valor en materia educativa porque estimula el aprendizaje en una combinación teórica - práctica con miras a disminuir la vulnerabilidad de la población. El calentamiento global actual nos exige asumir con responsabilidad la modificación de nuestros patrones de conducta en el uso de los pocos recursos que aún disponemos y que de seguir actuando de manera irracional nos conducirá a la extinción de la vida en el planeta. En ese ámbito es necesario crear prácticas pedagógicas innovadoras, con impacto en los aprendizajes y que consideren las características propias de cada entorno; que a la vez sea integradora que involucre a todos los actores. Esta propuesta pedagógica constituye una estrategia destinada a fortalecer el intercambio ya establecido entre la Facultad Regional Multidisciplinaria y la Comunidad El Limón, para movilizar a todos los actores en una dinámica de intercambio que disponga a la Casa de estudios y los pobladores en un aprendizaje mutuo a que aprendan a aprender, afianzar sus conocimientos, desarrollar destrezas y habilidades; la construcción de un trabajo colaborativo y resolutivo reconocer los valores y potencialidades de la vida rural para que les permita una inserción proactiva, tanto en la continuidad educativa como en la vida laboral y su entorno para la adaptación al cambio climático

Individual Values and Job Satisfaction as Work Engagement Predictors: Example from Croatia

This paper examines the relationship between work engagement, employees’ individual values, and job satisfaction. Specifically, it explores if job satisfaction and individual values can be considered as predictors of employees’ engagement at work. The empirical research was carried out in 2023, involving a sample of 277 Croatian employees. The research hypotheses were tested using hierarchical regression analysis. Statistical analysis revealed that job satisfaction is the most significant predictor of work engagement. The findings suggested that individual values influence employee work engagement, but not all values contribute equally. Among the ten observed individual values, universalism, power, benevolence, and achievement were confirmed as statistically significant predictors of work engagement. Research results suggested that management should prioritize job satisfaction to improve employee engagement. In their attempts to enhance work engagement, management should also pay attention to employees’ individual values since some have been confirmed as the determinant of work engagement

Perbandingan Metode Evaluasi Usability antara Heuristic Evaluation dan Cognitive Walkthrough serta Rekomendasi Desain Pada Aplikasi Teman Bus

Teman Bus merupakan implementasi program Buy the Service dari Kementerian Perhubungan Republik Indonesia untuk pengembangan angkutan umum di kawasan perkotaan. Setelah dilakukn observasi kepada 100 responden, ditemukan bahwa masih banyak pengguna yang kurang nyaman menggunaan aplikasi, sulit menemukan rute tujuan, memesan bus, serta tampilan yang susah dimengerti. Tujuan dari penelitian ini adalah membandingkan evaluasi usability antara Heuristic Evaluation dan Cognitive Walkthrough pada aplikasi Teman Bus untuk memenukan metode yang efektif dalam menemukan masalah berdasarkan aspek masalah usability dan hasil perbandingan saat evaluasi pertama dilakukan dengan evaluasi kedua setelah diberikan rekomendasi desain. Setelah diberikan rekomendasi desain yang dirancangan menggunakan metode Task Centered Design System (TCSD) hasil evaluasi usability mengalami peningkatan nilai akhir severity rating. Hal ini menunjukkan bahwa dalam perolehan masalah saat evaluasi usability dan peningkatan nilai akhir severity rating, metode Heuristic Evaluation lebih dalam melakukan evaluasi yang dilakukan pada objek aplikasi Teman Bus. Kata kunci— Usability, Heuristic Evaluation, Cognitve Walkthough, Task Centered System Design (TCSD), Severity Ratin

Testing of autobiographical memory in people suffering from war post-traumatic stress disorder

Posttraumatski stresni poremećaj (PTSP) psihijatrijski je poremećaj kojeg karakterizira nametljivo sjećanje na središnji nasilni događaj (Goleman, 2003). Među dosad relativno neistraženim posljedicama PSTP-a spada i svojevrstan fenomen pretjeranog dosjećanja općih autobiografskih događaja (OAD) ili engleski overgeneral autobiographical memory (OGM). Ispitivanje autobiografskog pamćenja relativno je nova pojava, no, unatoč tome, konzistentni rezultati dosadašnjih ispitivanja na ovom području upućuju na negativnu povezanost specifičnosti autobiografskog pamćenja i posttraumatskog stresnog poremećaja (PTSP-a). Budući da sličnih istraţivanja autobiografskog pamćenja u RH još nije bilo, cilj ovog istraţivanja bio je ispitati autobiografsko pamćenje kod osoba oboljelih od ratnog PTSP-a. U istraţivanju je sudjelovalo ukupno 60 osoba, odnosno 30 zdravih pojedinaca te 30 pojedinaca oboljelih od PTSP-a. Rezultati dobiveni ovim istraţivanjem potvrdili su dosadašnja istraţivanja o fenomenu pretjeranog dosjećanja općih autobiografskih događaja, tj. ispitanici oboljeli od PTSP-a pokazali su značajnu reduciranost specifičnosti autobiografskog pamćenja za razliku od zdravih ispitanika. Osim navedenog fenomena, nastojalo se utvrditi postoji li razlika u dosjećanju općih i specifičnih autobiografskih događaja kod osoba oboljelih od PTSP-a u odnosu na osobe bez PTSP-a s obzirom na konotativno značenje riječi. Unatoč pretpostavci da će negativne riječi dovesti do dosjećanja negativnih autobiografskih događaja i samim time do negativnog raspoloženja što bi u konačnici rezultiralo pojavom OAD-a za razliku od pozitivnih riječi gdje ne bi trebalo doći do OAD-a, ta razlika nije dobivena ni kod dosjećanja općih ni specifičnih autobiografskih događaja. Konotativno značenje riječi u ovom slučaju nema nikakvog učinka na OAD kod osoba oboljelih od PTSP-a u odnosu na osobe bez PTSP-a.Posttraumatic stress disorder (PTSD) is a psychiatric disorder characterized by intrusive memories of the central violent event (Goleman, 2003). Among the relatively unexplored consequences of PSTD is also a phenomenon called overgeneral autobiographical memory (OGM). Testing of autobiographical memory is a relatively new phenomenon, but, nevertheless, consistent results of previous studies in this area indicate a negative correlation between specificity of autobiographical memory and posttraumatic stress disorder (PTSD). Because there have not been similar studies of autobiographical memory in Croatia, the aim of this study was to investigate the autobiographical memory in people suffering from war PTSD in Croatia. The study included 60 people of which 30 were healthy subjects and 30 were patients suffering from PTSD. Results which were obtained in this study confirmed previous researches of the phenomenon of overgeneral autobiographical memory. In other words, subjects suffering from PTSD showed significant reduction in the specificity of autobiographical memory in contrast to the healthy subjects. In addition to this phenomenon, we tried to determine whether there is a difference recall of the general and specific autobiographical memory in people with PTSD compared to those without PTSD due to the connotative meaning of the word. Despite the assumption that negative words lead to the recall of negative autobiographical events and thus to a negative mood which would ultimately result in the emergence of the OGM versus positive words which would not result in the emergence to the OGM, this difference was not obtained at the general recall, nor specific autobiographical memory. The connotative meaning of the word in this case has no effect on OGM in people with PTSD compared to people without PTSD

Karcinom dojke u trudnoći

Pregnancy-associated breast cancer is a difficult psychosocial and health problem for the patient, demanding an individual multidisciplinary treatment approach. Due to the need for aggressive oncological treatment with minimal adverse effects on the growing fetus, numerous studies are carried out to fi nd an optimal protocol, concerning the interest of both the mother and the child. Due to the physiological changes in the breasts in pregnancy, the diagnosis of breast cancer can be delayed and therefore patients have often higher clinical stage of the disease at initial presentation comparing to non-pregnant patients. Pregnancy termination due to breast cancer diagnosis had no effect on the prognosis of the patient, and longterm studies did not find a higher incidence of malignant disease in children who were exposed to chemotherapy in utero compared to the general population. Although prognosis data of those patients is controversial, recent studies have not found a worse outcome compared to breast cancer unrelated to pregnancy.Karcinom dojke povezan s trudnoćom teški je psihosocijalni i zdravstveni problem za pacijenticu i zahtjeva individualni multidisciplinarni pristup liječenju. Zbog potrebe za agresivnim onkološkim liječenjem, uz minimalne štetne utjecaje na rastući fetus, provode se brojne studije, čiji je zadatak pronaći optimalan protokol, vodeći se interesom i majke i djeteta. Zbog fizioloških promjena dojke tijekom trudnoće, može doći do kašnjenja u postavljanju dijagnoze karcinoma dojke i samim time višeg stadija bolesti pri inicijalnoj prezentaciji. Prekid trudnoće zbog dijagnoze karcinoma dojke nije mijenjao prognozu bolesti, a dugogodišnje studije nisu pokazale višu učestalost zloćudnih bolesti u djece intrauterino izložene kemoterapiji, u odnosu na opću populaciju. Iako su podaci o prognozi tih bolesnica kontroverzni, ipak većina novih studija nije ustanovila lošiji ishod u odnosu na bolesnice s karcinomom dojke nepovezanim sa trudnoćom

Testing the contributions of mental hardiness, social support and stress resilience in explaining professional burnout

Osnovni cilj ovog istraţivanja bio je ispitati nezavisne doprinose mentalne čvrstoće, socijalne podrške nadređenih, kolega i partnera te otpornosti na stres u objašnjenju dvije dimenzije profesionalnog sagorijevanja (iscrpljenosti i otuđenosti), nakon kontrole osnovnih sociodemografskih i nekih radnih karakteristika. S obzirom na dosadašnja istraživanja, očekivano je da će sva tri prediktora imati značajan doprinos u objašnjenju profesionalnog sagorijevanja, preciznije da će pojedinci s višim razinama mentalne čvrstoće, socijalne podrške iz tri navedena izvora te otpornosti na stres imati manje razine sagorijevanja. U istraživanju je sudjelovalo ukupno 1751 hrvatskih zaposlenika, od čega 315 muškaraca i 1436 žena. Ukupan raspon godina zaposlenika bio je od 17 do 65 godina, dok je prosječna dob zaposlenika u cijelom uzorku iznosila 35 godina (M= 35.22, SD=9.2). Dobiveni rezultati su većinom u skladu s očekivanjima, naime pokazalo se da su zaposlenici s manjom mentalnom čvrstoćom, slabijom socijalnom podrškom nadređenog i kolega te manjom otpornosti na stres otuđeniji i iscrpljeniji. Iznimka je rezultat vezan za socijalnu podršku partnera koja se nije pokazala prediktivnom u objašnjenju profesionalnog sagorijevanja. Dodatno, rezultati su pokazali značajne doprinose nekih sociodemografskih i radnih karakteristika u objašnjenju dimenzija sagorijevanja. Naime, u pogledu otuđenosti, značajne doprinose imali su sektor i razina plaće, pri čemu se pokazalo da su zaposlenici u javnom sektoru te zaposlenici s prosječnom i iznadprosječnom plaćom manje otuđeni od zaposlenika u privatnom sektoru te zaposlenika s ispodprosječnom plaćom. U pogledu iscrpljenosti, dobiveni su značajni doprinosi spola i broja radnih sati, pri čemu više razine iscrpljenosti doživljavaju žene te zaposlenici s višim brojem radnih sati.The main objective of this study was to examine the independent contributions of mental hardiness, social support of superiors, colleagues and partners, and stress resilience in explaining two dimensions of professional burnout (detachment and exhaustion) after controlling basic sociodemographic and some work characteristics. Given the current research, it is expected that all three predictors will have a significant contribution to the explanation of professional burnout, more specifically that individuals with higher levels of mental strength, social support from the three mentioned sources and stress resilience will have less burnout rates. A total of 1751 Croatian employees participated in the study, out of which 315 men and 1436 women. The range of age was between 17 and 65 years, while the average age of employees in the entire sample was 35 years (M = 35.22, SD = 9.2). The obtained results are consistent with expectations that employees with less mental strength, poorer social support of their supervisor and colleagues, and less resilience to stress are more detached and exhausted. The exception is the result of the social support of a partner which has not been predictive in the explanation of professional burnout. In addition, the results have shown significant contributions to some sociodemographic and working characteristics in explaining the dimensions of burnout. So, in terms of detachment, significant contributions had the sector and the level of wages, showing that public sector employees and employees with average and above average wages were less detached than employees in the private sector and employees with underpayment. In terms of exhaustion, significant gender and work hours contributions have been obtained, with higher levels of exhaustion experienced by women and employees with higher number of working hours